rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 0-....: (2698 ticks this GP) idle=d694/1/0x4000000000000000 softirq=13770/13770 fqs=4054
rcu: hardirqs softirqs csw/system
rcu: number: 609716 1 0
rcu: cputime: 10204 16765 23 ==> 27000(ms)
rcu: (t=10503 jiffies g=14889 q=4123 ncpus=2)
CPU: 0 PID: 6505 Comm: syz.2.170 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:preempt_count arch/x86/include/asm/preempt.h:27 [inline]
RIP: 0010:check_kcov_mode kernel/kcov.c:178 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x10/0x60 kernel/kcov.c:212
Code: 89 fb e8 13 00 00 00 48 8b 3d 7c 0d 05 0d 48 89 de 5b e9 c3 b0 57 00 cc cc cc f3 0f 1e fa 48 8b 04 24 65 48 8b 0d 80 35 7c 7e <65> 8b 15 81 35 7c 7e 81 e2 00 01 ff 00 74 11 81 fa 00 01 00 00 75
RSP: 0018:ffffc90000006020 EFLAGS: 00000296
RAX: ffffffff813be049 RBX: ffffffff8f147d13 RCX: ffff88802c793c00
RDX: ffffc90000006188 RSI: ffffc900038cfbd0 RDI: ffffc90000006148
RBP: dffffc0000000000 R08: ffff88802c793c00 R09: 0000000000000003
R10: 0000000000000004 R11: 0000000000000100 R12: ffffc900038cfae0
R13: ffffc90000006148 R14: ffffffff8f147d12 R15: ffffc90000006148
FS: 00007fc5775486c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000100000000 CR3: 000000002ddaf000 CR4: 00000000003506f0
DR0: 0000000000000008 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
deref_stack_reg+0x29/0x230 arch/x86/kernel/unwind_orc.c:402
unwind_next_frame+0x1781/0x2990 arch/x86/kernel/unwind_orc.c:648
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+0x28/0x40 mm/kasan/generic.c:522
____kasan_slab_free+0x126/0x1f0 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+0xf8/0x290 mm/slub.c:3852
packet_rcv+0x172/0x1360 net/packet/af_packet.c:2295
dev_queue_xmit_nit+0xb0c/0xba0 net/core/dev.c:2390
xmit_one net/core/dev.c:3645 [inline]
dev_hard_start_xmit+0x150/0x790 net/core/dev.c:3665
sch_direct_xmit+0x251/0x4a0 net/sched/sch_generic.c:345
__dev_xmit_skb net/core/dev.c:3886 [inline]
__dev_queue_xmit+0x18b8/0x37e0 net/core/dev.c:4440
dev_queue_xmit include/linux/netdevice.h:3157 [inline]
neigh_hh_output include/net/neighbour.h:531 [inline]
neigh_output include/net/neighbour.h:545 [inline]
ip_finish_output2+0xd4f/0x1260 net/ipv4/ip_output.c:235
NF_HOOK_COND include/linux/netfilter.h:293 [inline]
ip_output+0x2a5/0x3a0 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+0x1056/0x1960 net/ipv4/ip_output.c:540
__tcp_transmit_skb+0x1dd6/0x3470 net/ipv4/tcp_output.c:1427
tcp_ack_snd_check net/ipv4/tcp_input.c:5768 [inline]
tcp_rcv_established+0xb22/0x1d70 net/ipv4/tcp_input.c:6214
tcp_v4_do_rcv+0x6d3/0xba0 net/ipv4/tcp_ipv4.c:1737
tcp_v4_rcv+0x2358/0x2a60 net/ipv4/tcp_ipv4.c:2169
ip_protocol_deliver_rcu+0x20a/0x3f0 net/ipv4/ip_input.c:205
ip_local_deliver_finish+0x2c3/0x510 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+0xa36/0xd60 net/ipv4/ip_input.c:639
ip_list_rcv+0x3ed/0x440 net/ipv4/ip_input.c:674
__netif_receive_skb_list_ptype net/core/dev.c:5713 [inline]
__netif_receive_skb_list_core+0x2d9/0x770 net/core/dev.c:5751
__netif_receive_skb_list net/core/dev.c:5813 [inline]
netif_receive_skb_list_internal+0x943/0xca0 net/core/dev.c:5904
gro_normal_list include/net/gro.h:452 [inline]
gro_normal_one include/net/gro.h:465 [inline]
napi_skb_finish net/core/gro.c:614 [inline]
napi_gro_receive+0x553/0xaf0 net/core/gro.c:644
receive_buf+0x20ab/0x3660 drivers/net/virtio_net.c:1874
virtnet_receive drivers/net/virtio_net.c:2159 [inline]
virtnet_poll+0x69e/0x1300 drivers/net/virtio_net.c:2236
__napi_poll+0xbb/0x460 net/core/dev.c:6674
napi_poll net/core/dev.c:6741 [inline]
net_rx_action+0x65f/0xcc0 net/core/dev.c:6877
handle_softirqs+0x27d/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:generic_exec_single+0x477/0x4e0 kernel/smp.c:418
Code: 75 11 e8 0c 10 0b 00 48 85 db 75 16 e8 02 10 0b 00 eb 15 e8 fb 0f 0b 00 e8 06 58 13 09 48 85 db 74 ea e8 ec 0f 0b 00 fb 31 c0 <48> c7 44 24 20 0e 36 e0 45 4b c7 04 2c 00 00 00 00 43 c7 44 2c 08
RSP: 0018:ffffc900038cfa00 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000200 RCX: 0000000000080000
RDX: ffffc9000ce4a000 RSI: 00000000000032b6 RDI: 00000000000032b7
RBP: ffffc900038cfad0 R08: ffffffff911ef607 R09: 1ffffffff223dec0
R10: dffffc0000000000 R11: fffffbfff223dec1 R12: 1ffff92000719f44
R13: dffffc0000000000 R14: 0000000000000000 R15: 1ffff92000719f65
smp_call_function_single+0x36d/0x5a0 kernel/smp.c:647
task_function_call kernel/events/core.c:120 [inline]
perf_install_in_context+0x5bb/0x920 kernel/events/core.c:2958
__do_sys_perf_event_open kernel/events/core.c:12967 [inline]
__se_sys_perf_event_open+0x1818/0x1d40 kernel/events/core.c:12609
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc57659e159
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:00007fc577548028 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007fc576825fa0 RCX: 00007fc57659e159
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000200000000480
RBP: 00007fc576635024 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc576826038 R14: 00007fc576825fa0 R15: 00007ffe10375f28