CFI failure at __traceiter_neigh_update+0x9d/0xf0 include/trace/events/neigh.h:72 (target: 0xffffc900001b04d0; expected type: 0xcdd4cfdd)
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 547 Comm: kworker/u4:6 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:__traceiter_neigh_update+0x9d/0xf0 include/trace/events/neigh.h:72
Code: 05 e8 87 41 b9 fd 49 8b 7e 08 48 8b 75 c8 48 8b 55 c0 44 89 e9 44 8b 45 d4 44 8b 4d d0 41 ba 23 30 2b 32 45 03 54 24 fc 74 02 <0f> 0b 41 ff d4 48 83 c3 18 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74
RSP: 0018:ffffc900001b04d0 EFLAGS: 00010282
RAX: 1ffff11021d9b1a9 RBX: ffff88810ecd8d40 RCX: 0000000000000004
RDX: ffff88810c382456 RSI: ffff888100a5e800 RDI: ffffc9000386b000
RBP: ffffc900001b0510 R08: 0000000000000001 R09: 0000000000000000
R10: 00000000d76b972f R11: 0000000000000100 R12: ffffffff817125b0
R13: 0000000000000004 R14: ffff88810ecd8d40 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c006c77000 CR3: 0000000006e0f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_neigh_update include/trace/events/neigh.h:72 [inline]
__neigh_update+0x1f4b/0x2080 net/core/neighbour.c:1307
neigh_update net/core/neighbour.c:1488 [inline]
neigh_event_ns+0xb3/0x120 net/core/neighbour.c:1517
arp_process+0x119c/0x1920 net/ipv4/arp.c:851
NF_HOOK+0x14d/0x1a0 include/linux/netfilter.h:305
arp_rcv+0x2ef/0x480 net/ipv4/arp.c:990
__netif_receive_skb_list_ptype net/core/dev.c:5633 [inline]
__netif_receive_skb_list_core+0x713/0x770 net/core/dev.c:5676
__netif_receive_skb_list net/core/dev.c:5728 [inline]
netif_receive_skb_list_internal+0x7d2/0xa60 net/core/dev.c:5819
gro_normal_list include/net/gro.h:433 [inline]
napi_complete_done+0x36f/0x790 net/core/dev.c:6160
virtqueue_napi_complete drivers/net/virtio_net.c:403 [inline]
virtnet_poll+0x991/0x1150 drivers/net/virtio_net.c:1717
__napi_poll+0xd0/0x5e0 net/core/dev.c:6594
napi_poll net/core/dev.c:6661 [inline]
net_rx_action+0x49b/0xaa0 net/core/dev.c:6775
handle_softirqs+0x1d7/0x600 kernel/softirq.c:642
__do_softirq kernel/softirq.c:680 [inline]
invoke_softirq kernel/softirq.c:497 [inline]
__irq_exit_rcu+0x52/0xf0 kernel/softirq.c:729
irq_exit_rcu+0x9/0x10 kernel/softirq.c:741
common_interrupt+0xbe/0xe0 arch/x86/kernel/irq.c:242
asm_common_interrupt+0x27/0x40 arch/x86/include/asm/idtentry.h:682
RIP: 0010:csd_lock_wait kernel/smp.c:453 [inline]
RIP: 0010:smp_call_function_many_cond+0x872/0x960 kernel/smp.c:998
Code: 41 8b 1f 89 de 83 e6 01 31 ff e8 29 66 09 00 83 e3 01 48 bb 00 00 00 00 00 fc ff df 75 0a e8 f5 61 09 00 e9 38 ff ff ff f3 90 <41> 0f b6 44 1d 00 84 c0 75 14 41 f7 07 01 00 00 00 0f 84 1a ff ff
RSP: 0018:ffffc90003007840 EFLAGS: 00000293
RAX: ffffffff8166a78e RBX: dffffc0000000000 RCX: ffff88811fb6e540
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90003007978 R08: dffffc0000000000 R09: ffffed103ee2721b
R10: 0000000000000000 R11: ffffffff81342170 R12: 1ffff1103ee27218
R13: 1ffff1103ee07ae1 R14: 0000000000000000 R15: ffff8881f703d708
on_each_cpu_cond_mask+0x43/0x80 kernel/smp.c:1166
on_each_cpu include/linux/smp.h:71 [inline]
text_poke_sync arch/x86/kernel/alternative.c:1574 [inline]
text_poke_bp_batch+0x1cc/0x580 arch/x86/kernel/alternative.c:1774
text_poke_flush arch/x86/kernel/alternative.c:1965 [inline]
text_poke_finish+0x1a/0x30 arch/x86/kernel/alternative.c:1972
arch_jump_label_transform_apply+0x15/0x30 arch/x86/kernel/jump_label.c:146
__jump_label_update+0x37c/0x3a0 kernel/jump_label.c:451
jump_label_update+0x39b/0x450 kernel/jump_label.c:797
static_key_enable_cpuslocked+0x126/0x240 kernel/jump_label.c:173
static_key_enable+0x1a/0x30 kernel/jump_label.c:186
toggle_allocation_gate+0xb4/0x400 mm/kfence/core.c:805
process_one_work+0x71f/0xc40 kernel/workqueue.c:2302
worker_thread+0xa29/0x11f0 kernel/workqueue.c:2449
kthread+0x281/0x320 kernel/kthread.c:386
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__traceiter_neigh_update+0x9d/0xf0 include/trace/events/neigh.h:72
Code: 05 e8 87 41 b9 fd 49 8b 7e 08 48 8b 75 c8 48 8b 55 c0 44 89 e9 44 8b 45 d4 44 8b 4d d0 41 ba 23 30 2b 32 45 03 54 24 fc 74 02 <0f> 0b 41 ff d4 48 83 c3 18 48 89 d8 48 c1 e8 03 42 80 3c 38 00 74
RSP: 0018:ffffc900001b04d0 EFLAGS: 00010282
RAX: 1ffff11021d9b1a9 RBX: ffff88810ecd8d40 RCX: 0000000000000004
RDX: ffff88810c382456 RSI: ffff888100a5e800 RDI: ffffc9000386b000
RBP: ffffc900001b0510 R08: 0000000000000001 R09: 0000000000000000
R10: 00000000d76b972f R11: 0000000000000100 R12: ffffffff817125b0
R13: 0000000000000004 R14: ffff88810ecd8d40 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c006c77000 CR3: 0000000006e0f000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 41 8b 1f mov (%r15),%ebx
3: 89 de mov %ebx,%esi
5: 83 e6 01 and $0x1,%esi
8: 31 ff xor %edi,%edi
a: e8 29 66 09 00 call 0x96638
f: 83 e3 01 and $0x1,%ebx
12: 48 bb 00 00 00 00 00 movabs $0xdffffc0000000000,%rbx
19: fc ff df
1c: 75 0a jne 0x28
1e: e8 f5 61 09 00 call 0x96218
23: e9 38 ff ff ff jmp 0xffffff60
28: f3 90 pause
* 2a: 41 0f b6 44 1d 00 movzbl 0x0(%r13,%rbx,1),%eax <-- trapping instruction
30: 84 c0 test %al,%al
32: 75 14 jne 0x48
34: 41 f7 07 01 00 00 00 testl $0x1,(%r15)
3b: 0f .byte 0xf
3c: 84 1a test %bl,(%rdx)
3e: ff (bad)
3f: ff .byte 0xff