wlan1: beacon TX faster than countdown (channel/color switch) completion
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P8562/1:b..l
rcu: (detected by 1, t=10502 jiffies, g=27005, q=383 ncpus=2)
task:syz.3.660 state:R running task stack:26248 pid:8562 tgid:8560 ppid:5812 task_flags:0x40054c flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x116a/0x5de0 kernel/sched/core.c:6785
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6965
preempt_schedule_thunk+0x16/0x30 arch/x86/entry/thunk.S:12
__raw_spin_unlock include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3e/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
zap_pte_range mm/memory.c:1765 [inline]
zap_pmd_range mm/memory.c:1827 [inline]
zap_pud_range mm/memory.c:1856 [inline]
zap_p4d_range mm/memory.c:1877 [inline]
unmap_page_range+0x106b/0x4350 mm/memory.c:1898
unmap_single_vma.constprop.0+0x153/0x240 mm/memory.c:1941
unmap_vmas+0x218/0x470 mm/memory.c:1985
exit_mmap+0x1b9/0xb90 mm/mmap.c:1284
__mmput+0x12a/0x410 kernel/fork.c:1121
mmput+0x62/0x70 kernel/fork.c:1144
exit_mm kernel/exit.c:581 [inline]
do_exit+0x7c4/0x2bd0 kernel/exit.c:952
do_group_exit+0xd3/0x2a0 kernel/exit.c:1105
get_signal+0x2673/0x26d0 kernel/signal.c:3034
arch_do_signal_or_restart+0x8f/0x7d0 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop+0x84/0x110 kernel/entry/common.c:111
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
do_syscall_64+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f8d5cb8e929
RSP: 002b:00007f8d5d9eb038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: 000000000000003c RBX: 00007f8d5cdb5fa0 RCX: 00007f8d5cb8e929
RDX: 0000000004000010 RSI: 0000200000000380 RDI: 0000000000000004
RBP: 00007f8d5cc10b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f8d5cdb5fa0 R15: 00007ffde045dd18
rcu: rcu_preempt kthread timer wakeup didn't happen for 10499 jiffies! g27005 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402
rcu: Possible timer handling issue on cpu=0 timer-softirq=19706
rcu: rcu_preempt kthread starved for 10500 jiffies! g27005 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x402 ->cpu=0
rcu: Unless rcu_preempt kthread gets sufficient CPU time, OOM is now expected behavior.
rcu: RCU grace-period kthread stack dump:
task:rcu_preempt state:I stack:27784 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5396 [inline]
__schedule+0x116a/0x5de0 kernel/sched/core.c:6785
__schedule_loop kernel/sched/core.c:6863 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6878
schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1ea/0xb00 kernel/rcu/tree.c:2054
rcu_gp_kthread+0x270/0x380 kernel/rcu/tree.c:2256
kthread+0x3c2/0x780 kernel/kthread.c:464
ret_from_fork+0x5d4/0x6f0 arch/x86/kernel/process.c:148
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 8590 Comm: syz.7.665 Not tainted 6.16.0-rc3-syzkaller-00057-g92ca6c498a5e #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:rcu_is_watching+0x80/0xc0 kernel/rcu/tree.c:746
Code: 89 da 48 c1 ea 03 0f b6 14 02 48 89 d8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 24 8b 03 c1 e8 02 83 e0 01 65 ff 0d c0 82 2b 12 <74> 07 5b 5d c3 cc cc cc cc e8 e2 07 8b ff 5b 5d e9 1b 15 e2 09 48
RSP: 0018:ffffc90000007d20 EFLAGS: 00000002
RAX: 0000000000000001 RBX: ffff8880b8433228 RCX: ffffffff89926b3d
