rcu: INFO: rcu_preempt detected stalls on CPUs/tasks:
rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P2838/1:b..l
rcu: (detected by 0, t=10503 jiffies, g=16181, q=693 ncpus=2)
task:kworker/u4:10 state:R running task stack:25904 pid:2838 tgid:2838 ppid:2 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0xf15/0x5ce0 kernel/sched/core.c:6727
preempt_schedule_irq+0x51/0x90 kernel/sched/core.c:7047
irqentry_exit+0x36/0x90 kernel/entry/common.c:348
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:649
RIP: 0010:inet_twsk_purge+0x52a/0x910 net/ipv4/inet_timewait_sock.c:319
Code: 00 00 00 00 e8 97 bb 2e f8 e9 dc fb ff ff 4c 8b 2c 24 e8 d9 a1 68 f8 48 8b 5c 24 28 49 d1 ef 4c 89 fe 48 89 df e8 16 9c 68 f8 <4c> 39 fb 0f 85 2f fc ff ff 44 8b 6c 24 44 e8 b3 a1 68 f8 e8 1e 10
RSP: 0000:ffffc9000bd4fae8 EFLAGS: 00000293
RAX: 0000000000000000 RBX: 000000000001cf81 RCX: ffffffff892380ba
RDX: ffff88802d02d940 RSI: 000000000001cf81 RDI: 0000000000000006
RBP: dffffc0000000000 R08: 0000000000000006 R09: 000000000001cf81
R10: 000000000001cf81 R11: 0000000000000003 R12: 0000000000000000
R13: ffffed100589cf81 R14: dffffc0000000000 R15: 000000000001cf81
ops_exit_list+0x128/0x180 net/core/net_namespace.c:175
cleanup_net+0x508/0xb20 net/core/net_namespace.c:618
process_one_work+0x8d5/0x16e0 kernel/workqueue.c:2633
process_scheduled_works kernel/workqueue.c:2707 [inline]
worker_thread+0x8b6/0x1290 kernel/workqueue.c:2788
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:242
rcu: rcu_preempt kthread starved for 10521 jiffies! g16181 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:27760 pid:17 tgid:17 ppid:2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0xf15/0x5ce0 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0xe7/0x280 kernel/sched/core.c:6817
schedule_timeout+0x136/0x2a0 kernel/time/timer.c:2183
rcu_gp_fqs_loop+0x1eb/0xb10 kernel/rcu/tree.c:1631
rcu_gp_kthread+0x245/0x380 kernel/rcu/tree.c:1830
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:242
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: 6078 Comm: syz-executor.2 Not tainted 6.7.0-next-20240119-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:get_current arch/x86/include/asm/current.h:49 [inline]
RIP: 0010:write_comp_data+0x9/0x90 kernel/kcov.c:235
Code: 80 f0 15 00 00 c3 cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 49 89 d2 49 89 f8 49 89 f1 <65> 48 8b 15 cf a6 77 7e 65 8b 05 d0 a6 77 7e a9 00 01 ff 00 74 0f
RSP: 0018:ffffc900001f0980 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffffc900001f0a08 RCX: ffffffff813c16cd
RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000004
RBP: 0000000000000002 R08: 0000000000000004 R09: 0000000000000002
R10: 0000000000000002 R11: 0000000000000002 R12: 0000000000000002
R13: 0000000000000001 R14: 0000000000000001 R15: 0000000000000001
FS: 00007f79d664e6c0(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f79d664df00 CR3: 00000000671a6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unwind_next_frame+0x117d/0x2390 arch/x86/kernel/unwind_orc.c:664
arch_stack_walk+0x100/0x170 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x95/0xd0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:314 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:340
kasan_slab_alloc include/linux/kasan.h:201 [inline]
slab_post_alloc_hook mm/slub.c:3813 [inline]
slab_alloc_node mm/slub.c:3860 [inline]
kmem_cache_alloc+0x136/0x320 mm/slub.c:3867
__sigqueue_alloc+0x244/0x6b0 kernel/signal.c:427
__send_signal_locked+0x138/0x11c0 kernel/signal.c:1118
do_send_sig_info kernel/signal.c:1300 [inline]
group_send_sig_info+0x2aa/0x300 kernel/signal.c:1451
do_bpf_send_signal+0x9a/0x1d0 kernel/trace/bpf_trace.c:838
irq_work_single+0x1bc/0x260 kernel/irq_work.c:221
irq_work_run_list+0x92/0xc0 kernel/irq_work.c:252
irq_work_run+0x58/0xd0 kernel/irq_work.c:261
__sysvec_irq_work+0x8c/0x3a0 arch/x86/kernel/irq_work.c:22
sysvec_irq_work+0x90/0xb0 arch/x86/kernel/irq_work.c:17
asm_sysvec_irq_work+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
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 5f af f6 48 89 df e8 92 da af f6 e8 fd 06 d7 f6 fb bf 01 00 00 00 32 22 a1 f6 65 8b 05 c3 96 47 75 85 c0 74 06 5b c3 cc cc cc cc
RSP: 0018:ffffc9001611fcf8 EFLAGS: 00000206
RAX: 000000000218c1b7 RBX: ffff88802cd2e5c0 RCX: 1ffffffff1ef35f9
RDX: 0000000000000000 RSI: ffffffff8aecbd00 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff8f79e257 R11: 0000000000000001 R12: ffff88802cd2ea58
R13: 0000000000000021 R14: ffff88802cd2e9c0 R15: 1ffff92002c23fae
spin_unlock_irq include/linux/spinlock.h:401 [inline]
get_signal+0x187d/0x2760 kernel/signal.c:2896
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop kernel/entry/common.c:105 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:201 [inline]
syscall_exit_to_user_mode+0x153/0x2b0 kernel/entry/common.c:212
do_syscall_64+0xe2/0x260 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f79d5827800
Code: 5b 5d c3 48 8d 3d 0f 0a 0a 00 e8 ab fa ff ff 48 8d 3d 11 0a 0a 00 e8 9f fa ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 <53> 89 fb 48 83 ec 10 64 8b 04 25 ac ff ff ff 85 c0 74 2a 89 fe 31
RSP: 002b:00007f79d664db38 EFLAGS: 00000202
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 00007f79d58df000
RDX: 00007f79d664db40 RSI: 00007f79d664dc70 RDI: 000000000000000b
RBP: 00007f79d58c947a R08: 0000000000000153 R09: 0000000000000001
R10: 00007ffc9b4e7080 R11: 0000000000e955ec R12: 0000000000000000
R13: 000000000000006e R14: 00007f79d59ac1f0 R15: 00007ffc9b4a8368