rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (1 GPs behind) idle=3ca4/1/0x4000000000000000 softirq=12955/12957 fqs=4301
rcu: hardirqs softirqs csw/system
rcu: number: 1438913 0 0
rcu: cputime: 17525 34953 72 ==> 52480(ms)
rcu: (t=10500 jiffies g=12573 q=1857 ncpus=2)
CPU: 1 PID: 5930 Comm: syz.3.20 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:seqcount_lockdep_reader_access+0x19a/0x1d0 include/linux/seqlock.h:105
Code: 00 4d 85 e4 75 16 e8 05 ca 0f 00 eb 15 e8 fe c9 0f 00 e8 09 b2 17 09 4d 85 e4 74 ea e8 ef c9 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:ffffc900001ef800 EFLAGS: 00000246
RAX: ffffffff8177a881 RBX: 0000000000000000 RCX: ffff888026609e00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001ef8b8 R08: ffffffff911ee607 R09: 1ffffffff223dcc0
R10: dffffc0000000000 R11: fffffbfff223dcc1 R12: 0000000000000200
R13: 000001fb63109b96 R14: 1ffff9200003df00 R15: dffffc0000000000
FS: 00005555861ad500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2cf63fff CR3: 0000000075d31000 CR4: 00000000003506e0
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+0x33d/0x4e0 net/core/dev.c:5166
__netif_rx+0x78/0xc0 net/core/dev.c:5209
veth_forward_skb drivers/net/veth.c:325 [inline]
veth_xmit+0x57a/0xa30 drivers/net/veth.c:378
__netdev_start_xmit include/linux/netdevice.h:4942 [inline]
netdev_start_xmit include/linux/netdevice.h:4956 [inline]
xmit_one net/core/dev.c:3649 [inline]
dev_hard_start_xmit+0x269/0x790 net/core/dev.c:3665
__dev_queue_xmit+0x198c/0x3630 net/core/dev.c:4467
dev_queue_xmit include/linux/netdevice.h:3117 [inline]
br_dev_queue_push_xmit+0x6b7/0x880 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
deliver_clone net/bridge/br_forward.c:131 [inline]
maybe_deliver+0xb5/0x150 net/bridge/br_forward.c:191
br_flood+0x317/0x670 net/bridge/br_forward.c:237
br_dev_xmit+0x10f3/0x18a0 net/bridge/br_device.c:-1
__netdev_start_xmit include/linux/netdevice.h:4942 [inline]
netdev_start_xmit include/linux/netdevice.h:4956 [inline]
xmit_one net/core/dev.c:3649 [inline]
dev_hard_start_xmit+0x269/0x790 net/core/dev.c:3665
__dev_queue_xmit+0x198c/0x3630 net/core/dev.c:4467
dev_queue_xmit include/linux/netdevice.h:3117 [inline]
neigh_hh_output include/net/neighbour.h:531 [inline]
neigh_output include/net/neighbour.h:545 [inline]
ip6_finish_output2+0xdf7/0x1620 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+0xbb9/0x1480 net/ipv6/ndisc.c:513
addrconf_rs_timer+0x36b/0x640 net/ipv6/addrconf.c:4036
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:__preempt_count_add arch/x86/include/asm/preempt.h:80 [inline]
RIP: 0010:rcu_is_watching+0x0/0xb0 kernel/rcu/tree.c:699
Code: 84 1d ff ff ff eb 8a e8 0e 20 1e 09 48 c7 c7 00 86 13 8d 4c 89 f6 e8 7f b2 f5 02 e9 44 ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 0f 1e fa 41 57 41 56 53 65 ff 05 a8 7e 92 7e e8 cb 35 1e 09 89
RSP: 0018:ffffc900034dfcf0 EFLAGS: 00000202
RAX: ffffffff81f6eb22 RBX: dffffc0000000000 RCX: 0000000000000000
RDX: ffff888026609e00 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc900034dff10 R08: dffffc0000000000 R09: 1ffffffff223dca0
R10: dffffc0000000000 R11: fffffbfff223dca1 R12: 0000000000000001
R13: 0000000000000004 R14: ffffffff81f6eaf0 R15: ffff88801f2a70c0
rcu_read_lock_sched include/linux/rcupdate.h:879 [inline]
fd_install+0x9c/0x4e0 fs/file.c:595
__do_sys_perf_event_open kernel/events/core.c:12970 [inline]
__se_sys_perf_event_open+0x19fe/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: 0033:0x7f254179e0d9
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:00007fff098525a8 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f2541a25fa0 RCX: 00007f254179e0d9
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007f2541835024 R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2541a25fac R14: 00007f2541a25fa0 R15: 00007f2541a25fa0