rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P6081/1:b..l P50/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=31141, q=421 ncpus=2)
task:kworker/u8:3 state:R running task stack:25088 pid:50 tgid:50 ppid:2 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7068
irqentry_exit+0x36/0x90 kernel/entry/common.c:354
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:lockdep_enabled kernel/locking/lockdep.c:119 [inline]
RIP: 0010:lock_acquire kernel/locking/lockdep.c:5730 [inline]
RIP: 0010:lock_acquire+0x10c/0x560 kernel/locking/lockdep.c:5719
Code: e9 03 83 c0 03 0f b6 14 11 38 d0 7c 08 84 d2 0f 85 f3 03 00 00 8b 0d eb 95 33 0e 85 c9 0f 84 e3 00 00 00 65 8b 05 8c a0 96 7e <85> c0 0f 85 1d 01 00 00 65 48 8b 15 b4 ec 97 7e 48 8d ba d4 0a 00
RSP: 0018:ffffc90000bb79c0 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 1ffff92000176f3a RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8b6f6c20 RDI: ffffffff8d262b40
RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff1f3e99a
R10: ffffffff8f9f4cd7 R11: 0000000000000003 R12: 0000000000000000
R13: 0000000000000000 R14: ffffffff8d7b0e20 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
rcu_read_lock include/linux/rcupdate.h:781 [inline]
inet_twsk_purge+0x126/0x8f0 net/ipv4/inet_timewait_sock.c:277
ops_exit_list+0x128/0x180 net/core/net_namespace.c:175
cleanup_net+0x5b7/0xbf0 net/core/net_namespace.c:637
process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3254
process_scheduled_works kernel/workqueue.c:3335 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3416
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
task:syz-executor.2 state:R running task stack:27040 pid:6081 tgid:6081 ppid:5081 flags:0x00004002
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
preempt_schedule_common+0x44/0xc0 kernel/sched/core.c:6925
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:12
unwind_next_frame+0x1c90/0x23a0 arch/x86/kernel/unwind_orc.c:672
arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
save_stack+0x162/0x1f0 mm/page_owner.c:156
__reset_page_owner+0x8d/0x400 mm/page_owner.c:302
reset_page_owner include/linux/page_owner.h:25 [inline]
free_pages_prepare mm/page_alloc.c:1141 [inline]
free_unref_page_prepare+0x527/0xb10 mm/page_alloc.c:2347
free_unref_page+0x33/0x3c0 mm/page_alloc.c:2487
vfree+0x181/0x7a0 mm/vmalloc.c:3340
kcov_put kernel/kcov.c:429 [inline]
kcov_put+0x2a/0x40 kernel/kcov.c:425
kcov_close+0x10/0x20 kernel/kcov.c:525
__fput+0x270/0xb80 fs/file_table.c:422
task_work_run+0x14e/0x250 kernel/task_work.c:180
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xa7d/0x2c10 kernel/exit.c:878
do_group_exit+0xd3/0x2a0 kernel/exit.c:1027
__do_sys_exit_group kernel/exit.c:1038 [inline]
__se_sys_exit_group kernel/exit.c:1036 [inline]
__x64_sys_exit_group+0x3e/0x50 kernel/exit.c:1036
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa1c667dea9
RSP: 002b:00007ffc8e44bb58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fa1c667dea9
RDX: 00007fa1c667cbb0 RSI: 000000000000000c RDI: 0000000000000000
RBP: 00007ffc8e44bc50 R08: 00007ffc8e4498f7 R09: 00007ffc8e44c238
R10: 0000000000000019 R11: 0000000000000246 R12: 00007ffc8e44c238
R13: 0000000000000003 R14: 00007fa1c67ac9d8 R15: 000000000000000c
rcu: rcu_preempt kthread starved for 10565 jiffies! g31141 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=1
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:27664 pid:16 tgid:16 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6838
schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2582
rcu_gp_fqs_loop+0x1eb/0xb00 kernel/rcu/tree.c:1663
rcu_gp_kthread+0x271/0x380 kernel/rcu/tree.c:1862
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
rcu: Stack dump where RCU GP kthread last ran:
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 7326 Comm: syz-executor.0 Not tainted 6.9.0-rc5-syzkaller-00036-g9d1ddab261f3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:memory_is_nonzero mm/kasan/generic.c:103 [inline]
RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:129 [inline]
RIP: 0010:memory_is_poisoned mm/kasan/generic.c:161 [inline]
RIP: 0010:check_region_inline mm/kasan/generic.c:180 [inline]
RIP: 0010:kasan_check_range+0x64/0x1a0 mm/kasan/generic.c:189
Code: 89 fd 48 b8 00 00 00 00 00 fc ff df 4d 89 d1 48 c1 ed 03 49 c1 e9 03 48 01 c5 49 01 c1 48 89 e8 49 8d 59 01 48 89 da 48 29 ea <48> 83 fa 10 0f 8e 8d 00 00 00 41 89 eb 41 83 e3 07 0f 85 9a 00 00
RSP: 0018:ffffc900033ff9d8 EFLAGS: 00000002
RAX: fffffbfff27bb432 RBX: fffffbfff27bb433 RCX: ffffffff816af51e
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffffff93dda190
RBP: fffffbfff27bb432 R08: 0000000000000000 R09: fffffbfff27bb432
R10: ffffffff93dda197 R11: 0000000000000000 R12: 0000000000000000
R13: 00000000000000b2 R14: ffff888023fe0ad8 R15: 0000000000000004
FS: 00007ff78c8866c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a289ab2300 CR3: 000000007a60c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
instrument_atomic_read include/linux/instrumented.h:68 [inline]
_test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline]
hlock_class+0x4e/0x130 kernel/locking/lockdep.c:228
__lock_acquire+0xc5d/0x3b30 kernel/locking/lockdep.c:5134
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:351 [inline]
dequeue_signal+0x2d3/0x660 kernel/signal.c:697
get_signal+0x5fb/0x2710 kernel/signal.c:2790
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x14a/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xdc/0x260 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff78ba7dea7
Code: 14 25 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89
RSP: 002b:00007ff78c8860c8 EFLAGS: 00000246
RAX: 00000000000001c1 RBX: 00007ff78bbabf80 RCX: 00007ff78ba7dea9
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000020000180
RBP: 00007ff78baca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007ff78bbabf80 R15: 00007ffe1492d168
sched: RT throttling activated