| Message ID | 20220401073343.277047-2-razor@blackwall.org (mailing list archive) |
|---|---|
| State | Accepted |
| Commit | 6bf92d70e690b7ff12b24f4bfff5e5434d019b82 |
| Delegated to: | Netdev Maintainers |
| Headers | show |
| Series | net: ipv4: fix nexthop route delete warning | expand |
Le 01/04/2022 à 09:33, Nikolay Aleksandrov a écrit : > FRR folks have hit a kernel warning[1] while deleting routes[2] which is > caused by trying to delete a route pointing to a nexthop id without > specifying nhid but matching on an interface. That is, a route is found > but we hit a warning while matching it. The warning is from > fib_info_nh() in include/net/nexthop.h because we run it on a fib_info > with nexthop object. The call chain is: > inet_rtm_delroute -> fib_table_delete -> fib_nh_match (called with a > nexthop fib_info and also with fc_oif set thus calling fib_info_nh on > the fib_info and triggering the warning). The fix is to not do any > matching in that branch if the fi has a nexthop object because those are > managed separately. I.e. we should match when deleting without nh spec and > should fail when deleting a nexthop route with old-style nh spec because > nexthop objects are managed separately, e.g.: > $ ip r show 1.2.3.4/32 > 1.2.3.4 nhid 12 via 192.168.11.2 dev dummy0 > > $ ip r del 1.2.3.4/32 > $ ip r del 1.2.3.4/32 nhid 12 > <both should work> > > $ ip r del 1.2.3.4/32 dev dummy0 > <should fail with ESRCH> > > [1] > [ 523.462226] ------------[ cut here ]------------ > [ 523.462230] WARNING: CPU: 14 PID: 22893 at include/net/nexthop.h:468 fib_nh_match+0x210/0x460 > [ 523.462236] Modules linked in: dummy rpcsec_gss_krb5 xt_socket nf_socket_ipv4 nf_socket_ipv6 ip6table_raw iptable_raw bpf_preload xt_statistic ip_set ip_vs_sh ip_vs_wrr ip_vs_rr ip_vs xt_mark nf_tables xt_nat veth nf_conntrack_netlink nfnetlink xt_addrtype br_netfilter overlay dm_crypt nfsv3 nfs fscache netfs vhost_net vhost vhost_iotlb tap tun xt_CHECKSUM xt_MASQUERADE xt_conntrack 8021q garp mrp ipt_REJECT nf_reject_ipv4 ip6table_mangle ip6table_nat iptable_mangle iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_filter bridge stp llc rfcomm snd_seq_dummy snd_hrtimer rpcrdma rdma_cm iw_cm ib_cm ib_core ip6table_filter xt_comment ip6_tables vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) qrtr bnep binfmt_misc xfs vfat fat squashfs loop nvidia_drm(POE) nvidia_modeset(POE) nvidia_uvm(POE) nvidia(POE) intel_rapl_msr intel_rapl_common snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi btusb btrtl iwlmvm uvcvideo btbcm snd_hda_intel edac_mce_amd > [ 523.462274] videobuf2_vmalloc videobuf2_memops btintel snd_intel_dspcfg videobuf2_v4l2 snd_intel_sdw_acpi bluetooth snd_usb_audio snd_hda_codec mac80211 snd_usbmidi_lib joydev snd_hda_core videobuf2_common kvm_amd snd_rawmidi snd_hwdep snd_seq videodev ccp snd_seq_device libarc4 ecdh_generic mc snd_pcm kvm iwlwifi snd_timer drm_kms_helper snd cfg80211 cec soundcore irqbypass rapl wmi_bmof i2c_piix4 rfkill k10temp pcspkr acpi_cpufreq nfsd auth_rpcgss nfs_acl lockd grace sunrpc drm zram ip_tables crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel nvme sp5100_tco r8169 nvme_core wmi ipmi_devintf ipmi_msghandler fuse > [ 523.462300] CPU: 