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GID entry ref leak for dev syz1 index 2 ref=1
WARNING: drivers/infiniband/core/cache.c:806 at release_gid_table drivers/infiniband/core/cache.c:806 [inline], CPU#3: kworker/u32:5/15455
WARNING: drivers/infiniband/core/cache.c:806 at gid_table_release_one+0x1ad/0x450 drivers/infiniband/core/cache.c:886, CPU#3: kworker/u32:5/15455
Modules linked in:
CPU: 3 UID: 0 PID: 15455 Comm: kworker/u32:5 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Workqueue: ib-unreg-wq ib_unregister_work
RIP: 0010:release_gid_table drivers/infiniband/core/cache.c:806 [inline]
RIP: 0010:gid_table_release_one+0x1b6/0x450 drivers/infiniband/core/cache.c:886
Code: 4c 24 38 48 c1 e8 03 4d 01 fc 48 89 44 24 08 eb 54 48 89 34 24 e8 aa 67 4f f9 48 8d 3d 63 88 26 08 48 8b 34 24 89 e9 44 89 f2 <67> 48 0f b9 3a e8 90 67 4f f9 48 89 d8 41 83 c6 01 48 c1 e8 03 42
RSP: 0018:ffffc90004ee7ac8 EFLAGS: 00010293
RAX: 0000000000000000 RBX: ffff88801370ee00 RCX: 0000000000000001
RDX: 0000000000000002 RSI: ffff88805f8d15e0 RDI: ffffffff90958bb0
RBP: 0000000000000001 R08: 0000000000000000 R09: ffffed1004663c80
R10: ffff88802331e403 R11: 0000000000002ba1 R12: ffffed10026e1ddb
R13: ffff888066920000 R14: 0000000000000002 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8880979fc000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000f5485da4 CR3: 0000000057c7f000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 000000000000000e DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ib_device_release+0xef/0x1e0 drivers/infiniband/core/device.c:509
 device_release+0xa4/0x240 drivers/base/core.c:2565
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x1ef/0x6f0 lib/kobject.c:737
 put_device+0x1f/0x30 drivers/base/core.c:3797
 process_one_work+0x9ba/0x1b20 kernel/workqueue.c:3257
 process_scheduled_works kernel/workqueue.c:3340 [inline]
 worker_thread+0x6c8/0xf10 kernel/workqueue.c:3421
 kthread+0x3c5/0x780 kernel/kthread.c:463
 ret_from_fork+0x983/0xb10 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>
----------------
Code disassembly (best guess):
   0:	4c 24 38             	rex.WR and $0x38,%al
   3:	48 c1 e8 03          	shr    $0x3,%rax
   7:	4d 01 fc             	add    %r15,%r12
   a:	48 89 44 24 08       	mov    %rax,0x8(%rsp)
   f:	eb 54                	jmp    0x65
  11:	48 89 34 24          	mov    %rsi,(%rsp)
  15:	e8 aa 67 4f f9       	call   0xf94f67c4
  1a:	48 8d 3d 63 88 26 08 	lea    0x8268863(%rip),%rdi        # 0x8268884
  21:	48 8b 34 24          	mov    (%rsp),%rsi
  25:	89 e9                	mov    %ebp,%ecx
  27:	44 89 f2             	mov    %r14d,%edx
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e8 90 67 4f f9       	call   0xf94f67c4
  34:	48 89 d8             	mov    %rbx,%rax
  37:	41 83 c6 01          	add    $0x1,%r14d
  3b:	48 c1 e8 03          	shr    $0x3,%rax
  3f:	42                   	rex.X