------------[ cut here ]------------ refcount_t: decrement hit 0; leaking memory. WARNING: CPU: 0 PID: 23075 at lib/refcount.c:31 refcount_warn_saturate+0xbf/0x1e0 lib/refcount.c:31 Modules linked in: CPU: 1 PID: 23075 Comm: syz-executor.4 Not tainted 5.16.0-rc1-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 be 63 a2 09 31 ff 89 de e8 0d ed 9c fd 84 db 75 e0 e8 24 e9 9c fd 48 c7 c7 20 de 04 8a c6 05 9e 63 a2 09 01 e8 9b e1 33 05 <0f> 0b eb c4 e8 08 e9 9c fd 0f b6 1d 8d 63 a2 09 31 ff 89 de e8 d8 RSP: 0018:ffffc90005b7f610 EFLAGS: 00010286 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000040000 RSI: ffffffff815f0ad8 RDI: fffff52000b6feb4 RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 R10: ffffffff815ea87e R11: 0000000000000000 R12: ffff888033c7e5b0 R13: 0000000000000001 R14: fffffbfff1701e30 R15: dffffc0000000000 FS: 00007f9fd4041700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f4f68bc2000 CR3: 000000002e541000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __refcount_dec include/linux/refcount.h:344 [inline] refcount_dec include/linux/refcount.h:359 [inline] dev_put include/linux/netdevice.h:3821 [inline] vlan_dev_free+0xdc/0x100 net/8021q/vlan_dev.c:848 netdev_run_todo+0x6b4/0xa80 net/core/dev.c:9964 rtnl_unlock net/core/rtnetlink.c:112 [inline] rtnetlink_rcv_msg+0x420/0xb80 net/core/rtnetlink.c:5572 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: 0033:0x7f9fd6acbae9 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:00007f9fd4041188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f9fd6bdef60 RCX: 00007f9fd6acbae9 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000007 RBP: 00007f9fd6b25f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc4744f41f R14: 00007f9fd4041300 R15: 0000000000022000