RDX: 0000000000000000 RSI: ffffffff8c157b20 RDI: ffffffff8df26da0
RBP: 0000000000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff8993285b
R13: 185a77969c000000 R14: 0000000000000000 R15: ffff88805c104000
FS: 00007fb9f63656c0(0000) GS:ffff888124752000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556421742aa8 CR3: 0000000077b59000 CR4: 00000000003526f0
DR0: 0000000000000007 DR1: 0000000000000001 DR2: 0000000000000002
DR3: 0000000000000009 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_lock_release include/trace/events/lock.h:69 [inline]
lock_release+0x201/0x2f0 kernel/locking/lockdep.c:5882
__raw_spin_unlock include/linux/spinlock_api_smp.h:141 [inline]
_raw_spin_unlock+0x16/0x50 kernel/locking/spinlock.c:186
spin_unlock include/linux/spinlock.h:391 [inline]
advance_sched+0x62b/0xc80 net/sched/sch_taprio.c:981
__run_hrtimer kernel/time/hrtimer.c:1761 [inline]
__hrtimer_run_queues+0x202/0xad0 kernel/time/hrtimer.c:1825
hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1887
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
__sysvec_apic_timer_interrupt+0x108/0x3f0 arch/x86/kernel/apic/apic.c:1056
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_flush_all+0x9a2/0xc60 kernel/printk/printk.c:3227
Code: 00 e8 a2 9b 28 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 50 c6 20 00 48 85 db 0f 85 55 01 00 00 e8 d2 ca 20 00 fb 4c 89 e0 <48> c1 e8 03 42 80 3c 38 00 0f 84 11 ff ff ff 4c 89 e7 e8 17 a7 87
RSP: 0018:ffffc90003e4efc0 EFLAGS: 00000283
RAX: ffffffff8f2eba98 RBX: 0000000000000000 RCX: ffffc9000c229000
RDX: 0000000000080000 RSI: ffffffff819b52ce RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff8f2eba98
R13: ffffffff8f2eba40 R14: ffffc90003e4f050 R15: dffffc0000000000
__console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
_printk+0xc7/0x100 kernel/printk/printk.c:2475
br_multicast_set_startup_query_intvl+0xe4/0x120 net/bridge/br_multicast.c:4821
br_changelink+0xfdc/0x1710 net/bridge/br_netlink.c:1486
rtnl_changelink net/core/rtnetlink.c:3719 [inline]
__rtnl_newlink net/core/rtnetlink.c:3918 [inline]
rtnl_newlink+0x129b/0x2000 net/core/rtnetlink.c:4055
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6944
netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2534
netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
netlink_unicast+0x53a/0x7f0 net/netlink/af_netlink.c:1339
netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg net/socket.c:727 [inline]
____sys_sendmsg+0xa95/0xc70 net/socket.c:2566
___sys_sendmsg+0x134/0x1d0 net/socket.c:2620
__sys_sendmsg+0x16d/0x220 net/socket.c:2652
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb9f558e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb9f6365038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fb9f57b5fa0 RCX: 00007fb9f558e929
RDX: 0000000000000000 RSI: 0000200000000280 RDI: 0000000000000007
RBP: 00007fb9f5610b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb9f57b5fa0 R15: 00007ffde27f7af8
watchdog: BUG: soft lockup - CPU#1 stuck for 225s! [udevd:5823]
Modules linked in:
irq event stamp: 2160844
hardirqs last enabled at (2160843): [] irqentry_exit+0x3b/0x90 kernel/entry/common.c:310
hardirqs last disabled at (2160844): [] sysvec_apic_timer_interrupt+0xe/0xc0 arch/x86/kernel/apic/apic.c:1050
