| Message ID | 20211123214814.3756047-3-pasha.tatashin@soleen.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | page table check | expand |
It seems after updating to linux-next-20211125, my system is crashing frequently due to "kernel BUG at mm/page_table_check.c:101". linux-next-20211124 does not have the issue. A bug was also reported on https://bugzilla.opensuse.org/show_bug.cgi?id=1193125 journactl output before sysrq reboot: ``` 11月 27 15:13:10 ZHAN66 kernel: ------------[ cut here ]------------ 11月 27 15:13:10 ZHAN66 kernel: kernel BUG at mm/page_table_check.c:101! 11月 27 15:13:10 ZHAN66 kernel: invalid opcode: 0000 [#1] PREEMPT SMP NOPTI 11月 27 15:13:10 ZHAN66 kernel: CPU: 0 PID: 75 Comm: kcompactd0 Not tainted 5.16.0-rc2-next-20211125-1.ga5a7188-vanilla #1 3000d4f4dc38a6eb529f948e10865da4957e57dc 11月 27 15:13:10 ZHAN66 kernel: Hardware name: HP HP ZHAN 66 Pro A 14 G3/876B, BIOS S81 Ver. 01.03.01 10/23/2020 11月 27 15:13:10 ZHAN66 kernel: RIP: 0010:page_table_check_clear.part.0+0xbb/0xd0 11月 27 15:13:10 ZHAN66 kernel: Code: d8 0f 0b f7 c3 ff 0f 00 00 75 97 48 8b 13 f7 c2 00 00 01 00 74 8c 48 8b 53 48 4c 8d 62 ff 83 e2 01 4c 0f 44 e3 e9 78 ff ff ff <0f> 0b 0f 0b 0f 0b 5b 5d 41 5c c3 66 2e 0f 1f 84 00 00 00 00 00 0f 11月 27 15:13:10 ZHAN66 kernel: RSP: 0018:ffffb784403e7a80 EFLAGS: 00010202 11月 27 15:13:10 ZHAN66 kernel: RAX: ffff987f419362e0 RBX: fffff1cf842d8b80 RCX: 0000000000000000 11月 27 15:13:10 ZHAN66 kernel: RDX: ffff987f419362e8 RSI: 0000000000000001 RDI: 0000000000000001 11月 27 15:13:10 ZHAN66 kernel: RBP: 0000000000000001 R08: 00000000ffffffff R09: 0000000000000825 11月 27 15:13:10 ZHAN66 kernel: R10: 0000000000000067 R11: 000000000003a878 R12: fffff1cf842d8b80 11月 27 15:13:10 ZHAN66 kernel: R13: ffff987f468e9100 R14: ffff98801df1e960 R15: 03ffffffffffffff 11月 27 15:13:10 ZHAN66 kernel: FS: 0000000000000000(0000) GS:ffff98823f400000(0000) knlGS:0000000000000000 11月 27 15:13:10 ZHAN66 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 11月 27 15:13:10 ZHAN66 kernel: CR2: 00007f9b8591bd20 CR3: 0000000161d0c000 CR4: 0000000000350ef0 11月 27 15:13:10 ZHAN66 kernel: Call Trace: 11月 27 15:13:10 ZHAN66 kernel: <TASK> 11月 27 15:13:10 ZHAN66 kernel: ptep_clear_flush+0x7e/0x80 11月 27 15:13:10 ZHAN66 kernel: try_to_migrate_one+0x1b5/0x9e0 11月 27 15:13:10 ZHAN66 kernel: ? __mod_memcg_lruvec_state+0x41/0x80 11月 27 15:13:10 ZHAN66 kernel: rmap_walk_anon+0x121/0x270 11月 27 15:13:10 ZHAN66 kernel: try_to_migrate+0x129/0x1c0 11月 27 15:13:10 ZHAN66 kernel: ? try_to_unmap_one+0x1010/0x1010 11月 27 15:13:10 ZHAN66 kernel: ? anon_vma_ctor+0x40/0x40 11月 27 15:13:10 ZHAN66 kernel: ? page_get_anon_vma+0xc0/0xc0 11月 27 15:13:10 ZHAN66 kernel: ? invalid_mkclean_vma+0x20/0x20 11月 27 15:13:10 ZHAN66 kernel: migrate_pages+0x10f3/0x16e0 11月 27 15:13:10 ZHAN66 kernel: ? isolate_freepages_block+0x460/0x460 11月 27 15:13:10 ZHAN66 kernel: ? move_freelist_tail+0xc0/0xc0 11月 27 15:13:10 ZHAN66 kernel: ? migrate_page+0xe0/0xe0 11月 27 15:13:10 ZHAN66 kernel: compact_zone+0x5ec/0xe70 11月 27 15:13:10 ZHAN66 kernel: ? finish_task_switch.isra.0+0xb4/0x2c0 11月 27 15:13:10 ZHAN66 kernel: proactive_compact_node+0x88/0xc0 11月 27 15:13:10 ZHAN66 kernel: kcompactd+0x1c4/0x410 11月 27 15:13:10 ZHAN66 kernel: ? wait_woken+0x70/0x70 11月 27 15:13:10 ZHAN66 kernel: ? kcompactd_do_work+0x290/0x290 11月 27 15:13:10 ZHAN66 kernel: kthread+0x15a/0x180 11月 27 15:13:10 ZHAN66 kernel: ? set_kthread_struct+0x40/0x40 11月 27 15:13:10 ZHAN66 kernel: ret_from_fork+0x1f/0x30 11月 27 15:13:10 ZHAN66 kernel: </TASK> 11月 27 15:13:10 ZHAN66 kernel: Modules linked in: uinput rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device af_packet r8153_ecm cdc_ether usbnet cmac algif_hash algif_skcipher af_alg nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib r8152 mii nft_reject_inet nf_reje> 11月 27 15:13:10 ZHAN66 kernel: snd_hda_core snd_compress snd_pcm_dmaengine snd_pci_acp6x snd_hwdep snd_pcm cfg80211 r8169 snd_timer ucsi_acpi snd realtek typec_ucsi snd_pci_acp5x mdio_devres snd_rn_pci_acp3x typec soundcore snd_pci_acp3x libphy roles rfkill nls_iso88> 11月 27 15:13:10 ZHAN66 kernel: ---[ end trace 7dff3b4592ed7de0 ]--- 11月 27 15:13:10 ZHAN66 kernel: RIP: 0010:page_table_check_clear.part.0+0xbb/0xd0 11月 27 15:13:10 ZHAN66 kernel: Code: d8 0f 0b f7 c3 ff 0f 00 00 75 97 48 8b 13 f7 c2 00 00 01 00 74 8c 48 8b 53 48 4c 8d 62 ff 83 e2 01 4c 0f 44 e3 e9 78 ff ff ff <0f> 0b 0f 0b 0f 0b 5b 5d 41 5c c3 66 2e 0f 1f 84 00 00 00 00 00 0f 11月 27 15:13:10 ZHAN66 kernel: RSP: 0018:ffffb784403e7a80 EFLAGS: 00010202 11月 27 15:13:10 ZHAN66 kernel: RAX: ffff987f419362e0 RBX: fffff1cf842d8b80 RCX: 0000000000000000 11月 27 15:13:10 ZHAN66 kernel: RDX: ffff987f419362e8 RSI: 0000000000000001 RDI: 0000000000000001 11月 27 15:13:10 ZHAN66 kernel: RBP: 0000000000000001 R08: 00000000ffffffff R09: 0000000000000825 11月 27 15:13:10 ZHAN66 kernel: R10: 0000000000000067 R11: 000000000003a878 R12: fffff1cf842d8b80 11月 27 15:13:10 ZHAN66 kernel: R13: ffff987f468e9100 R14: ffff98801df1e960 R15: 03ffffffffffffff 11月 27 15:13:10 ZHAN66 kernel: FS: 0000000000000000(0000) GS:ffff98823f400000(0000) knlGS:0000000000000000 11月 27 15:13:10 ZHAN66 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 11月 27 15:13:10 ZHAN66 kernel: CR2: 00007f9b8591bd20 CR3: 0000000161d0c000 CR4: 0000000000350ef0 11月 27 15:13:10 ZHAN66 kernel: note: kcompactd0[75] exited with preempt_count 1 11月 27 15:13:13 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:13 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:13 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-contrast-client-protocol.h" 11月 27 15:13:15 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:15 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:15 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-blur-server-protocol.h" 11月 27 15:13:22 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:22 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:22 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-slide-client-protocol.h" 11月 27 15:13:30 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:30 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:30 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-shadow-client-protocol.h" 11月 27 15:13:33 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:33 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:33 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-fake-input-server-protocol.h" 11月 27 15:13:36 ZHAN66 kernel: watchdog: BUG: soft lockup - CPU#4 stuck for 22s! [plasmashell:6294] 11月 27 15:13:36 ZHAN66 kernel: Modules linked in: uinput rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device af_packet r8153_ecm cdc_ether usbnet cmac algif_hash algif_skcipher af_alg nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib r8152 mii nft_reject_inet nf_reje> 11月 27 15:13:36 ZHAN66 kernel: snd_hda_core snd_compress snd_pcm_dmaengine snd_pci_acp6x snd_hwdep snd_pcm cfg80211 r8169 snd_timer ucsi_acpi snd realtek typec_ucsi snd_pci_acp5x mdio_devres snd_rn_pci_acp3x typec soundcore snd_pci_acp3x libphy roles rfkill nls_iso88> 11月 27 15:13:36 ZHAN66 kernel: CPU: 4 PID: 6294 Comm: plasmashell Tainted: G D 5.16.0-rc2-next-20211125-1.ga5a7188-vanilla #1 3000d4f4dc38a6eb529f948e10865da4957e57dc 11月 27 15:13:36 ZHAN66 kernel: Hardware name: HP HP ZHAN 66 Pro A 14 G3/876B, BIOS S81 Ver. 01.03.01 10/23/2020 11月 27 15:13:36 ZHAN66 kernel: RIP: 0010:native_queued_spin_lock_slowpath+0x5c/0x1d0 11月 27 15:13:36 ZHAN66 kernel: Code: 0f ba 2a 08 0f 92 c1 8b 02 0f b6 c9 c1 e1 08 30 e4 09 c8 a9 00 01 ff ff 0f 85 11 01 00 00 85 c0 74 0e 8b 02 84 c0 74 08 f3 90 <8b> 02 84 c0 75 f8 b8 01 00 00 00 66 89 02 c3 8b 37 b9 00 02 00 00 11月 27 15:13:36 ZHAN66 kernel: RSP: 0000:ffffb78441ca3d48 EFLAGS: 00000202 11月 27 15:13:36 ZHAN66 kernel: RAX: 0000000000000101 RBX: 0000000000000028 RCX: 0000000000000000 11月 27 15:13:36 ZHAN66 kernel: RDX: fffff1cf88a25ca8 RSI: 0000000000000000 RDI: fffff1cf88a25ca8 11月 27 15:13:36 ZHAN66 kernel: RBP: ffffb78441ca3e00 R08: 0000000000000028 R09: fffff1cf88a25ca8 11月 27 15:13:36 ZHAN66 kernel: R10: 0000000000000000 R11: 0000000000000000 R12: 00007fac2d8f0000 11月 27 15:13:36 ZHAN66 kernel: R13: 0000000000000000 R14: fffff1cf8a86d200 R15: ffff987f48994af0 11月 27 15:13:36 ZHAN66 kernel: FS: 00007fac28a23e40(0000) GS:ffff98823f500000(0000) knlGS:0000000000000000 11月 27 15:13:36 ZHAN66 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 11月 27 15:13:36 ZHAN66 kernel: CR2: 00007fac2d8f0c60 CR3: 000000010b950000 CR4: 0000000000350ee0 11月 27 15:13:36 ZHAN66 kernel: Call Trace: 11月 27 15:13:36 ZHAN66 kernel: <TASK> 11月 27 15:13:36 ZHAN66 kernel: _raw_spin_lock+0x21/0x30 11月 27 15:13:36 ZHAN66 kernel: filemap_map_pages+0x2f6/0x690 11月 27 15:13:36 ZHAN66 kernel: __handle_mm_fault+0xcbd/0x1550 11月 27 15:13:10 ZHAN66 kernel: compact_zone+0x5ec/0xe70 11月 27 15:13:10 ZHAN66 kernel: ? finish_task_switch.isra.0+0xb4/0x2c0 11月 27 15:13:10 ZHAN66 kernel: proactive_compact_node+0x88/0xc0 11月 27 15:13:10 ZHAN66 kernel: kcompactd+0x1c4/0x410 11月 27 15:13:10 ZHAN66 kernel: ? wait_woken+0x70/0x70 11月 27 15:13:10 ZHAN66 kernel: ? kcompactd_do_work+0x290/0x290 11月 27 15:13:10 ZHAN66 kernel: kthread+0x15a/0x180 11月 27 15:13:10 ZHAN66 kernel: ? set_kthread_struct+0x40/0x40 11月 27 15:13:10 ZHAN66 kernel: ret_from_fork+0x1f/0x30 11月 27 15:13:10 ZHAN66 kernel: </TASK> 11月 27 15:13:10 ZHAN66 kernel: Modules linked in: uinput rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device af_packet r8153_ecm cdc_ether usbnet cmac algif_hash algif_skcipher af_alg nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib r8152 mii nft_reject_inet nf_reje> 11月 27 15:13:10 ZHAN66 kernel: snd_hda_core snd_compress snd_pcm_dmaengine snd_pci_acp6x snd_hwdep snd_pcm cfg80211 r8169 snd_timer ucsi_acpi snd realtek typec_ucsi snd_pci_acp5x mdio_devres snd_rn_pci_acp3x typec soundcore snd_pci_acp3x libphy roles rfkill nls_iso88> 11月 27 15:13:10 ZHAN66 kernel: ---[ end trace 7dff3b4592ed7de0 ]--- 11月 27 15:13:10 ZHAN66 kernel: RIP: 0010:page_table_check_clear.part.0+0xbb/0xd0 11月 27 15:13:10 ZHAN66 kernel: Code: d8 0f 0b f7 c3 ff 0f 00 00 75 97 48 8b 13 f7 c2 00 00 01 00 74 8c 48 8b 53 48 4c 8d 62 ff 83 e2 01 4c 0f 44 e3 e9 78 ff ff ff <0f> 0b 0f 0b 0f 0b 5b 5d 41 5c c3 66 2e 0f 1f 84 00 00 00 00 00 0f 11月 27 15:13:10 ZHAN66 kernel: RSP: 0018:ffffb784403e7a80 EFLAGS: 00010202 11月 27 15:13:10 ZHAN66 kernel: RAX: ffff987f419362e0 RBX: fffff1cf842d8b80 RCX: 0000000000000000 11月 27 15:13:10 ZHAN66 kernel: RDX: ffff987f419362e8 RSI: 0000000000000001 RDI: 0000000000000001 11月 27 15:13:10 ZHAN66 kernel: RBP: 0000000000000001 R08: 00000000ffffffff R09: 0000000000000825 11月 27 15:13:10 ZHAN66 kernel: R10: 0000000000000067 R11: 000000000003a878 R12: fffff1cf842d8b80 11月 27 15:13:10 ZHAN66 kernel: R13: ffff987f468e9100 R14: ffff98801df1e960 R15: 03ffffffffffffff 11月 27 15:13:10 ZHAN66 kernel: FS: 0000000000000000(0000) GS:ffff98823f400000(0000) knlGS:0000000000000000 11月 27 15:13:10 ZHAN66 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 11月 27 15:13:10 ZHAN66 kernel: CR2: 00007f9b8591bd20 CR3: 0000000161d0c000 CR4: 0000000000350ef0 11月 27 15:13:10 ZHAN66 kernel: note: kcompactd0[75] exited with preempt_count 1 11月 27 15:13:13 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:13 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:13 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-contrast-client-protocol.h" 11月 27 15:13:15 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:15 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:15 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-blur-server-protocol.h" 11月 27 15:13:22 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:22 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:22 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-slide-client-protocol.h" 11月 27 15:13:30 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:30 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:30 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-shadow-client-protocol.h" 11月 27 15:13:33 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:33 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:33 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-fake-input-server-protocol.h" 11月 27 15:13:36 ZHAN66 kernel: watchdog: BUG: soft lockup - CPU#4 stuck for 22s! [plasmashell:6294] 11月 27 15:13:36 ZHAN66 kernel: Modules linked in: uinput rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device af_packet r8153_ecm cdc_ether usbnet cmac algif_hash algif_skcipher af_alg nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib r8152 mii nft_reject_inet nf_reje> 11月 27 15:13:36 ZHAN66 kernel: snd_hda_core snd_compress snd_pcm_dmaengine snd_pci_acp6x snd_hwdep snd_pcm cfg80211 r8169 snd_timer ucsi_acpi snd realtek typec_ucsi snd_pci_acp5x mdio_devres snd_rn_pci_acp3x typec soundcore snd_pci_acp3x libphy roles rfkill nls_iso88> 11月 27 15:13:36 ZHAN66 kernel: CPU: 4 PID: 6294 Comm: plasmashell Tainted: G D 5.16.0-rc2-next-20211125-1.ga5a7188-vanilla #1 3000d4f4dc38a6eb529f948e10865da4957e57dc 11月 27 15:13:36 ZHAN66 kernel: Hardware name: HP HP ZHAN 66 Pro A 14 G3/876B, BIOS S81 Ver. 01.03.01 10/23/2020 11月 27 15:13:36 ZHAN66 kernel: RIP: 0010:native_queued_spin_lock_slowpath+0x5c/0x1d0 11月 27 15:13:36 ZHAN66 kernel: Code: 0f ba 2a 08 0f 92 c1 8b 02 0f b6 c9 c1 e1 08 30 e4 09 c8 a9 00 01 ff ff 0f 85 11 01 00 00 85 c0 74 0e 8b 02 84 c0 74 08 f3 90 <8b> 02 84 c0 75 f8 b8 01 00 00 00 66 89 02 c3 8b 37 b9 00 02 00 00 11月 27 15:13:36 ZHAN66 kernel: RSP: 0000:ffffb78441ca3d48 EFLAGS: 00000202 11月 27 15:13:36 ZHAN66 kernel: RAX: 0000000000000101 RBX: 0000000000000028 RCX: 0000000000000000 11月 27 15:13:36 ZHAN66 kernel: RDX: fffff1cf88a25ca8 RSI: 0000000000000000 RDI: fffff1cf88a25ca8 11月 27 15:13:36 ZHAN66 kernel: RBP: ffffb78441ca3e00 R08: 0000000000000028 R09: fffff1cf88a25ca8 11月 27 15:13:36 ZHAN66 kernel: R10: 0000000000000000 R11: 0000000000000000 R12: 00007fac2d8f0000 11月 27 15:13:36 ZHAN66 kernel: R13: 0000000000000000 R14: fffff1cf8a86d200 R15: ffff987f48994af0 11月 27 15:13:36 ZHAN66 kernel: FS: 00007fac28a23e40(0000) GS:ffff98823f500000(0000) knlGS:0000000000000000 11月 27 15:13:36 ZHAN66 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 11月 27 15:13:36 ZHAN66 kernel: CR2: 00007fac2d8f0c60 CR3: 000000010b950000 CR4: 0000000000350ee0 11月 27 15:13:36 ZHAN66 kernel: Call Trace: 11月 27 15:13:36 ZHAN66 kernel: <TASK> 11月 27 15:13:36 ZHAN66 kernel: _raw_spin_lock+0x21/0x30 11月 27 15:13:36 ZHAN66 kernel: filemap_map_pages+0x2f6/0x690 11月 27 15:13:36 ZHAN66 kernel: __handle_mm_fault+0xcbd/0x1550 11月 27 15:13:36 ZHAN66 kernel: ? _copy_to_user+0x1c/0x30 11月 27 15:13:36 ZHAN66 kernel: handle_mm_fault+0xb2/0x280 11月 27 15:13:36 ZHAN66 kernel: do_user_addr_fault+0x1ba/0x690 11月 27 15:13:36 ZHAN66 kernel: ? do_syscall_64+0x69/0x80 11月 27 15:13:36 ZHAN66 kernel: exc_page_fault+0x68/0x150 11月 27 15:13:36 ZHAN66 kernel: ? asm_exc_page_fault+0x8/0x30 11月 27 15:13:36 ZHAN66 kernel: asm_exc_page_fault+0x1e/0x30 11月 27 15:13:36 ZHAN66 kernel: RIP: 0033:0x7fac2d8f0c60 11月 27 15:13:36 ZHAN66 kernel: Code: Unable to access opcode bytes at RIP 0x7fac2d8f0c36. 11月 27 15:13:36 ZHAN66 kernel: RSP: 002b:00007fff1c421988 EFLAGS: 00010206 11月 27 15:13:36 ZHAN66 kernel: RAX: 0000000000000001 RBX: 000055bed54aecb8 RCX: 000055bed54ce290 11月 27 15:13:36 ZHAN66 kernel: RDX: 000055bed54ce290 RSI: 000055bed7361ca8 RDI: 000055bed7315ba0 11月 27 15:13:36 ZHAN66 kernel: RBP: 000055bed7315ba0 R08: 0000000000000000 R09: 00007fac2b71f620 11月 27 15:13:36 ZHAN66 kernel: R10: 00007fff1c4a7080 R11: 9a5279bc9b9622a2 R12: 000055bed54aecc8 11月 27 15:13:36 ZHAN66 kernel: R13: 000055bed75d6980 R14: 000055bed55d58b0 R15: 00007fff1c421a40 11月 27 15:13:36 ZHAN66 kernel: </TASK> 11月 27 15:13:39 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:39 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:39 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-fake-input-client-protocol.h" 11月 27 15:13:43 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:43 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:43 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-blur-client-protocol.h" 11月 27 15:13:46 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:46 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:46 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-dpms-server-protocol.h" -- Boot 2c685d4adc43478f9350816f24a67c6d -- ```