14 PID: 22893 Comm: ip Tainted: P OE 5.16.18-200.fc35.x86_64 #1 > [ 523.462302] Hardware name: Micro-Star International Co., Ltd. MS-7C37/MPG X570 GAMING EDGE WIFI (MS-7C37), BIOS 1.C0 10/29/2020 > [ 523.462303] RIP: 0010:fib_nh_match+0x210/0x460 > [ 523.462304] Code: 7c 24 20 48 8b b5 90 00 00 00 e8 bb ee f4 ff 48 8b 7c 24 20 41 89 c4 e8 ee eb f4 ff 45 85 e4 0f 85 2e fe ff ff e9 4c ff ff ff <0f> 0b e9 17 ff ff ff 3c 0a 0f 85 61 fe ff ff 48 8b b5 98 00 00 00 > [ 523.462306] RSP: 0018:ffffaa53d4d87928 EFLAGS: 00010286 > [ 523.462307] RAX: 0000000000000000 RBX: ffffaa53d4d87a90 RCX: ffffaa53d4d87bb0 > [ 523.462308] RDX: ffff9e3d2ee6be80 RSI: ffffaa53d4d87a90 RDI: ffffffff920ed380 > [ 523.462309] RBP: ffff9e3d2ee6be80 R08: 0000000000000064 R09: 0000000000000000 > [ 523.462310] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000031 > [ 523.462310] R13: 0000000000000020 R14: 0000000000000000 R15: ffff9e3d331054e0 > [ 523.462311] FS: 00007f245517c1c0(0000) GS:ffff9e492ed80000(0000) knlGS:0000000000000000 > [ 523.462313] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [ 523.462313] CR2: 000055e5dfdd8268 CR3: 00000003ef488000 CR4: 0000000000350ee0 > [ 523.462315] Call Trace: > [ 523.462316] <TASK> > [ 523.462320] fib_table_delete+0x1a9/0x310 > [ 523.462323] inet_rtm_delroute+0x93/0x110 > [ 523.462325] rtnetlink_rcv_msg+0x133/0x370 > [ 523.462327] ? _copy_to_iter+0xb5/0x6f0 > [ 523.462330] ? rtnl_calcit.isra.0+0x110/0x110 > [ 523.462331] netlink_rcv_skb+0x50/0xf0 > [ 523.462334] netlink_unicast+0x211/0x330 > [ 523.462336] netlink_sendmsg+0x23f/0x480 > [ 523.462338] sock_sendmsg+0x5e/0x60 > [ 523.462340] ____sys_sendmsg+0x22c/0x270 > [ 523.462341] ? import_iovec+0x17/0x20 > [ 523.462343] ? sendmsg_copy_msghdr+0x59/0x90 > [ 523.462344] ? __mod_lruvec_page_state+0x85/0x110 > [ 523.462348] ___sys_sendmsg+0x81/0xc0 > [ 523.462350] ? netlink_seq_start+0x70/0x70 > [ 523.462352] ? __dentry_kill+0x13a/0x180 > [ 523.462354] ? __fput+0xff/0x250 > [ 523.462356] __sys_sendmsg+0x49/0x80 > [ 523.462358] do_syscall_64+0x3b/0x90 > [ 523.462361] entry_SYSCALL_64_after_hwframe+0x44/0xae > [ 523.462364] RIP: 0033:0x7f24552aa337 > [ 523.462365] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 > [ 523.462366] RSP: 002b:00007fff7f05a838 EFLAGS: 00000246 ORIG_RAX: 000000000000002e > [ 523.462368] RAX: ffffffffffffffda RBX: 000000006245bf91 RCX: 00007f24552aa337 > [ 523.462368] RDX: 0000000000000000 RSI: 00007fff7f05a8a0 RDI: 0000000000000003 > [ 523.462369] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 > [ 523.462370] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000001 > [ 523.462370] R13: 00007fff7f05ce08 R14: 0000000000000000 R15: 000055e5dfdd1040 > [ 523.462373] </TASK> > [ 523.462374] ---[ end trace ba537bc16f6bf4ed ]--- > > [2] https://github.com/FRRouting/frr/issues/6412 > > Fixes: 4c7e8084fd46 ("ipv4: Plumb support for nexthop object in a fib_info") > Signed-off-by: Nikolay Aleksandrov <razor@blackwall.org> > Reviewed-by: David Ahern <dsahern@kernel.org> This patch has been applied in Linus' tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6bf92d70e690 Could it be backported to stable trees? Regards, Nicolas