softirqs last enabled at (2160842): [] softirq_handle_end kernel/softirq.c:425 [inline]
softirqs last enabled at (2160842): [] handle_softirqs+0x5be/0x8e0 kernel/softirq.c:607
softirqs last disabled at (2160571): [] __do_softirq kernel/softirq.c:613 [inline]
softirqs last disabled at (2160571): [] invoke_softirq kernel/softirq.c:453 [inline]
softirqs last disabled at (2160571): [] __irq_exit_rcu+0x109/0x170 kernel/softirq.c:680
CPU: 1 UID: 0 PID: 5823 Comm: udevd Not tainted 6.16.0-rc3-syzkaller-00057-g92ca6c498a5e #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:csd_lock_wait kernel/smp.c:340 [inline]
RIP: 0010:smp_call_function_many_cond+0xd84/0x1510 kernel/smp.c:885
Code: 46 48 8b 14 24 49 89 d6 49 89 d5 49 c1 ee 03 41 83 e5 07 4d 01 e6 41 83 c5 03 e8 f7 1b 0c 00 f3 90 41 0f b6 06 41 38 c5 7c 08 <84> c0 0f 85 6f 05 00 00 8b 43 08 31 ff 83 e0 01 89 c5 89 c6 e8 13
RSP: 0000:ffffc9000427f8c8 EFLAGS: 00000206
RAX: 0000000000000000 RBX: ffff8880b84421e0 RCX: ffffffff81b001cd
RDX: ffff888025204880 RSI: ffffffff81b001a9 RDI: 0000000000000005
RBP: 0000000000000001 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: dffffc0000000000
R13: 0000000000000003 R14: ffffed101708843d R15: ffff8880b853b580
FS: 00007f3a461a2880(0000) GS:ffff888124852000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556421724fe8 CR3: 000000005d53f000 CR4: 00000000003526f0
DR0: 0000000000000007 DR1: 0000000000000001 DR2: 0000000000000002
DR3: 0000000000000009 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
on_each_cpu_cond_mask+0x40/0x90 kernel/smp.c:1052
__flush_tlb_multi arch/x86/include/asm/paravirt.h:91 [inline]
flush_tlb_multi arch/x86/mm/tlb.c:1361 [inline]
flush_tlb_mm_range+0x4a0/0x1790 arch/x86/mm/tlb.c:1451
flush_tlb_page arch/x86/include/asm/tlbflush.h:324 [inline]
ptep_clear_flush+0x136/0x180 mm/pgtable-generic.c:101
wp_page_copy mm/memory.c:3635 [inline]
do_wp_page+0x1683/0x4f20 mm/memory.c:4030
handle_pte_fault mm/memory.c:6085 [inline]
__handle_mm_fault+0x2223/0x5490 mm/memory.c:6212
handle_mm_fault+0x589/0xd10 mm/memory.c:6381
do_user_addr_fault+0x60c/0x1370 arch/x86/mm/fault.c:1336
handle_page_fault arch/x86/mm/fault.c:1476 [inline]
exc_page_fault+0x5c/0xb0 arch/x86/mm/fault.c:1532
asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623
RIP: 0033:0x7f3a45ab5db7
Code: 00 00 00 41 55 48 89 d0 49 89 fd 41 54 49 89 f4 53 4c 89 c3 48 83 ec 10 48 39 4f 60 0f 84 c1 00 00 00 42 f6 44 01 08 01 74 59 <48> 83 61 08 fe 48 3d ff 03 00 00 76 69 49 8b 55 70 49 8d 75 60 48
RSP: 002b:00007ffecf11d110 EFLAGS: 00010202
RAX: 0000000000006010 RBX: 00000000000001f0 RCX: 0000556421724fe0
RDX: 0000000000006010 RSI: 000055642171efd0 RDI: 00007f3a45bf1ac0
RBP: 00007f3a45bf1ac0 R08: 00000000000001f0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 000055642171efd0
R13: 00007f3a45bf1ac0 R14: 00000000000001f0 R15: 00007f3a45bf1ac0
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 8590 Comm: syz.7.665 Not tainted 6.16.0-rc3-syzkaller-00057-g92ca6c498a5e #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:trace_lock_acquire include/trace/events/lock.h:24 [inline]
RIP: 0010:lock_acquire+0x4e/0x350 kernel/locking/lockdep.c:5834