It seems after updating to linux-next-20211125, my system is crashing frequently due to "kernel BUG at mm/page_table_check.c:101". linux-next-20211124 does not have the issue. A bug was also reported on https://bugzilla.opensuse.org/show_bug.cgi?id=1193125 journactl output before sysrq reboot: ``` 11月 27 15:13:10 ZHAN66 kernel: ------------[ cut here ]------------ 11月 27 15:13:10 ZHAN66 kernel: kernel BUG at mm/page_table_check.c:101! 11月 27 15:13:10 ZHAN66 kernel: invalid opcode: 0000 [#1] PREEMPT SMP NOPTI 11月 27 15:13:10 ZHAN66 kernel: CPU: 0 PID: 75 Comm: kcompactd0 Not tainted 5.16.0-rc2-next-20211125-1.ga5a7188-vanilla #1 3000d4f4dc38a6eb529f948e10865da4957e57dc 11月 27 15:13:10 ZHAN66 kernel: Hardware name: HP HP ZHAN 66 Pro A 14 G3/876B, BIOS S81 Ver. 01.03.01 10/23/2020 11月 27 15:13:10 ZHAN66 kernel: RIP: 0010:page_table_check_clear.part.0+0xbb/0xd0 11月 27 15:13:10 ZHAN66 kernel: Code: d8 0f 0b f7 c3 ff 0f 00 00 75 97 48 8b 13 f7 c2 00 00 01 00 74 8c 48 8b 53 48 4c 8d 62 ff 83 e2 01 4c 0f 44 e3 e9 78 ff ff ff <0f> 0b 0f 0b 0f 0b 5b 5d 41 5c c3 66 2e 0f 1f 84 00 00 00 00 00 0f 11月 27 15:13:10 ZHAN66 kernel: RSP: 0018:ffffb784403e7a80 EFLAGS: 00010202 11月 27 15:13:10 ZHAN66 kernel: RAX: ffff987f419362e0 RBX: fffff1cf842d8b80 RCX: 0000000000000000 11月 27 15:13:10 ZHAN66 kernel: RDX: ffff987f419362e8 RSI: 0000000000000001 RDI: 0000000000000001 11月 27 15:13:10 ZHAN66 kernel: RBP: 0000000000000001 R08: 00000000ffffffff R09: 0000000000000825 11月 27 15:13:10 ZHAN66 kernel: R10: 0000000000000067 R11: 000000000003a878 R12: fffff1cf842d8b80 11月 27 15:13:10 ZHAN66 kernel: R13: ffff987f468e9100 R14: ffff98801df1e960 R15: 03ffffffffffffff 11月 27 15:13:10 ZHAN66 kernel: FS: 0000000000000000(0000) GS:ffff98823f400000(0000) knlGS:0000000000000000 11月 27 15:13:10 ZHAN66 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 11月 27 15:13:10 ZHAN66 kernel: CR2: 00007f9b8591bd20 CR3: 0000000161d0c000 CR4: 0000000000350ef0 11月 27 15:13:10 ZHAN66 kernel: Call Trace: 11月 27 15:13:10 ZHAN66 kernel: <TASK> 11月 27 15:13:10 ZHAN66 kernel: ptep_clear_flush+0x7e/0x80 11月 27 15:13:10 ZHAN66 kernel: try_to_migrate_one+0x1b5/0x9e0 11月 27 15:13:10 ZHAN66 kernel: ? __mod_memcg_lruvec_state+0x41/0x80 11月 27 15:13:10 ZHAN66 kernel: rmap_walk_anon+0x121/0x270 11月 27 15:13:10 ZHAN66 kernel: try_to_migrate+0x129/0x1c0 11月 27 15:13:10 ZHAN66 kernel: ? try_to_unmap_one+0x1010/0x1010 11月 27 15:13:10 ZHAN66 kernel: ? anon_vma_ctor+0x40/0x40 11月 27 15:13:10 ZHAN66 kernel: ? page_get_anon_vma+0xc0/0xc0 11月 27 15:13:10 ZHAN66 kernel: ? invalid_mkclean_vma+0x20/0x20 11月 27 15:13:10 ZHAN66 kernel: migrate_pages+0x10f3/0x16e0 11月 27 15:13:10 ZHAN66 kernel: ? isolate_freepages_block+0x460/0x460 11月 27 15:13:10 ZHAN66 kernel: ? move_freelist_tail+0xc0/0xc0 11月 27 15:13:10 ZHAN66 kernel: ? migrate_page+0xe0/0xe0 11月 27 15:13:10 ZHAN66 kernel: compact_zone+0x5ec/0xe70 11月 27 15:13:10 ZHAN66 kernel: ? finish_task_switch.isra.0+0xb4/0x2c0 11月 27 15:13:10 ZHAN66 kernel: proactive_compact_node+0x88/0xc0 11月 27 15:13:10 ZHAN66 kernel: kcompactd+0x1c4/0x410 11月 27 15:13:10 ZHAN66 kernel: ? wait_woken+0x70/0x70 11月 27 15:13:10 ZHAN66 kernel: ? kcompactd_do_work+0x290/0x290 11月 27 15:13:10 ZHAN66 kernel: kthread+0x15a/0x180 11月 27 15:13:10 ZHAN66 kernel: ? set_kthread_struct+0x40/0x40 11月 27 15:13:10 ZHAN66 kernel: ret_from_fork+0x1f/0x30 11月 27 15:13:10 ZHAN66 kernel: </TASK> 11月 27 15:13:10 ZHAN66 kernel: Modules linked in: uinput rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device af_packet r8153_ecm cdc_ether usbnet cmac algif_hash algif_skcipher af_alg nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib r8152 mii nft_reject_inet nf_reje> 11月 27 15:13:10 ZHAN66 kernel: snd_hda_core snd_compress snd_pcm_dmaengine snd_pci_acp6x snd_hwdep snd_pcm cfg80211 r8169 snd_timer ucsi_acpi snd realtek typec_ucsi snd_pci_acp5x mdio_devres snd_rn_pci_acp3x typec soundcore snd_pci_acp3x libphy roles rfkill nls_iso88> 11月 27 15:13:10 ZHAN66 kernel: ---[ end trace 7dff3b4592ed7de0 ]--- 11月 27 15:13:10 ZHAN66 kernel: RIP: 0010:page_table_check_clear.part.0+0xbb/0xd0 11月 27 15:13:10 ZHAN66 kernel: Code: d8 0f 0b f7 c3 ff 0f 00 00 75 97 48 8b 13 f7 c2 00 00 01 00 74 8c 48 8b 53 48 4c 8d 62 ff 83 e2 01 4c 0f 44 e3 e9 78 ff ff ff <0f> 0b 0f 0b 0f 0b 5b 5d 41 5c c3 66 2e 0f 1f 84 00 00 00 00 00 0f 11月 27 15:13:10 ZHAN66 kernel: RSP: 0018:ffffb784403e7a80 EFLAGS: 00010202 11月 27 15:13:10 ZHAN66 kernel: RAX: ffff987f419362e0 RBX: fffff1cf842d8b80 RCX: 0000000000000000 11月 27 15:13:10 ZHAN66 kernel: RDX: ffff987f419362e8 RSI: 0000000000000001 RDI: 0000000000000001 11月 27 15:13:10 ZHAN66 kernel: RBP: 0000000000000001 R08: 00000000ffffffff R09: 0000000000000825 11月 27 15:13:10 ZHAN66 kernel: R10: 0000000000000067 R11: 000000000003a878 R12: fffff1cf842d8b80 11月 27 15:13:10 ZHAN66 kernel: R13: ffff987f468e9100 R14: ffff98801df1e960 R15: 03ffffffffffffff 11月 27 15:13:10 ZHAN66 kernel: FS: 0000000000000000(0000) GS:ffff98823f400000(0000) knlGS:0000000000000000 11月 27 15:13:10 ZHAN66 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 11月 27 15:13:10 ZHAN66 kernel: CR2: 00007f9b8591bd20 CR3: 0000000161d0c000 CR4: 0000000000350ef0 11月 27 15:13:10 ZHAN66 kernel: note: kcompactd0[75] exited with preempt_count 1 11月 27 15:13:13 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:13 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:13 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-contrast-client-protocol.h" 11月 27 15:13:15 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:15 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:15 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-blur-server-protocol.h" 11月 27 15:13:22 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:22 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:22 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-slide-client-protocol.h" 11月 27 15:13:30 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:30 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:30 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-shadow-client-protocol.h" 11月 27 15:13:33 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:33 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:33 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-fake-input-server-protocol.h" 11月 27 15:13:36 ZHAN66 kernel: watchdog: BUG: soft lockup - CPU#4 stuck for 22s! [plasmashell:6294] 11月 27 15:13:36 ZHAN66 kernel: Modules linked in: uinput rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device af_packet r8153_ecm cdc_ether usbnet cmac algif_hash algif_skcipher af_alg nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib r8152 mii nft_reject_inet nf_reje> 11月 27 15:13:36 ZHAN66 kernel: snd_hda_core snd_compress snd_pcm_dmaengine snd_pci_acp6x snd_hwdep snd_pcm cfg80211 r8169 snd_timer ucsi_acpi snd realtek typec_ucsi snd_pci_acp5x mdio_devres snd_rn_pci_acp3x typec soundcore snd_pci_acp3x libphy roles rfkill nls_iso88> 11月 27 15:13:36 ZHAN66 kernel: CPU: 4 PID: 6294 Comm: plasmashell Tainted: G D 5.16.0-rc2-next-20211125-1.ga5a7188-vanilla #1 3000d4f4dc38a6eb529f948e10865da4957e57dc 11月 27 15:13:36 ZHAN66 kernel: Hardware name: HP HP ZHAN 66 Pro A 14 G3/876B, BIOS S81 Ver. 01.03.01 10/23/2020 11月 27 15:13:36 ZHAN66 kernel: RIP: 0010:native_queued_spin_lock_slowpath+0x5c/0x1d0 11月 27 15:13:36 ZHAN66 kernel: Code: 0f ba 2a 08 0f 92 c1 8b 02 0f b6 c9 c1 e1 08 30 e4 09 c8 a9 00 01 ff ff 0f 85 11 01 00 00 85 c0 74 0e 8b 02 84 c0 74 08 f3 90 <8b> 02 84 c0 75 f8 b8 01 00 00 00 66 89 02 c3 8b 37 b9 00 02 00 00 11月 27 15:13:36 ZHAN66 kernel: RSP: 0000:ffffb78441ca3d48 EFLAGS: 00000202 11月 27 15:13:36 ZHAN66 kernel: RAX: 0000000000000101 RBX: 0000000000000028 RCX: 0000000000000000 11月 27 15:13:36 ZHAN66 kernel: RDX: fffff1cf88a25ca8 RSI: 0000000000000000 RDI: fffff1cf88a25ca8 11月 27 15:13:36 ZHAN66 kernel: RBP: ffffb78441ca3e00 R08: 0000000000000028 R09: fffff1cf88a25ca8 11月 27 15:13:36 ZHAN66 kernel: R10: 0000000000000000 R11: 0000000000000000 R12: 00007fac2d8f0000 11月 27 15:13:36 ZHAN66 kernel: R13: 0000000000000000 R14: fffff1cf8a86d200 R15: ffff987f48994af0 11月 27 15:13:36 ZHAN66 kernel: FS: 00007fac28a23e40(0000) GS:ffff98823f500000(0000) knlGS:0000000000000000 11月 27 15:13:36 ZHAN66 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 11月 27 15:13:36 ZHAN66 kernel: CR2: 00007fac2d8f0c60 CR3: 000000010b950000 CR4: 0000000000350ee0 11月 27 15:13:36 ZHAN66 kernel: Call Trace: 11月 27 15:13:36 ZHAN66 kernel: <TASK> 11月 27 15:13:36 ZHAN66 kernel: _raw_spin_lock+0x21/0x30 11月 27 15:13:36 ZHAN66 kernel: filemap_map_pages+0x2f6/0x690 11月 27 15:13:36 ZHAN66 kernel: __handle_mm_fault+0xcbd/0x1550 11月 27 15:13:10 ZHAN66 kernel: compact_zone+0x5ec/0xe70 11月 27 15:13:10 ZHAN66 kernel: ? finish_task_switch.isra.0+0xb4/0x2c0 11月 27 15:13:10 ZHAN66 kernel: proactive_compact_node+0x88/0xc0 11月 27 15:13:10 ZHAN66 kernel: kcompactd+0x1c4/0x410 11月 27 15:13:10 ZHAN66 kernel: ? wait_woken+0x70/0x70 11月 27 15:13:10 ZHAN66 kernel: ? kcompactd_do_work+0x290/0x290 11月 27 15:13:10 ZHAN66 kernel: kthread+0x15a/0x180 11月 27 15:13:10 ZHAN66 kernel: ? set_kthread_struct+0x40/0x40 11月 27 15:13:10 ZHAN66 kernel: ret_from_fork+0x1f/0x30 11月 27 15:13:10 ZHAN66 kernel: </TASK> 11月 27 15:13:10 ZHAN66 kernel: Modules linked in: uinput rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device af_packet r8153_ecm cdc_ether usbnet cmac algif_hash algif_skcipher af_alg nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib r8152 mii nft_reject_inet nf_reje> 11月 27 15:13:10 ZHAN66 kernel: snd_hda_core snd_compress snd_pcm_dmaengine snd_pci_acp6x snd_hwdep snd_pcm cfg80211 r8169 snd_timer ucsi_acpi snd realtek typec_ucsi snd_pci_acp5x