refcount_t: decrement hit 0; leaking memory.
WARNING: CPU: 0 PID: 22687 at lib/refcount.c:31 refcount_warn_saturate+0xbf/0x1e0 lib/refcount.c:31
Modules linked in:
CPU: 1 PID: 22687 Comm: syz-executor.4 Not tainted 5.16.0-rc2-next-20211125-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:refcount_warn_saturate+0xbf/0x1e0 lib/refcount.c:31
Code: 1d dc ee 99 09 31 ff 89 de e8 4d 1b 95 fd 84 db 75 e0 e8 64 17 95 fd 48 c7 c7 60 7e 04 8a c6 05 bc ee 99 09 01 e8 17 03 28 05 <0f> 0b eb c4 e8 48 17 95 fd 0f b6 1d ab ee 99 09 31 ff 89 de e8 18
RSP: 0018:ffffc90002d4efe0 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000040000 RSI: ffffffff815f3208 RDI: fffff520005a9dee
RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff815ecfae R11: 0000000000000000 R12: ffff888073bae5b0
R13: 00000000fffffff0 R14: 00000000ffffffff R15: ffff88803dec3480
FS:  00007f743cb5a700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb55eafd130 CR3: 00000000b4556000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 __refcount_dec include/linux/refcount.h:344 [inline]
 refcount_dec include/linux/refcount.h:359 [inline]
 dev_put include/linux/netdevice.h:3815 [inline]
 vlan_dev_free+0xdc/0x100 net/8021q/vlan_dev.c:848
 register_netdevice+0xb1c/0x1500 net/core/dev.c:9706
 register_vlan_dev+0x360/0x960 net/8021q/vlan.c:179
 vlan_newlink+0x447/0x6d0 net/8021q/vlan_netlink.c:187
 __rtnl_newlink+0x106d/0x1750 net/core/rtnetlink.c:3457
 rtnl_newlink+0x64/0xa0 net/core/rtnetlink.c:3505
 rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5570
 netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2487
 netlink_unicast_kernel net/netlink/af_netlink.c:1315 [inline]
 netlink_unicast+0x533/0x7d0 net/netlink/af_netlink.c:1341
 netlink_sendmsg+0x86d/0xda0 net/netlink/af_netlink.c:1912
 sock_sendmsg_nosec net/socket.c:704 [inline]
 sock_sendmsg+0xcf/0x120 net/socket.c:724
 ____sys_sendmsg+0x6e8/0x810 net/socket.c:2409
 ___sys_sendmsg+0xf3/0x170 net/socket.c:2463
 __sys_sendmsg+0xe5/0x1b0 net/socket.c:2492
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f743f5e4ae9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f743cb5a188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f743f6f7f60 RCX: 00007f743f5e4ae9
RDX: 0000000000000080 RSI: 0000000020000140 RDI: 0000000000000005
RBP: 00007f743f63ef6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd6a8dc67f R14: 00007f743cb5a300 R15: 0000000000022000
 </TASK>