Code: 48 8b 05 3d 63 34 12 48 89 44 24 30 31 c0 66 90 65 8b 05 59 63 34 12 83 f8 07 0f 87 bc 02 00 00 89 c0 48 0f a3 05 62 95 0f 0f <0f> 82 74 02 00 00 8b 35 4a c7 0f 0f 85 f6 0f 85 8d 00 00 00 48 8b
RSP: 0018:ffffc90000007c90 EFLAGS: 00000097
RAX: 0000000000000000 RBX: ffffffff9afaf6e0 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff9afaf6e0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff9afaf6c8 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 00007fb9f63656c0(0000) GS:ffff888124752000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000556421742aa8 CR3: 0000000077b59000 CR4: 00000000003526f0
DR0: 0000000000000007 DR1: 0000000000000001 DR2: 0000000000000002
DR3: 0000000000000009 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162
debug_object_activate+0x14c/0x4c0 lib/debugobjects.c:818
debug_hrtimer_activate kernel/time/hrtimer.c:445 [inline]
debug_activate kernel/time/hrtimer.c:484 [inline]
enqueue_hrtimer+0x23/0x3b0 kernel/time/hrtimer.c:1088
__run_hrtimer kernel/time/hrtimer.c:1778 [inline]
__hrtimer_run_queues+0x8ff/0xad0 kernel/time/hrtimer.c:1825
hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1887
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1039 [inline]
__sysvec_apic_timer_interrupt+0x108/0x3f0 arch/x86/kernel/apic/apic.c:1056
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:console_flush_all+0x9a2/0xc60 kernel/printk/printk.c:3227
Code: 00 e8 a2 9b 28 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de e8 50 c6 20 00 48 85 db 0f 85 55 01 00 00 e8 d2 ca 20 00 fb 4c 89 e0 <48> c1 e8 03 42 80 3c 38 00 0f 84 11 ff ff ff 4c 89 e7 e8 17 a7 87
RSP: 0018:ffffc90003e4efc0 EFLAGS: 00000283
RAX: ffffffff8f2eba98 RBX: 0000000000000000 RCX: ffffc9000c229000
RDX: 0000000000080000 RSI: ffffffff819b52ce RDI: 0000000000000007
RBP: 0000000000000000 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff8f2eba98
R13: ffffffff8f2eba40 R14: ffffc90003e4f050 R15: dffffc0000000000
__console_flush_and_unlock kernel/printk/printk.c:3285 [inline]
console_unlock+0xd8/0x210 kernel/printk/printk.c:3325
vprintk_emit+0x418/0x6d0 kernel/printk/printk.c:2450
_printk+0xc7/0x100 kernel/printk/printk.c:2475
br_multicast_set_startup_query_intvl+0xe4/0x120 net/bridge/br_multicast.c:4821
br_changelink+0xfdc/0x1710 net/bridge/br_netlink.c:1486
rtnl_changelink net/core/rtnetlink.c:3719 [inline]
__rtnl_newlink net/core/rtnetlink.c:3918 [inline]
rtnl_newlink+0x129b/0x2000 net/core/rtnetlink.c:4055
rtnetlink_rcv_msg+0x95e/0xe90 net/core/rtnetlink.c:6944
netlink_rcv_skb+0x158/0x420 net/netlink/af_netlink.c:2534
netlink_unicast_kernel net/netlink/af_netlink.c:1313 [inline]
netlink_unicast+0x53a/0x7f0 net/netlink/af_netlink.c:1339
netlink_sendmsg+0x8d1/0xdd0 net/netlink/af_netlink.c:1883
sock_sendmsg_nosec net/socket.c:712 [inline]
__sock_sendmsg net/socket.c:727 [inline]
____sys_sendmsg+0xa95/0xc70 net/socket.c:2566
___sys_sendmsg+0x134/0x1d0 net/socket.c:2620
__sys_sendmsg+0x16d/0x220 net/socket.c:2652
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb9f558e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb9f6365038 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007fb9f57b5fa0 RCX: 00007fb9f558e929
RDX: 0000000000000000 RSI: 0000200000000280 RDI: 0000000000000007
RBP: 00007fb9f5610b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fb9f57b5fa0 R15: 00007ffde27f7af8