| Message ID | 20240615160800.250667-1-edumazet@google.com (mailing list archive) |
|---|---|
| State | Accepted |
| Delegated to: | Johannes Berg |
| Headers | show |
| Series | [net] wifi: cfg80211: restrict NL80211_ATTR_TXQ_QUANTUM values | expand |
Eric Dumazet <edumazet@google.com> writes: > syzbot is able to trigger softlockups, setting NL80211_ATTR_TXQ_QUANTUM > to 2^31. > > We had a similar issue in sch_fq, fixed with commit > d9e15a273306 ("pkt_sched: fq: do not accept silly TCA_FQ_QUANTUM") > > watchdog: BUG: soft lockup - CPU#1 stuck for 26s! [kworker/1:0:24] > Modules linked in: > irq event stamp: 131135 > hardirqs last enabled at (131134): [<ffff80008ae8778c>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] > hardirqs last enabled at (131134): [<ffff80008ae8778c>] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95 > hardirqs last disabled at (131135): [<ffff80008ae85378>] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline] > hardirqs last disabled at (131135): [<ffff80008ae85378>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551 > softirqs last enabled at (125892): [<ffff80008907e82c>] neigh_hh_init net/core/neighbour.c:1538 [inline] > softirqs last enabled at (125892): [<ffff80008907e82c>] neigh_resolve_output+0x268/0x658 net/core/neighbour.c:1553 > softirqs last disabled at (125896): [<ffff80008904166c>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 > CPU: 1 PID: 24 Comm: kworker/1:0 Not tainted 6.9.0-rc7-syzkaller-gfda5695d692c #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 > Workqueue: mld mld_ifc_work > pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) > pc : __list_del include/linux/list.h:195 [inline] > pc : __list_del_entry include/linux/list.h:218 [inline] > pc : list_move_tail include/linux/list.h:310 [inline] > pc : fq_tin_dequeue include/net/fq_impl.h:112 [inline] > pc : ieee80211_tx_dequeue+0x6b8/0x3b4c net/mac80211/tx.c:3854 > lr : __list_del_entry include/linux/list.h:218 [inline] > lr : list_move_tail include/linux/list.h:310 [inline] > lr : fq_tin_dequeue include/net/fq_impl.h:112 [inline] > lr : ieee80211_tx_dequeue+0x67c/0x3b4c net/mac80211/tx.c:3854 > sp : ffff800093d36700 > x29: ffff800093d36a60 x28: ffff800093d36960 x27: dfff800000000000 > x26: ffff0000d800ad50 x25: ffff0000d800abe0 x24: ffff0000d800abf0 > x23: ffff0000e0032468 x22: ffff0000e00324d4 x21: ffff0000d800abf0 > x20: ffff0000d800abf8 x19: ffff0000d800abf0 x18: ffff800093d363c0 > x17: 000000000000d476 x16: ffff8000805519dc x15: ffff7000127a6cc8 > x14: 1ffff000127a6cc8 x13: 0000000000000004 x12: ffffffffffffffff > x11: ffff7000127a6cc8 x10: 0000000000ff0100 x9 : 0000000000000000 > x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 > x5 : ffff80009287aa08 x4 : 0000000000000008 x3 : ffff80008034c7fc > x2 : ffff0000e0032468 x1 : 00000000da0e46b8 x0 : ffff0000e0032470 > Call trace: > __list_del include/linux/list.h:195 [inline] > __list_del_entry include/linux/list.h:218 [inline] > list_move_tail include/linux/list.h:310 [inline] > fq_tin_dequeue include/net/fq_impl.h:112 [inline] > ieee80211_tx_dequeue+0x6b8/0x3b4c net/mac80211/tx.c:3854 > wake_tx_push_queue net/mac80211/util.c:294 [inline] > ieee80211_handle_wake_tx_queue+0x118/0x274 net/mac80211/util.c:315 > drv_wake_tx_queue net/mac80211/driver-ops.h:1350 [inline] > schedule_and_wake_txq net/mac80211/driver-ops.h:1357 [inline] > ieee80211_queue_skb+0x18e8/0x2244 net/mac80211/tx.c:1664 > ieee80211_tx+0x260/0x400 net/mac80211/tx.c:1966 > ieee80211_xmit+0x278/0x354 net/mac80211/tx.c:2062 > __ieee80211_subif_start_xmit+0xab8/0x122c net/mac80211/tx.c:4338 > ieee80211_subif_start_xmit+0xe0/0x438 net/mac80211/tx.c:4532 > __netdev_start_xmit include/linux/netdevice.h:4903 [inline] > netdev_start_xmit include/linux/netdevice.h:4917 [inline] > xmit_one net/core/dev.c:3531 [inline] > dev_hard_start_xmit+0x27c/0x938 net/core/dev.c:3547 > __dev_queue_xmit+0x1678/0x33fc net/core/dev.c:4341 > dev_queue_xmit include/linux/netdevice.h:3091 [inline] > neigh_resolve_output+0x558/0x658 net/core/neighbour.c:1563 > neigh_output include/net/neighbour.h:542 [inline] > ip6_finish_output2+0x104c/0x1ee8 net/ipv6/ip6_output.c:137 > ip6_finish_output+0x428/0x7a0 net/ipv6/ip6_output.c:222 > NF_HOOK_COND include/linux/netfilter.h:303 [inline] > ip6_output+0x270/0x594 net/ipv6/ip6_output.c:243 > dst_output include/net/dst.h:450 [inline] > NF_HOOK+0x160/0x4f0 include/linux/netfilter.h:314 > mld_sendpack+0x7b4/0x10f4 net/ipv6/mcast.c:1818 > mld_send_cr net/ipv6/mcast.c:2119 [inline] > mld_ifc_work+0x840/0xd0c net/ipv6/mcast.c:2650 > process_one_work+0x7b8/0x15d4 kernel/workqueue.c:3267 > process_scheduled_works kernel/workqueue.c:3348 [inline] > worker_thread+0x938/0xef4 kernel/workqueue.c:3429 > kthread+0x288/0x310 kernel/kthread.c:388 > ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 > > Fixes: 52539ca89f36 ("cfg80211: Expose TXQ stats and parameters to userspace") > Signed-off-by: Eric Dumazet <edumazet@google.com> > Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk> Hmm, extraneous s-o-b? :) > --- > net/wireless/nl80211.c | 6 +++++- > 1 file changed, 5 insertions(+), 1 deletion(-) > > diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c > index 3c0bca4238d357c01b6fe92bb0f2b2b8a2917725..72c7bf55858166b8fc12114f090bf085d652db6b 100644 > --- a/net/wireless/nl80211.c > +++ b/net/wireless/nl80211.c > @@ -468,6 +468,10 @@ static const struct netlink_range_validation nl80211_punct_bitmap_range = { > .max = 0xffff, > }; > > +static const struct netlink_range_validation q_range = { > + .max = INT_MAX, > +}; The corresponding fixes to sch_fq and fq_codel use a limit of 1<<20; INT_MAX is a bit above that, won't that still lead to issues? -Toke