mdio_devres snd_rn_pci_acp3x typec soundcore snd_pci_acp3x libphy roles rfkill nls_iso88> 11月 27 15:13:10 ZHAN66 kernel: ---[ end trace 7dff3b4592ed7de0 ]--- 11月 27 15:13:10 ZHAN66 kernel: RIP: 0010:page_table_check_clear.part.0+0xbb/0xd0 11月 27 15:13:10 ZHAN66 kernel: Code: d8 0f 0b f7 c3 ff 0f 00 00 75 97 48 8b 13 f7 c2 00 00 01 00 74 8c 48 8b 53 48 4c 8d 62 ff 83 e2 01 4c 0f 44 e3 e9 78 ff ff ff <0f> 0b 0f 0b 0f 0b 5b 5d 41 5c c3 66 2e 0f 1f 84 00 00 00 00 00 0f 11月 27 15:13:10 ZHAN66 kernel: RSP: 0018:ffffb784403e7a80 EFLAGS: 00010202 11月 27 15:13:10 ZHAN66 kernel: RAX: ffff987f419362e0 RBX: fffff1cf842d8b80 RCX: 0000000000000000 11月 27 15:13:10 ZHAN66 kernel: RDX: ffff987f419362e8 RSI: 0000000000000001 RDI: 0000000000000001 11月 27 15:13:10 ZHAN66 kernel: RBP: 0000000000000001 R08: 00000000ffffffff R09: 0000000000000825 11月 27 15:13:10 ZHAN66 kernel: R10: 0000000000000067 R11: 000000000003a878 R12: fffff1cf842d8b80 11月 27 15:13:10 ZHAN66 kernel: R13: ffff987f468e9100 R14: ffff98801df1e960 R15: 03ffffffffffffff 11月 27 15:13:10 ZHAN66 kernel: FS: 0000000000000000(0000) GS:ffff98823f400000(0000) knlGS:0000000000000000 11月 27 15:13:10 ZHAN66 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 11月 27 15:13:10 ZHAN66 kernel: CR2: 00007f9b8591bd20 CR3: 0000000161d0c000 CR4: 0000000000350ef0 11月 27 15:13:10 ZHAN66 kernel: note: kcompactd0[75] exited with preempt_count 1 11月 27 15:13:13 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:13 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:13 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-contrast-client-protocol.h" 11月 27 15:13:15 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:15 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:15 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-blur-server-protocol.h" 11月 27 15:13:22 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:22 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:22 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-slide-client-protocol.h" 11月 27 15:13:30 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:30 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:30 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-shadow-client-protocol.h" 11月 27 15:13:33 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:33 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:33 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-fake-input-server-protocol.h" 11月 27 15:13:36 ZHAN66 kernel: watchdog: BUG: soft lockup - CPU#4 stuck for 22s! [plasmashell:6294] 11月 27 15:13:36 ZHAN66 kernel: Modules linked in: uinput rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device af_packet r8153_ecm cdc_ether usbnet cmac algif_hash algif_skcipher af_alg nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib r8152 mii nft_reject_inet nf_reje> 11月 27 15:13:36 ZHAN66 kernel: snd_hda_core snd_compress snd_pcm_dmaengine snd_pci_acp6x snd_hwdep snd_pcm cfg80211 r8169 snd_timer ucsi_acpi snd realtek typec_ucsi snd_pci_acp5x mdio_devres snd_rn_pci_acp3x typec soundcore snd_pci_acp3x libphy roles rfkill nls_iso88> 11月 27 15:13:36 ZHAN66 kernel: CPU: 4 PID: 6294 Comm: plasmashell Tainted: G D 5.16.0-rc2-next-20211125-1.ga5a7188-vanilla #1 3000d4f4dc38a6eb529f948e10865da4957e57dc 11月 27 15:13:36 ZHAN66 kernel: Hardware name: HP HP ZHAN 66 Pro A 14 G3/876B, BIOS S81 Ver. 01.03.01 10/23/2020 11月 27 15:13:36 ZHAN66 kernel: RIP: 0010:native_queued_spin_lock_slowpath+0x5c/0x1d0 11月 27 15:13:36 ZHAN66 kernel: Code: 0f ba 2a 08 0f 92 c1 8b 02 0f b6 c9 c1 e1 08 30 e4 09 c8 a9 00 01 ff ff 0f 85 11 01 00 00 85 c0 74 0e 8b 02 84 c0 74 08 f3 90 <8b> 02 84 c0 75 f8 b8 01 00 00 00 66 89 02 c3 8b 37 b9 00 02 00 00 11月 27 15:13:36 ZHAN66 kernel: RSP: 0000:ffffb78441ca3d48 EFLAGS: 00000202 11月 27 15:13:36 ZHAN66 kernel: RAX: 0000000000000101 RBX: 0000000000000028 RCX: 0000000000000000 11月 27 15:13:36 ZHAN66 kernel: RDX: fffff1cf88a25ca8 RSI: 0000000000000000 RDI: fffff1cf88a25ca8 11月 27 15:13:36 ZHAN66 kernel: RBP: ffffb78441ca3e00 R08: 0000000000000028 R09: fffff1cf88a25ca8 11月 27 15:13:36 ZHAN66 kernel: R10: 0000000000000000 R11: 0000000000000000 R12: 00007fac2d8f0000 11月 27 15:13:36 ZHAN66 kernel: R13: 0000000000000000 R14: fffff1cf8a86d200 R15: ffff987f48994af0 11月 27 15:13:36 ZHAN66 kernel: FS: 00007fac28a23e40(0000) GS:ffff98823f500000(0000) knlGS:0000000000000000 11月 27 15:13:36 ZHAN66 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 11月 27 15:13:36 ZHAN66 kernel: CR2: 00007fac2d8f0c60 CR3: 000000010b950000 CR4: 0000000000350ee0 11月 27 15:13:36 ZHAN66 kernel: Call Trace: 11月 27 15:13:36 ZHAN66 kernel: <TASK> 11月 27 15:13:36 ZHAN66 kernel: _raw_spin_lock+0x21/0x30 11月 27 15:13:36 ZHAN66 kernel: filemap_map_pages+0x2f6/0x690 11月 27 15:13:36 ZHAN66 kernel: __handle_mm_fault+0xcbd/0x1550 11月 27 15:13:36 ZHAN66 kernel: ? _copy_to_user+0x1c/0x30 11月 27 15:13:36 ZHAN66 kernel: handle_mm_fault+0xb2/0x280 11月 27 15:13:36 ZHAN66 kernel: do_user_addr_fault+0x1ba/0x690 11月 27 15:13:36 ZHAN66 kernel: ? do_syscall_64+0x69/0x80 11月 27 15:13:36 ZHAN66 kernel: exc_page_fault+0x68/0x150 11月 27 15:13:36 ZHAN66 kernel: ? asm_exc_page_fault+0x8/0x30 11月 27 15:13:36 ZHAN66 kernel: asm_exc_page_fault+0x1e/0x30 11月 27 15:13:36 ZHAN66 kernel: RIP: 0033:0x7fac2d8f0c60 11月 27 15:13:36 ZHAN66 kernel: Code: Unable to access opcode bytes at RIP 0x7fac2d8f0c36. 11月 27 15:13:36 ZHAN66 kernel: RSP: 002b:00007fff1c421988 EFLAGS: 00010206 11月 27 15:13:36 ZHAN66 kernel: RAX: 0000000000000001 RBX: 000055bed54aecb8 RCX: 000055bed54ce290 11月 27 15:13:36 ZHAN66 kernel: RDX: 000055bed54ce290 RSI: 000055bed7361ca8 RDI: 000055bed7315ba0 11月 27 15:13:36 ZHAN66 kernel: RBP: 000055bed7315ba0 R08: 0000000000000000 R09: 00007fac2b71f620 11月 27 15:13:36 ZHAN66 kernel: R10: 00007fff1c4a7080 R11: 9a5279bc9b9622a2 R12: 000055bed54aecc8 11月 27 15:13:36 ZHAN66 kernel: R13: 000055bed75d6980 R14: 000055bed55d58b0 R15: 00007fff1c421a40 11月 27 15:13:36 ZHAN66 kernel: </TASK> 11月 27 15:13:39 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:39 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:39 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-fake-input-client-protocol.h" 11月 27 15:13:43 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:43 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:43 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-blur-client-protocol.h" 11月 27 15:13:46 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:46 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:46 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-dpms-server-protocol.h" -- Boot 2c685d4adc43478f9350816f24a67c6d -- ```
It seems after updating to linux-next-20211125, my system is crashing frequently due to "kernel BUG at mm/page_table_check.c:101". linux-next-20211124 does not have the issue. A bug was also reported on https://bugzilla.opensuse.org/show_bug.cgi?id=1193125 journactl output before sysrq reboot: ``` 11月 27 15:13:10 ZHAN66 kernel: ------------[ cut here ]------------ 11月 27 15:13:10 ZHAN66 kernel: kernel BUG at mm/page_table_check.c:101! 11月 27 15:13:10 ZHAN66 kernel: invalid opcode: 0000 [#1] PREEMPT SMP NOPTI 11月 27 15:13:10 ZHAN66 kernel: CPU: 0 PID: 75 Comm: kcompactd0 Not tainted 5.16.0-rc2-next-20211125-1.ga5a7188-vanilla #1 3000d4f4dc38a6eb529f948e10865da4957e57dc 11月 27 15:13:10 ZHAN66 kernel: Hardware name: HP HP ZHAN 66 Pro A 14 G3/876B, BIOS S81 Ver. 01.03.01 10/23/2020 11月 27 15:13:10 ZHAN66 kernel: RIP: 0010:page_table_check_clear.part.0+0xbb/0xd0 11月 27 15:13:10 ZHAN66 kernel: Code: d8 0f 0b f7 c3 ff 0f 00 00 75 97 48 8b 13 f7 c2 00 00 01 00 74 8c 48 8b 53 48 4c 8d 62 ff 83 e2 01 4c 0f 44 e3 e9 78 ff ff ff <0f> 0b 0f 0b 0f 0b 5b 5d 41 5c c3 66 2e 0f 1f 84 00 00 00 00 00 0f 11月 27 15:13:10 ZHAN66 kernel: RSP: 0018:ffffb784403e7a80 EFLAGS: 00010202 11月 27 15:13:10 ZHAN66 kernel: RAX: ffff987f419362e0 RBX: fffff1cf842d8b80 RCX: 0000000000000000 11月 27 15:13:10 ZHAN66 kernel: RDX: ffff987f419362e8 RSI: 0000000000000001 RDI: 0000000000000001 11月 27 15:13:10 ZHAN66 kernel: RBP: 0000000000000001 R08: 00000000ffffffff R09: 0000000000000825 11月 27 15:13:10 ZHAN66 kernel: R10: 0000000000000067 R11: 000000000003a878 R12: fffff1cf842d8b80 11月 27 15:13:10 ZHAN66 kernel: R13: ffff987f468e9100 R14: ffff98801df1e960 R15: 03ffffffffffffff 11月 27 15:13:10 ZHAN66 kernel: FS: 0000000000000000(0000) GS:ffff98823f400000(0000) knlGS:0000000000000000 11月 27 15:13:10 ZHAN66 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 11月 27 15:13:10 ZHAN66 kernel: CR2: 00007f9b8591bd20 CR3: 0000000161d0c000 CR4: 0000000000350ef0 11月 27 15:13:10 ZHAN66 kernel: Call Trace: 11月 27 15:13:10 ZHAN66 kernel: <TASK> 11月 27 15:13:10 ZHAN66 kernel: ptep_clear_flush+0x7e/0x80 