gfs2: pid: 8000
gfs2: lock type: 8 req lock state : 1
gfs2: G:  s:EX n:8/1 f:qb t:EX d:EX/0 a:0 v:0 r:5 m:20
gfs2:  H: s:EX f:cH e:0 p:8000 [syz-executor.0] gfs2_glock_nq_init fs/gfs2/glock.h:226 [inline]
gfs2:  H: s:EX f:cH e:0 p:8000 [syz-executor.0] do_sync+0x3f0/0xba0 fs/gfs2/quota.c:893
------------[ cut here ]------------
kernel BUG at fs/gfs2/glock.c:1082!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 8000 Comm: syz-executor.0 Not tainted 4.14.281-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff88809f58e2c0 task.stack: ffff88809b5d8000
RIP: 0010:add_to_queue fs/gfs2/glock.c:1082 [inline]
RIP: 0010:gfs2_glock_nq.cold+0x279/0x2d0 fs/gfs2/glock.c:1107
RSP: 0018:ffff88809b5dfa88 EFLAGS: 00010296
RAX: ffffed10136bbf32 RBX: ffff888099f2b2a0 RCX: 1ffff11013eb1d7d
RDX: 0000000000000000 RSI: 0000000000000005 RDI: ffffffff87c0d0f0
RBP: 0000000000001f40 R08: 0000000000000043 R09: 0000000000000004
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a5f45ab0
R13: ffff888099f2b2a0 R14: 0000000000000001 R15: 0000000000000000
FS:  0000555556208400(0000) GS:ffff8880ba500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555555adc708 CR3: 00000000a1254000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 gfs2_glock_nq_init fs/gfs2/glock.h:228 [inline]
 do_sync+0x3f8/0xba0 fs/gfs2/quota.c:893
 gfs2_quota_sync+0x4f1/0x690 fs/gfs2/quota.c:1299
 gfs2_sync_fs+0x40/0xa0 fs/gfs2/super.c:947
 __sync_filesystem fs/sync.c:39 [inline]
 sync_filesystem fs/sync.c:64 [inline]
 sync_filesystem+0xe2/0x230 fs/sync.c:48
 generic_shutdown_super+0x70/0x370 fs/super.c:432
 kill_block_super+0x95/0xe0 fs/super.c:1161
 gfs2_kill_sb+0x12c/0x1a0 fs/gfs2/ops_fstype.c:1409
 deactivate_locked_super+0x6c/0xd0 fs/super.c:319
 deactivate_super+0x7f/0xa0 fs/super.c:350
 cleanup_mnt+0x186/0x2c0 fs/namespace.c:1183
 task_work_run+0x11f/0x190 kernel/task_work.c:113
 tracehook_notify_resume include/linux/tracehook.h:191 [inline]
 exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x7f5085f17577
RSP: 002b:00007ffea15088f8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f5085f17577
RDX: 00007ffea15089ca RSI: 000000000000000a RDI: 00007ffea15089c0
RBP: 00007ffea15089c0 R08: 00000000ffffffff R09: 00007ffea1508790
R10: 0000555556209903 R11: 0000000000000246 R12: 00007f5085f6f1f8
R13: 00007ffea1509a80 R14: 0000555556209810 R15: 00007ffea1509ac0
Code: c1 ea 03 0f b6 04 02 84 c0 74 04 3c 03 7e 6c 8b 73 18 44 89 f2 48 c7 c7 c0 ae c0 87 e8 02 84 f9 ff 4c 89 ee 31 ff e8 e0 ad b0 fb <0f> 0b e8 c9 92 75 fa 4c 8b 04 24 e9 ac fd ff ff 31 ed e9 14 fe 
RIP: add_to_queue fs/gfs2/glock.c:1082 [inline] RSP: ffff88809b5dfa88
RIP: gfs2_glock_nq.cold+0x279/0x2d0 fs/gfs2/glock.c:1107 RSP: ffff88809b5dfa88
---[ end trace 184a880a1987a824 ]---