rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (9822 ticks this GP) idle=7ac4/1/0x4000000000000000 softirq=20080/20093 fqs=4091
rcu: hardirqs softirqs csw/system
rcu: number: 1823125 55 0
rcu: cputime: 27420 25059 45 ==> 52480(ms)
rcu: (t=10500 jiffies g=23137 q=1639 ncpus=2)
CPU: 1 PID: 7752 Comm: syz.0.604 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:unwind_next_frame+0x645/0x2990 arch/x86/kernel/unwind_orc.c:505
Code: 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 e0 1c 00 00 4c 89 e0 48 c1 e8 03 42 0f b6 04 38 84 c0 0f 85 ec 1c 00 00 45 0f b6 76 01 <41> 83 e6 07 4c 89 f7 48 c7 c6 a0 05 fa 8c e8 e8 bf 4b 00 4d 85 f6
RSP: 0018:ffffc900001f0398 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff8f1954a6 RCX: ffff888023e71e00
RDX: 0000000000000100 RSI: ffffffff81de7c6d RDI: ffffffff81de7c69
RBP: ffffc900001f04b8 R08: ffffc900001f0530 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000100 R12: ffffffff8f1954ab
R13: ffffc900001f0468 R14: 0000000000000002 R15: dffffc0000000000
FS: 00007faaf2aef6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffc846c2f80 CR3: 000000005d145000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:329
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook+0x6a/0x4d0 mm/slab.h:767
slab_alloc_node mm/slub.c:3495 [inline]
slab_alloc mm/slub.c:3503 [inline]
__kmem_cache_alloc_lru mm/slub.c:3510 [inline]
kmem_cache_alloc+0x17e/0x2c0 mm/slub.c:3519
skb_clone+0x1eb/0x370 net/core/skbuff.c:1912
hsr_forward_do net/hsr/hsr_forward.c:-1 [inline]
hsr_forward_skb+0xefd/0x20b0 net/hsr/hsr_forward.c:626
send_hsr_supervision_frame+0x5fb/0xb90 net/hsr/hsr_device.c:346
hsr_announce+0x198/0x350 net/hsr/hsr_device.c:402
call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x570/0x810 kernel/time/timer.c:2023
run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
handle_softirqs+0x27d/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xc0/0x120 kernel/locking/spinlock.c:194
Code: c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f7 44 24 20 00 02 00 00 41 c6 04 07 f8 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 4b e4 ce f6 65 8b 05 1c 33 76 75 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc9000374f6a0 EFLAGS: 00000206
RAX: dffffc0000000004 RBX: 0000000000000a06 RCX: d51b087194bf7e00
RDX: dffffc0000000000 RSI: ffffffff8acacb60 RDI: 0000000000000001
RBP: ffffc9000374f730 R08: ffffffff911bc5ff R09: 1ffffffff22378bf
R10: dffffc0000000000 R11: fffffbfff22378c0 R12: dffffc0000000000
R13: ffff8880225c6038 R14: ffffffff97490af0 R15: 1ffff920006e9ed4
debug_object_activate+0x307/0x500 lib/debugobjects.c:727
debug_rcu_head_queue kernel/rcu/rcu.h:227 [inline]
__call_rcu_common kernel/rcu/tree.c:2706 [inline]
call_rcu+0xa6/0x900 kernel/rcu/tree.c:2837
thread_stack_delayed_free kernel/fork.c:232 [inline]
free_thread_stack kernel/fork.c:338 [inline]
release_task_stack kernel/fork.c:591 [inline]
put_task_stack+0x147/0x200 kernel/fork.c:598
finish_task_switch+0x440/0x8f0 kernel/sched/core.c:5288
context_switch kernel/sched/core.c:5384 [inline]
__schedule+0x15b6/0x4660 kernel/sched/core.c:6700
preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6867
preempt_schedule+0xc0/0xd0 kernel/sched/core.c:6891
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0x111/0x120 kernel/locking/spinlock.c:194
__do_sys_perf_event_open kernel/events/core.c:12950 [inline]
__se_sys_perf_event_open+0x1849/0x1c60 kernel/events/core.c:12601
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7faaf1b9ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007faaf2aef028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007faaf1e15fa0 RCX: 00007faaf1b9ce59
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480
RBP: 00007faaf1c32e6f R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007faaf1e16038 R14: 00007faaf1e15fa0 R15: 00007fff2b4bc2c8