Eric Dumazet <edumazet@google.com> writes: > syzbot is able to trigger softlockups, setting NL80211_ATTR_TXQ_QUANTUM > to 2^31. > > We had a similar issue in sch_fq, fixed with commit > d9e15a273306 ("pkt_sched: fq: do not accept silly TCA_FQ_QUANTUM") > > watchdog: BUG: soft lockup - CPU#1 stuck for 26s! [kworker/1:0:24] > Modules linked in: > irq event stamp: 131135 > hardirqs last enabled at (131134): [<ffff80008ae8778c>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] > hardirqs last enabled at (131134): [<ffff80008ae8778c>] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95 > hardirqs last disabled at (131135): [<ffff80008ae85378>] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline] > hardirqs last disabled at (131135): [<ffff80008ae85378>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551 > softirqs last enabled at (125892): [<ffff80008907e82c>] neigh_hh_init net/core/neighbour.c:1538 [inline] > softirqs last enabled at (125892): [<ffff80008907e82c>] neigh_resolve_output+0x268/0x658 net/core/neighbour.c:1553 > softirqs last disabled at (125896): [<ffff80008904166c>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 > CPU: 1 PID: 24 Comm: kworker/1:0 Not tainted 6.9.0-rc7-syzkaller-gfda5695d692c #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 > Workqueue: mld mld_ifc_work > pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) > pc : __list_del include/linux/list.h:195 [inline] > pc : __list_del_entry include/linux/list.h:218 [inline] > pc : list_move_tail include/linux/list.h:310 [inline] > pc : fq_tin_dequeue include/net/fq_impl.h:112 [inline] > pc : ieee80211_tx_dequeue+0x6b8/0x3b4c net/mac80211/tx.c:3854 > lr : __list_del_entry include/linux/list.h:218 [inline] > lr : list_move_tail include/linux/list.h:310 [inline] > lr : fq_tin_dequeue include/net/fq_impl.h:112 [inline] > lr : ieee80211_tx_dequeue+0x67c/0x3b4c net/mac80211/tx.c:3854 > sp : ffff800093d36700 > x29: ffff800093d36a60 x28: ffff800093d36960 x27: dfff800000000000 > x26: ffff0000d800ad50 x25: ffff0000d800abe0 x24: ffff0000d800abf0 > x23: ffff0000e0032468 x22: ffff0000e00324d4 x21: ffff0000d800abf0 > x20: ffff0000d800abf8 x19: ffff0000d800abf0 x18: ffff800093d363c0 > x17: 000000000000d476 x16: ffff8000805519dc x15: ffff7000127a6cc8 > x14: 1ffff000127a6cc8 x13: 0000000000000004 x12: ffffffffffffffff > x11: ffff7000127a6cc8 x10: 0000000000ff0100 x9 : 0000000000000000 > x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 > x5 : ffff80009287aa08 x4 : 0000000000000008 x3 : ffff80008034c7fc > x2 : ffff0000e0032468 x1 : 00000000da0e46b8 x0 : ffff0000e0032470 > Call trace: > __list_del include/linux/list.h:195 [inline] > __list_del_entry include/linux/list.h:218 [inline] > list_move_tail include/linux/list.h:310 [inline] > fq_tin_dequeue include/net/fq_impl.h:112 [inline] > ieee80211_tx_dequeue+0x6b8/0x3b4c net/mac80211/tx.c:3854 > wake_tx_push_queue net/mac80211/util.c:294 [inline] > ieee80211_handle_wake_tx_queue+0x118/0x274 net/mac80211/util.c:315 > drv_wake_tx_queue net/mac80211/driver-ops.h:1350 [inline] > schedule_and_wake_txq net/mac80211/driver-ops.h:1357 [inline] > ieee80211_queue_skb+0x18e8/0x2244 net/mac80211/tx.c:1664 > ieee80211_tx+0x260/0x400 net/mac80211/tx.c:1966 > ieee80211_xmit+0x278/0x354 net/mac80211/tx.c:2062 > __ieee80211_subif_start_xmit+0xab8/0x122c net/mac80211/tx.c:4338 > ieee80211_subif_start_xmit+0xe0/0x438 net/mac80211/tx.c:4532 > __netdev_start_xmit include/linux/netdevice.h:4903 [inline] > netdev_start_xmit include/linux/netdevice.h:4917 [inline] > xmit_one net/core/dev.c:3531 [inline] > dev_hard_start_xmit+0x27c/0x938 net/core/dev.c:3547 > __dev_queue_xmit+0x1678/0x33fc net/core/dev.c:4341 > dev_queue_xmit include/linux/netdevice.h:3091 [inline] > neigh_resolve_output+0x558/0x658 net/core/neighbour.c:1563 > neigh_output include/net/neighbour.h:542 [inline] > ip6_finish_output2+0x104c/0x1ee8 net/ipv6/ip6_output.c:137 > ip6_finish_output+0x428/0x7a0 net/ipv6/ip6_output.c:222 > NF_HOOK_COND include/linux/netfilter.h:303 [inline] > ip6_output+0x270/0x594 net/ipv6/ip6_output.c:243 > dst_output include/net/dst.h:450 [inline] > NF_HOOK+0x160/0x4f0 include/linux/netfilter.h:314 > mld_sendpack+0x7b4/0x10f4 net/ipv6/mcast.c:1818 > mld_send_cr net/ipv6/mcast.c:2119 [inline] > mld_ifc_work+0x840/0xd0c net/ipv6/mcast.c:2650 > process_one_work+0x7b8/0x15d4 kernel/workqueue.c:3267 > process_scheduled_works kernel/workqueue.c:3348 [inline] > worker_thread+0x938/0xef4 kernel/workqueue.c:3429 > kthread+0x288/0x310 kernel/kthread.c:388 > ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 > > Fixes: 52539ca89f36 ("cfg80211: Expose TXQ stats and parameters to userspace") > Signed-off-by: Eric Dumazet <edumazet@google.com> > Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk> cfg80211 patches go to wireless tree, not net.