Nicolas Dichtel <nicolas.dichtel@6wind.com> 于2022年4月8日周五 16:47写道： > > > Le 01/04/2022 à 09:33, Nikolay Aleksandrov a écrit : > > FRR folks have hit a kernel warning[1] while deleting routes[2] which is > > caused by trying to delete a route pointing to a nexthop id without > > specifying nhid but matching on an interface. That is, a route is found > > but we hit a warning while matching it. The warning is from > > fib_info_nh() in include/net/nexthop.h because we run it on a fib_info > > with nexthop object. The call chain is: > > inet_rtm_delroute -> fib_table_delete -> fib_nh_match (called with a > > nexthop fib_info and also with fc_oif set thus calling fib_info_nh on > > the fib_info and triggering the warning). The fix is to not do any > > matching in that branch if the fi has a nexthop object because those are > > managed separately. I.e. we should match when deleting without nh spec and > > should fail when deleting a nexthop route with old-style nh spec because > > nexthop objects are managed separately, e.g.: > > $ ip r show 1.2.3.4/32 > > 1.2.3.4 nhid 12 via 192.168.11.2 dev dummy0 > > > > $ ip r del 1.2.3.4/32 > > $ ip r del 1.2.3.4/32 nhid 12 > > <both should work> > > > > $ ip r del 1.2.3.4/32 dev dummy0 > > <should fail with ESRCH> > > > > [1] > > [ 523.462226] ------------[ cut here ]------------ > > [ 523.462230] WARNING: CPU: 14 PID: 22893 at include/net/nexthop.h:468 fib_nh_match+0x210/0x460 > > [ 523.462236] Modules linked in: dummy rpcsec_gss_krb5 xt_socket nf_socket_ipv4 nf_socket_ipv6 ip6table_raw iptable_raw bpf_preload xt_statistic ip_set ip_vs_sh ip_vs_wrr ip_vs_rr ip_vs xt_mark nf_tables xt_nat veth nf_conntrack_netlink nfnetlink xt_addrtype br_netfilter overlay dm_crypt nfsv3 nfs fscache netfs vhost_net vhost vhost_iotlb tap tun xt_CHECKSUM xt_MASQUERADE xt_conntrack 8021q garp mrp ipt_REJECT nf_reject_ipv4 ip6table_mangle ip6table_nat iptable_mangle iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_filter bridge stp llc rfcomm snd_seq_dummy snd_hrtimer rpcrdma rdma_cm iw_cm ib_cm ib_core ip6table_filter xt_comment ip6_tables vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) qrtr bnep binfmt_misc xfs vfat fat squashfs loop nvidia_drm(POE) nvidia_modeset(POE) nvidia_uvm(POE) nvidia(POE) intel_rapl_msr intel_rapl_common snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi btusb btrtl iwlmvm uvcvideo btbcm snd_hda_intel edac_mce_amd > > [ 523.462274] videobuf2_vmalloc videobuf2_memops btintel snd_intel_dspcfg videobuf2_v4l2 snd_intel_sdw_acpi bluetooth snd_usb_audio snd_hda_codec mac80211 snd_usbmidi_lib joydev snd_hda_core videobuf2_common kvm_amd snd_rawmidi snd_hwdep snd_seq videodev ccp snd_seq_device libarc4 ecdh_generic mc snd_pcm kvm iwlwifi snd_timer drm_kms_helper snd cfg80211 cec soundcore irqbypass rapl wmi_bmof i2c_piix4 rfkill k10temp pcspkr acpi_cpufreq nfsd auth_rpcgss nfs_acl lockd grace sunrpc drm zram ip_tables crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel nvme sp5100_tco r8169 nvme_core wmi ipmi_devintf ipmi_msghandler fuse > > [ 523.462300] CPU: 14 PID: 22893 Comm: ip Tainted: P OE 5.16.18-200.fc35.x86_64 #1 > > [ 523.462302] Hardware name: Micro-Star International Co., Ltd. MS-7C37/MPG X570 GAMING EDGE WIFI (MS-7C37), BIOS 1.C0 10/29/2020 > > [ 523.462303] RIP: 