11月 27 15:13:10 ZHAN66 kernel: try_to_migrate_one+0x1b5/0x9e0 11月 27 15:13:10 ZHAN66 kernel: ? __mod_memcg_lruvec_state+0x41/0x80 11月 27 15:13:10 ZHAN66 kernel: rmap_walk_anon+0x121/0x270 11月 27 15:13:10 ZHAN66 kernel: try_to_migrate+0x129/0x1c0 11月 27 15:13:10 ZHAN66 kernel: ? try_to_unmap_one+0x1010/0x1010 11月 27 15:13:10 ZHAN66 kernel: ? anon_vma_ctor+0x40/0x40 11月 27 15:13:10 ZHAN66 kernel: ? page_get_anon_vma+0xc0/0xc0 11月 27 15:13:10 ZHAN66 kernel: ? invalid_mkclean_vma+0x20/0x20 11月 27 15:13:10 ZHAN66 kernel: migrate_pages+0x10f3/0x16e0 11月 27 15:13:10 ZHAN66 kernel: ? isolate_freepages_block+0x460/0x460 11月 27 15:13:10 ZHAN66 kernel: ? move_freelist_tail+0xc0/0xc0 11月 27 15:13:10 ZHAN66 kernel: ? migrate_page+0xe0/0xe0 11月 27 15:13:10 ZHAN66 kernel: compact_zone+0x5ec/0xe70 11月 27 15:13:10 ZHAN66 kernel: ? finish_task_switch.isra.0+0xb4/0x2c0 11月 27 15:13:10 ZHAN66 kernel: proactive_compact_node+0x88/0xc0 11月 27 15:13:10 ZHAN66 kernel: kcompactd+0x1c4/0x410 11月 27 15:13:10 ZHAN66 kernel: ? wait_woken+0x70/0x70 11月 27 15:13:10 ZHAN66 kernel: ? kcompactd_do_work+0x290/0x290 11月 27 15:13:10 ZHAN66 kernel: kthread+0x15a/0x180 11月 27 15:13:10 ZHAN66 kernel: ? set_kthread_struct+0x40/0x40 11月 27 15:13:10 ZHAN66 kernel: ret_from_fork+0x1f/0x30 11月 27 15:13:10 ZHAN66 kernel: </TASK> 11月 27 15:13:10 ZHAN66 kernel: Modules linked in: uinput rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device af_packet r8153_ecm cdc_ether usbnet cmac algif_hash algif_skcipher af_alg nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib r8152 mii nft_reject_inet nf_reje> 11月 27 15:13:10 ZHAN66 kernel: snd_hda_core snd_compress snd_pcm_dmaengine snd_pci_acp6x snd_hwdep snd_pcm cfg80211 r8169 snd_timer ucsi_acpi snd realtek typec_ucsi snd_pci_acp5x mdio_devres snd_rn_pci_acp3x typec soundcore snd_pci_acp3x libphy roles rfkill nls_iso88> 11月 27 15:13:10 ZHAN66 kernel: ---[ end trace 7dff3b4592ed7de0 ]--- 11月 27 15:13:10 ZHAN66 kernel: RIP: 0010:page_table_check_clear.part.0+0xbb/0xd0 11月 27 15:13:10 ZHAN66 kernel: Code: d8 0f 0b f7 c3 ff 0f 00 00 75 97 48 8b 13 f7 c2 00 00 01 00 74 8c 48 8b 53 48 4c 8d 62 ff 83 e2 01 4c 0f 44 e3 e9 78 ff ff ff <0f> 0b 0f 0b 0f 0b 5b 5d 41 5c c3 66 2e 0f 1f 84 00 00 00 00 00 0f 11月 27 15:13:10 ZHAN66 kernel: RSP: 0018:ffffb784403e7a80 EFLAGS: 00010202 11月 27 15:13:10 ZHAN66 kernel: RAX: ffff987f419362e0 RBX: fffff1cf842d8b80 RCX: 0000000000000000 11月 27 15:13:10 ZHAN66 kernel: RDX: ffff987f419362e8 RSI: 0000000000000001 RDI: 0000000000000001 11月 27 15:13:10 ZHAN66 kernel: RBP: 0000000000000001 R08: 00000000ffffffff R09: 0000000000000825 11月 27 15:13:10 ZHAN66 kernel: R10: 0000000000000067 R11: 000000000003a878 R12: fffff1cf842d8b80 11月 27 15:13:10 ZHAN66 kernel: R13: ffff987f468e9100 R14: ffff98801df1e960 R15: 03ffffffffffffff 11月 27 15:13:10 ZHAN66 kernel: FS: 0000000000000000(0000) GS:ffff98823f400000(0000) knlGS:0000000000000000 11月 27 15:13:10 ZHAN66 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 11月 27 15:13:10 ZHAN66 kernel: CR2: 00007f9b8591bd20 CR3: 0000000161d0c000 CR4: 0000000000350ef0 11月 27 15:13:10 ZHAN66 kernel: note: kcompactd0[75] exited with preempt_count 1 11月 27 15:13:13 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:13 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:13 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-contrast-client-protocol.h" 11月 27 15:13:15 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:15 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:15 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-blur-server-protocol.h" 11月 27 15:13:22 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:22 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:22 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-slide-client-protocol.h" 11月 27 15:13:30 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:30 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:30 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-shadow-client-protocol.h" 11月 27 15:13:33 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:33 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:33 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-fake-input-server-protocol.h" 11月 27 15:13:36 ZHAN66 kernel: watchdog: BUG: soft lockup - CPU#4 stuck for 22s! [plasmashell:6294] 11月 27 15:13:36 ZHAN66 kernel: Modules linked in: uinput rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device af_packet r8153_ecm cdc_ether usbnet cmac algif_hash algif_skcipher af_alg nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib r8152 mii nft_reject_inet nf_reje> 11月 27 15:13:36 ZHAN66 kernel: snd_hda_core snd_compress snd_pcm_dmaengine snd_pci_acp6x snd_hwdep snd_pcm cfg80211 r8169 snd_timer ucsi_acpi snd realtek typec_ucsi snd_pci_acp5x mdio_devres snd_rn_pci_acp3x typec soundcore snd_pci_acp3x libphy roles rfkill nls_iso88> 11月 27 15:13:36 ZHAN66 kernel: CPU: 4 PID: 6294 Comm: plasmashell Tainted: G D 5.16.0-rc2-next-20211125-1.ga5a7188-vanilla #1 3000d4f4dc38a6eb529f948e10865da4957e57dc 11月 27 15:13:36 ZHAN66 kernel: Hardware name: HP HP ZHAN 66 Pro A 14 G3/876B, BIOS S81 Ver. 01.03.01 10/23/2020 11月 27 15:13:36 ZHAN66 kernel: RIP: 0010:native_queued_spin_lock_slowpath+0x5c/0x1d0 11月 27 15:13:36 ZHAN66 kernel: Code: 0f ba 2a 08 0f 92 c1 8b 02 0f b6 c9 c1 e1 08 30 e4 09 c8 a9 00 01 ff ff 0f 85 11 01 00 00 85 c0 74 0e 8b 02 84 c0 74 08 f3 90 <8b> 02 84 c0 75 f8 b8 01 00 00 00 66 89 02 c3 8b 37 b9 00 02 00 00 11月 27 15:13:36 ZHAN66 kernel: RSP: 0000:ffffb78441ca3d48 EFLAGS: 00000202 11月 27 15:13:36 ZHAN66 kernel: RAX: 0000000000000101 RBX: 0000000000000028 RCX: 0000000000000000 11月 27 15:13:36 ZHAN66 kernel: RDX: fffff1cf88a25ca8 RSI: 0000000000000000 RDI: fffff1cf88a25ca8 11月 27 15:13:36 ZHAN66 kernel: RBP: ffffb78441ca3e00 R08: 0000000000000028 R09: fffff1cf88a25ca8 11月 27 15:13:36 ZHAN66 kernel: R10: 0000000000000000 R11: 0000000000000000 R12: 00007fac2d8f0000 11月 27 15:13:36 ZHAN66 kernel: R13: 0000000000000000 R14: fffff1cf8a86d200 R15: ffff987f48994af0 11月 27 15:13:36 ZHAN66 kernel: FS: 00007fac28a23e40(0000) GS:ffff98823f500000(0000) knlGS:0000000000000000 11月 27 15:13:36 ZHAN66 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 11月 27 15:13:36 ZHAN66 kernel: CR2: 00007fac2d8f0c60 CR3: 000000010b950000 CR4: 0000000000350ee0 11月 27 15:13:36 ZHAN66 kernel: Call Trace: 11月 27 15:13:36 ZHAN66 kernel: <TASK> 11月 27 15:13:36 ZHAN66 kernel: _raw_spin_lock+0x21/0x30 11月 27 15:13:36 ZHAN66 kernel: filemap_map_pages+0x2f6/0x690 11月 27 15:13:36 ZHAN66 kernel: __handle_mm_fault+0xcbd/0x1550 11月 27 15:13:10 ZHAN66 kernel: compact_zone+0x5ec/0xe70 11月 27 15:13:10 ZHAN66 kernel: ? finish_task_switch.isra.0+0xb4/0x2c0 11月 27 15:13:10 ZHAN66 kernel: proactive_compact_node+0x88/0xc0 11月 27 15:13:10 ZHAN66 kernel: kcompactd+0x1c4/0x410 11月 27 15:13:10 ZHAN66 kernel: ? wait_woken+0x70/0x70 11月 27 15:13:10 ZHAN66 kernel: ? kcompactd_do_work+0x290/0x290 11月 27 15:13:10 ZHAN66 kernel: kthread+0x15a/0x180 11月 27 15:13:10 ZHAN66 kernel: ? set_kthread_struct+0x40/0x40 11月 27 15:13:10 ZHAN66 kernel: ret_from_fork+0x1f/0x30 11月 27 15:13:10 ZHAN66 kernel: </TASK> 11月 27 15:13:10 ZHAN66 kernel: Modules linked in: uinput rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device af_packet r8153_ecm cdc_ether usbnet cmac algif_hash algif_skcipher af_alg nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib r8152 mii nft_reject_inet nf_reje> 11月 27 15:13:10 ZHAN66 kernel: snd_hda_core snd_compress snd_pcm_dmaengine snd_pci_acp6x snd_hwdep snd_pcm cfg80211 r8169 snd_timer ucsi_acpi snd realtek typec_ucsi snd_pci_acp5x mdio_devres snd_rn_pci_acp3x typec soundcore snd_pci_acp3x libphy roles rfkill nls_iso88> 11月 27 15:13:10 ZHAN66 kernel: ---[ end trace 7dff3b4592ed7de0 ]--- 11月 27 15:13:10 ZHAN66 kernel: RIP: 0010:page_table_check_clear.part.0+0xbb/0xd0 11月 27 15:13:10 ZHAN66 kernel: Code: d8 0f 0b f7 c3 ff 0f 00 00 75 97 48 8b 13 f7 c2 00 00 01 00 74 8c 48 8b 53 48 4c 8d 62 ff 83 e2 01 4c 0f 44 e3 e9 78 ff ff ff <0f> 0b 0f 0b 0f 0b 5b 5d 41 5c c3 66 2e 0f 1f 84 00 00 00 00 00 0f 11月 27 15:13:10 ZHAN66 kernel: RSP: 0018:ffffb784403e7a80 EFLAGS: 00010202 11月 27 15:13:10 ZHAN66 kernel: RAX: ffff987f419362e0 RBX: fffff1cf842d8b80 RCX: 0000000000000000 11月 27 15:13:10 ZHAN66 kernel: RDX: ffff987f419362e8 RSI: 0000000000000001 RDI: 0000000000000001 11月 27 15:13:10 ZHAN66 kernel: RBP: 0000000000000001 R08: 00000000ffffffff R09: 0000000000000825 11月 27 15:13:10 ZHAN66 kernel: R10: 0000000000000067 R11: 000000000003a878 R12: fffff1cf842d8b80 11月 27 15:13:10 ZHAN66 kernel: R13: ffff987f468e9100 R14: ffff98801df1e960 R15: 03ffffffffffffff 11月 27 15:13:10 ZHAN66 kernel: FS: 0000000000000000(0000) GS:ffff98823f400000(0000) knlGS:0000000000000000 