rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (10500 ticks this GP) idle=189c/1/0x4000000000000000 softirq=14959/14959 fqs=5188
rcu: hardirqs softirqs csw/system
rcu: number: 1371369 0 0
rcu: cputime: 17518 34961 64 ==> 52500(ms)
rcu: (t=10502 jiffies g=14813 q=1332 ncpus=2)
CPU: 1 PID: 6364 Comm: syz.0.178 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:seqcount_lockdep_reader_access+0x19a/0x1d0 include/linux/seqlock.h:105
Code: 00 4d 85 e4 75 16 e8 45 c3 0f 00 eb 15 e8 3e c3 0f 00 e8 59 ea 0c 09 4d 85 e4 74 ea e8 2f c3 0f 00 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 3e 00 00 00 00 43 c7 44 3e 08 00 00 00 00 65 48 8b 04 25
RSP: 0018:ffffc900001ef920 EFLAGS: 00000246
RAX: ffffffff81775181 RBX: 0000000000000000 RCX: ffff888029e7bc00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001ef9d8 R08: ffffffff911bf5f7 R09: 1ffffffff2237ebe
R10: dffffc0000000000 R11: fffffbfff2237ebf R12: 0000000000000200
R13: 000001fb63109b96 R14: 1ffff9200003df24 R15: dffffc0000000000
FS: 00007fddce3db6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555574f2f4e8 CR3: 0000000079a55000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
timekeeping_get_delta kernel/time/timekeeping.c:254 [inline]
timekeeping_get_ns kernel/time/timekeeping.c:388 [inline]
ktime_get_with_offset+0x103/0x330 kernel/time/timekeeping.c:891
ktime_get_real include/linux/timekeeping.h:79 [inline]
netif_rx_internal+0x344/0x4e0 net/core/dev.c:5158
__netif_rx+0x78/0xc0 net/core/dev.c:5201
veth_forward_skb drivers/net/veth.c:325 [inline]
veth_xmit+0x550/0x9f0 drivers/net/veth.c:378
__netdev_start_xmit include/linux/netdevice.h:4943 [inline]
netdev_start_xmit include/linux/netdevice.h:4957 [inline]
xmit_one net/core/dev.c:3658 [inline]
dev_hard_start_xmit+0x246/0x740 net/core/dev.c:3674
__dev_queue_xmit+0x1ac2/0x36b0 net/core/dev.c:4464
dev_queue_xmit include/linux/netdevice.h:3113 [inline]
br_dev_queue_push_xmit+0x6b3/0x870 net/bridge/br_forward.c:53
NF_HOOK+0x351/0x3e0 include/linux/netfilter.h:304
br_forward_finish+0xd3/0x130 net/bridge/br_forward.c:66
NF_HOOK+0x351/0x3e0 include/linux/netfilter.h:304
__br_forward+0x433/0x610 net/bridge/br_forward.c:115
br_dev_xmit+0x127c/0x1900 net/bridge/br_device.c:106
__netdev_start_xmit include/linux/netdevice.h:4943 [inline]
netdev_start_xmit include/linux/netdevice.h:4957 [inline]
xmit_one net/core/dev.c:3658 [inline]
dev_hard_start_xmit+0x246/0x740 net/core/dev.c:3674
__dev_queue_xmit+0x1ac2/0x36b0 net/core/dev.c:4464
dev_queue_xmit include/linux/netdevice.h:3113 [inline]
neigh_hh_output include/net/neighbour.h:527 [inline]
neigh_output include/net/neighbour.h:541 [inline]
ip6_finish_output2+0xe06/0x1630 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+0xc26/0x14f0 net/ipv6/ndisc.c:513
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 40 83 30 09 e8 7b 23 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:ffffc9000552f898 EFLAGS: 00000282
RAX: 86ec8decffb51700 RBX: 0000000000000000 RCX: 86ec8decffb51700
RDX: dffffc0000000000 RSI: ffffffff8acac900 RDI: ffffffff8b1c81e0
RBP: ffffc9000552f8f0 R08: ffffffff911bf5a7 R09: 1ffffffff2237eb4
R10: dffffc0000000000 R11: fffffbfff2237eb5 R12: ffff888029e7bc00
R13: dffffc0000000000 R14: ffff88802bf98000 R15: ffff8880b8f3cac8
context_switch kernel/sched/core.c:5384 [inline]
__schedule+0x155b/0x45a0 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 include/linux/spinlock_api_smp.h:143 [inline]
_raw_spin_unlock+0x3a/0x40 kernel/locking/spinlock.c:186
__mutex_unlock_slowpath+0x654/0x6c0 kernel/locking/mutex.c:949
__do_sys_perf_event_open kernel/events/core.c:12918 [inline]
__se_sys_perf_event_open+0x1848/0x1c50 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: 0033:0x7fddcd59aeb9
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:00007fddce3db028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fddcd815fa0 RCX: 00007fddcd59aeb9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007fddcd608c1f R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fddcd816038 R14: 00007fddcd815fa0 R15: 00007ffc83871a08