rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (1 GPs behind) idle=3904/1/0x4000000000000000 softirq=30220/30221 fqs=5192
rcu: hardirqs softirqs csw/system
rcu: number: 1347912 0 0
rcu: cputime: 18288 34191 71 ==> 52510(ms)
rcu: (t=10503 jiffies g=37065 q=584 ncpus=2)
CPU: 1 PID: 9461 Comm: syz.0.1229 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:check_kcov_mode kernel/kcov.c:182 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x1f/0x60 kernel/kcov.c:216
Code: 89 de 5b e9 53 59 57 00 cc cc cc f3 0f 1e fa 48 8b 04 24 65 48 8b 0d 10 a2 7c 7e 65 8b 15 11 a2 7c 7e 81 e2 00 01 ff 00 74 11 <81> fa 00 01 00 00 75 35 83 b9 1c 16 00 00 00 74 2c 8b 91 f8 15 00
RSP: 0018:ffffc900001f04d0 EFLAGS: 00000206
RAX: ffffffff813b3647 RBX: ffffc900001f0660 RCX: ffff888023d98000
RDX: 0000000000000100 RSI: ffffffff893b8a75 RDI: ffffc900001f05a8
RBP: ffffc900001f0630 R08: ffffc900001f0670 R09: 0000000000000004
R10: 0000000000000004 R11: 0000000000000100 R12: ffffc900001f05a8
R13: dffffc0000000000 R14: ffffffff8175b740 R15: ffffc900001f05a8
FS: 00007f18ce7ab6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc9e3c0dff8 CR3: 0000000030262000 CR4: 00000000003506e0
DR0: 0000200000000300 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
unwind_next_frame+0x27/0x2970 arch/x86/kernel/unwind_orc.c:469
arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
ref_tracker_alloc+0x1b7/0x4c0 lib/ref_tracker.c:209
__netdev_tracker_alloc include/linux/netdevice.h:4110 [inline]
netdev_hold include/linux/netdevice.h:4139 [inline]
dst_init+0xd9/0x460 net/core/dst.c:52
dst_alloc+0x12e/0x170 net/core/dst.c:93
ip6_dst_alloc net/ipv6/route.c:344 [inline]
icmp6_dst_alloc+0x7b/0x400 net/ipv6/route.c:3316
ndisc_send_skb+0x44e/0x14f0 net/ipv6/ndisc.c:493
addrconf_rs_timer+0x2d5/0x630 net/ipv6/addrconf.c:4024
call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x542/0x800 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+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:finish_task_switch+0x26a/0x8f0 kernel/sched/core.c:5255
Code: 0f 84 33 01 00 00 48 85 db 0f 85 52 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 f0 a3 30 09 e8 8b 22 30 00 fb 4c 8b 65 c0 <49> 8d bc 24 f8 15 00 00 48 89 f8 48 c1 e8 03 42 0f b6 04 28 84 c0
RSP: 0018:ffffc900043d7618 EFLAGS: 00000286
RAX: a954803336128900 RBX: 0000000000000000 RCX: a954803336128900
RDX: dffffc0000000000 RSI: ffffffff8acac900 RDI: ffffffff8b1c81e0
RBP: ffffc900043d7670 R08: ffffffff911bf5ff R09: 1ffffffff2237ebf
R10: dffffc0000000000 R11: fffffbfff2237ec0 R12: ffff888023d98000
R13: dffffc0000000000 R14: ffff88802dd03c00 R15: ffff8880b8f3cac8
context_switch kernel/sched/core.c:5384 [inline]
__schedule+0x155b/0x45a0 kernel/sched/core.c:6700
preempt_schedule_irq+0xbf/0x150 kernel/sched/core.c:7010
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:preempt_schedule+0xbb/0xd0 kernel/sched/core.c:6891
Code: 29 48 c7 04 24 0e 36 e0 45 4a c7 04 33 00 00 00 00 65 48 8b 04 25 28 00 00 00 48 3b 44 24 58 75 10 48 8d 65 f0 5b 41 5e 5d c3 10 00 00 00 eb d0 e8 19 bc f7 ff 66 0f 1f 84 00 00 00 00 00 41
RSP: 0018:ffffc900043d7a00 EFLAGS: 00000206
RAX: dffffc0000000004 RBX: 1ffff9200087af40 RCX: 0000000000080000
RDX: ffffc9000d529000 RSI: 000000000000385b RDI: 000000000000385c
RBP: ffffc900043d7a78 R08: ffffffff911bf5ff R09: 1ffffffff2237ebf
R10: dffffc0000000000 R11: fffffbfff2237ec0 R12: 0000000000000000
R13: dffffc0000000000 R14: dffffc0000000000 R15: 1ffff9200087af60
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
smp_call_function_single+0x48d/0x5a0 kernel/smp.c:652
task_function_call kernel/events/core.c:120 [inline]
perf_install_in_context+0x5be/0x920 kernel/events/core.c:2948
__do_sys_perf_event_open kernel/events/core.c:12915 [inline]
__se_sys_perf_event_open+0x1836/0x1c50 kernel/events/core.c:12567
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f18cd99bf79
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:00007f18ce7ab028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f18cdc15fa0 RCX: 00007f18cd99bf79
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007f18cda327e0 R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f18cdc16038 R14: 00007f18cdc15fa0 R15: 00007ffd1385ec18