On Mon, Jun 17, 2024 at 12:35 PM Toke Høiland-Jørgensen <toke@toke.dk> wrote: > > Eric Dumazet <edumazet@google.com> writes: > > > syzbot is able to trigger softlockups, setting NL80211_ATTR_TXQ_QUANTUM > > to 2^31. > > > > We had a similar issue in sch_fq, fixed with commit > > d9e15a273306 ("pkt_sched: fq: do not accept silly TCA_FQ_QUANTUM") > > > > watchdog: BUG: soft lockup - CPU#1 stuck for 26s! [kworker/1:0:24] > > Modules linked in: > > irq event stamp: 131135 > > hardirqs last enabled at (131134): [<ffff80008ae8778c>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] > > hardirqs last enabled at (131134): [<ffff80008ae8778c>] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95 > > hardirqs last disabled at (131135): [<ffff80008ae85378>] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline] > > hardirqs last disabled at (131135): [<ffff80008ae85378>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551 > > softirqs last enabled at (125892): [<ffff80008907e82c>] neigh_hh_init net/core/neighbour.c:1538 [inline] > > softirqs last enabled at (125892): [<ffff80008907e82c>] neigh_resolve_output+0x268/0x658 net/core/neighbour.c:1553 > > softirqs last disabled at (125896): [<ffff80008904166c>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 > > CPU: 1 PID: 24 Comm: kworker/1:0 Not tainted 6.9.0-rc7-syzkaller-gfda5695d692c #0 > > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 > > Workqueue: mld mld_ifc_work > > pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) > > pc : __list_del include/linux/list.h:195 [inline] > > pc : __list_del_entry include/linux/list.h:218 [inline] > > pc : list_move_tail include/linux/list.h:310 [inline] > > pc : fq_tin_dequeue include/net/fq_impl.h:112 [inline] > > pc : ieee80211_tx_dequeue+0x6b8/0x3b4c net/mac80211/tx.c:3854 > > lr : __list_del_entry include/linux/list.h:218 [inline] > > lr : list_move_tail include/linux/list.h:310 [inline] > > lr : fq_tin_dequeue include/net/fq_impl.h:112 [inline] > > lr : ieee80211_tx_dequeue+0x67c/0x3b4c net/mac80211/tx.c:3854 > > sp : ffff800093d36700 > > x29: ffff800093d36a60 x28: ffff800093d36960 x27: dfff800000000000 > > x26: ffff0000d800ad50 x25: ffff0000d800abe0 x24: ffff0000d800abf0 > > x23: ffff0000e0032468 x22: ffff0000e00324d4 x21: ffff0000d800abf0 > > x20: ffff0000d800abf8 x19: ffff0000d800abf0 x18: ffff800093d363c0 > > x17: 000000000000d476 x16: ffff8000805519dc x15: ffff7000127a6cc8 > > x14: 1ffff000127a6cc8 x13: 0000000000000004 x12: ffffffffffffffff > > x11: ffff7000127a6cc8 x10: 0000000000ff0100 x9 : 0000000000000000 > > x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 > > x5 : ffff80009287aa08 x4 : 0000000000000008 x3 : ffff80008034c7fc > > x2 : ffff0000e0032468 x1 : 00000000da0e46b8 x0 : ffff0000e0032470 > > Call trace: > > __list_del include/linux/list.h:195 [inline] > > __list_del_entry include/linux/list.h:218 [inline] > > list_move_tail include/linux/list.h:310 [inline] > > fq_tin_dequeue include/net/fq_impl.h:112 [inline] > > ieee80211_tx_dequeue+0x6b8/0x3b4c net/mac80211/tx.c:3854 > > wake_tx_push_queue net/mac80211/util.c:294 [inline] > > ieee80211_handle_wake_tx_queue+0x118/0x274 net/mac80211/util.c:315 > > drv_wake_tx_queue net/mac80211/driver-ops.h:1350 [inline] > > schedule_and_wake_txq net/mac80211/driver-ops.h:1357 [inline] > > ieee80211_queue_skb+0x18e8/0x2244 net/mac80211/tx.c:1664 > > ieee80211_tx+0x260/0x400 net/mac80211/tx.c:1966 > > ieee80211_xmit+0x278/0x354 net/mac80211/tx.c:2062 > > __ieee80211_subif_start_xmit+0xab8/0x122c net/mac80211/tx.c:4338 > > ieee80211_subif_start_xmit+0xe0/0x438 net/mac80211/tx.c:4532 > > __netdev_start_xmit include/linux/netdevice.h:4903 [inline] > > netdev_start_xmit include/linux/netdevice.h:4917 [inline] > > xmit_one net/core/dev.c:3531 [inline] > > dev_hard_start_xmit+0x27c/0x938 net/core/dev.c:3547 > > __dev_queue_xmit+0x1678/0x33fc net/core/dev.c:4341 > > dev_queue_xmit include/linux/netdevice.h:3091 [inline] > > neigh_resolve_output+0x558/0x658 net/core/neighbour.c:1563 > > neigh_output include/net/neighbour.h:542 [inline] > > ip6_finish_output2+0x104c/0x1ee8 net/ipv6/ip6_output.c:137 > > ip6_finish_output+0x428/0x7a0 net/ipv6/ip6_output.c:222 > > NF_HOOK_COND include/linux/netfilter.h:303 [inline] > > ip6_output+0x270/0x594 net/ipv6/ip6_output.c:243 > > dst_output include/net/dst.h:450 [inline] > > NF_HOOK+0x160/0x4f0 include/linux/netfilter.h:314 > > mld_sendpack+0x7b4/0x10f4 net/ipv6/mcast.c:1818 > > mld_send_cr net/ipv6/mcast.c:2119 [inline] > > mld_ifc_work+0x840/0xd0c net/ipv6/mcast.c:2650 > > process_one_work+0x7b8/0x15d4 kernel/workqueue.c:3267 > > process_scheduled_works kernel/workqueue.c:3348 [inline] > > worker_thread+0x938/0xef4 kernel/workqueue.c:3429 > > kthread+0x288/0x310 kernel/kthread.c:388 > > ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 > > > > Fixes: 52539ca89f36 ("cfg80211: Expose TXQ stats and parameters to userspace") > > Signed-off-by: Eric Dumazet <edumazet@google.com> > > Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk> > > Hmm, extraneous s-o-b? :) > > > --- > > net/wireless/nl80211.c | 6 +++++- > > 1 file changed, 5 insertions(+), 1 deletion(-) > > > > diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c > > index 3c0bca4238d357c01b6fe92bb0f2b2b8a2917725..72c7bf55858166b8fc12114f090bf085d652db6b 100644 > > --- a/net/wireless/nl80211.c > > +++ b/net/wireless/nl80211.c > > @@ -468,6 +468,10 @@ static const struct netlink_range_validation nl80211_punct_bitmap_range = { > > .max = 0xffff, > > }; > > > > +static const struct netlink_range_validation q_range = { > > + .max = INT_MAX, > > +}; > > The corresponding fixes to sch_fq and fq_codel use a limit of 1<<20; > INT_MAX is a bit above that, won't that still lead to issues? What kind of issues do you envision ? I do not know what kind of aggregation level wireless will have in 2030.