0010:fib_nh_match+0x210/0x460 > > [ 523.462304] Code: 7c 24 20 48 8b b5 90 00 00 00 e8 bb ee f4 ff 48 8b 7c 24 20 41 89 c4 e8 ee eb f4 ff 45 85 e4 0f 85 2e fe ff ff e9 4c ff ff ff <0f> 0b e9 17 ff ff ff 3c 0a 0f 85 61 fe ff ff 48 8b b5 98 00 00 00 > > [ 523.462306] RSP: 0018:ffffaa53d4d87928 EFLAGS: 00010286 > > [ 523.462307] RAX: 0000000000000000 RBX: ffffaa53d4d87a90 RCX: ffffaa53d4d87bb0 > > [ 523.462308] RDX: ffff9e3d2ee6be80 RSI: ffffaa53d4d87a90 RDI: ffffffff920ed380 > > [ 523.462309] RBP: ffff9e3d2ee6be80 R08: 0000000000000064 R09: 0000000000000000 > > [ 523.462310] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000031 > > [ 523.462310] R13: 0000000000000020 R14: 0000000000000000 R15: ffff9e3d331054e0 > > [ 523.462311] FS: 00007f245517c1c0(0000) GS:ffff9e492ed80000(0000) knlGS:0000000000000000 > > [ 523.462313] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > > [ 523.462313] CR2: 000055e5dfdd8268 CR3: 00000003ef488000 CR4: 0000000000350ee0 > > [ 523.462315] Call Trace: > > [ 523.462316] <TASK> > > [ 523.462320] fib_table_delete+0x1a9/0x310 > > [ 523.462323] inet_rtm_delroute+0x93/0x110 > > [ 523.462325] rtnetlink_rcv_msg+0x133/0x370 > > [ 523.462327] ? _copy_to_iter+0xb5/0x6f0 > > [ 523.462330] ? rtnl_calcit.isra.0+0x110/0x110 > > [ 523.462331] netlink_rcv_skb+0x50/0xf0 > > [ 523.462334] netlink_unicast+0x211/0x330 > > [ 523.462336] netlink_sendmsg+0x23f/0x480 > > [ 523.462338] sock_sendmsg+0x5e/0x60 > > [ 523.462340] ____sys_sendmsg+0x22c/0x270 > > [ 523.462341] ? import_iovec+0x17/0x20 > > [ 523.462343] ? sendmsg_copy_msghdr+0x59/0x90 > > [ 523.462344] ? __mod_lruvec_page_state+0x85/0x110 > > [ 523.462348] ___sys_sendmsg+0x81/0xc0 > > [ 523.462350] ? netlink_seq_start+0x70/0x70 > > [ 523.462352] ? __dentry_kill+0x13a/0x180 > > [ 523.462354] ? __fput+0xff/0x250 > > [ 523.462356] __sys_sendmsg+0x49/0x80 > > [ 523.462358] do_syscall_64+0x3b/0x90 > > [ 523.462361] entry_SYSCALL_64_after_hwframe+0x44/0xae > > [ 523.462364] RIP: 0033:0x7f24552aa337 > > [ 523.462365] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 > > [ 523.462366] RSP: 002b:00007fff7f05a838 EFLAGS: 00000246 ORIG_RAX: 000000000000002e > > [ 523.462368] RAX: ffffffffffffffda RBX: 000000006245bf91 RCX: 00007f24552aa337 > > [ 523.462368] RDX: 0000000000000000 RSI: 00007fff7f05a8a0 RDI: 0000000000000003 > > [ 523.462369] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 > > [ 523.462370] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000001 > > [ 523.462370] R13: 00007fff7f05ce08 R14: 0000000000000000 R15: 000055e5dfdd1040 > > [ 523.462373] </TASK> > > [ 523.462374] ---[ end trace ba537bc16f6bf4ed ]--- > > > > [2] https://github.com/FRRouting/frr/issues/6412 > > > > Fixes: 4c7e8084fd46 ("ipv4: Plumb support for nexthop object in a fib_info") > > Signed-off-by: Nikolay Aleksandrov <razor@blackwall.org> > > Reviewed-by: David Ahern <dsahern@kernel.org> > This patch has been applied in Linus' tree: > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6bf92d70e690 > > Could it be backported to stable trees? Normally stable maintainer will auto backport because the Fixes tag. I tested with stable 5.10.y, it applied clean and the fix works. > > > Regards, > Nicolas Regards! Jinpu Wang @ IONOS Cloud.