11月 27 15:13:10 ZHAN66 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 11月 27 15:13:10 ZHAN66 kernel: CR2: 00007f9b8591bd20 CR3: 0000000161d0c000 CR4: 0000000000350ef0 11月 27 15:13:10 ZHAN66 kernel: note: kcompactd0[75] exited with preempt_count 1 11月 27 15:13:13 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:13 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:13 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-contrast-client-protocol.h" 11月 27 15:13:15 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:15 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:15 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-blur-server-protocol.h" 11月 27 15:13:22 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:22 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:22 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-slide-client-protocol.h" 11月 27 15:13:30 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:30 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:30 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-shadow-client-protocol.h" 11月 27 15:13:33 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:33 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:33 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-fake-input-server-protocol.h" 11月 27 15:13:36 ZHAN66 kernel: watchdog: BUG: soft lockup - CPU#4 stuck for 22s! [plasmashell:6294] 11月 27 15:13:36 ZHAN66 kernel: Modules linked in: uinput rfcomm snd_seq_dummy snd_hrtimer snd_seq snd_seq_device af_packet r8153_ecm cdc_ether usbnet cmac algif_hash algif_skcipher af_alg nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib r8152 mii nft_reject_inet nf_reje> 11月 27 15:13:36 ZHAN66 kernel: snd_hda_core snd_compress snd_pcm_dmaengine snd_pci_acp6x snd_hwdep snd_pcm cfg80211 r8169 snd_timer ucsi_acpi snd realtek typec_ucsi snd_pci_acp5x mdio_devres snd_rn_pci_acp3x typec soundcore snd_pci_acp3x libphy roles rfkill nls_iso88> 11月 27 15:13:36 ZHAN66 kernel: CPU: 4 PID: 6294 Comm: plasmashell Tainted: G D 5.16.0-rc2-next-20211125-1.ga5a7188-vanilla #1 3000d4f4dc38a6eb529f948e10865da4957e57dc 11月 27 15:13:36 ZHAN66 kernel: Hardware name: HP HP ZHAN 66 Pro A 14 G3/876B, BIOS S81 Ver. 01.03.01 10/23/2020 11月 27 15:13:36 ZHAN66 kernel: RIP: 0010:native_queued_spin_lock_slowpath+0x5c/0x1d0 11月 27 15:13:36 ZHAN66 kernel: Code: 0f ba 2a 08 0f 92 c1 8b 02 0f b6 c9 c1 e1 08 30 e4 09 c8 a9 00 01 ff ff 0f 85 11 01 00 00 85 c0 74 0e 8b 02 84 c0 74 08 f3 90 <8b> 02 84 c0 75 f8 b8 01 00 00 00 66 89 02 c3 8b 37 b9 00 02 00 00 11月 27 15:13:36 ZHAN66 kernel: RSP: 0000:ffffb78441ca3d48 EFLAGS: 00000202 11月 27 15:13:36 ZHAN66 kernel: RAX: 0000000000000101 RBX: 0000000000000028 RCX: 0000000000000000 11月 27 15:13:36 ZHAN66 kernel: RDX: fffff1cf88a25ca8 RSI: 0000000000000000 RDI: fffff1cf88a25ca8 11月 27 15:13:36 ZHAN66 kernel: RBP: ffffb78441ca3e00 R08: 0000000000000028 R09: fffff1cf88a25ca8 11月 27 15:13:36 ZHAN66 kernel: R10: 0000000000000000 R11: 0000000000000000 R12: 00007fac2d8f0000 11月 27 15:13:36 ZHAN66 kernel: R13: 0000000000000000 R14: fffff1cf8a86d200 R15: ffff987f48994af0 11月 27 15:13:36 ZHAN66 kernel: FS: 00007fac28a23e40(0000) GS:ffff98823f500000(0000) knlGS:0000000000000000 11月 27 15:13:36 ZHAN66 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 11月 27 15:13:36 ZHAN66 kernel: CR2: 00007fac2d8f0c60 CR3: 000000010b950000 CR4: 0000000000350ee0 11月 27 15:13:36 ZHAN66 kernel: Call Trace: 11月 27 15:13:36 ZHAN66 kernel: <TASK> 11月 27 15:13:36 ZHAN66 kernel: _raw_spin_lock+0x21/0x30 11月 27 15:13:36 ZHAN66 kernel: filemap_map_pages+0x2f6/0x690 11月 27 15:13:36 ZHAN66 kernel: __handle_mm_fault+0xcbd/0x1550 11月 27 15:13:36 ZHAN66 kernel: ? _copy_to_user+0x1c/0x30 11月 27 15:13:36 ZHAN66 kernel: handle_mm_fault+0xb2/0x280 11月 27 15:13:36 ZHAN66 kernel: do_user_addr_fault+0x1ba/0x690 11月 27 15:13:36 ZHAN66 kernel: ? do_syscall_64+0x69/0x80 11月 27 15:13:36 ZHAN66 kernel: exc_page_fault+0x68/0x150 11月 27 15:13:36 ZHAN66 kernel: ? asm_exc_page_fault+0x8/0x30 11月 27 15:13:36 ZHAN66 kernel: asm_exc_page_fault+0x1e/0x30 11月 27 15:13:36 ZHAN66 kernel: RIP: 0033:0x7fac2d8f0c60 11月 27 15:13:36 ZHAN66 kernel: Code: Unable to access opcode bytes at RIP 0x7fac2d8f0c36. 11月 27 15:13:36 ZHAN66 kernel: RSP: 002b:00007fff1c421988 EFLAGS: 00010206 11月 27 15:13:36 ZHAN66 kernel: RAX: 0000000000000001 RBX: 000055bed54aecb8 RCX: 000055bed54ce290 11月 27 15:13:36 ZHAN66 kernel: RDX: 000055bed54ce290 RSI: 000055bed7361ca8 RDI: 000055bed7315ba0 11月 27 15:13:36 ZHAN66 kernel: RBP: 000055bed7315ba0 R08: 0000000000000000 R09: 00007fac2b71f620 11月 27 15:13:36 ZHAN66 kernel: R10: 00007fff1c4a7080 R11: 9a5279bc9b9622a2 R12: 000055bed54aecc8 11月 27 15:13:36 ZHAN66 kernel: R13: 000055bed75d6980 R14: 000055bed55d58b0 R15: 00007fff1c421a40 11月 27 15:13:36 ZHAN66 kernel: </TASK> 11月 27 15:13:39 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:39 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:39 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-fake-input-client-protocol.h" 11月 27 15:13:43 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:43 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:43 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-blur-client-protocol.h" 11月 27 15:13:46 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: clang_parseTranslationUnit2 return with error code 4 11月 27 15:13:46 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: (start KDevelop with `KDEV_CLANG_DISPLAY_DIAGS=1 kdevelop` to see more diagnostics) 11月 27 15:13:46 ZHAN66 kdevelop[3039]: kdevelop.plugins.clang: Failed to parse translation unit: "/home/qydw/文档/osc/KDE/kwayland/build/src/server/wayland-dpms-server-protocol.h" -- Boot 2c685d4adc43478f9350816f24a67c6d -- ```
On Sat, Nov 27, 2021 at 3:41 AM Fusion Future <qydwhotmail@gmail.com> wrote: > > It seems after updating to linux-next-20211125, my system is crashing > frequently due to "kernel BUG at mm/page_table_check.c:101". Thank you for reporting this issue: 99 if (anon) { 100 BUG_ON(atomic_read(&ptc->file_map_count)); 101 BUG_ON(atomic_dec_return(&ptc->anon_map_count) < 0); This BUG_ON checks that during unmap anon map counter (cleared in ptep_clear_flush()) does not become negative. If it becomes negative it means that we missed accounting for this anon mapping during set_pte(). Is there a config and environment that I could use to repro this problem? Thank you, Pasha
Here is the config: https://pastebin.com/AsLukrbE I can't stably reproduce the bug, but it seems it's likely to happen when a music is playing in the background or there is a file operation. I encountered it again on linux-next-20211126 when I was trying to extract a rar file, and the sound is constantly repeating when my system freezes, but nothing useful in journalctl.
I ran journalctl -kf to see what happened when my system freezed. There are "IPV6 table full" error messages and khugepaged constantly reporting RIPs. So it could be when memory consumption is over a certain percent, the bug will be triggered.
> So it could be when memory consumption is over a certain percent, the bug will be triggered.
Bisected and at the commit "[04ce8955fbe4d84376b92b875c42942489fcf3c5]
mm: page table check", the system still doesn't encounter any freezes.
So it's not this commit that introduces the bug. Sorry for bothering.
On Sun, Nov 28, 2021 at 11:54 AM Fusion Future <qydwhotmail@gmail.com> wrote: > > > So it could be when memory consumption is over a certain percent, the bug will be triggered. > > Bisected and at the commit "[04ce8955fbe4d84376b92b875c42942489fcf3c5] > mm: page table check", the system still doesn't encounter any freezes. > So it's not this commit that introduces the bug. Sorry for bothering. This commit by itself would not cause the freeze or BUG_ON(), but the next commit which enables it on x86 arch might. Pasha
On 2021/11/29 00:57, Pasha Tatashin wrote: > This commit by itself would not cause the freeze or BUG_ON(), but the > next commit which enables it on x86 arch might. Yes, you are right. At the commit "[1e67abff1820489435aad3fcf258708c21c283ef] x86: mm: add x86_64 support for page table check" my system starts to experience the freeze. I can now reproduce the freeze by following the steps below: 1. Open 20 YouTube video pages, and a YouTube Music page. 2. Play music in the background. (The step can be omitted) 3. Run `git clone https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git ln` git will never successfully clone the repo because the system will freeze during the operation. I also tried adding `page_table_check=off` to the boot option but still experienced the freeze. Perhaps the option is of no use.