On Mon, Jun 17, 2024 at 3:15 PM Kalle Valo <kvalo@kernel.org> wrote: > > Eric Dumazet <edumazet@google.com> writes: > > > syzbot is able to trigger softlockups, setting NL80211_ATTR_TXQ_QUANTUM > > to 2^31. > > > > We had a similar issue in sch_fq, fixed with commit > > d9e15a273306 ("pkt_sched: fq: do not accept silly TCA_FQ_QUANTUM") > > > > watchdog: BUG: soft lockup - CPU#1 stuck for 26s! [kworker/1:0:24] > > Modules linked in: > > irq event stamp: 131135 > > hardirqs last enabled at (131134): [<ffff80008ae8778c>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] > > hardirqs last enabled at (131134): [<ffff80008ae8778c>] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95 > > hardirqs last disabled at (131135): [<ffff80008ae85378>] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline] > > hardirqs last disabled at (131135): [<ffff80008ae85378>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551 > > softirqs last enabled at (125892): [<ffff80008907e82c>] neigh_hh_init net/core/neighbour.c:1538 [inline] > > softirqs last enabled at (125892): [<ffff80008907e82c>] neigh_resolve_output+0x268/0x658 net/core/neighbour.c:1553 > > softirqs last disabled at (125896): [<ffff80008904166c>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 > > CPU: 1 PID: 24 Comm: kworker/1:0 Not tainted 6.9.0-rc7-syzkaller-gfda5695d692c #0 > > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 > > Workqueue: mld mld_ifc_work > > pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) > > pc : __list_del include/linux/list.h:195 [inline] > > pc : __list_del_entry include/linux/list.h:218 [inline] > > pc : list_move_tail include/linux/list.h:310 [inline] > > pc : fq_tin_dequeue include/net/fq_impl.h:112 [inline] > > pc : ieee80211_tx_dequeue+0x6b8/0x3b4c net/mac80211/tx.c:3854 > > lr : __list_del_entry include/linux/list.h:218 [inline] > > lr : list_move_tail include/linux/list.h:310 [inline] > > lr : fq_tin_dequeue include/net/fq_impl.h:112 [inline] > > lr : ieee80211_tx_dequeue+0x67c/0x3b4c net/mac80211/tx.c:3854 > > sp : ffff800093d36700 > > x29: ffff800093d36a60 x28: ffff800093d36960 x27: dfff800000000000 > > x26: ffff0000d800ad50 x25: ffff0000d800abe0 x24: ffff0000d800abf0 > > x23: ffff0000e0032468 x22: ffff0000e00324d4 x21: ffff0000d800abf0 > > x20: ffff0000d800abf8 x19: ffff0000d800abf0 x18: ffff800093d363c0 > > x17: 000000000000d476 x16: ffff8000805519dc x15: ffff7000127a6cc8 > > x14: 1ffff000127a6cc8 x13: 0000000000000004 x12: ffffffffffffffff > > x11: ffff7000127a6cc8 x10: 0000000000ff0100 x9 : 0000000000000000 > > x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 > > x5 : ffff80009287aa08 x4 : 0000000000000008 x3 : ffff80008034c7fc > > x2 : ffff0000e0032468 x1 : 00000000da0e46b8 x0 : ffff0000e0032470 > > Call trace: > > __list_del include/linux/list.h:195 [inline] > > __list_del_entry include/linux/list.h:218 [inline] > > list_move_tail include/linux/list.h:310 [inline] > > fq_tin_dequeue include/net/fq_impl.h:112 [inline] > > ieee80211_tx_dequeue+0x6b8/0x3b4c net/mac80211/tx.c:3854 > > wake_tx_push_queue net/mac80211/util.c:294 [inline] > > ieee80211_handle_wake_tx_queue+0x118/0x274 net/mac80211/util.c:315 > > drv_wake_tx_queue net/mac80211/driver-ops.h:1350 [inline] > > schedule_and_wake_txq net/mac80211/driver-ops.h:1357 [inline] > > ieee80211_queue_skb+0x18e8/0x2244 net/mac80211/tx.c:1664 > > ieee80211_tx+0x260/0x400 net/mac80211/tx.c:1966 > > ieee80211_xmit+0x278/0x354 net/mac80211/tx.c:2062 > > __ieee80211_subif_start_xmit+0xab8/0x122c net/mac80211/tx.c:4338 > > ieee80211_subif_start_xmit+0xe0/0x438 net/mac80211/tx.c:4532 > > __netdev_start_xmit include/linux/netdevice.h:4903 [inline] > > netdev_start_xmit include/linux/netdevice.h:4917 [inline] > > xmit_one net/core/dev.c:3531 [inline] > > dev_hard_start_xmit+0x27c/0x938 net/core/dev.c:3547 > > __dev_queue_xmit+0x1678/0x33fc net/core/dev.c:4341 > > dev_queue_xmit include/linux/netdevice.h:3091 [inline] > > neigh_resolve_output+0x558/0x658 net/core/neighbour.c:1563 > > neigh_output include/net/neighbour.h:542 [inline] > > ip6_finish_output2+0x104c/0x1ee8 net/ipv6/ip6_output.c:137 > > ip6_finish_output+0x428/0x7a0 net/ipv6/ip6_output.c:222 > > NF_HOOK_COND include/linux/netfilter.h:303 [inline] > > ip6_output+0x270/0x594 net/ipv6/ip6_output.c:243 > > dst_output include/net/dst.h:450 [inline] > > NF_HOOK+0x160/0x4f0 include/linux/netfilter.h:314 > > mld_sendpack+0x7b4/0x10f4 net/ipv6/mcast.c:1818 > > mld_send_cr net/ipv6/mcast.c:2119 [inline] > > mld_ifc_work+0x840/0xd0c net/ipv6/mcast.c:2650 > > process_one_work+0x7b8/0x15d4 kernel/workqueue.c:3267 > > process_scheduled_works kernel/workqueue.c:3348 [inline] > > worker_thread+0x938/0xef4 kernel/workqueue.c:3429 > > kthread+0x288/0x310 kernel/kthread.c:388 > > ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 > > > > Fixes: 52539ca89f36 ("cfg80211: Expose TXQ stats and parameters to userspace") > > Signed-off-by: Eric Dumazet <edumazet@google.com> > > Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk> > > cfg80211 patches go to wireless tree, not net. > > -- > https://patchwork.kernel.org/project/linux-wireless/list/ > > https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches I used as usual for wifi paches : git send-email \ --to "David S. Miller <davem@davemloft.net>" \ --to "Jakub Kicinski <kuba@kernel.org>" \ --to "Paolo Abeni <pabeni@redhat.com>" \ --cc "linux-wireless@vger.kernel.org" \ --to "Johannes Berg <johannes@sipsolutions.net>" \ --cc "netdev@vger.kernel.org" \ --cc "eric.dumazet@gmail.com" \ --validate \ 0001-wifi-cfg80211-restrict-NL80211_ATTR_TXQ_QUANTUM-valu.patch What did I miss ?
On Wed, Jun 19, 2024 at 11:07 AM Eric Dumazet <edumazet@google.com> wrote: > > On Mon, Jun 17, 2024 at 12:35 PM Toke Høiland-Jørgensen <toke@toke.dk> wrote: > > > > Eric Dumazet <edumazet@google.com> writes: > > > > > syzbot is able to trigger softlockups, setting NL80211_ATTR_TXQ_QUANTUM > > > to 2^31. > > > > > > We had a similar issue in sch_fq, fixed with commit > > > d9e15a273306 ("pkt_sched: fq: do not accept silly TCA_FQ_QUANTUM") > > > > > > watchdog: BUG: soft lockup - CPU#1 stuck for 26s! [kworker/1:0:24] > > > Modules linked in: > > > irq event stamp: 131135 > > > hardirqs last enabled at (131134): [<ffff80008ae8778c>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] > > > hardirqs last enabled at (131134): [<ffff80008ae8778c>] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95 > > > hardirqs last disabled at (131135): [<ffff80008ae85378>] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline] > > > hardirqs last disabled at (131135): [<ffff80008ae85378>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551 > > > softirqs last enabled at (125892): [<ffff80008907e82c>] neigh_hh_init net/core/neighbour.c:1538 [inline] > > > softirqs last enabled at (125892): [<ffff80008907e82c>] neigh_resolve_output+0x268/0x658 net/core/neighbour.c:1553 > > > softirqs last disabled at (125896): [<ffff80008904166c>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 > > > CPU: 1 PID: 24 Comm: kworker/1:0 Not tainted 6.9.0-rc7-syzkaller-gfda5695d692c #0 > > > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 > > > Workqueue: mld mld_ifc_work > > > pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) > > > pc : __list_del include/linux/list.h:195 [inline] > > > pc : __list_del_entry include/linux/list.h:218 [inline] > > > pc : list_move_tail include/linux/list.h:310 [inline] > > > pc : fq_tin_dequeue include/net/fq_impl.h:112 [inline] > > > pc : ieee80211_tx_dequeue+0x6b8/0x3b4c net/mac80211/tx.c:3854 > > > lr : __list_del_entry include/linux/list.h:218 [inline] > > > lr : list_move_tail include/linux/list.h:310 [inline] > > > lr : fq_tin_dequeue include/net/fq_impl.h:112 [inline] > > > lr : ieee80211_tx_dequeue+0x67c/0x3b4c net/mac80211/tx.c:3854 > > > sp : ffff800093d36700 > > > x29: ffff800093d36a60 x28: ffff800093d36960 x27: dfff800000000000 > > > x26: ffff0000d800ad50 x25: ffff0000d800abe0 x24: ffff0000d800abf0 > > > x23: ffff0000e0032468 x22: ffff0000e00324d4 x21: ffff0000d800abf0 > > > x20: ffff0000d800abf8 x19: ffff0000d800abf0 x18: ffff800093d363c0 > > > x17: 000000000000d476 x16: ffff8000805519dc x15: ffff7000127a6cc8 > > > x14: 1ffff000127a6cc8 x13: 0000000000000004 x12: ffffffffffffffff > > > x11: ffff7000127a6cc8 x10: 0000000000ff0100 x9 : 0000000000000000 > > > x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 > > > x5 : ffff80009287aa08 x4 : 0000000000000008 x3 : ffff80008034c7fc > > > x2 : ffff0000e0032468 x1 : 00000000da0e46b8 x0 : ffff0000e0032470 > > > Call trace: > > > __list_del include/linux/list.h:195 [inline] > > > __list_del_entry include/linux/list.h:218 [inline] > > > list_move_tail include/linux/list.h:310 [inline] > > > fq_tin_dequeue include/net/fq_impl.h:112 [inline] > > > ieee80211_tx_dequeue+0x6b8/0x3b4c net/mac80211/tx.c:3854 > > > wake_tx_push_queue net/mac80211/util.c:294 [inline] > > > ieee80211_handle_wake_tx_queue+0x118/0x274 net/mac80211/util.c:315 > > > drv_wake_tx_queue net/mac80211/driver-ops.h:1350 [inline] > > > schedule_and_wake_txq net/mac80211/driver-ops.h:1357 [inline] > > > ieee80211_queue_skb+0x18e8/0x2244 net/mac80211/tx.c:1664 > > > ieee80211_tx+0x260/0x400 net/mac80211/tx.c:1966 > > > ieee80211_xmit+0x278/0x354 net/mac80211/tx.c:2062 > > > __ieee80211_subif_start_xmit+0xab8/0x122c net/mac80211/tx.c:4338 > > > ieee80211_subif_start_xmit+0xe0/0x438 net/mac80211/tx.c:4532 > > > __netdev_start_xmit include/linux/netdevice.h:4903 [inline] > > > netdev_start_xmit include/linux/netdevice.h:4917 [inline] > > > xmit_one net/core/dev.c:3531 [inline] > > > dev_hard_start_xmit+0x27c/0x938 