general protection fault, probably for non-canonical address 0xdffffc000000005a: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000002d0-0x00000000000002d7]
CPU: 1 PID: 8127 Comm: kworker/u4:271 Not tainted 6.1.145-syzkaller-00002-gc750dc582629 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025
Workqueue: netns cleanup_net
RIP: 0010:ip_ignore_linkdown include/linux/inetdevice.h:259 [inline]
RIP: 0010:fib_lookup_good_nhc net/ipv4/fib_trie.c:1413 [inline]
RIP: 0010:nexthop_get_nhc_lookup+0x17e/0x750 include/net/nexthop.h:405
Code: d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 78 15 7c fd 48 89 5d a8 48 8b 1b b8 d0 02 00 00 48 01 c3 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 53 15 7c fd 48 8b 1b 48 85 db 0f
RSP: 0018:ffffc9000b62f030 EFLAGS: 00010206
RAX: 000000000000005a RBX: 00000000000002d0 RCX: 0000000000000000
RDX: ffff888115fd1440 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000b62f0a0 R08: dffffc0000000000 R09: ffffc9000b62f240
R10: fffff520016c5e4e R11: 1ffff920016c5e48 R12: ffff888133308000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffc9000b62f1e0
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2e6697 CR3: 00000001278a8000 CR4: 00000000003506a0
Call Trace:
 <TASK>
 fib_table_lookup+0x10b7/0x1a60 net/ipv4/fib_trie.c:1590
 __inet_dev_addr_type net/ipv4/fib_frontend.c:225 [inline]
 inet_addr_type_dev_table+0x1c3/0x3c0 net/ipv4/fib_frontend.c:267
 fib_del_ifaddr+0x1640/0x1b90 net/ipv4/fib_frontend.c:1334
 fib_inetaddr_event+0xc9/0x310 net/ipv4/fib_frontend.c:1462
 notifier_call_chain kernel/notifier.c:87 [inline]
 blocking_notifier_call_chain+0xcb/0x150 kernel/notifier.c:382
 __inet_del_ifa+0x81f/0xd90 net/ipv4/devinet.c:446
 inet_del_ifa net/ipv4/devinet.c:483 [inline]
 inetdev_destroy net/ipv4/devinet.c:323 [inline]
 inetdev_event+0x6c5/0x10e0 net/ipv4/devinet.c:1616
 notifier_call_chain kernel/notifier.c:87 [inline]
 raw_notifier_call_chain+0xa1/0x110 kernel/notifier.c:455
 call_netdevice_notifiers_info net/core/dev.c:2009 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2047 [inline]
 call_netdevice_notifiers net/core/dev.c:2061 [inline]
 unregister_netdevice_many+0xf8f/0x1820 net/core/dev.c:10955
 default_device_exit_batch+0x9b9/0xa50 net/core/dev.c:11468
 ops_exit_list net/core/net_namespace.c:177 [inline]
 cleanup_net+0x62d/0xb00 net/core/net_namespace.c:604
 process_one_work+0x71f/0xc40 kernel/workqueue.c:2302
 worker_thread+0xa29/0x11f0 kernel/workqueue.c:2449
 kthread+0x281/0x320 kernel/kthread.c:397
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ip_ignore_linkdown include/linux/inetdevice.h:259 [inline]
RIP: 0010:fib_lookup_good_nhc net/ipv4/fib_trie.c:1413 [inline]
RIP: 0010:nexthop_get_nhc_lookup+0x17e/0x750 include/net/nexthop.h:405
Code: d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 78 15 7c fd 48 89 5d a8 48 8b 1b b8 d0 02 00 00 48 01 c3 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 53 15 7c fd 48 8b 1b 48 85 db 0f
RSP: 0018:ffffc9000b62f030 EFLAGS: 00010206
RAX: 000000000000005a RBX: 00000000000002d0 RCX: 0000000000000000
RDX: ffff888115fd1440 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000b62f0a0 R08: dffffc0000000000 R09: ffffc9000b62f240
R10: fffff520016c5e4e R11: 1ffff920016c5e48 R12: ffff888133308000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffc9000b62f1e0
FS:  0000000000000000(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c2e6697 CR3: 0000000116931000 CR4: 00000000003506a0
----------------
Code disassembly (best guess):
   0:	d8 48 c1             	fmuls  -0x3f(%rax)
   3:	e8 03 42 80 3c       	call   0x3c80420b
   8:	28 00                	sub    %al,(%rax)
   a:	74 08                	je     0x14
   c:	48 89 df             	mov    %rbx,%rdi
   f:	e8 78 15 7c fd       	call   0xfd7c158c
  14:	48 89 5d a8          	mov    %rbx,-0x58(%rbp)
  18:	48 8b 1b             	mov    (%rbx),%rbx
  1b:	b8 d0 02 00 00       	mov    $0x2d0,%eax
  20:	48 01 c3             	add    %rax,%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	48 89 df             	mov    %rbx,%rdi
  34:	e8 53 15 7c fd       	call   0xfd7c158c
  39:	48 8b 1b             	mov    (%rbx),%rbx
  3c:	48 85 db             	test   %rbx,%rbx
  3f:	0f                   	.byte 0xf