On Sun, Nov 28, 2021 at 9:57 PM Fusion Future <qydwhotmail@gmail.com> wrote: > > On 2021/11/29 00:57, Pasha Tatashin wrote: > > This commit by itself would not cause the freeze or BUG_ON(), but the > > next commit which enables it on x86 arch might. > > Yes, you are right. At the commit > "[1e67abff1820489435aad3fcf258708c21c283ef] x86: mm: add x86_64 support > for page table check" my system starts to experience the freeze. > > I can now reproduce the freeze by following the steps below: > > 1. Open 20 YouTube video pages, and a YouTube Music page. > 2. Play music in the background. (The step can be omitted) > 3. Run `git clone > https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git ln` Thanks, I found a reliable way to reproduce this problem on my workstation: reduce the amount of physical memory to 4G via memmap kernel parameter, and use a script that starts chrome browser with 20 tabs each pointing to a youtube.com page. I will send an update after root cause. > git will never successfully clone the repo because the system will > freeze during the operation. > > I also tried adding `page_table_check=off` to the boot option but still I will add support for page_table_check=off even when CONFIG_PAGE_TABLE_CHECK_ENFORCED is set Thanks, Pasha
On 23. 11. 21, 22:48, Pasha Tatashin wrote: > Check user page table entries at the time they are added and removed. > > Allows to synchronously catch memory corruption issues related to > double mapping. > > When a pte for an anonymous page is added into page table, we verify > that this pte does not already point to a file backed page, and vice > versa if this is a file backed page that is being added we verify that > this page does not have an anonymous mapping > > We also enforce that read-only sharing for anonymous pages is allowed > (i.e. cow after fork). All other sharing must be for file pages. > > Page table check allows to protect and debug cases where "struct page" > metadata became corrupted for some reason. For example, when refcnt or > mapcount become invalid. > > Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com> ... > --- a/mm/Kconfig.debug > +++ b/mm/Kconfig.debug > @@ -62,6 +62,30 @@ config PAGE_OWNER > > If unsure, say N. > > +config PAGE_TABLE_CHECK > + bool "Check for invalid mappings in user page tables" > + depends on ARCH_SUPPORTS_PAGE_TABLE_CHECK > + select PAGE_EXTENSION > + help > + Check that anonymous page is not being mapped twice with read write > + permissions. Check that anonymous and file pages are not being > + erroneously shared. Since the checking is performed at the time > + entries are added and removed to user page tables, leaking, corruption > + and double mapping problems are detected synchronously. > + > + If unsure say "n". > + > +config PAGE_TABLE_CHECK_ENFORCED > + bool "Enforce the page table checking by defauled" s/defauled/default/ regards,
diff --git a/Documentation/vm/index.rst b/Documentation/vm/index.rst index 6f5ffef4b716..43bb54d897d9 100644 --- a/Documentation/vm/index.rst +++ b/Documentation/vm/index.rst @@ -31,6 +31,7 @@ algorithms. If you are looking for advice on simply allocating memory, see the page_migration page_frags page_owner + page_table_check remap_file_pages slub split_page_table_lock diff --git a/Documentation/vm/page_table_check.rst b/Documentation/vm/page_table_check.rst new file mode 100644 index 000000000000..51d2e273d345 --- /dev/null +++ b/Documentation/vm/page_table_check.rst @@ -0,0 +1,56 @@ +.. SPDX-License-Identifier: GPL-2.0 + +.. _page_table_check: + +================ +Page Table Check +================ + +Introduction +============ + +Page table check allows to hardern the kernel by ensuring that some types of +the memory corruptions are prevented. + +Page table check performs extra verifications at the time when new pages become +accessible from the userspace by getting their page table entries (PTEs PMDs +etc.) added into the table. + +In case of detected corruption, the kernel is crashed. There is a small +performance and memory overhead associated with the page table check. Therefore, +it is disabled by default, but can be optionally be enabled on systems where +the extra hardening outweighs the performance costs. Also, because page table +check is synchronous, it can help with debugging double map memory corruption +issues, by crashing kernel at the time wrong mapping occurs instead of later +which is often the case with memory corruptions bugs. + +Double mapping detection logic +============================== + ++-------------------+-------------------+-------------------+------------------+ +| Current Mapping | New mapping | Permissions | Rule | ++===================+===================+===================+==================+ +| Anonymous | Anonymous | Read | Allow | ++-------------------+-------------------+-------------------+------------------+ +| Anonymous | Anonymous | Read / Write | Prohibit | ++-------------------+-------------------+-------------------+------------------+ +| Anonymous | Named | Any | Prohibit | ++-------------------+-------------------+-------------------+------------------+ +| Named | Anonymous | Any | Prohibit | ++-------------------+-------------------+-------------------+------------------+ +| Named | Named | Any | Allow | ++-------------------+-------------------+-------------------+------------------+ + +Enabling Page Table Check +========================= + +Build kernel with: + +- PAGE_TABLE_CHECK=y + Note, it can only be enabled on platforms where ARCH_SUPPORTS_PAGE_TABLE_CHECK + is available. + +- Boot with 'page_table_check=on' kernel parameter. + +Optionally, build kernel with PAGE_TABLE_CHECK_ENFORCED in order to have page +table support without extra kernel parameter. diff --git a/MAINTAINERS b/MAINTAINERS index ab0d25f01ee3..69cc753799d6 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -14421,6 +14421,15 @@ F: include/net/page_pool.h F: include/trace/events/page_pool.h F: net/core/page_pool.c +PAGE TABLE CHECK +M: Pasha Tatashin <pasha.tatashin@soleen.com> +M: Andrew Morton <akpm@linux-foundation.org> +L: linux-mm@kvack.org +S: Maintained +F: Documentation/vm/page_table_check.rst +F: include/linux/page_table_check.h +F: mm/page_table_check.c + PANASONIC LAPTOP ACPI EXTRAS DRIVER M: Kenneth Chan <kenneth.t.chan@gmail.com> L: platform-driver-x86@vger.kernel.org diff --git a/arch/Kconfig b/arch/Kconfig index 26b8ed11639d..c5b03b3bd62d 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -1287,6 +1287,9 @@ config HAVE_ARCH_PFN_VALID config ARCH_SUPPORTS_DEBUG_PAGEALLOC bool +config ARCH_SUPPORTS_PAGE_TABLE_CHECK + bool + config ARCH_SPLIT_ARG64 bool help diff --git a/include/linux/page_table_check.h b/include/linux/page_table_check.h new file mode 100644 index 000000000000..38cace1da7b6 --- /dev/null +++ b/include/linux/page_table_check.h @@ -0,0 +1,147 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +/* + * Copyright (c) 2021, Google LLC. + * Pasha Tatashin <pasha.tatashin@soleen.com> + */ +#ifndef __LINUX_PAGE_TABLE_CHECK_H +#define __LINUX_PAGE_TABLE_CHECK_H + +#ifdef CONFIG_PAGE_TABLE_CHECK +#include <linux/jump_label.h> + +extern struct static_key_true page_table_check_disabled; +extern struct page_ext_operations page_table_check_ops; + +void __page_table_check_zero(struct page *page, unsigned int order); +void __page_table_check_pte_clear(struct mm_struct *mm, unsigned long addr, + pte_t pte); +void __page_table_check_pmd_clear(struct mm_struct *mm, unsigned long addr, + pmd_t pmd); +void __page_table_check_pud_clear(struct mm_struct *mm, unsigned long addr, + pud_t pud); +void __page_table_check_pte_set(struct mm_struct *mm, unsigned long addr, + pte_t *ptep, pte_t pte); +void __page_table_check_pmd_set(struct mm_struct *mm, unsigned long addr, + pmd_t *pmdp, pmd_t pmd); +void __page_table_check_pud_set(struct mm_struct *mm, unsigned long addr, + pud_t *pudp, pud_t pud); + +static inline void page_table_check_alloc(struct page *page, unsigned int order) +{ + if (static_branch_likely(&page_table_check_disabled)) + return; + + __page_table_check_zero(page, order); +} + +static inline void page_table_check_free(struct page *page, unsigned int order) +{ + if (static_branch_likely(&page_table_check_disabled)) + return; + + __page_table_check_zero(page, order); +} + +static inline void page_table_check_pte_clear(struct mm_struct *mm, + unsigned long addr, pte_t pte) +{ + if (static_branch_likely(&page_table_check_disabled)) + return; + + __page_table_check_pte_clear(mm, addr, pte); +} + +static inline void page_table_check_pmd_clear(struct mm_struct *mm, + unsigned long addr, pmd_t pmd) +{ + if (static_branch_likely(&page_table_check_disabled)) + return; + + __page_table_check_pmd_clear(mm, addr, pmd); +} + +static inline void page_table_check_pud_clear(struct mm_struct *mm, + unsigned long addr, pud_t pud) +{ + if (static_branch_likely(&page_table_check_disabled)) + return; + + __page_table_check_pud_clear(mm, addr, pud); +} + +static inline void page_table_check_pte_set(struct mm_struct *mm, + unsigned long addr, pte_t *ptep, + pte_t pte) +{ + if (static_branch_likely(&page_table_check_disabled)) + return; + + __page_table_check_pte_set(mm, addr, ptep, pte); +} + +static inline void page_table_check_pmd_set(struct mm_struct *mm, + unsigned long addr, pmd_t *pmdp, + pmd_t pmd) +{ + if (static_branch_likely(&page_table_check_disabled)) + return; + + __page_table_check_pmd_set(mm, addr, pmdp, pmd); +} + +static inline void page_table_check_pud_set(struct mm_struct *mm, + unsigned long addr, pud_t *pudp, + pud_t pud) +{ + if (static_branch_likely(&page_table_check_disabled)) + return; + + __page_table_check_pud_set(mm, addr, pudp, pud); +} + +#else + +static inline void page_table_check_alloc(struct page *page, unsigned int order) +{ +} + +static inline void page_table_check_free(struct page *page, unsigned int order) +{ +} + +static inline void page_table_check_pte_clear(struct mm_struct *mm, + unsigned long addr, pte_t pte) +{ +} + +static inline void page_table_check_pmd_clear(struct mm_struct *mm, + unsigned long addr, pmd_t pmd) +{ +} + +static inline void page_table_check_pud_clear(struct mm_struct *mm, + unsigned long addr, pud_t pud) +{ +} + +static inline void page_table_check_pte_set(struct mm_struct *mm, + unsigned long addr, pte_t *ptep, + pte_t pte) +{ +} + +static inline void page_table_check_pmd_set(struct mm_struct *mm, + unsigned long addr, pmd_t *pmdp, + pmd_t pmd) +{ +} + +static inline void page_table_check_pud_set(struct mm_struct *mm, + unsigned long addr, pud_t *pudp, + pud_t pud) +{ +} + +#endif /* CONFIG_PAGE_TABLE_CHECK */ +#endif /* __LINUX_PAGE_TABLE_CHECK_H */ diff --git a/mm/Kconfig.debug b/mm/Kconfig.debug index 1e73717802f8..e5724cd6946b 100644 --- a/mm/Kconfig.debug +++ b/mm/Kconfig.debug @@ -62,6 +62,30 @@ config