gfs2: fsid=syz:syz.0: fatal assertion failed
------------[ cut here ]------------
kernel BUG at fs/gfs2/quota.c:320!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5337 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~bpo12+1 04/01/2014
RIP: 0010:__qd_hold fs/gfs2/quota.c:320 [inline]
RIP: 0010:do_qc+0x5c1/0x5e0 fs/gfs2/quota.c:705
Code: 00 00 00 00 00 fc ff df 48 8b 0c 24 80 3c 01 00 74 0a 48 8b 7c 24 10 e8 4d 79 22 fe 48 8b 44 24 10 48 8b 38 e8 f0 4f 23 fd 90 <0f> 0b e8 88 92 ba fd 48 8b 7c 24 10 e8 de 4f 23 fd 90 0f 0b 66 66
RSP: 0018:ffffc9000cbff028 EFLAGS: 00010246
RAX: 000000000000002c RBX: 1ffff11008e6fa0e RCX: 507661718f096900
RDX: ffffc90021593000 RSI: 00000000000012a7 RDI: 00000000000012a8
RBP: 000000000000001f R08: ffffc9000cbfed47 R09: 1ffff9200197fda8
R10: dffffc0000000000 R11: fffff5200197fda9 R12: ffff88804737d000
R13: ffff88804737d070 R14: ffff88804737d090 R15: 0000000000000000
FS:  00007f00777e16c0(0000) GS:ffff88808d22a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3db599c000 CR3: 0000000039dda000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 gfs2_quota_change+0x391/0x800 fs/gfs2/quota.c:1304
 gfs2_alloc_blocks+0x18bc/0x2080 fs/gfs2/rgrp.c:2494
 __gfs2_iomap_alloc+0x4b7/0x1a30 fs/gfs2/bmap.c:708
 gfs2_iomap_alloc+0x150/0x1d0 fs/gfs2/bmap.c:1433
 fallocate_chunk fs/gfs2/file.c:1200 [inline]
 __gfs2_fallocate+0xf8d/0x1c20 fs/gfs2/file.c:1339
 gfs2_fallocate+0x340/0x470 fs/gfs2/file.c:1403
 vfs_fallocate+0x669/0x7e0 fs/open.c:339
 ioctl_preallocate fs/ioctl.c:289 [inline]
 file_ioctl+0x611/0x780 fs/ioctl.c:-1
 do_vfs_ioctl+0xb33/0x1430 fs/ioctl.c:576
 __do_sys_ioctl fs/ioctl.c:595 [inline]
 __se_sys_ioctl+0x82/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f007698f7c9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f00777e1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f0076be6090 RCX: 00007f007698f7c9
RDX: 0000200000000240 RSI: 0000000040305828 RDI: 000000000000000a
RBP: 00007f0076a13f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0076be6128 R14: 00007f0076be6090 R15: 00007ffecf938388
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__qd_hold fs/gfs2/quota.c:320 [inline]
RIP: 0010:do_qc+0x5c1/0x5e0 fs/gfs2/quota.c:705
Code: 00 00 00 00 00 fc ff df 48 8b 0c 24 80 3c 01 00 74 0a 48 8b 7c 24 10 e8 4d 79 22 fe 48 8b 44 24 10 48 8b 38 e8 f0 4f 23 fd 90 <0f> 0b e8 88 92 ba fd 48 8b 7c 24 10 e8 de 4f 23 fd 90 0f 0b 66 66
RSP: 0018:ffffc9000cbff028 EFLAGS: 00010246
RAX: 000000000000002c RBX: 1ffff11008e6fa0e RCX: 507661718f096900
RDX: ffffc90021593000 RSI: 00000000000012a7 RDI: 00000000000012a8
RBP: 000000000000001f R08: ffffc9000cbfed47 R09: 1ffff9200197fda8
R10: dffffc0000000000 R11: fffff5200197fda9 R12: ffff88804737d000
R13: ffff88804737d070 R14: ffff88804737d090 R15: 0000000000000000
FS:  00007f00777e16c0(0000) GS:ffff88808d22a000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f3db599c000 CR3: 0000000039dda000 CR4: 0000000000352ef0