rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (1 GPs behind) idle=83e4/1/0x4000000000000000 softirq=28611/28612 fqs=5208
rcu: hardirqs softirqs csw/system
rcu: number: 1306048 0 0
rcu: cputime: 18088 34390 73 ==> 52500(ms)
rcu: (t=10502 jiffies g=35881 q=1475 ncpus=2)
CPU: 0 PID: 7945 Comm: syz.5.569 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:deref_stack_reg arch/x86/kernel/unwind_orc.c:-1 [inline]
RIP: 0010:unwind_next_frame+0x15fc/0x2970 arch/x86/kernel/unwind_orc.c:585
Code: 97 c1 4c 39 f8 0f 96 c0 84 c1 0f 84 7f 08 00 00 e8 d9 f1 4a 00 48 8b 6c 24 10 4c 8b 7c 24 38 4c 89 f7 e8 37 20 00 00 49 89 c6 <48> 8b 44 24 40 42 80 3c 28 00 48 8b 5c 24 20 74 08 48 89 df e8 5b
RSP: 0018:ffffc90000006f18 EFLAGS: 00000246
RAX: ffffffff81dceefe RBX: ffffc90000000000 RCX: ffff88802c563c00
RDX: 0000000000000100 RSI: 0000000000000002 RDI: ffffc90000007128
RBP: ffffc90000007038 R08: ffff88802c563c00 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000100 R12: ffffc90000006fe8
R13: dffffc0000000000 R14: ffffffff81dceefe R15: ffffffff8ed0bbd4
FS: 00007f2c121b36c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000030580000 CR4: 00000000003506f0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff1 DR7: 0000000000000600
Call Trace:
arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
kasan_save_free_info+0x2e/0x50 mm/kasan/generic.c:522
____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:237
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1811 [inline]
slab_free_freelist_hook+0x130/0x1b0 mm/slub.c:1837
slab_free mm/slub.c:3830 [inline]
kmem_cache_free+0xf8/0x280 mm/slub.c:3852
nlmon_xmit+0xb0/0x100 drivers/net/nlmon.c:15
__netdev_start_xmit include/linux/netdevice.h:4943 [inline]
netdev_start_xmit include/linux/netdevice.h:4957 [inline]
xmit_one net/core/dev.c:3645 [inline]
dev_hard_start_xmit+0x246/0x740 net/core/dev.c:3661
__dev_queue_xmit+0x1a55/0x3580 net/core/dev.c:4451
neigh_output include/net/neighbour.h:543 [inline]
ip6_finish_output2+0xe2e/0x1650 net/ipv6/ip6_output.c:141
dst_output include/net/dst.h:467 [inline]
NF_HOOK include/linux/netfilter.h:304 [inline]
ndisc_send_skb+0xbed/0x14b0 net/ipv6/ndisc.c:513
addrconf_rs_timer+0x2bc/0x600 net/ipv6/addrconf.c:4024
call_timer_fn+0x16e/0x530 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x52d/0x7d0 kernel/time/timer.c:2023
run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
handle_softirqs+0x280/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xc7/0x190 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:preempt_schedule_irq+0xb0/0x140 kernel/sched/core.c:7010
Code: 44 24 20 f6 44 24 21 02 74 0b 0f 0b 48 f7 03 08 00 00 00 74 63 bf 01 00 00 00 e8 2b 35 eb f6 e8 76 c4 1b f7 fb bf 01 00 00 00 db b5 ff ff 48 c7 44 24 40 00 00 00 00 9c 8f 44 24 40 8b 44 24
RSP: 0018:ffffc9000b2c7980 EFLAGS: 00000282
RAX: 6be70298357cfd00 RBX: 0000000000000000 RCX: 6be70298357cfd00
RDX: dffffc0000000000 RSI: ffffffff8aaabce0 RDI: 0000000000000001
RBP: ffffc9000b2c7a20 R08: ffffffff90d965ff R09: 1ffffffff21b2cbf
R10: dffffc0000000000 R11: fffffbfff21b2cc0 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92001658f30
irqentry_exit+0x67/0x70 kernel/entry/common.c:438
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
RIP: 0010:smp_call_function_single+0x404/0x580 kernel/smp.c:654
Code: ee 0a 00 44 8b 24 24 bf 01 00 00 00 e8 45 c4 e0 ff 65 8b 1d 96 f9 88 7e 31 ff 89 de e8 75 f2 0a 00 85 db 74 60 e8 bc ee 0a 00 <48> c7 44 24 20 0e 36 e0 45 43 c7 04 2e 00 00 00 00 4b c7 44 2e 08
RSP: 0018:ffffc9000b2c7ae0 EFLAGS: 00000246
RAX: ffffffff817abca4 RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9001abcd000 RSI: 000000000000c7c3 RDI: 000000000000c7c4
RBP: ffffc9000b2c7bd0 R08: ffffffff90d965ff R09: 1ffffffff21b2cbf
R10: dffffc0000000000 R11: fffffbfff21b2cc0 R12: 0000000000000000
R13: dffffc0000000000 R14: 1ffff92001658f60 R15: 1ffff92001658f60
task_function_call kernel/events/core.c:120 [inline]
perf_install_in_context+0x591/0x8e0 kernel/events/core.c:2948
__do_sys_perf_event_open kernel/events/core.c:12915 [inline]
__se_sys_perf_event_open+0x17fa/0x1c20 kernel/events/core.c:12567
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: 0033:0x7f2c1138f749
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:00007f2c121b3038 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f2c115e6180 RCX: 00007f2c1138f749
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007f2c11413f91 R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2c115e6218 R14: 00007f2c115e6180 R15: 00007ffd0b529588