------------[ cut here ]------------
refcount_t: underflow; use-after-free.
WARNING: lib/refcount.c:28 at refcount_warn_saturate+0xb2/0x110, CPU#0: syz.1.24894/8800
Modules linked in:
CPU: 0 UID: 0 PID: 8800 Comm: syz.1.24894 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:refcount_warn_saturate+0xb2/0x110
Code: 24 85 89 0b 67 48 0f b9 3a eb 4a e8 98 b0 13 fd 48 8d 3d 21 85 89 0b 67 48 0f b9 3a eb 37 e8 85 b0 13 fd 48 8d 3d 1e 85 89 0b <67> 48 0f b9 3a eb 24 e8 72 b0 13 fd 48 8d 3d 1b 85 89 0b 67 48 0f
RSP: 0018:ffffc900065f7080 EFLAGS: 00010293
RAX: ffffffff84b20eeb RBX: 0000000000000003 RCX: ffff88810f921d80
RDX: 0000000000000000 RSI: ffffffff8f10f400 RDI: ffffffff903b9410
RBP: 1ffff11037b31e4b R08: ffff88810f921d80 R09: 0000000000000005
R10: 0000000000000004 R11: 0000000000000000 R12: ffffffff8feae980
R13: dffffc0000000000 R14: ffff8881be46ab00 R15: 0000000000000000
FS:  00007f5f2506c6c0(0000) GS:ffff88818dc8d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f5f2504bd58 CR3: 0000000170ef6000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 inet_release+0x143/0x190
 sock_release+0x85/0x150
 rxe_net_del+0x121/0x2e0
 rxe_dellink+0x15/0x20
 nldev_dellink+0x304/0x3d0
 rdma_nl_rcv+0x6d1/0xa10
 netlink_unicast+0x75c/0x8e0
 netlink_sendmsg+0x813/0xb40
 ____sys_sendmsg+0x972/0x9f0
 ___sys_sendmsg+0x2a5/0x360
 __x64_sys_sendmsg+0x1bd/0x2a0
 do_syscall_64+0x15f/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5f2419cdd9
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:00007f5f2506c028 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00007f5f24415fa0 RCX: 00007f5f2419cdd9
RDX: 0000000000000004 RSI: 0000200000004680 RDI: 0000000000000008
RBP: 00007f5f24232d69 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5f24416038 R14: 00007f5f24415fa0 R15: 00007ffc46f04028
 </TASK>