PAGE_OWNER If unsure, say N. +config PAGE_TABLE_CHECK + bool "Check for invalid mappings in user page tables" + depends on ARCH_SUPPORTS_PAGE_TABLE_CHECK + select PAGE_EXTENSION + help + Check that anonymous page is not being mapped twice with read write + permissions. Check that anonymous and file pages are not being + erroneously shared. Since the checking is performed at the time + entries are added and removed to user page tables, leaking, corruption + and double mapping problems are detected synchronously. + + If unsure say "n". + +config PAGE_TABLE_CHECK_ENFORCED + bool "Enforce the page table checking by defauled" + depends on PAGE_TABLE_CHECK + help + Always enable page table checking. By default the page table checking + is disabled, and can be optionally enabled via page_table_check=on + kernel parameter. This config enforces that page table check is always + enabled. + + If unsure say "n". + config PAGE_POISONING bool "Poison pages after freeing" help diff --git a/mm/Makefile b/mm/Makefile index d6c0042e3aa0..5c5a3a480fa6 100644 --- a/mm/Makefile +++ b/mm/Makefile @@ -112,6 +112,7 @@ obj-$(CONFIG_GENERIC_EARLY_IOREMAP) += early_ioremap.o obj-$(CONFIG_CMA) += cma.o obj-$(CONFIG_MEMORY_BALLOON) += balloon_compaction.o obj-$(CONFIG_PAGE_EXTENSION) += page_ext.o +obj-$(CONFIG_PAGE_TABLE_CHECK) += page_table_check.o obj-$(CONFIG_CMA_DEBUGFS) += cma_debug.o obj-$(CONFIG_SECRETMEM) += secretmem.o obj-$(CONFIG_CMA_SYSFS) += cma_sysfs.o diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 58490fa8948d..1a90a3cf8ef9 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -64,6 +64,7 @@ #include <linux/sched/rt.h> #include <linux/sched/mm.h> #include <linux/page_owner.h> +#include <linux/page_table_check.h> #include <linux/kthread.h> #include <linux/memcontrol.h> #include <linux/ftrace.h> @@ -1298,6 +1299,7 @@ static __always_inline bool free_pages_prepare(struct page *page, if (memcg_kmem_enabled() && PageMemcgKmem(page)) __memcg_kmem_uncharge_page(page, order); reset_page_owner(page, order); + page_table_check_free(page, order); return false; } @@ -1337,6 +1339,7 @@ static __always_inline bool free_pages_prepare(struct page *page, page_cpupid_reset_last(page); page->flags &= ~PAGE_FLAGS_CHECK_AT_PREP; reset_page_owner(page, order); + page_table_check_free(page, order); if (!PageHighMem(page)) { debug_check_no_locks_freed(page_address(page), @@ -2411,6 +2414,7 @@ inline void post_alloc_hook(struct page *page, unsigned int order, } set_page_owner(page, order, gfp_flags); + page_table_check_alloc(page, order); } static void prep_new_page(struct page *page, unsigned int order, gfp_t gfp_flags, diff --git a/mm/page_ext.c b/mm/page_ext.c index 6242afb24d84..bee3240604dc 100644 --- a/mm/page_ext.c +++ b/mm/page_ext.c @@ -8,6 +8,7 @@ #include <linux/kmemleak.h> #include <linux/page_owner.h> #include <linux/page_idle.h> +#include <linux/page_table_check.h> /* * struct page extension @@ -75,6 +76,9 @@ static struct page_ext_operations *page_ext_ops[] = { #if defined(CONFIG_PAGE_IDLE_FLAG) && !defined(CONFIG_64BIT) &page_idle_ops, #endif +#ifdef CONFIG_PAGE_TABLE_CHECK + &page_table_check_ops, +#endif }; unsigned long page_ext_size = sizeof(struct page_ext); diff --git a/mm/page_table_check.c b/mm/page_table_check.c new file mode 100644 index 000000000000..06f1c9e0a62a --- /dev/null +++ b/mm/page_table_check.c @@ -0,0 +1,261 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* + * Copyright (c) 2021, Google LLC. + * Pasha Tatashin <pasha.tatashin@soleen.com> + */ +#include <linux/mm.h> +#include <linux/page_table_check.h> + +#undef pr_fmt +#define pr_fmt(fmt) "page_table_check: " fmt + +struct page_table_check { + atomic_t anon_map_count; + atomic_t file_map_count; +}; + +static bool __page_table_check_enabled __initdata = + IS_ENABLED(CONFIG_PAGE_TABLE_CHECK_ENFORCED); + +DEFINE_STATIC_KEY_TRUE_RO(page_table_check_disabled); + +static int __init early_page_table_check_param(char *buf) +{ + if (!buf) + return -EINVAL; + + if (strcmp(buf, "on") == 0) + __page_table_check_enabled = true; + + return 0; +} + +early_param("page_table_check", early_page_table_check_param); + +static bool __init need_page_table_check(void) +{ + return __page_table_check_enabled; +} + +static void __init init_page_table_check(void) +{ + if (!__page_table_check_enabled) + return; + static_branch_disable(&page_table_check_disabled); +} + +struct page_ext_operations page_table_check_ops = { + .size = sizeof(struct page_table_check), + .need = need_page_table_check, + .init = init_page_table_check, +}; + +static struct page_table_check *get_page_table_check(struct page_ext *page_ext) +{ + BUG_ON(!page_ext); + return (void *)(page_ext) + page_table_check_ops.offset; +} + +static inline bool pte_user_accessible_page(pte_t pte) +{ + return (pte_val(pte) & _PAGE_PRESENT) && (pte_val(pte) & _PAGE_USER); +} + +static inline bool pmd_user_accessible_page(pmd_t pmd) +{ + return pmd_leaf(pmd) && (pmd_val(pmd) & _PAGE_PRESENT) && + (pmd_val(pmd) & _PAGE_USER); +} + +static inline bool pud_user_accessible_page(pud_t pud) +{ + return pud_leaf(pud) && (pud_val(pud) & _PAGE_PRESENT) && + (pud_val(pud) & _PAGE_USER); +} + +/* + * An enty is removed from the page table, decrement the counters for that page + * verify that it is of correct type and counters do not become negative. + */ +static void page_table_check_clear(struct mm_struct *mm, unsigned long addr, + unsigned long pfn, unsigned int pgcnt) +{ + struct page_ext *page_ext; + struct page *page; + bool anon; + int i; + + if (!pfn_valid(pfn)) + return; + + page = pfn_to_page(pfn); + page_ext = lookup_page_ext(page); + anon = PageAnon(page); + + for (i = 0; i < pgcnt; i++) { + struct page_table_check *ptc = get_page_table_check(page_ext); + + if (anon) { + BUG_ON(atomic_read(&ptc->file_map_count)); + BUG_ON(atomic_dec_return(&ptc->anon_map_count) < 0); + } else { + BUG_ON(atomic_read(&ptc->anon_map_count)); + BUG_ON(atomic_dec_return(&ptc->file_map_count) < 0); + } + page_ext = page_ext_next(page_ext); + } +} + +/* + * A new enty is added to the page table, increment the counters for that page + * verify that it is of correct type and is not being mapped with a different + * type to a different process. + */ +static void page_table_check_set(struct mm_struct *mm, unsigned long addr, + unsigned long pfn, unsigned long pgcnt, + bool rw) +{ + struct page_ext *page_ext; + struct page *page; + bool anon; + int i; + + if (!pfn_valid(pfn)) + return; + + page = pfn_to_page(pfn); + page_ext = lookup_page_ext(page); + anon = PageAnon(page); + + for (i = 0; i < pgcnt; i++) { + struct page_table_check *ptc = get_page_table_check(page_ext); + + if (anon) { + BUG_ON(atomic_read(&ptc->file_map_count)); + BUG_ON(atomic_inc_return(&ptc->anon_map_count) > 1 && rw); + } else { + BUG_ON(atomic_read(&ptc->anon_map_count)); + BUG_ON(atomic_inc_return(&ptc->file_map_count) < 0); + } + page_ext = page_ext_next(page_ext); + } +} + +/* + * page is on free list, or is being allocated, verify that counters are zeroes + * crash if they are not. + */ +void __page_table_check_zero(struct page *page, unsigned int order) +{ + struct page_ext *page_ext = lookup_page_ext(page); + int i; + + BUG_ON(!page_ext); + for (i = 0; i < (1 << order); i++) { + struct page_table_check *ptc = get_page_table_check(page_ext); + + BUG_ON(atomic_read(&ptc->anon_map_count)); + BUG_ON(atomic_read(&ptc->file_map_count)); + page_ext = page_ext_next(page_ext); + } +} + +void __page_table_check_pte_clear(struct mm_struct *mm, unsigned long addr, + pte_t pte) +{ + if (&init_mm == mm) + return; + + if (pte_user_accessible_page(pte)) { + page_table_check_clear(mm, addr, pte_pfn(pte), + PAGE_SIZE >> PAGE_SHIFT); + } +} + +void __page_table_check_pmd_clear(struct mm_struct *mm, unsigned long addr, + pmd_t pmd) +{ + if (&init_mm == mm) + return; + + if (pmd_user_accessible_page(pmd)) { + page_table_check_clear(mm, addr, pmd_pfn(pmd), + PMD_PAGE_SIZE >> PAGE_SHIFT); + } +} + +void __page_table_check_pud_clear(struct mm_struct *mm, unsigned long addr, + pud_t pud) +{ + if (&init_mm == mm) + return; + + if (pud_user_accessible_page(pud)) { + page_table_check_clear(mm, addr, pud_pfn(pud), + PUD_PAGE_SIZE >> PAGE_SHIFT); + } +} + +void __page_table_check_pte_set(struct mm_struct *mm, unsigned long addr, + pte_t *ptep, pte_t pte) +{ + pte_t old_pte; + + if (&init_mm == mm) + return; + + old_pte = *ptep; + if (pte_user_accessible_page(old_pte)) { + page_table_check_clear(mm, addr, pte_pfn(old_pte), + PAGE_SIZE >> PAGE_SHIFT); + } + + if (pte_user_accessible_page(pte)) { + page_table_check_set(mm, addr, pte_pfn(pte), + PAGE_SIZE >> PAGE_SHIFT, + pte_write(pte)); + } +} + +void __page_table_check_pmd_set(struct mm_struct *mm, unsigned long addr, + pmd_t *pmdp, pmd_t pmd) +{ + pmd_t old_pmd; + + if (&init_mm == mm) + return; + + old_pmd = *pmdp; + if (pmd_user_accessible_page(old_pmd)) { + page_table_check_clear(mm, addr, pmd_pfn(old_pmd), + PMD_PAGE_SIZE >> PAGE_SHIFT); + } + + if (pmd_user_accessible_page(pmd)) { + page_table_check_set(mm, addr, pmd_pfn(pmd), + PMD_PAGE_SIZE >> PAGE_SHIFT, + pmd_write(pmd)); + } +} + +void __page_table_check_pud_set(struct mm_struct *mm, unsigned long addr, + pud_t *pudp, pud_t pud) +{ + pud_t old_pud; + + if (&init_mm == mm) + return; + + old_pud = *pudp; + if (pud_user_accessible_page(old_pud)) { + page_table_check_clear(mm, addr, pud_pfn(old_pud), + PUD_PAGE_SIZE >> PAGE_SHIFT); + } + + if (pud_user_accessible_page(pud)) { + page_table_check_set(mm, addr, pud_pfn(pud), + PUD_PAGE_SIZE >> PAGE_SHIFT, + pud_write(pud)); + } +}
Check user page table entries at the time they are added and removed. Allows to synchronously catch memory corruption issues related to double mapping. When a pte for an anonymous page is added into page table, we verify that this pte does not already point to a file backed page, and vice versa if this is a file backed page that is being added we verify that this page does not have an anonymous mapping We also enforce that read-only sharing for anonymous pages is allowed (i.e. cow after fork). All other sharing must be for file pages. Page table check allows to protect and debug cases where "struct page" metadata became corrupted for some reason. For example, when refcnt or mapcount become invalid. Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com> --- Documentation/vm/index.rst | 1 + Documentation/vm/page_table_check.rst | 56 ++++++ MAINTAINERS | 9 + arch/Kconfig | 3 + include/linux/page_table_check.h | 147 +++++++++++++++ mm/Kconfig.debug | 24 +++ mm/Makefile | 1 + mm/page_alloc.c | 4 + mm/page_ext.c | 4 + mm/page_table_check.c | 261 ++++++++++++++++++++++++++ 10 files changed, 510 insertions(+) create mode 100644 Documentation/vm/page_table_check.rst create mode 100644 include/linux/page_table_check.h create mode 100644 mm/page_table_check.c