rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 1-....: (1 GPs behind) idle=2d2c/1/0x4000000000000000 softirq=38693/38694 fqs=5110
rcu: hardirqs softirqs csw/system
rcu: number: 1341494 0 0
rcu: cputime: 16281 36208 43 ==> 52500(ms)
rcu: (t=10501 jiffies g=41633 q=879 ncpus=2)
CPU: 1 PID: 12171 Comm: syz.0.1879 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:orc_ip arch/x86/kernel/unwind_orc.c:80 [inline]
RIP: 0010:__orc_find arch/x86/kernel/unwind_orc.c:102 [inline]
RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:227 [inline]
RIP: 0010:unwind_next_frame+0x498/0x2970 arch/x86/kernel/unwind_orc.c:494
Code: ba 00 00 00 00 00 fc ff df 4c 8b 74 24 48 48 89 d8 4c 29 e0 48 89 c1 48 c1 f9 02 48 c1 e8 3f 48 01 c8 48 83 e0 fe 4d 8d 3c 44 <4c> 89 f8 48 c1 e8 03 0f b6 04 10 84 c0 75 3e 4d 63 2f 4d 01 fd 4c
RSP: 0018:ffffc900001eef38 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffffff8ea3517c RCX: 0000000000000000
RDX: dffffc0000000000 RSI: ffffffff81df401d RDI: ffffffff81df403d
RBP: ffffffff8ea3517c R08: ffffc900001ef0d0 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000100 R12: ffffffff8ea3517c
R13: ffffffff81df403d R14: ffffffff81df401d R15: ffffffff8ea3517c
FS: 00007f1e13d3a6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000005d562000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000200000000300 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
arch_stack_walk+0x144/0x190 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0xaa/0x100 kernel/stacktrace.c:122
kasan_save_stack mm/kasan/common.c:46 [inline]
kasan_set_track+0x4e/0x70 mm/kasan/common.c:53
kasan_save_free_info+0x2e/0x50 mm/kasan/generic.c:522
____kasan_slab_free+0x126/0x1e0 mm/kasan/common.c:237
kasan_slab_free include/linux/kasan.h:164 [inline]
slab_free_hook mm/slub.c:1811 [inline]
slab_free_freelist_hook+0x130/0x1a0 mm/slub.c:1837
slab_free mm/slub.c:3830 [inline]
kmem_cache_free+0xf8/0x270 mm/slub.c:3852
packet_rcv+0x16b/0x13d0 net/packet/af_packet.c:2278
dev_queue_xmit_nit+0xb16/0xbb0 net/core/dev.c:2385
xmit_one net/core/dev.c:3640 [inline]
dev_hard_start_xmit+0x148/0x740 net/core/dev.c:3660
sch_direct_xmit+0x25e/0x4c0 net/sched/sch_generic.c:345
__dev_xmit_skb net/core/dev.c:3881 [inline]
__dev_queue_xmit+0x165d/0x3660 net/core/dev.c:4416
neigh_output include/net/neighbour.h:543 [inline]
ip_finish_output2+0xd3a/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+0x1d6d/0x33f0 net/ipv4/tcp_output.c:1427
tcp_validate_incoming+0xf13/0x2250 net/ipv4/tcp_input.c:5901
tcp_rcv_established+0x7de/0x1d20 net/ipv4/tcp_input.c:6166
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:5689 [inline]
__netif_receive_skb_list_core+0x2da/0x750 net/core/dev.c:5727
__netif_receive_skb_list net/core/dev.c:5789 [inline]
netif_receive_skb_list_internal+0x943/0xca0 net/core/dev.c:5880
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:580 [inline]
napi_gro_receive+0x565/0xb00 net/core/gro.c:610
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:6650
napi_poll net/core/dev.c:6717 [inline]
net_rx_action+0x616/0xc40 net/core/dev.c:6853
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 ea cb f6 e8 4c fd fc 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:ffffc9000d32fa60 EFLAGS: 00000286
RAX: 8f38f53abdbaae00 RBX: ffff888080685a00 RCX: 8f38f53abdbaae00
RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: 0000000000000001
RBP: ffffc9000d32fb00 R08: ffffffff8e8b666f R09: 1ffffffff1d16ccd
R10: dffffc0000000000 R11: fffffbfff1d16cce R12: 0000000000000000
R13: 0000000000000000 R14: dffffc0000000000 R15: 1ffff92001a65f4c
irqentry_exit+0x67/0x70 kernel/entry/common.c:438
asm_sysvec_reschedule_ipi+0x1a/0x20 arch/x86/include/asm/idtentry.h:692
RIP: 0010:task_work_run+0xcc/0x260 kernel/task_work.c:225
Code: e9 03 48 89 4c 24 10 eb 05 e8 60 a1 2d 00 48 8b 44 24 18 42 80 3c 20 00 74 08 4c 89 ff e8 6c e1 85 00 4d 8b 2f 4c 89 6c 24 40 <4d> 85 ed 74 0a e8 3a a1 2d 00 45 31 ed eb 35 48 8b 44 24 10 42 0f
RSP: 0018:ffffc9000d32fbc0 EFLAGS: 00000246
RAX: 1ffff110100d0c6d RBX: 1ffff92001a65f7c RCX: 1ffff110100d0b45
RDX: ffffc9000d78b000 RSI: 000000000002ef5b RDI: 000000000002ef5c
RBP: ffffc9000d32fc78 R08: ffff888080685a07 R09: 1ffff110100d0b40
R10: dffffc0000000000 R11: ffffed10100d0b41 R12: dffffc0000000000
R13: ffff888080686f80 R14: ffff888080686400 R15: ffff888080686368
get_signal+0x1235/0x13f0 kernel/signal.c:2678
arch_do_signal_or_restart+0xc2/0x800 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1e12d9ce59
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:00007f1e13d3a0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f1e13015fa8 RCX: 00007f1e12d9ce59
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f1e13015fac
RBP: 00007f1e13015fa0 R08: 0000000000745a77 R09: 0000000000000000
R10: 000000000000000a R11: 0000000000000246 R12: 0000000000000000
R13: 00007f1e13016038 R14: 00007ffd823a5da0 R15: 00007ffd823a5e88