Le 08/04/2022 à 17:06, Jack Wang a écrit : [snip] >> Could it be backported to stable trees? > > Normally stable maintainer will auto backport because the Fixes tag. Ok, there is no mention of this here: https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html Thus, I follow the 'option 2'. > I tested with stable 5.10.y, it applied clean and the fix works. Thanks, Nicolas
diff --git a/net/ipv4/fib_semantics.c b/net/ipv4/fib_semantics.c index cc8e84ef2ae4..ccb62038f6a4 100644 --- a/net/ipv4/fib_semantics.c +++ b/net/ipv4/fib_semantics.c @@ -889,8 +889,13 @@ int fib_nh_match(struct net *net, struct fib_config *cfg, struct fib_info *fi, } if (cfg->fc_oif || cfg->fc_gw_family) { - struct fib_nh *nh = fib_info_nh(fi, 0); + struct fib_nh *nh; + + /* cannot match on nexthop object attributes */ + if (fi->nh) + return 1; + nh = fib_info_nh(fi, 0); if (cfg->fc_encap) { if (fib_encap_match(net, cfg->fc_encap_type, cfg->fc_encap, nh, cfg, extack))
FRR folks have hit a kernel warning[1] while deleting routes[2] which is caused by trying to delete a route pointing to a nexthop id without specifying nhid but matching on an interface. That is, a route is found but we hit a warning while matching it. The warning is from fib_info_nh() in include/net/nexthop.h because we run it on a fib_info with nexthop object. The call chain is: inet_rtm_delroute -> fib_table_delete -> fib_nh_match (called with a nexthop fib_info and also with fc_oif set thus calling fib_info_nh on the fib_info and triggering the warning). The fix is to not do any matching in that branch if the fi has a nexthop object because those are managed separately. I.e. we should match when deleting without nh spec and should fail when deleting a nexthop route with old-style nh spec because nexthop objects are managed separately, e.g.: $ ip r show 1.2.3.4/32 1.2.3.4 nhid 12 via 192.168.11.2 dev dummy0 $ ip r del 1.2.3.4/32 $ ip r del 1.2.3.4/32 nhid 12 <both should work> $ ip r del 1.2.3.4/32 dev dummy0 <should fail with ESRCH> [1] [ 523.462226] ------------[ cut here ]------------ [ 523.462230] WARNING: CPU: 14 PID: 22893 at include/net/nexthop.h:468 fib_nh_match+0x210/0x460 [ 523.462236] Modules linked in: dummy rpcsec_gss_krb5 xt_socket nf_socket_ipv4 nf_socket_ipv6 ip6table_raw iptable_raw bpf_preload xt_statistic ip_set ip_vs_sh ip_vs_wrr ip_vs_rr ip_vs xt_mark nf_tables xt_nat veth nf_conntrack_netlink nfnetlink xt_addrtype br_netfilter overlay dm_crypt nfsv3 nfs fscache netfs vhost_net vhost vhost_iotlb tap tun xt_CHECKSUM xt_MASQUERADE xt_conntrack 8021q garp mrp ipt_REJECT nf_reject_ipv4 ip6table_mangle ip6table_nat iptable_mangle iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 iptable_filter bridge stp llc rfcomm snd_seq_dummy snd_hrtimer rpcrdma rdma_cm iw_cm ib_cm ib_core ip6table_filter xt_comment ip6_tables vboxnetadp(OE) vboxnetflt(OE) vboxdrv(OE) qrtr bnep binfmt_misc xfs vfat fat squashfs loop nvidia_drm(POE) nvidia_modeset(POE) nvidia_uvm(POE) nvidia(POE) intel_rapl_msr intel_rapl_common snd_hda_codec_realtek snd_hda_codec_generic ledtrig_audio snd_hda_codec_hdmi btusb btrtl iwlmvm uvcvideo btbcm snd_hda_intel edac_mce_amd [ 523.462274] videobuf2_vmalloc videobuf2_memops btintel snd_intel_dspcfg videobuf2_v4l2 snd_intel_sdw_acpi bluetooth snd_usb_audio snd_hda_codec mac80211 snd_usbmidi_lib joydev snd_hda_core videobuf2_common kvm_amd snd_rawmidi snd_hwdep snd_seq videodev ccp snd_seq_device libarc4 ecdh_generic mc snd_pcm kvm iwlwifi