device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
device veth1_macvtap left promiscuous mode
device veth0_vlan left promiscuous mode
general protection fault, probably for non-canonical address 0xdffffc000000005b: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000002d8-0x00000000000002df]
CPU: 0 PID: 48 Comm: kworker/u4:2 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2025
Workqueue: netns cleanup_net
RIP: 0010:ip_ignore_linkdown include/linux/inetdevice.h:254 [inline]
RIP: 0010:fib_lookup_good_nhc net/ipv4/fib_trie.c:1363 [inline]
RIP: 0010:nexthop_get_nhc_lookup+0x1a2/0x6c0 include/net/nexthop.h:291
Code: 74 08 48 89 df e8 de 6e bf fd 48 89 5d a8 48 8b 1b b8 d8 02 00 00 48 01 c3 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 b0 6e bf fd 48 8b 1b 48 85 db 74 68
RSP: 0018:ffffc900009d7060 EFLAGS: 00010202
RAX: 000000000000005b RBX: 00000000000002d8 RCX: dffffc0000000000
RDX: ffff8881041d2780 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900009d70d0 R08: dffffc0000000000 R09: ffffc900009d7260
R10: fffff5200013ae52 R11: 1ffff9200013ae4c R12: ffff88810ec05100
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88810ec0fb10
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000100 CR3: 00000001294be000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 fib_table_lookup+0xe4c/0x1730 net/ipv4/fib_trie.c:1542
 __inet_dev_addr_type net/ipv4/fib_frontend.c:224 [inline]
 inet_addr_type_dev_table+0x1c9/0x3d0 net/ipv4/fib_frontend.c:266
 fib_del_ifaddr+0x1640/0x1b90 net/ipv4/fib_frontend.c:1325
 fib_inetaddr_event+0xc9/0x310 net/ipv4/fib_frontend.c:1453
 notifier_call_chain kernel/notifier.c:83 [inline]
 blocking_notifier_call_chain+0xba/0x140 kernel/notifier.c:337
 __inet_del_ifa+0x81f/0xd90 net/ipv4/devinet.c:442
 inet_del_ifa net/ipv4/devinet.c:479 [inline]
 inetdev_destroy net/ipv4/devinet.c:320 [inline]
 inetdev_event+0x65a/0x1030 net/ipv4/devinet.c:1612
 notifier_call_chain kernel/notifier.c:83 [inline]
 raw_notifier_call_chain+0x90/0x100 kernel/notifier.c:410
 call_netdevice_notifiers_info net/core/dev.c:2054 [inline]
 call_netdevice_notifiers_extack net/core/dev.c:2066 [inline]
 call_netdevice_notifiers net/core/dev.c:2080 [inline]
 unregister_netdevice_many+0xf8b/0x1980 net/core/dev.c:10767
 default_device_exit_batch+0x330/0x390 net/core/dev.c:11287
 ops_exit_list net/core/net_namespace.c:190 [inline]
 cleanup_net+0x5fb/0xb70 net/core/net_namespace.c:609
 process_one_work+0x6e1/0xba0 kernel/workqueue.c:2301
 worker_thread+0xa6a/0x13b0 kernel/workqueue.c:2447
 kthread+0x346/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Modules linked in:
---[ end trace 4f789611cc82644c ]---
RIP: 0010:ip_ignore_linkdown include/linux/inetdevice.h:254 [inline]
RIP: 0010:fib_lookup_good_nhc net/ipv4/fib_trie.c:1363 [inline]
RIP: 0010:nexthop_get_nhc_lookup+0x1a2/0x6c0 include/net/nexthop.h:291
Code: 74 08 48 89 df e8 de 6e bf fd 48 89 5d a8 48 8b 1b b8 d8 02 00 00 48 01 c3 48 89 d8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <80> 3c 08 00 74 08 48 89 df e8 b0 6e bf fd 48 8b 1b 48 85 db 74 68
RSP: 0018:ffffc900009d7060 EFLAGS: 00010202
RAX: 000000000000005b RBX: 00000000000002d8 RCX: dffffc0000000000
RDX: ffff8881041d2780 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900009d70d0 R08: dffffc0000000000 R09: ffffc900009d7260
R10: fffff5200013ae52 R11: 1ffff9200013ae4c R12: ffff88810ec05100
R13: 0000000000000000 R14: 0000000000000000 R15: ffff88810ec0fb10
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000000100 CR3: 000000010d01f000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	74 08                	je     0xa
   2:	48 89 df             	mov    %rbx,%rdi
   5:	e8 de 6e bf fd       	call   0xfdbf6ee8
   a:	48 89 5d a8          	mov    %rbx,-0x58(%rbp)
   e:	48 8b 1b             	mov    (%rbx),%rbx
  11:	b8 d8 02 00 00       	mov    $0x2d8,%eax
  16:	48 01 c3             	add    %rax,%rbx
  19:	48 89 d8             	mov    %rbx,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  27:	fc ff df
* 2a:	80 3c 08 00          	cmpb   $0x0,(%rax,%rcx,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	48 89 df             	mov    %rbx,%rdi
  33:	e8 b0 6e bf fd       	call   0xfdbf6ee8
  38:	48 8b 1b             	mov    (%rbx),%rbx
  3b:	48 85 db             	test   %rbx,%rbx
  3e:	74 68                	je     0xa8