------------[ cut here ]------------
debug_locks && !(lock_is_held(&(&n->tbl->lock)->dep_map) != 0)
WARNING: net/core/neighbour.c:154 at neigh_mark_dead+0x2fb/0x340 net/core/neighbour.c:154, CPU#1: syz.7.3436/18646
Modules linked in:
CPU: 1 UID: 0 PID: 18646 Comm: syz.7.3436 Tainted: G             L     Y syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP, [Y]=FORCED_BIND
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:neigh_mark_dead+0x2fb/0x340 net/core/neighbour.c:154
Code: e8 03 42 80 3c 28 00 74 08 48 89 df e8 ee a1 7f f8 4c 89 33 5b 41 5c 41 5d 41 5e 41 5f 5d e9 0c e5 33 02 cc e8 f6 a8 0d f8 90 <0f> 0b 90 e9 8f fd ff ff 48 c7 c1 d0 98 7a 90 80 e1 07 80 c1 03 38
RSP: 0018:ffffc90004a4e580 EFLAGS: 00010283
RAX: ffffffff89bb551a RBX: ffff88807d2cb800 RCX: 0000000000080000
RDX: ffffc900112c1000 RSI: 0000000000002d06 RDI: 0000000000002d07
RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52000949ca8 R12: ffff88807d2cb93c
R13: dffffc0000000000 R14: ffff88807d2cb820 R15: ffff88807d2cb800
FS:  00007f021126e6c0(0000) GS:ffff888124dad000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b34819ff8 CR3: 0000000078da4000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000000c DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 neigh_flush_one+0x27c/0x5a0 net/core/neighbour.c:388
 neigh_flush_dev net/core/neighbour.c:432 [inline]
 __neigh_ifdown+0x1fb/0xc70 net/core/neighbour.c:465
 neigh_ifdown+0x1f/0x30 net/core/neighbour.c:487
 rt6_disable_ip+0x751/0x7e0 net/ipv6/route.c:5058
 addrconf_ifdown+0x155/0x1ad0 net/ipv6/addrconf.c:3892
 addrconf_notify+0x1bc/0x1050 net/ipv6/addrconf.c:-1
 notifier_call_chain+0x1a5/0x3d0 kernel/notifier.c:86
 call_netdevice_notifiers_extack net/core/dev.c:2313 [inline]
 call_netdevice_notifiers net/core/dev.c:2327 [inline]
 __dev_notify_flags+0x2d9/0x510 net/core/dev.c:9866
 netif_change_flags+0xde/0x1b0 net/core/dev.c:9893
 do_setlink+0xdd6/0x47a0 net/core/rtnetlink.c:3284
 rtnl_group_changelink net/core/rtnetlink.c:3946 [inline]
 __rtnl_newlink net/core/rtnetlink.c:4112 [inline]
 rtnl_newlink+0x147c/0x1c30 net/core/rtnetlink.c:4242
 rtnetlink_rcv_msg+0x802/0xc00 net/core/rtnetlink.c:7159
 netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2572
 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline]
 netlink_unicast+0x7bd/0x940 net/netlink/af_netlink.c:1361
 netlink_sendmsg+0x7c3/0xae0 net/netlink/af_netlink.c:1916
 sock_sendmsg_nosec+0x13a/0x180 net/socket.c:800
 __sock_sendmsg net/socket.c:815 [inline]
 ____sys_sendmsg+0x54e/0x850 net/socket.c:2712
 ___sys_sendmsg+0x2a5/0x360 net/socket.c:2766
 __sys_sendmsg net/socket.c:2798 [inline]
 __do_sys_sendmsg net/socket.c:2803 [inline]
 __se_sys_sendmsg net/socket.c:2801 [inline]
 __x64_sys_sendmsg+0x1b1/0x290 net/socket.c:2801
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f021039e159
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:00007f021126e028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f0210625fa0 RCX: 00007f021039e159
RDX: 0000000000000000 RSI: 0000200000000140 RDI: 0000000000000005
RBP: 00007f021043506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0210626038 R14: 00007f0210625fa0 R15: 00007ffe7c1494e8
 </TASK>