rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (10086 ticks this GP) idle=49fc/1/0x4000000000000000 softirq=11224/16370 fqs=4640
rcu: hardirqs softirqs csw/system
rcu: number: 1498168 14 0
rcu: cputime: 14166 38312 41 ==> 52480(ms)
rcu: (t=10500 jiffies g=8789 q=1914 ncpus=2)
CPU: 1 PID: 5934 Comm: syz.0.22 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:seqcount_lockdep_reader_access+0x17f/0x1c0 include/linux/seqlock.h:105
Code: 00 4d 85 e4 75 16 e8 90 90 0f 00 eb 15 e8 89 90 0f 00 e8 14 77 f1 08 4d 85 e4 74 ea e8 7a 90 0f 00 fb 48 c7 04 24 0e 36 e0 45 <4b> c7 04 3e 00 00 00 00 66 43 c7 44 3e 09 00 00 43 c6 44 3e 0b 00
RSP: 0018:ffffc900001ef400 EFLAGS: 00000246
RAX: ffffffff81760046 RBX: 0000000000000000 RCX: ffff8880761d5a00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001ef4b8 R08: ffffffff90d9460f R09: 1ffffffff21b28c1
R10: dffffc0000000000 R11: fffffbfff21b28c2 R12: 0000000000000200
R13: 000001fb7086095e R14: 1ffff9200003de80 R15: dffffc0000000000
FS: 000055555a2ad500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000028dbc000 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+0x34a/0x4e0 net/core/dev.c:5115
__netif_rx+0x78/0xc0 net/core/dev.c:5158
veth_forward_skb drivers/net/veth.c:321 [inline]
veth_xmit+0x550/0x9f0 drivers/net/veth.c:374
__netdev_start_xmit include/linux/netdevice.h:4943 [inline]
netdev_start_xmit include/linux/netdevice.h:4957 [inline]
xmit_one net/core/dev.c:3619 [inline]
dev_hard_start_xmit+0x246/0x740 net/core/dev.c:3635
__dev_queue_xmit+0x1a64/0x35a0 net/core/dev.c:4425
dev_queue_xmit include/linux/netdevice.h:3113 [inline]
br_dev_queue_push_xmit+0x6a6/0x850 net/bridge/br_forward.c:53
NF_HOOK+0x613/0x6a0 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+0x213/0x3d0 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:-1 [inline]
br_nf_forward_finish+0xa33/0xe50 net/bridge/br_netfilter_hooks.c:684
NF_HOOK+0x613/0x6a0 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+0x213/0x3d0 include/linux/netfilter.h:302
__br_forward+0x41f/0x600 net/bridge/br_forward.c:115
br_handle_frame_finish+0x143d/0x1950 net/bridge/br_input.c:215
br_nf_hook_thresh+0x3b6/0x480 net/bridge/br_netfilter_hooks.c:1184
br_nf_pre_routing_finish_ipv6+0x9e3/0xd90 net/bridge/br_netfilter_ipv6.c:-1
NF_HOOK include/linux/netfilter.h:304 [inline]
br_nf_pre_routing_ipv6+0x34d/0x680 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+0x957/0x14c0 net/bridge/br_input.c:424
__netif_receive_skb_core+0xf6b/0x3ac0 net/core/dev.c:5502
__netif_receive_skb_one_core net/core/dev.c:5606 [inline]
__netif_receive_skb+0x74/0x290 net/core/dev.c:5722
process_backlog+0x380/0x6e0 net/core/dev.c:6050
__napi_poll+0xc0/0x460 net/core/dev.c:6612
napi_poll net/core/dev.c:6679 [inline]
net_rx_action+0x5ea/0xbf0 net/core/dev.c:6815
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:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0xa9/0x110 kernel/locking/spinlock.c:194
Code: 74 05 e8 0a d9 1a f7 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 f6 44 24 21 02 75 4b f7 c3 00 02 00 00 74 01 fb bf 01 00 00 00 e2 53 ea f6 65 8b 05 d3 9a 92 75 85 c0 74 3c 48 c7 04 24 0e 36
RSP: 0018:ffffc900035475e0 EFLAGS: 00000206
RAX: a5cde8297fe06900 RBX: 0000000000000a02 RCX: a5cde8297fe06900
RDX: dffffc0000000000 RSI: ffffffff8aaabce0 RDI: 0000000000000001
RBP: ffffc90003547678 R08: ffffffff90d9460f R09: 1ffffffff21b28c1
R10: dffffc0000000000 R11: fffffbfff21b28c2 R12: dffffc0000000000
R13: ffff888072972ef0 R14: ffffffff8d3eb7c0 R15: 1ffff920006a8ebc
__stack_depot_save+0x560/0x630 lib/stackdepot.c:439
save_stack+0x105/0x1f0 mm/page_owner.c:129
__reset_page_owner+0x4e/0x190 mm/page_owner.c:149
reset_page_owner include/linux/page_owner.h:24 [inline]
free_pages_prepare mm/page_alloc.c:1154 [inline]
free_unref_page_prepare+0x7ce/0x8e0 mm/page_alloc.c:2336
free_unref_page+0x32/0x2e0 mm/page_alloc.c:2429
mm_free_pgd kernel/fork.c:809 [inline]
__mmdrop+0xb4/0x3d0 kernel/fork.c:925
mmdrop include/linux/sched/mm.h:54 [inline]
mmdrop_sched include/linux/sched/mm.h:82 [inline]
mmdrop_lazy_tlb_sched include/linux/sched/mm.h:109 [inline]
finish_task_switch+0x3e0/0x920 kernel/sched/core.c:5279
context_switch kernel/sched/core.c:5383 [inline]
__schedule+0x14da/0x44d0 kernel/sched/core.c:6699
preempt_schedule_common+0x82/0xc0 kernel/sched/core.c:6866
preempt_schedule+0xab/0xc0 kernel/sched/core.c:6890
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
_raw_spin_unlock_irqrestore+0xfa/0x110 kernel/locking/spinlock.c:194
__do_sys_perf_event_open kernel/events/core.c:12916 [inline]
__se_sys_perf_event_open+0x1802/0x1c20 kernel/events/core.c:12567
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc6a278f749
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:00007ffc3b7a13f8 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fc6a29e5fa0 RCX: 00007fc6a278f749
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000140
RBP: 00007fc6a2813f91 R08: 0000000000000002 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc6a29e5fa0 R14: 00007fc6a29e5fa0 R15: 0000000000000005