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 1 extents in 0ms
gfs2: fsid=syz:syz.0: first mount done, others may mount
gfs2: fsid=syz:syz.0: Corruption found in quota_change0file: duplicate identifier in slot 17175
gfs2: fsid=syz:syz.0: warning: assertion "!qd->qd_change" failed - function = gfs2_qd_dispose, file = fs/gfs2/quota.c, line = 129
CPU: 0 UID: 0 PID: 5314 Comm: syz.0.0 Not tainted 6.15.0-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
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 gfs2_assert_warn_i+0x194/0x2c0 fs/gfs2/util.c:416
 gfs2_qd_dispose+0x4aa/0x5b0 fs/gfs2/quota.c:129
 gfs2_quota_init+0xcc8/0x1230 fs/gfs2/quota.c:1469
 gfs2_make_fs_rw+0x3fe/0x540 fs/gfs2/super.c:159
 gfs2_fill_super+0x19f8/0x2050 fs/gfs2/ops_fstype.c:1274
 get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1636
 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1330
 vfs_get_tree+0x8f/0x2b0 fs/super.c:1759
 do_new_mount+0x24a/0xa40 fs/namespace.c:3881
 do_mount fs/namespace.c:4221 [inline]
 __do_sys_mount fs/namespace.c:4432 [inline]
 __se_sys_mount+0x317/0x410 fs/namespace.c:4409
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f79fe39010a
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:00007f79ff2e0e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f79ff2e0ef0 RCX: 00007f79fe39010a
RDX: 0000200000037f40 RSI: 0000200000037f80 RDI: 00007f79ff2e0eb0
RBP: 0000200000037f40 R08: 00007f79ff2e0ef0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000037f80
R13: 00007f79ff2e0eb0 R14: 0000000000037ff2 R15: 00002000000000c0
 </TASK>
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5314 at ./include/linux/backing-dev.h:255 inode_to_wb include/linux/backing-dev.h:251 [inline]
WARNING: CPU: 0 PID: 5314 at ./include/linux/backing-dev.h:255 folio_account_dirtied mm/page-writeback.c:2714 [inline]
WARNING: CPU: 0 PID: 5314 at ./include/linux/backing-dev.h:255 __folio_mark_dirty+0xa4f/0xeb0 mm/page-writeback.c:2766
Modules linked in:
CPU: 0 UID: 0 PID: 5314 Comm: syz.0.0 Not tainted 6.15.0-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:inode_to_wb include/linux/backing-dev.h:251 [inline]
RIP: 0010:folio_account_dirtied mm/page-writeback.c:2714 [inline]
RIP: 0010:__folio_mark_dirty+0xa4f/0xeb0 mm/page-writeback.c:2766
Code: 48 c7 c7 00 3e 74 8b e8 7f d0 8a ff 90 0f 0b 90 90 e9 9e f7 ff ff e8 e0 73 c6 ff 90 0f 0b 90 e9 23 fe ff ff e8 d2 73 c6 ff 90 <0f> 0b 90 e9 3e fa ff ff 89 c2 80 e2 07 80 c2 03 38 ca 0f 8c b6 f7
RSP: 0018:ffffc9000e5c77b8 EFLAGS: 00010046
RAX: ffffffff81f97dfe RBX: ffffea00014b1940 RCX: 0000000000100000
RDX: ffffc9000dd4a000 RSI: 00000000000fffff RDI: 0000000000100000
RBP: 0000000000000001 R08: ffff888031d2ccff R09: 1ffff110063a599f
R10: dffffc0000000000 R11: ffffed10063a59a0 R12: ffff888031d2cb88
R13: 1ffff110063a599f R14: 0000000000000000 R15: ffff888031d2ccf8
FS:  00007f79ff2e16c0(0000) GS:ffff88808d6c2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8736b909c0 CR3: 0000000035618000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 mark_buffer_dirty+0x271/0x410 fs/buffer.c:1212
 gfs2_quota_init+0xda0/0x1230 fs/gfs2/quota.c:1477
 gfs2_make_fs_rw+0x3fe/0x540 fs/gfs2/super.c:159
 gfs2_fill_super+0x19f8/0x2050 fs/gfs2/ops_fstype.c:1274
 get_tree_bdev_flags+0x40b/0x4d0 fs/super.c:1636
 gfs2_get_tree+0x51/0x1e0 fs/gfs2/ops_fstype.c:1330
 vfs_get_tree+0x8f/0x2b0 fs/super.c:1759
 do_new_mount+0x24a/0xa40 fs/namespace.c:3881
 do_mount fs/namespace.c:4221 [inline]
 __do_sys_mount fs/namespace.c:4432 [inline]
 __se_sys_mount+0x317/0x410 fs/namespace.c:4409
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xf6/0x210 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f79fe39010a
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:00007f79ff2e0e68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f79ff2e0ef0 RCX: 00007f79fe39010a
RDX: 0000200000037f40 RSI: 0000200000037f80 RDI: 00007f79ff2e0eb0
RBP: 0000200000037f40 R08: 00007f79ff2e0ef0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000200000037f80
R13: 00007f79ff2e0eb0 R14: 0000000000037ff2 R15: 00002000000000c0
 </TASK>