gfs2: fsid=syz:syz.0: Corruption found in quota_change0file: duplicate identifier in slot 82152
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:405!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5781 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~bpo12+1 04/01/2014
RIP: 0010:gfs2_assert_warn_i+0x2bb/0x2c0 fs/gfs2/util.c:405
Code: fe 48 c7 c7 40 65 d1 8b 4c 89 ee 48 8b 54 24 08 48 8b 4c 24 10 4c 8b 44 24 18 44 8b 4c 24 04 e8 db f7 27 fd e8 46 71 c0 fd 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66
RSP: 0018:ffffc90002acf7b8 EFLAGS: 00010293
RAX: ffffffff83ff49ea RBX: 1ffff11009e1a857 RCX: ffff888000472440
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000
RBP: 1ffff11009e1aa5d R08: ffff88801fc24253 R09: 1ffff11003f8484a
R10: dffffc0000000000 R11: ffffed1003f8484b R12: ffff88804f0d42bc
R13: ffff88804f0d4000 R14: 0000000000000004 R15: dffffc0000000000
FS:  00007f68bd56d6c0(0000) GS:ffff88808d210000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd471dba000 CR3: 000000004f039000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 gfs2_qd_dispose+0x4aa/0x5b0 fs/gfs2/quota.c:129
 gfs2_quota_init+0xcc8/0x1230 fs/gfs2/quota.c:1469
 gfs2_make_fs_rw+0x181/0x2b0 fs/gfs2/super.c:149
 gfs2_fill_super+0x1a7b/0x20d0 fs/gfs2/ops_fstype.c:1278
 get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1692
 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1335
 vfs_get_tree+0x92/0x2b0 fs/super.c:1815
 do_new_mount+0x2a2/0x9e0 fs/namespace.c:3808
 do_mount fs/namespace.c:4136 [inline]
 __do_sys_mount fs/namespace.c:4347 [inline]
 __se_sys_mount+0x317/0x410 fs/namespace.c:4324
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f68bc77f79a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 00 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f68bd56ce68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f68bd56cef0 RCX: 00007f68bc77f79a
RDX: 0000000020021140 RSI: 0000000020021180 RDI: 00007f68bd56ceb0
RBP: 0000000020021140 R08: 00007f68bd56cef0 R09: 000000000300c888
R10: 000000000300c888 R11: 0000000000000246 R12: 0000000020021180
R13: 00007f68bd56ceb0 R14: 000000000002119d R15: 0000000020000080
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:gfs2_assert_warn_i+0x2bb/0x2c0 fs/gfs2/util.c:405
Code: fe 48 c7 c7 40 65 d1 8b 4c 89 ee 48 8b 54 24 08 48 8b 4c 24 10 4c 8b 44 24 18 44 8b 4c 24 04 e8 db f7 27 fd e8 46 71 c0 fd 90 <0f> 0b 0f 1f 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 66
RSP: 0018:ffffc90002acf7b8 EFLAGS: 00010293
RAX: ffffffff83ff49ea RBX: 1ffff11009e1a857 RCX: ffff888000472440
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000000
RBP: 1ffff11009e1aa5d R08: ffff88801fc24253 R09: 1ffff11003f8484a
R10: dffffc0000000000 R11: ffffed1003f8484b R12: ffff88804f0d42bc
R13: ffff88804f0d4000 R14: 0000000000000004 R15: dffffc0000000000
FS:  00007f68bd56d6c0(0000) GS:ffff88808d210000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd471dba000 CR3: 000000004f039000 CR4: 0000000000352ef0