net/core/dev.c:3547 > > > __dev_queue_xmit+0x1678/0x33fc net/core/dev.c:4341 > > > dev_queue_xmit include/linux/netdevice.h:3091 [inline] > > > neigh_resolve_output+0x558/0x658 net/core/neighbour.c:1563 > > > neigh_output include/net/neighbour.h:542 [inline] > > > ip6_finish_output2+0x104c/0x1ee8 net/ipv6/ip6_output.c:137 > > > ip6_finish_output+0x428/0x7a0 net/ipv6/ip6_output.c:222 > > > NF_HOOK_COND include/linux/netfilter.h:303 [inline] > > > ip6_output+0x270/0x594 net/ipv6/ip6_output.c:243 > > > dst_output include/net/dst.h:450 [inline] > > > NF_HOOK+0x160/0x4f0 include/linux/netfilter.h:314 > > > mld_sendpack+0x7b4/0x10f4 net/ipv6/mcast.c:1818 > > > mld_send_cr net/ipv6/mcast.c:2119 [inline] > > > mld_ifc_work+0x840/0xd0c net/ipv6/mcast.c:2650 > > > process_one_work+0x7b8/0x15d4 kernel/workqueue.c:3267 > > > process_scheduled_works kernel/workqueue.c:3348 [inline] > > > worker_thread+0x938/0xef4 kernel/workqueue.c:3429 > > > kthread+0x288/0x310 kernel/kthread.c:388 > > > ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 > > > > > > Fixes: 52539ca89f36 ("cfg80211: Expose TXQ stats and parameters to userspace") > > > Signed-off-by: Eric Dumazet <edumazet@google.com> > > > Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk> > > > > Hmm, extraneous s-o-b? :) > > > > > --- > > > net/wireless/nl80211.c | 6 +++++- > > > 1 file changed, 5 insertions(+), 1 deletion(-) > > > > > > diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c > > > index 3c0bca4238d357c01b6fe92bb0f2b2b8a2917725..72c7bf55858166b8fc12114f090bf085d652db6b 100644 > > > --- a/net/wireless/nl80211.c > > > +++ b/net/wireless/nl80211.c > > > @@ -468,6 +468,10 @@ static const struct netlink_range_validation nl80211_punct_bitmap_range = { > > > .max = 0xffff, > > > }; > > > > > > +static const struct netlink_range_validation q_range = { > > > + .max = INT_MAX, > > > +}; > > > > The corresponding fixes to sch_fq and fq_codel use a limit of 1<<20; > > INT_MAX is a bit above that, won't that still lead to issues? > > What kind of issues do you envision ? > > I do not know what kind of aggregation level wireless will have in 2030. BTW we also chose INT_MAX in this prior commit, for syzkaller sake. commit 7041101ff6c3073fd8f2e99920f535b111c929cb Author: Davide Caratti <dcaratti@redhat.com> Date: Thu Apr 20 16:59:46 2023 +0200 net/sched: sch_fq: fix integer overflow of "credit" I do not think precise value is important, this is only to avoid potential infinite loops.
Eric Dumazet <edumazet@google.com> writes: > On Mon, Jun 17, 2024 at 3:15 PM Kalle Valo <kvalo@kernel.org> wrote: > >> >> Eric Dumazet <edumazet@google.com> writes: >> >> > syzbot is able to trigger softlockups, setting NL80211_ATTR_TXQ_QUANTUM >> > to 2^31. >> > >> > We had a similar issue in sch_fq, fixed with commit >> > d9e15a273306 ("pkt_sched: fq: do not accept silly TCA_FQ_QUANTUM") >> > >> > watchdog: BUG: soft lockup - CPU#1 stuck for 26s! [kworker/1:0:24] >> > Modules linked in: >> > irq event stamp: 131135 >> > hardirqs last enabled at (131134): [<ffff80008ae8778c>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] >> > hardirqs last enabled at (131134): [<ffff80008ae8778c>] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95 >> > hardirqs last disabled at (131135): [<ffff80008ae85378>] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline] >> > hardirqs last disabled at (131135): [<ffff80008ae85378>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551 >> > softirqs last enabled at (125892): [<ffff80008907e82c>] neigh_hh_init net/core/neighbour.c:1538 [inline] >> > softirqs last enabled at (125892): [<ffff80008907e82c>] neigh_resolve_output+0x268/0x658 net/core/neighbour.c:1553 >> > softirqs last disabled at (125896): [<ffff80008904166c>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 >> > CPU: 1 PID: 24 Comm: kworker/1:0 Not tainted 6.9.0-rc7-syzkaller-gfda5695d692c #0 >> > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 >> > Workqueue: mld mld_ifc_work >> > pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) >> > pc : __list_del include/linux/list.h:195 [inline] >> > pc : __list_del_entry include/linux/list.h:218 [inline] >> > pc : list_move_tail include/linux/list.h:310 [inline] >> > pc : fq_tin_dequeue include/net/fq_impl.h:112 [inline] >> > pc : ieee80211_tx_dequeue+0x6b8/0x3b4c net/mac80211/tx.c:3854 >> > lr : __list_del_entry include/linux/list.h:218 [inline] >> > lr : list_move_tail include/linux/list.h:310 [inline] >> > lr : fq_tin_dequeue include/net/fq_impl.h:112 [inline] >> > lr : ieee80211_tx_dequeue+0x67c/0x3b4c net/mac80211/tx.c:3854 >> > sp : ffff800093d36700 >> > x29: ffff800093d36a60 x28: ffff800093d36960 x27: dfff800000000000 >> > x26: ffff0000d800ad50 x25: ffff0000d800abe0 x24: ffff0000d800abf0 >> > x23: ffff0000e0032468 x22: ffff0000e00324d4 