audit: backlog limit exceeded
audit: audit_backlog=65 > audit_backlog_limit=64
audit: audit_lost=148 audit_rate_limit=0 audit_backlog_limit=64
audit: backlog limit exceeded
rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5174/1:b..l
rcu: (detected by 1, t=10503 jiffies, g=88729, q=1008 ncpus=2)
task:klogd state:R running task stack:25032 pid:5174 tgid:5174 ppid:1 task_flags:0x400100 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x1139/0x6150 kernel/sched/core.c:6863
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7190
irqentry_exit+0x1d8/0x8c0 kernel/entry/common.c:216
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:rcu_is_watching+0x5/0xc0 kernel/rcu/tree.c:747
Code: 6f 3e 03 e9 51 ff ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 55 <53> 65 ff 05 c3 9e 0f 12 e8 ce 0d d5 09 48 c7 c3 e8 e9 b3 93 89 c5
RSP: 0018:ffffc90003867aa8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 0000000000000019 RCX: ffffffff845ec6b8
RDX: ffff88807c768000 RSI: ffffffff845ec7a4 RDI: 0000000000000005
RBP: 0000000000000004 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: ffff88807c768b30 R12: 000000000000004e
R13: 000000000000004e R14: ffffc90003867b38 R15: 0000000000000001
rcu_read_lock include/linux/rcupdate.h:868 [inline]
avc_has_perm_noaudit+0x169/0x3b0 security/selinux/avc.c:1156
avc_has_perm+0xbe/0x1f0 security/selinux/avc.c:1195
sock_has_perm+0x251/0x2f0 security/selinux/hooks.c:4815
security_socket_sendmsg+0x9b/0x240 security/security.c:4210
__sock_sendmsg net/socket.c:739 [inline]
__sys_sendto+0x281/0x520 net/socket.c:2206
__do_sys_sendto net/socket.c:2213 [inline]
__se_sys_sendto net/socket.c:2209 [inline]
__x64_sys_sendto+0xe0/0x1c0 net/socket.c:2209
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f39fa881407
RSP: 002b:00007ffd23244df0 EFLAGS: 00000202 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f39fa731c80 RCX: 00007f39fa881407
RDX: 0000000000000075 RSI: 00007ffd23244f30 RDI: 0000000000000003
RBP: 00007ffd23245360 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000202 R12: 00007ffd23245378
R13: 00007ffd23244f30 R14: 000000000000005a R15: 00007ffd23244f30
rcu: rcu_preempt kthread starved for 10532 jiffies! g88729 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->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:R running task stack:28064 pid:16 tgid:16 ppid:2 task_flags:0x208040 flags:0x00080000
Call Trace:
context_switch kernel/sched/core.c:5256 [inline]
__schedule+0x1139/0x6150 kernel/sched/core.c:6863
__schedule_loop kernel/sched/core.c:6945 [inline]
schedule+0xe7/0x3a0 kernel/sched/core.c:6960
schedule_timeout+0x123/0x290 kernel/time/sleep_timeout.c:99
rcu_gp_fqs_loop+0x1ea/0xaf0 kernel/rcu/tree.c:2083
rcu_gp_kthread+0x26d/0x380 kernel/rcu/tree.c:2285
kthread+0x3c5/0x780 kernel/kthread.c:463
ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
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: 17971 Comm: syz.7.3038 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:trace_lock_acquire include/trace/events/lock.h:24 [inline]
RIP: 0010:lock_acquire+0x4e/0x330 kernel/locking/lockdep.c:5831
Code: 48 8b 05 cd b4 18 12 48 89 44 24 30 31 c0 66 90 65 8b 05 e9 b4 18 12 83 f8 07 0f 87 a2 02 00 00 89 c0 48 0f a3 05 72 b9 ee 0e <0f> 82 74 02 00 00 8b 35 0a ea ee 0e 85 f6 0f 85 8d 00 00 00 48 8b
RSP: 0018:ffffc90000007c70 EFLAGS: 00000097
RAX: 0000000000000000 RBX: ffff888032a59bd8 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888032a59bd8
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: ffff88807d0054b0 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f21921b46c0(0000) GS:ffff8881248f5000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c31ba27 CR3: 000000005e06e000 CR4: 00000000003526f0
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
__lock_task_sighand+0xc2/0x340 kernel/signal.c:1380
lock_task_sighand include/linux/sched/signal.h:748 [inline]
posixtimer_send_sigqueue+0x209/0x1060 kernel/signal.c:1990
posix_timer_queue_signal+0x106/0x170 kernel/time/posix-timers.c:364
posix_timer_fn+0x3a/0x80 kernel/time/posix-timers.c:379
__run_hrtimer kernel/time/hrtimer.c:1777 [inline]
__hrtimer_run_queues+0x202/0xc40 kernel/time/hrtimer.c:1841
hrtimer_interrupt+0x397/0x8e0 kernel/time/hrtimer.c:1903
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1045 [inline]
__sysvec_apic_timer_interrupt+0x10b/0x3c0 arch/x86/kernel/apic/apic.c:1062
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1056 [inline]
sysvec_apic_timer_interrupt+0x9f/0xc0 arch/x86/kernel/apic/apic.c:1056
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202
Code: 90 f3 0f 1e fa 53 48 8b 74 24 08 48 89 fb 48 83 c7 18 e8 2a 0e 1f f6 48 89 df e8 e2 60 1f f6 e8 5d 22 4c f6 fb bf 01 00 00 00 f2 63 0f f6 65 8b 05 9b c9 37 08 85 c0 74 06 5b e9 01 4d 00 00
RSP: 0018:ffffc9000c3e7ca0 EFLAGS: 00000206
RAX: 0000000004b34405 RBX: ffff888032a59bc0 RCX: ffffffff81c707ef
RDX: 0000000000000000 RSI: ffffffff8dacdf23 RDI: 0000000000000001
RBP: ffff888032a59dc0 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff9088b4d7 R11: ffff88807d0054b0 R12: 0000000000000000
R13: 0000000000000011 R14: 0000000000000200 R15: ffff888032a59bc0
spin_unlock_irq include/linux/spinlock.h:401 [inline]
get_signal+0x1e6a/0x26d0 kernel/signal.c:3037
arch_do_signal_or_restart+0x8f/0x7e0 arch/x86/kernel/signal.c:337
__exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
exit_to_user_mode_loop+0x8c/0x540 kernel/entry/common.c:75
__exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
do_syscall_64+0x4ee/0xf80 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2193f8f749
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:00007f21921b4038 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 00007f21941e6180 RCX: 00007f2193f8f749
RDX: 0000200000000300 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f2194013f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f21941e6218 R14: 00007f21941e6180 R15: 00007ffea8bf1218
audit: audit_backlog=65 > audit_backlog_limit=64