------------[ cut here ]------------
WARNING: CPU: 1 PID: 3623 at net/ipv4/route.c:1274 kfree_skb include/linux/skbuff.h:1220 [inline]
WARNING: CPU: 1 PID: 3623 at net/ipv4/route.c:1274 ip_rt_bug+0x25/0xf0 net/ipv4/route.c:1273
Modules linked in:
CPU: 1 PID: 3623 Comm: udevd Not tainted 6.1.131-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:ip_rt_bug+0x25/0xf0 net/ipv4/route.c:1274
Code: ff ff 0f 1f 00 41 57 41 56 41 55 41 54 53 48 89 d3 e8 2f b1 61 f8 66 90 e8 28 b1 61 f8 48 89 df be 01 00 00 00 e8 cb 06 76 ff <0f> 0b 31 c0 5b 41 5c 41 5d 41 5e 41 5f c3 49 bd 00 00 00 00 00 fc
RSP: 0018:ffffc900001e0638 EFLAGS: 00010296
RAX: 7bff1a08fc9ba901 RBX: ffff888027f6c640 RCX: ffffffff816b249a
RDX: dffffc0000000000 RSI: ffffffff8b0c1d40 RDI: ffffffff8b5f6f80
RBP: dffffc0000000000 R08: dffffc0000000000 R09: fffffbfff225725f
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888027f6c640
R13: ffff888027f6c698 R14: ffff88807373b880 R15: ffff88801eef9380
FS:  00007fa590ba8c80(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f55b2178ab8 CR3: 00000000215ca000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <IRQ>
 dst_output include/net/dst.h:453 [inline]
 ip_local_out net/ipv4/ip_output.c:126 [inline]
 ip_send_skb+0x113/0x1a0 net/ipv4/ip_output.c:1599
 __icmp_send+0x12fd/0x1840 net/ipv4/icmp.c:785
 ipv4_send_dest_unreach net/ipv4/route.c:1254 [inline]
 ipv4_link_failure+0x63d/0xa20 net/ipv4/route.c:1261
 dst_link_failure include/net/dst.h:423 [inline]
 arp_error_report+0x112/0x160 net/ipv4/arp.c:296
 neigh_invalidate+0x240/0x460 net/core/neighbour.c:1059
 neigh_timer_handler+0x8a1/0x1010 net/core/neighbour.c:1146
 call_timer_fn+0x1ad/0x6b0 kernel/time/timer.c:1504
 expire_timers kernel/time/timer.c:1549 [inline]
 __run_timers+0x67c/0x890 kernel/time/timer.c:1820
 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1833
 handle_softirqs+0x2ee/0xa40 kernel/softirq.c:578
 __do_softirq kernel/softirq.c:612 [inline]
 invoke_softirq kernel/softirq.c:452 [inline]
 __irq_exit_rcu+0x157/0x240 kernel/softirq.c:661
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:673
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1118 [inline]
 sysvec_apic_timer_interrupt+0xa0/0xc0 arch/x86/kernel/apic/apic.c:1118
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:691
RIP: 0010:check_kcov_mode kernel/kcov.c:193 [inline]
RIP: 0010:write_comp_data kernel/kcov.c:245 [inline]
RIP: 0010:__sanitizer_cov_trace_switch+0x83/0xe0 kernel/kcov.c:349
Code: 8b 74 d6 10 65 8b 05 c4 c0 77 7e 25 00 01 ff 00 74 11 3d 00 01 00 00 75 de 41 83 bb 1c 16 00 00 00 74 d4 41 8b 83 f8 15 00 00 <83> f8 03 75 c8 49 8b 8b 00 16 00 00 45 8b bb fc 15 00 00 49 c1 e7
RSP: 0018:ffffc900032d76b8 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000005 RCX: 000000000000008b
RDX: 000000000000000a RSI: ffffffff8e89db00 RDI: 0000000000000000
RBP: ffffc900032d77d0 R08: 0000000000000001 R09: ffffffff8aabb580
R10: 0000000000000012 R11: ffff88807d6bd940 R12: 0000000000000000
R13: 0000000000000000 R14: 000000000000000a R15: ffffffff8b58ae40
 vsnprintf+0x190/0x1c70 lib/vsprintf.c:2761
 tomoyo_supervisor+0x123/0x12d0 security/tomoyo/common.c:2060
 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
 tomoyo_path_permission+0x243/0x360 security/tomoyo/file.c:587
 tomoyo_path_perm+0x478/0x710 security/tomoyo/file.c:838
 security_inode_getattr+0xcf/0x120 security/security.c:1361
 vfs_getattr fs/stat.c:158 [inline]
 vfs_statx+0x18b/0x480 fs/stat.c:233
 vfs_fstatat fs/stat.c:267 [inline]
 __do_sys_newfstatat fs/stat.c:437 [inline]
 __se_sys_newfstatat fs/stat.c:431 [inline]
 __x64_sys_newfstatat+0x151/0x1e0 fs/stat.c:431
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fa5907165f4
Code: 64 c7 00 09 00 00 00 83 c8 ff c3 48 89 f2 b9 00 01 00 00 48 89 fe bf 9c ff ff ff e9 00 00 00 00 41 89 ca b8 06 01 00 00 0f 05 <45> 31 c0 3d 00 f0 ff ff 76 10 48 8b 15 03 a8 0d 00 f7 d8 41 83 c8
RSP: 002b:00007ffcce2610e8 EFLAGS: 00000202 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 0000564acef02900 RCX: 00007fa5907165f4
RDX: 00007ffcce261100 RSI: 00007fa5907b3130 RDI: 000000000000000d
RBP: 0000564acef60260 R08: 0000000000090800 R09: 0000564acef1e880
R10: 0000000000001000 R11: 0000000000000202 R12: 00007ffcce261100
R13: 00000000000000ff R14: 0000564acc8891c4 R15: 0000000000000000
 </TASK>
----------------
Code disassembly (best guess):
   0:	8b 74 d6 10          	mov    0x10(%rsi,%rdx,8),%esi
   4:	65 8b 05 c4 c0 77 7e 	mov    %gs:0x7e77c0c4(%rip),%eax        # 0x7e77c0cf
   b:	25 00 01 ff 00       	and    $0xff0100,%eax
  10:	74 11                	je     0x23
  12:	3d 00 01 00 00       	cmp    $0x100,%eax
  17:	75 de                	jne    0xfffffff7
  19:	41 83 bb 1c 16 00 00 	cmpl   $0x0,0x161c(%r11)
  20:	00
  21:	74 d4                	je     0xfffffff7
  23:	41 8b 83 f8 15 00 00 	mov    0x15f8(%r11),%eax
* 2a:	83 f8 03             	cmp    $0x3,%eax <-- trapping instruction
  2d:	75 c8                	jne    0xfffffff7
  2f:	49 8b 8b 00 16 00 00 	mov    0x1600(%r11),%rcx
  36:	45 8b bb fc 15 00 00 	mov    0x15fc(%r11),%r15d
  3d:	49                   	rex.WB
  3e:	c1                   	.byte 0xc1
  3f:	e7                   	.byte 0xe7