x21: ffff0000d800abf0 >> > x20: ffff0000d800abf8 x19: ffff0000d800abf0 x18: ffff800093d363c0 >> > x17: 000000000000d476 x16: ffff8000805519dc x15: ffff7000127a6cc8 >> > x14: 1ffff000127a6cc8 x13: 0000000000000004 x12: ffffffffffffffff >> > x11: ffff7000127a6cc8 x10: 0000000000ff0100 x9 : 0000000000000000 >> > x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 >> > x5 : ffff80009287aa08 x4 : 0000000000000008 x3 : ffff80008034c7fc >> > x2 : ffff0000e0032468 x1 : 00000000da0e46b8 x0 : ffff0000e0032470 >> > Call trace: >> > __list_del include/linux/list.h:195 [inline] >> > __list_del_entry include/linux/list.h:218 [inline] >> > list_move_tail include/linux/list.h:310 [inline] >> > fq_tin_dequeue include/net/fq_impl.h:112 [inline] >> > ieee80211_tx_dequeue+0x6b8/0x3b4c net/mac80211/tx.c:3854 >> > wake_tx_push_queue net/mac80211/util.c:294 [inline] >> > ieee80211_handle_wake_tx_queue+0x118/0x274 net/mac80211/util.c:315 >> > drv_wake_tx_queue net/mac80211/driver-ops.h:1350 [inline] >> > schedule_and_wake_txq net/mac80211/driver-ops.h:1357 [inline] >> > ieee80211_queue_skb+0x18e8/0x2244 net/mac80211/tx.c:1664 >> > ieee80211_tx+0x260/0x400 net/mac80211/tx.c:1966 >> > ieee80211_xmit+0x278/0x354 net/mac80211/tx.c:2062 >> > __ieee80211_subif_start_xmit+0xab8/0x122c net/mac80211/tx.c:4338 >> > ieee80211_subif_start_xmit+0xe0/0x438 net/mac80211/tx.c:4532 >> > __netdev_start_xmit include/linux/netdevice.h:4903 [inline] >> > netdev_start_xmit include/linux/netdevice.h:4917 [inline] >> > xmit_one net/core/dev.c:3531 [inline] >> > dev_hard_start_xmit+0x27c/0x938 net/core/dev.c:3547 >> > __dev_queue_xmit+0x1678/0x33fc net/core/dev.c:4341 >> > dev_queue_xmit include/linux/netdevice.h:3091 [inline] >> > neigh_resolve_output+0x558/0x658 net/core/neighbour.c:1563 >> > neigh_output include/net/neighbour.h:542 [inline] >> > ip6_finish_output2+0x104c/0x1ee8 net/ipv6/ip6_output.c:137 >> > ip6_finish_output+0x428/0x7a0 net/ipv6/ip6_output.c:222 >> > NF_HOOK_COND include/linux/netfilter.h:303 [inline] >> > ip6_output+0x270/0x594 net/ipv6/ip6_output.c:243 >> > dst_output include/net/dst.h:450 [inline] >> > NF_HOOK+0x160/0x4f0 include/linux/netfilter.h:314 >> > mld_sendpack+0x7b4/0x10f4 net/ipv6/mcast.c:1818 >> > mld_send_cr net/ipv6/mcast.c:2119 [inline] >> > mld_ifc_work+0x840/0xd0c net/ipv6/mcast.c:2650 >> > process_one_work+0x7b8/0x15d4 kernel/workqueue.c:3267 >> > process_scheduled_works kernel/workqueue.c:3348 [inline] >> > worker_thread+0x938/0xef4 kernel/workqueue.c:3429 >> > kthread+0x288/0x310 kernel/kthread.c:388 >> > ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 >> > >> > Fixes: 52539ca89f36 ("cfg80211: Expose TXQ stats and parameters to userspace") >> > Signed-off-by: Eric Dumazet <edumazet@google.com> >> > Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk> >> >> cfg80211 patches go to wireless tree, not net. >> >> -- >> https://patchwork.kernel.org/project/linux-wireless/list/ >> >> https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches > > > I used as usual for wifi paches : > > git send-email \ > --to "David S. Miller <davem@davemloft.net>" \ > --to "Jakub Kicinski <kuba@kernel.org>" \ > --to "Paolo Abeni <pabeni@redhat.com>" \ > --cc "linux-wireless@vger.kernel.org" \ > --to "Johannes Berg <johannes@sipsolutions.net>" \ > --cc "netdev@vger.kernel.org" \ > --cc "eric.dumazet@gmail.com" \ > --validate \ > 0001-wifi-cfg80211-restrict-NL80211_ATTR_TXQ_QUANTUM-valu.patch > > > What did I miss ? Just the tag in subject claims it's for the net tree: Subject: [PATCH net] ... Not a big deal, actually happens quite often. I just usually send a reply to remind the net maintainers not take the patch :)
On Wed, Jun 19, 2024 at 11:52 AM Kalle Valo <kvalo@kernel.org> wrote: > > Just the tag in subject claims it's for the net tree: > > Subject: [PATCH net] ... > > Not a big deal, actually happens quite often. I just usually send a > reply to remind the net maintainers not take the patch :) > I see, thanks. My scripts are mainly targeting net trees, that is why we see net there :)
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 3c0bca4238d357c01b6fe92bb0f2b2b8a2917725..72c7bf55858166b8fc12114f090bf085d652db6b 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -468,6 +468,10 @@ static const struct netlink_range_validation nl80211_punct_bitmap_range = { .max = 0xffff, }; +static const struct netlink_range_validation q_range = { + .max = INT_MAX, +}; + static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = { [0] = { .strict_start_type = NL80211_ATTR_HE_OBSS_PD }, [NL80211_ATTR_WIPHY] = { .type = NLA_U32 }, @@ -754,7 +758,7 @@ static const struct nla_policy nl80211_policy[NUM_NL80211_ATTR] = { [NL80211_ATTR_TXQ_LIMIT] = { .type = NLA_U32 }, [NL80211_ATTR_TXQ_MEMORY_LIMIT] = { .type = NLA_U32 }, - [NL80211_ATTR_TXQ_QUANTUM] = { .type = NLA_U32 }, + [NL80211_ATTR_TXQ_QUANTUM] = NLA_POLICY_FULL_RANGE(NLA_U32, &q_range), [NL80211_ATTR_HE_CAPABILITY] = NLA_POLICY_VALIDATE_FN(NLA_BINARY, validate_he_capa, NL80211_HE_MAX_CAPABILITY_LEN),
