rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (1 GPs behind) idle=be84/1/0x4000000000000000 softirq=83174/83175 fqs=3708
rcu: hardirqs softirqs csw/system
rcu: number: 1294607 0 0
rcu: cputime: 18862 33626 44 ==> 52490(ms)
rcu: (t=10500 jiffies g=110325 q=728 ncpus=2)
CPU: 1 PID: 22327 Comm: syz.0.4325 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:seqcount_lockdep_reader_access+0x19a/0x1d0 include/linux/seqlock.h:105
Code: 00 4d 85 e4 75 16 e8 95 c6 0f 00 eb 15 e8 8e c6 0f 00 e8 19 ca 0e 09 4d 85 e4 74 ea e8 7f c6 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:ffffc900001ef4a0 EFLAGS: 00000246
RAX: ffffffff81775b51 RBX: 0000000000000000 RCX: ffff888031175a00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900001ef558 R08: ffffffff911c45c7 R09: 1ffffffff22388b8
R10: dffffc0000000000 R11: fffffbfff22388b9 R12: 0000000000000200
R13: 000001fb63109b96 R14: 1ffff9200003de94 R15: dffffc0000000000
FS: 00007f0422c2c6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 00000000488fc000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000200000000300
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]
net_timestamp_set net/core/dev.c:2207 [inline]
dev_queue_xmit_nit+0x8ce/0xbb0 net/core/dev.c:2357
xmit_one net/core/dev.c:3628 [inline]
dev_hard_start_xmit+0x148/0x740 net/core/dev.c:3648
sch_direct_xmit+0x25e/0x4c0 net/sched/sch_generic.c:345
__dev_xmit_skb net/core/dev.c:3869 [inline]
__dev_queue_xmit+0x165d/0x3660 net/core/dev.c:4404
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]
ip_finish_output2+0xcec/0x11e0 net/ipv4/ip_output.c:235
NF_HOOK_COND include/linux/netfilter.h:293 [inline]
ip_output+0x2a1/0x3b0 net/ipv4/ip_output.c:436
dst_output include/net/dst.h:467 [inline]
ip_local_out net/ipv4/ip_output.c:129 [inline]
__ip_queue_xmit+0x1049/0x1950 net/ipv4/ip_output.c:540
__tcp_transmit_skb+0x1d6b/0x33f0 net/ipv4/tcp_output.c:1425
tcp_ack_snd_check net/ipv4/tcp_input.c:5736 [inline]
tcp_rcv_established+0xb06/0x1d20 net/ipv4/tcp_input.c:6182
tcp_v4_do_rcv+0x4ed/0xb80 net/ipv4/tcp_ipv4.c:1735
tcp_v4_rcv+0x23bf/0x2af0 net/ipv4/tcp_ipv4.c:2167
ip_protocol_deliver_rcu+0x20e/0x3f0 net/ipv4/ip_input.c:205
ip_local_deliver_finish+0x2ca/0x510 net/ipv4/ip_input.c:233
NF_HOOK+0x32d/0x3b0 include/linux/netfilter.h:304
dst_input include/net/dst.h:477 [inline]
ip_sublist_rcv_finish net/ipv4/ip_input.c:580 [inline]
ip_list_rcv_finish net/ipv4/ip_input.c:631 [inline]
ip_sublist_rcv+0xa4c/0xd70 net/ipv4/ip_input.c:639
ip_list_rcv+0x3f2/0x440 net/ipv4/ip_input.c:674
__netif_receive_skb_list_ptype net/core/dev.c:5677 [inline]
__netif_receive_skb_list_core+0x583/0x750 net/core/dev.c:5725
__netif_receive_skb_list net/core/dev.c:5777 [inline]
netif_receive_skb_list_internal+0x943/0xca0 net/core/dev.c:5868
gro_normal_list include/net/gro.h:451 [inline]
gro_normal_one include/net/gro.h:464 [inline]
napi_skb_finish net/core/gro.c:575 [inline]
napi_gro_receive+0x565/0xb00 net/core/gro.c:605
receive_buf+0x2203/0x3820 drivers/net/virtio_net.c:1870
virtnet_receive drivers/net/virtio_net.c:2155 [inline]
virtnet_poll+0x5dd/0x1280 drivers/net/virtio_net.c:2229
__napi_poll+0xc0/0x460 net/core/dev.c:6638
napi_poll net/core/dev.c:6705 [inline]
net_rx_action+0x616/0xc40 net/core/dev.c:6841
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:preempt_schedule_irq+0xba/0x150 kernel/sched/core.c:7010
Code: 00 00 43 c6 44 37 04 f8 74 0b 0f 0b 48 f7 03 08 00 00 00 74 6f bf 01 00 00 00 e8 a1 1b ce f6 e8 cc 28 ff f6 fb bf 01 00 00 00 f1 b4 ff ff 43 c6 44 37 08 00 48 c7 44 24 40 00 00 00 00 9c 8f
RSP: 0018:ffffc9000ff7fbc0 EFLAGS: 00000282
RAX: 3ef43108f79f0900 RBX: 0000000000000000 RCX: 3ef43108f79f0900
RDX: dffffc0000000000 RSI: ffffffff8acac9e0 RDI: 0000000000000001
RBP: ffffc9000ff7fc70 R08: ffffffff911c45ff R09: 1ffffffff22388bf
R10: dffffc0000000000 R11: fffffbfff22388c0 R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92001feff78
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:mutex_unlock+0x8/0x10 kernel/locking/mutex.c:543
Code: 48 8b 4c 24 18 80 e1 07 80 c1 03 38 c1 0f 8c d5 fe ff ff 48 8b 7c 24 18 e8 25 9e 50 f7 e9 c6 fe ff ff f3 0f 1e fa 48 8b 34 24 06 66 0f 1f 44 00 00 f3 0f 1e fa 55 48 89 e5 41 57 41 56 41 55
RSP: 0018:ffffc9000ff7fd38 EFLAGS: 00000246
RAX: 3ef43108f79f0900 RBX: ffff88805e430c00 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffffff81af2a38 RDI: ffff88805e430c40
RBP: ffffc9000ff7ff10 R08: ffffffff911c45ff R09: 1ffffffff22388bf
R10: dffffc0000000000 R11: fffffbfff22388c0 R12: 0000000000000000
R13: 1ffff92001feffb8 R14: ffff888037f03f20 R15: ffff888031175a00
__do_sys_perf_event_open kernel/events/core.c:12960 [inline]
__se_sys_perf_event_open+0x1848/0x1c50 kernel/events/core.c:12609
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: 0033:0x7f0421d9c819
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:00007f0422c2c028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f0422015fa0 RCX: 00007f0421d9c819
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000400
RBP: 00007f0421e32c91 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0422016038 R14: 00007f0422015fa0 R15: 00007ffc950a7e38