gfs2: fsid=syz:syz.0: Corruption found in quota_change0file: duplicate identifier in slot 176779
gfs2: fsid=syz:syz.0: warning: assertion "!qd->qd_change" failed - function = gfs2_qd_dispose, file = fs/gfs2/quota.c, line = 129
------------[ cut here ]------------
kernel BUG at fs/gfs2/util.c:303!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5774 Comm: syz.0.15 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:gfs2_assert_warn_i+0x2bb/0x2c0 fs/gfs2/util.c:303
Code: fe 48 c7 c7 00 0f 1a 8c 4c 89 ee 48 8b 54 24 08 48 8b 4c 24 10 4c 8b 44 24 18 44 8b 4c 24 04 e8 4b 52 00 fd e8 d6 be 9e fd 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f
RSP: 0018:ffffc900033c7778 EFLAGS: 00010293
RAX: ffffffff8427059a RBX: 1ffff11003f3e057 RCX: ffff88803b1224c0
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000
RBP: 1ffff11003f3e270 R08: ffffc900033c7507 R09: 1ffff92000678ea0
R10: dffffc0000000000 R11: fffff52000678ea1 R12: ffff88801f9f02bc
R13: ffff88801f9f0000 R14: 0000000000000004 R15: dffffc0000000000
FS:  00007f826976e6c0(0000) GS:ffff88808ca4c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4f997909c0 CR3: 0000000044138000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 gfs2_qd_dispose+0x466/0x570 fs/gfs2/quota.c:129
 gfs2_quota_init+0xcd4/0x1220 fs/gfs2/quota.c:1470
 gfs2_make_fs_rw+0x143/0x230 fs/gfs2/super.c:149
 gfs2_fill_super+0x1ba5/0x21d0 fs/gfs2/ops_fstype.c:1275
 get_tree_bdev_flags+0x431/0x4f0 fs/super.c:1694
 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1332
 vfs_get_tree+0x92/0x2a0 fs/super.c:1754
 fc_mount fs/namespace.c:1193 [inline]
 do_new_mount_fc fs/namespace.c:3763 [inline]
 do_new_mount+0x341/0xd30 fs/namespace.c:3839
 do_mount fs/namespace.c:4172 [inline]
 __do_sys_mount fs/namespace.c:4361 [inline]
 __se_sys_mount+0x31d/0x420 fs/namespace.c:4338
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f82689896ca
Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 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:00007f826976de58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f826976dee0 RCX: 00007f82689896ca
RDX: 0000000020021140 RSI: 0000000020021180 RDI: 00007f826976dea0
RBP: 0000000020021140 R08: 00007f826976dee0 R09: 000000000300c888
R10: 000000000300c888 R11: 0000000000000246 R12: 0000000020021180
R13: 00007f826976dea0 R14: 0000000000021170 R15: 0000000020000180
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:gfs2_assert_warn_i+0x2bb/0x2c0 fs/gfs2/util.c:303
Code: fe 48 c7 c7 00 0f 1a 8c 4c 89 ee 48 8b 54 24 08 48 8b 4c 24 10 4c 8b 44 24 18 44 8b 4c 24 04 e8 4b 52 00 fd e8 d6 be 9e fd 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f
RSP: 0018:ffffc900033c7778 EFLAGS: 00010293
RAX: ffffffff8427059a RBX: 1ffff11003f3e057 RCX: ffff88803b1224c0
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000
RBP: 1ffff11003f3e270 R08: ffffc900033c7507 R09: 1ffff92000678ea0
R10: dffffc0000000000 R11: fffff52000678ea1 R12: ffff88801f9f02bc
R13: ffff88801f9f0000 R14: 0000000000000004 R15: dffffc0000000000
FS:  00007f826976e6c0(0000) GS:ffff88808ca4c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4f997909c0 CR3: 0000000044138000 CR4: 0000000000352ef0