syzbot is able to trigger softlockups, setting NL80211_ATTR_TXQ_QUANTUM to 2^31. We had a similar issue in sch_fq, fixed with commit d9e15a273306 ("pkt_sched: fq: do not accept silly TCA_FQ_QUANTUM") watchdog: BUG: soft lockup - CPU#1 stuck for 26s! [kworker/1:0:24] Modules linked in: irq event stamp: 131135 hardirqs last enabled at (131134): [<ffff80008ae8778c>] __exit_to_kernel_mode arch/arm64/kernel/entry-common.c:85 [inline] hardirqs last enabled at (131134): [<ffff80008ae8778c>] exit_to_kernel_mode+0xdc/0x10c arch/arm64/kernel/entry-common.c:95 hardirqs last disabled at (131135): [<ffff80008ae85378>] __el1_irq arch/arm64/kernel/entry-common.c:533 [inline] hardirqs last disabled at (131135): [<ffff80008ae85378>] el1_interrupt+0x24/0x68 arch/arm64/kernel/entry-common.c:551 softirqs last enabled at (125892): [<ffff80008907e82c>] neigh_hh_init net/core/neighbour.c:1538 [inline] softirqs last enabled at (125892): [<ffff80008907e82c>] neigh_resolve_output+0x268/0x658 net/core/neighbour.c:1553 softirqs last disabled at (125896): [<ffff80008904166c>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 CPU: 1 PID: 24 Comm: kworker/1:0 Not tainted 6.9.0-rc7-syzkaller-gfda5695d692c #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 Workqueue: mld mld_ifc_work pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : __list_del include/linux/list.h:195 [inline] pc : __list_del_entry include/linux/list.h:218 [inline] pc : list_move_tail include/linux/list.h:310 [inline] pc : fq_tin_dequeue include/net/fq_impl.h:112 [inline] pc : ieee80211_tx_dequeue+0x6b8/0x3b4c net/mac80211/tx.c:3854 lr : __list_del_entry include/linux/list.h:218 [inline] lr : list_move_tail include/linux/list.h:310 [inline] lr : fq_tin_dequeue include/net/fq_impl.h:112 [inline] lr : ieee80211_tx_dequeue+0x67c/0x3b4c net/mac80211/tx.c:3854 sp : ffff800093d36700 x29: ffff800093d36a60 x28: ffff800093d36960 x27: dfff800000000000 x26: ffff0000d800ad50 x25: ffff0000d800abe0 x24: ffff0000d800abf0 x23: ffff0000e0032468 x22: ffff0000e00324d4 x21: ffff0000d800abf0 x20: ffff0000d800abf8 x19: ffff0000d800abf0 x18: ffff800093d363c0 x17: 000000000000d476 x16: ffff8000805519dc x15: ffff7000127a6cc8 x14: 1ffff000127a6cc8 x13: 0000000000000004 x12: ffffffffffffffff x11: ffff7000127a6cc8 x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : ffff80009287aa08 x4 : 0000000000000008 x3 : ffff80008034c7fc x2 : ffff0000e0032468 x1 : 00000000da0e46b8 x0 : ffff0000e0032470 Call trace: __list_del include/linux/list.h:195 [inline] __list_del_entry include/linux/list.h:218 [inline] list_move_tail include/linux/list.h:310 [inline] fq_tin_dequeue include/net/fq_impl.h:112 [inline] ieee80211_tx_dequeue+0x6b8/0x3b4c net/mac80211/tx.c:3854 wake_tx_push_queue net/mac80211/util.c:294 [inline] ieee80211_handle_wake_tx_queue+0x118/0x274 net/mac80211/util.c:315 drv_wake_tx_queue net/mac80211/driver-ops.h:1350 [inline] schedule_and_wake_txq net/mac80211/driver-ops.h:1357 [inline] ieee80211_queue_skb+0x18e8/0x2244 net/mac80211/tx.c:1664 ieee80211_tx+0x260/0x400 net/mac80211/tx.c:1966 ieee80211_xmit+0x278/0x354 net/mac80211/tx.c:2062 __ieee80211_subif_start_xmit+0xab8/0x122c net/mac80211/tx.c:4338 ieee80211_subif_start_xmit+0xe0/0x438 net/mac80211/tx.c:4532 __netdev_start_xmit include/linux/netdevice.h:4903 [inline] netdev_start_xmit include/linux/netdevice.h:4917 [inline] xmit_one net/core/dev.c:3531 [inline] dev_hard_start_xmit+0x27c/0x938 net/core/dev.c:3547 __dev_queue_xmit+0x1678/0x33fc net/core/dev.c:4341 dev_queue_xmit include/linux/netdevice.h:3091 [inline] neigh_resolve_output+0x558/0x658 net/core/neighbour.c:1563 neigh_output include/net/neighbour.h:542 [inline] ip6_finish_output2+0x104c/0x1ee8 net/ipv6/ip6_output.c:137 ip6_finish_output+0x428/0x7a0 net/ipv6/ip6_output.c:222 NF_HOOK_COND include/linux/netfilter.h:303 [inline] ip6_output+0x270/0x594 net/ipv6/ip6_output.c:243 dst_output include/net/dst.h:450 [inline] NF_HOOK+0x160/0x4f0 include/linux/netfilter.h:314 mld_sendpack+0x7b4/0x10f4 net/ipv6/mcast.c:1818 mld_send_cr net/ipv6/mcast.c:2119 [inline] mld_ifc_work+0x840/0xd0c net/ipv6/mcast.c:2650 process_one_work+0x7b8/0x15d4 kernel/workqueue.c:3267 process_scheduled_works kernel/workqueue.c:3348 [inline] worker_thread+0x938/0xef4 kernel/workqueue.c:3429 kthread+0x288/0x310 kernel/kthread.c:388 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 Fixes: 52539ca89f36 ("cfg80211: Expose TXQ stats and parameters to userspace") Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: Toke Høiland-Jørgensen <toke@toke.dk> --- net/wireless/nl80211.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)