rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (10480 ticks this GP) idle=7574/1/0x4000000000000000 softirq=54478/54481 fqs=4999
rcu: hardirqs softirqs csw/system
rcu: number: 1249794 19 0
rcu: cputime: 15774 36715 33 ==> 52490(ms)
rcu: (t=10500 jiffies g=58765 q=2421 ncpus=2)
CPU: 1 PID: 11459 Comm: syz.4.1392 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__read_once_word_nocheck+0xc/0x10 include/asm-generic/rwonce.h:67
Code: 89 e1 80 e1 07 38 c1 0f 8c 5d fc ff ff 4c 89 e7 e8 89 25 a2 00 e9 50 fc ff ff 0f 1f 40 00 53 48 89 fb e8 47 b7 4a 00 48 8b 03 <5b> c3 cc cc f3 0f 1e fa 55 48 89 e5 41 57 41 56 41 55 41 54 53 48
RSP: 0018:ffffc900001ef308 EFLAGS: 00000246
RAX: ffffffff88f0d844 RBX: ffffc900001f0018 RCX: ffff8880235cbc00
RDX: 0000000000000100 RSI: 0000000000000002 RDI: ffffc900001f0018
RBP: ffffc900001ef438 R08: ffff8880235cbc00 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000100 R12: ffffc900001ef3e8
R13: dffffc0000000000 R14: ffffc900001f0018 R15: ffffffff8f511a18
FS: 00007efff40626c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000005d8ba000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
deref_stack_reg arch/x86/kernel/unwind_orc.c:406 [inline]
unwind_next_frame+0x15f9/0x2970 arch/x86/kernel/unwind_orc.c:585
arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:45 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:52
__kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:328
kasan_slab_alloc include/linux/kasan.h:188 [inline]
slab_post_alloc_hook+0x6e/0x4d0 mm/slab.h:767
slab_alloc_node mm/slub.c:3495 [inline]
slab_alloc mm/slub.c:3503 [inline]
__kmem_cache_alloc_lru mm/slub.c:3510 [inline]
kmem_cache_alloc+0x11e/0x2e0 mm/slub.c:3519
skb_clone+0x1eb/0x370 net/core/skbuff.c:1915
neigh_probe net/core/neighbour.c:1077 [inline]
__neigh_event_send+0xe9c/0x14c0 net/core/neighbour.c:1247
neigh_event_send_probe include/net/neighbour.h:467 [inline]
neigh_event_send include/net/neighbour.h:473 [inline]
neigh_resolve_output+0x19b/0x730 net/core/neighbour.c:1552
neigh_output include/net/neighbour.h:543 [inline]
ip_finish_output2+0xd21/0x11d0 net/ipv4/ip_output.c:235
dst_output include/net/dst.h:467 [inline]
ip_local_out net/ipv4/ip_output.c:129 [inline]
__ip_queue_xmit+0x10aa/0x1a10 net/ipv4/ip_output.c:535
__tcp_transmit_skb+0x1c97/0x32a0 net/ipv4/tcp_output.c:1422
tcp_validate_incoming+0xf13/0x2250 net/ipv4/tcp_input.c:5891
tcp_rcv_established+0x7d8/0x1cf0 net/ipv4/tcp_input.c:6156
tcp_v4_do_rcv+0x4ed/0xb80 net/ipv4/tcp_ipv4.c:1734
tcp_v4_rcv+0x2334/0x2a50 net/ipv4/tcp_ipv4.c:2166
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+0x303/0x390 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+0xa38/0xd20 net/ipv4/ip_input.c:639
ip_list_rcv+0x3e3/0x430 net/ipv4/ip_input.c:674
__netif_receive_skb_list_ptype net/core/dev.c:5651 [inline]
__netif_receive_skb_list_core+0x2cc/0x740 net/core/dev.c:5689
__netif_receive_skb_list net/core/dev.c:5751 [inline]
netif_receive_skb_list_internal+0x91b/0xc60 net/core/dev.c:5842
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:573 [inline]
napi_gro_receive+0x565/0xb00 net/core/gro.c:603
receive_buf+0x218c/0x3780 drivers/net/virtio_net.c:1870
virtnet_receive drivers/net/virtio_net.c:2155 [inline]
virtnet_poll+0x61f/0x1180 drivers/net/virtio_net.c:2229
__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:finish_task_switch+0x26a/0x920 kernel/sched/core.c:5254
Code: 0f 84 37 01 00 00 48 85 db 0f 85 56 01 00 00 0f 1f 44 00 00 4c 8b 75 d0 4c 89 e7 e8 80 ca 14 09 e8 4b a4 2f 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:ffffc9000c86f738 EFLAGS: 00000282
RAX: 9c0fb26ba51f2f00 RBX: 0000000000000000 RCX: 9c0fb26ba51f2f00
RDX: dffffc0000000000 RSI: ffffffff8aaabce0 RDI: ffffffff8afc6f80
RBP: ffffc9000c86f790 R08: ffffffff8e4a212f R09: 1ffffffff1c94425
R10: dffffc0000000000 R11: fffffbfff1c94426 R12: ffff8880235cbc00
R13: dffffc0000000000 R14: ffff88801f2bda00 R15: ffff8880b8f3cac8
context_switch kernel/sched/core.c:5383 [inline]
__schedule+0x14da/0x44d0 kernel/sched/core.c:6699
preempt_schedule_irq+0xb5/0x140 kernel/sched/core.c:7009
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:preempt_schedule+0x0/0xc0 kernel/sched/core.c:6883
Code: 4c 89 f7 e8 42 48 6d f7 eb af 66 0f 1f 00 bf 01 00 00 00 e8 72 b8 eb f6 e8 fd fd ff ff bf 01 00 00 00 e8 c3 b6 eb f6 c3 66 90 0f 1e fa 55 48 89 e5 41 56 53 48 83 e4 e0 48 83 ec 60 65 48 8b
RSP: 0018:ffffc9000c86fb10 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffff8880b8f3cd58 RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffffff8aaabce0 RDI: 00000000ffffffff
RBP: ffffc9000c86fb60 R08: ffffffff8e4a212f R09: 1ffffffff1c94425
R10: dffffc0000000000 R11: fffffbfff1c94426 R12: 0000000000000001
R13: dffffc0000000000 R14: 0000000000000001 R15: dffffc0000000000
preempt_schedule_thunk+0x1a/0x30 arch/x86/entry/thunk_64.S:45
class_preempt_destructor include/linux/preempt.h:478 [inline]
try_to_wake_up+0x756/0x1140 kernel/sched/core.c:4355
wake_up_process kernel/sched/core.c:4480 [inline]
wake_up_q+0xb6/0x100 kernel/sched/core.c:1031
futex_wake+0x40d/0x4b0 kernel/futex/waitwake.c:184
do_futex+0x35d/0x3e0 kernel/futex/syscalls.c:139
__do_sys_futex kernel/futex/syscalls.c:211 [inline]
__se_sys_futex+0x36f/0x3f0 kernel/futex/syscalls.c:192
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: 0033:0x7efff318f749
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:00007efff40620e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: ffffffffffffffda RBX: 00007efff33e5fa8 RCX: 00007efff318f749
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007efff33e5fac
RBP: 00007efff33e5fa0 R08: 00000000007459b5 R09: 0000000000000000
R10: 0000000000000009 R11: 0000000000000246 R12: 0000000000000000
R13: 00007efff33e6038 R14: 00007fffc2d087f0 R15: 00007fffc2d088d8