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
netlink: 'syz.0.0': attribute type 21 has an invalid length.
------------[ cut here ]------------
kernel BUG at fs/gfs2/quota.c:345!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5315 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+0x1a6/0x1b0 fs/gfs2/quota.c:345
Code: ea fd e9 d6 fe ff ff 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 6f ff ff ff 48 89 ef e8 55 e8 ea fd e9 62 ff ff ff e8 2b 9f 79 fd 90 <0f> 0b 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000e017b90 EFLAGS: 00010287
RAX: ffffffff844d9595 RBX: ffff88801af183f0 RCX: 0000000000100000
RDX: ffffc9000f2d9000 RSI: 0000000000001692 RDI: 0000000000001693
RBP: 00000000ffffff80 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001c02f5c R12: ffff88801af18460
R13: ffff888050a8c800 R14: ffff88801af18420 R15: 1ffff110035e308c
FS:  00007f4f1714e6c0(0000) GS:ffff88808c30a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4f163f22e0 CR3: 0000000012d64000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 gfs2_quota_sync+0x3b1/0x450 fs/gfs2/quota.c:1376
 gfs2_sync_fs+0x4c/0xb0 fs/gfs2/super.c:662
 sync_filesystem+0xf1/0x240 fs/sync.c:56
 gfs2_reconfigure+0xb7/0xb20 fs/gfs2/ops_fstype.c:1555
 reconfigure_super+0x232/0x8f0 fs/super.c:1143
 do_remount fs/namespace.c:3410 [inline]
 path_mount+0xd4e/0x1050 fs/namespace.c:4160
 do_mount fs/namespace.c:4181 [inline]
 __do_sys_mount fs/namespace.c:4397 [inline]
 __se_sys_mount+0x31d/0x420 fs/namespace.c:4374
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f4f1619e0d9
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:00007f4f1714dfe8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f4f16425fa0 RCX: 00007f4f1619e0d9
RDX: 0000000000000000 RSI: 0000200000000140 RDI: 0000000000000000
RBP: 00007f4f16235024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000200022 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4f16426038 R14: 00007f4f16425fa0 R15: 00007fffffa7a3e8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:qd_put+0x1a6/0x1b0 fs/gfs2/quota.c:345
Code: ea fd e9 d6 fe ff ff 89 e9 80 e1 07 80 c1 03 38 c1 0f 8c 6f ff ff ff 48 89 ef e8 55 e8 ea fd e9 62 ff ff ff e8 2b 9f 79 fd 90 <0f> 0b 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000e017b90 EFLAGS: 00010287
RAX: ffffffff844d9595 RBX: ffff88801af183f0 RCX: 0000000000100000
RDX: ffffc9000f2d9000 RSI: 0000000000001692 RDI: 0000000000001693
RBP: 00000000ffffff80 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff52001c02f5c R12: ffff88801af18460
R13: ffff888050a8c800 R14: ffff88801af18420 R15: 1ffff110035e308c
FS:  00007f4f1714e6c0(0000) GS:ffff88808c30a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4f163f22e0 CR3: 0000000012d64000 CR4: 0000000000352ef0