rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (10268 ticks this GP) idle=5fb4/1/0x4000000000000000 softirq=131019/133827 fqs=5242
rcu: hardirqs softirqs csw/system
rcu: number: 1051864 9 0
rcu: cputime: 17169 35320 49 ==> 52510(ms)
rcu: (t=10503 jiffies g=164677 q=2873 ncpus=2)
CPU: 0 PID: 29797 Comm: syz.3.6771 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026
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 19 0c 0d 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:ffffc90000006420 EFLAGS: 00000246
RAX: ffffffff81775071 RBX: 0000000000000000 RCX: ffff888035e78000
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900000064d8 R08: ffffffff911bf5ff R09: 1ffffffff2237ebf
R10: dffffc0000000000 R11: fffffbfff2237ec0 R12: 0000000000000200
R13: 1ffff92000000cac R14: 1ffff92000000c84 R15: dffffc0000000000
FS: 00007fc8a2cba6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000011000 CR3: 000000006d77c000 CR4: 00000000003506f0
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:5128
__netif_rx+0x78/0xc0 net/core/dev.c:5171
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:3632 [inline]
dev_hard_start_xmit+0x246/0x740 net/core/dev.c:3648
__dev_queue_xmit+0x1ac2/0x36b0 net/core/dev.c:4438
dev_queue_xmit include/linux/netdevice.h:3113 [inline]
br_dev_queue_push_xmit+0x6b3/0x870 net/bridge/br_forward.c:53
NF_HOOK+0x66e/0x700 include/linux/netfilter.h:304
br_nf_post_routing+0xb41/0xfb0 net/bridge/br_netfilter_hooks.c:977
nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]
nf_hook_slow+0xbd/0x200 net/netfilter/core.c:626
nf_hook include/linux/netfilter.h:259 [inline]
NF_HOOK+0x23e/0x3e0 include/linux/netfilter.h:302
br_forward_finish+0xd3/0x130 net/bridge/br_forward.c:66
br_nf_hook_thresh net/bridge/br_netfilter_hooks.c:1184 [inline]
br_nf_forward_finish+0xa51/0xe80 net/bridge/br_netfilter_hooks.c:684
NF_HOOK+0x66e/0x700 include/linux/netfilter.h:304
br_nf_forward_ip+0xcc1/0x1110 net/bridge/br_netfilter_hooks.c:754
nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]
nf_hook_slow+0xbd/0x200 net/netfilter/core.c:626
nf_hook include/linux/netfilter.h:259 [inline]
NF_HOOK+0x23e/0x3e0 include/linux/netfilter.h:302
__br_forward+0x433/0x610 net/bridge/br_forward.c:115
br_handle_frame_finish+0x149b/0x19b0 net/bridge/br_input.c:215
br_nf_hook_thresh+0x3cd/0x4a0 net/bridge/br_netfilter_hooks.c:1184
br_nf_pre_routing_finish_ipv6+0x9dc/0xd00 net/bridge/br_netfilter_ipv6.c:-1
NF_HOOK include/linux/netfilter.h:304 [inline]
br_nf_pre_routing_ipv6+0x349/0x6b0 net/bridge/br_netfilter_ipv6.c:184
nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:277 [inline]
br_handle_frame+0x1245/0x14d0 net/bridge/br_input.c:424
__netif_receive_skb_core+0xfab/0x3af0 net/core/dev.c:5515
__netif_receive_skb_one_core net/core/dev.c:5619 [inline]
__netif_receive_skb+0x74/0x290 net/core/dev.c:5735
process_backlog+0x391/0x6f0 net/core/dev.c:6063
__napi_poll+0xc0/0x460 net/core/dev.c:6625
napi_poll net/core/dev.c:6692 [inline]
net_rx_action+0x616/0xc40 net/core/dev.c:6828
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:ffffc90003387758 EFLAGS: 00000282
RAX: 62e29148627cfc00 RBX: 0000000000000000 RCX: 62e29148627cfc00
RDX: dffffc0000000000 RSI: ffffffff8acac900 RDI: ffffffff8b1c81e0
RBP: ffffc900033877b0 R08: ffffffff911bf5ff R09: 1ffffffff2237ebf
R10: dffffc0000000000 R11: fffffbfff2237ec0 R12: ffff888035e78000
R13: dffffc0000000000 R14: ffff88802bd51e00 R15: ffff8880b8e3cac8
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
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: 0033:0x7fc8a1d9bf79
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:00007fc8a2cba028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fc8a2015fa0 RCX: 00007fc8a1d9bf79
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480
RBP: 00007fc8a1e327e0 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc8a2016038 R14: 00007fc8a2015fa0 R15: 00007ffe2ba1f468