loop0: detected capacity change from 0 to 32768
gfs2: fsid=syz:syz: Trying to join cluster "lock_nolock", "syz:syz"
gfs2: fsid=syz:syz: Now mounting FS (format 1801)...
gfs2: fsid=syz:syz.0: journal 0 mapped with 3 extents in 0ms
gfs2: fsid=syz:syz.0: first mount done, others may mount
gfs2: fsid=syz:syz.0: found 1 quota changes
------------[ cut here ]------------
kernel BUG at fs/gfs2/quota.c:331!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5329 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:qd_put+0x1a2/0x1b0 fs/gfs2/quota.c:331
Code: 0d fe e9 da fe ff ff 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 6f ff ff ff 48 89 ef e8 39 78 0d fe e9 62 ff ff ff e8 7f 9a a1 fd 90 <0f> 0b 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000e1f7be8 EFLAGS: 00010287
RAX: ffffffff842429f1 RBX: ffff888011a133f0 RCX: 0000000000100000
RDX: ffffc9000ef5a000 RSI: 000000000002bb27 RDI: 000000000002bb28
RBP: 00000000ffffff80 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001c3ef64 R12: ffff888011a13460
R13: dffffc0000000000 R14: ffff888011a13420 R15: 1ffff1100234268c
FS:  00007f31c046e6c0(0000) GS:ffff88808ca49000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8916178d50 CR3: 0000000012666000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 gfs2_quota_sync+0x3cf/0x470 fs/gfs2/quota.c:1362
 gfs2_sync_fs+0x4c/0xb0 fs/gfs2/super.c:660
 sync_filesystem+0xee/0x230 fs/sync.c:56
 generic_shutdown_super+0x77/0x2d0 fs/super.c:625
 kill_block_super+0x44/0x90 fs/super.c:1725
 deactivate_locked_super+0xbc/0x130 fs/super.c:476
 cleanup_mnt+0x437/0x4d0 fs/namespace.c:1312
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 __exit_to_user_mode_loop kernel/entry/common.c:67 [inline]
 exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:98
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f31bf59c819
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:00007f31c046dfe8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f31bf815fa0 RCX: 00007f31bf59c819
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000000000004
RBP: 00007f31bf632c91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f31bf816038 R14: 00007f31bf815fa0 R15: 00007ffe5efd6988
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:qd_put+0x1a2/0x1b0 fs/gfs2/quota.c:331
Code: 0d fe e9 da fe ff ff 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 6f ff ff ff 48 89 ef e8 39 78 0d fe e9 62 ff ff ff e8 7f 9a a1 fd 90 <0f> 0b 66 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000e1f7be8 EFLAGS: 00010287
RAX: ffffffff842429f1 RBX: ffff888011a133f0 RCX: 0000000000100000
RDX: ffffc9000ef5a000 RSI: 000000000002bb27 RDI: 000000000002bb28
RBP: 00000000ffffff80 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001c3ef64 R12: ffff888011a13460
R13: dffffc0000000000 R14: ffff888011a13420 R15: 1ffff1100234268c
FS:  00007f31c046e6c0(0000) GS:ffff88808ca49000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8916178d50 CR3: 0000000012666000 CR4: 0000000000352ef0