snd_timer drm_kms_helper snd cfg80211 cec soundcore irqbypass rapl wmi_bmof i2c_piix4 rfkill k10temp pcspkr acpi_cpufreq nfsd auth_rpcgss nfs_acl lockd grace sunrpc drm zram ip_tables crct10dif_pclmul crc32_pclmul crc32c_intel ghash_clmulni_intel nvme sp5100_tco r8169 nvme_core wmi ipmi_devintf ipmi_msghandler fuse [ 523.462300] CPU: 14 PID: 22893 Comm: ip Tainted: P OE 5.16.18-200.fc35.x86_64 #1 [ 523.462302] Hardware name: Micro-Star International Co., Ltd. MS-7C37/MPG X570 GAMING EDGE WIFI (MS-7C37), BIOS 1.C0 10/29/2020 [ 523.462303] RIP: 0010:fib_nh_match+0x210/0x460 [ 523.462304] Code: 7c 24 20 48 8b b5 90 00 00 00 e8 bb ee f4 ff 48 8b 7c 24 20 41 89 c4 e8 ee eb f4 ff 45 85 e4 0f 85 2e fe ff ff e9 4c ff ff ff <0f> 0b e9 17 ff ff ff 3c 0a 0f 85 61 fe ff ff 48 8b b5 98 00 00 00 [ 523.462306] RSP: 0018:ffffaa53d4d87928 EFLAGS: 00010286 [ 523.462307] RAX: 0000000000000000 RBX: ffffaa53d4d87a90 RCX: ffffaa53d4d87bb0 [ 523.462308] RDX: ffff9e3d2ee6be80 RSI: ffffaa53d4d87a90 RDI: ffffffff920ed380 [ 523.462309] RBP: ffff9e3d2ee6be80 R08: 0000000000000064 R09: 0000000000000000 [ 523.462310] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000031 [ 523.462310] R13: 0000000000000020 R14: 0000000000000000 R15: ffff9e3d331054e0 [ 523.462311] FS: 00007f245517c1c0(0000) GS:ffff9e492ed80000(0000) knlGS:0000000000000000 [ 523.462313] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 523.462313] CR2: 000055e5dfdd8268 CR3: 00000003ef488000 CR4: 0000000000350ee0 [ 523.462315] Call Trace: [ 523.462316] <TASK> [ 523.462320] fib_table_delete+0x1a9/0x310 [ 523.462323] inet_rtm_delroute+0x93/0x110 [ 523.462325] rtnetlink_rcv_msg+0x133/0x370 [ 523.462327] ? _copy_to_iter+0xb5/0x6f0 [ 523.462330] ? rtnl_calcit.isra.0+0x110/0x110 [ 523.462331] netlink_rcv_skb+0x50/0xf0 [ 523.462334] netlink_unicast+0x211/0x330 [ 523.462336] netlink_sendmsg+0x23f/0x480 [ 523.462338] sock_sendmsg+0x5e/0x60 [ 523.462340] ____sys_sendmsg+0x22c/0x270 [ 523.462341] ? import_iovec+0x17/0x20 [ 523.462343] ? sendmsg_copy_msghdr+0x59/0x90 [ 523.462344] ? __mod_lruvec_page_state+0x85/0x110 [ 523.462348] ___sys_sendmsg+0x81/0xc0 [ 523.462350] ? netlink_seq_start+0x70/0x70 [ 523.462352] ? __dentry_kill+0x13a/0x180 [ 523.462354] ? __fput+0xff/0x250 [ 523.462356] __sys_sendmsg+0x49/0x80 [ 523.462358] do_syscall_64+0x3b/0x90 [ 523.462361] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 523.462364] RIP: 0033:0x7f24552aa337 [ 523.462365] Code: 0e 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b9 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 [ 523.462366] RSP: 002b:00007fff7f05a838 EFLAGS: 00000246 ORIG_RAX: 000000000000002e [ 523.462368] RAX: ffffffffffffffda RBX: 000000006245bf91 RCX: 00007f24552aa337 [ 523.462368] RDX: 0000000000000000 RSI: 00007fff7f05a8a0 RDI: 0000000000000003 [ 523.462369] RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 [ 523.462370] R10: 0000000000000008 R11: 0000000000000246 R12: 0000000000000001 [ 523.462370] R13: 00007fff7f05ce08 R14: 0000000000000000 R15: 000055e5dfdd1040 [ 523.462373] </TASK> [ 523.462374] ---[ end trace ba537bc16f6bf4ed ]--- [2] https://github.com/FRRouting/frr/issues/6412 Fixes: 4c7e8084fd46 ("ipv4: Plumb support for nexthop object in a fib_info") Signed-off-by: Nikolay Aleksandrov <razor@blackwall.org> Reviewed-by: David Ahern <dsahern@kernel.org> --- v2: added more information in the commit msg, no functional changes net/ipv4/fib_semantics.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)