------------[ cut here ]------------ refcount_t: decrement hit 0; leaking memory. WARNING: CPU: 0 PID: 19526 at lib/refcount.c:31 refcount_warn_saturate+0x17c/0x1a0 lib/refcount.c:31 Modules linked in: CPU: 0 PID: 19526 Comm: syz-executor.1 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+0x17c/0x1a0 lib/refcount.c:31 Code: f4 8a 31 c0 e8 d5 46 38 fd 0f 0b e9 64 ff ff ff e8 29 6b 6e fd c6 05 a6 40 f5 09 01 48 c7 c7 80 fe f4 8a 31 c0 e8 b4 46 38 fd <0f> 0b e9 43 ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c a2 fe ff RSP: 0018:ffffc90010eef348 EFLAGS: 00010246 RAX: da543a1aec104d00 RBX: 0000000000000004 RCX: 0000000000040000 RDX: ffffc9000cf85000 RSI: 00000000000180d8 RDI: 00000000000180d9 RBP: 0000000000000004 R08: ffffffff8169fb82 R09: ffffed10173467b1 R10: ffffed10173467b1 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff888091e2a5c8 R14: 1ffff110123c54b9 R15: 0000000000000002 FS: 00007f289a436700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c1aee5f478 CR3: 00000001739e3000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: netdev_wait_allrefs net/core/dev.c:10498 [inline] netdev_run_todo+0x582/0xcf0 net/core/dev.c:10615 rtnl_unlock net/core/rtnetlink.c:112 [inline] rtnetlink_rcv_msg+0x93b/0xe60 net/core/rtnetlink.c:5572 netlink_rcv_skb+0x200/0x470 net/netlink/af_netlink.c:2491 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x814/0x9f0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0xa20/0xe40 net/netlink/af_netlink.c:1916 sock_sendmsg_nosec net/socket.c:704 [inline] sock_sendmsg net/socket.c:724 [inline] ____sys_sendmsg+0x5b9/0x910 net/socket.c:2409 ___sys_sendmsg net/socket.c:2463 [inline] __sys_sendmsg+0x280/0x370 net/socket.c:2492 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f289cf23ae9 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:00007f289a436188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 00007f289d0371a0 RCX: 00007f289cf23ae9 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000006 RBP: 00007f289cf7df6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe1ae2cfaf R14: 00007f289a436300 R15: 0000000000022000