loop0: detected capacity change from 0 to 1024
EXT4-fs (loop0): VFS: Can't find ext4 filesystem
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
------------[ cut here ]------------
WARNING: CPU: 0 PID: 5316 at ./include/linux/backing-dev.h:255 inode_to_wb include/linux/backing-dev.h:251 [inline]
WARNING: CPU: 0 PID: 5316 at ./include/linux/backing-dev.h:255 folio_account_dirtied mm/page-writeback.c:2714 [inline]
WARNING: CPU: 0 PID: 5316 at ./include/linux/backing-dev.h:255 __folio_mark_dirty+0xa4f/0xeb0 mm/page-writeback.c:2766
Modules linked in:
CPU: 0 UID: 60928 PID: 5316 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:ffffc9000fee7668 EFLAGS: 00010093
RAX: ffffffff81f97dfe RBX: ffffea00010adb00 RCX: ffff8880002d2440
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffff888000874cff R09: 1ffff1100010e99f
R10: dffffc0000000000 R11: ffffed100010e9a0 R12: ffff888000874b88
R13: 1ffff1100010e99f R14: 0000000000000000 R15: ffff888000874cf8
FS:  0000000000000000(0000) GS:ffff88808d6c2000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f6878e939a0 CR3: 0000000050e29000 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_unpin+0x125/0x9c0 fs/gfs2/lops.c:111
 buf_lo_after_commit+0x15e/0x1b0 fs/gfs2/lops.c:736
 lops_after_commit fs/gfs2/lops.h:51 [inline]
 gfs2_log_flush+0x109f/0x24c0 fs/gfs2/log.c:1115
 gfs2_kill_sb+0x5d/0x340 fs/gfs2/ops_fstype.c:1775
 deactivate_locked_super+0xbc/0x130 fs/super.c:473
 cleanup_mnt+0x425/0x4c0 fs/namespace.c:1431
 task_work_run+0x1d1/0x260 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x8d6/0x2550 kernel/exit.c:953
 do_group_exit+0x21c/0x2d0 kernel/exit.c:1102
 get_signal+0x125e/0x1310 kernel/signal.c:3034
 arch_do_signal_or_restart+0x95/0x780 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:329 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0x8b/0x120 kernel/entry/common.c:218
 do_syscall_64+0x103/0x210 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6877f8e969
Code: Unable to access opcode bytes at 0x7f6877f8e93f.
RSP: 002b:00007f6878eb40e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: 0000000000000001 RBX: 00007f68781b5fa8 RCX: 00007f6877f8e969
RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f68781b5fac
RBP: 00007f68781b5fa0 R08: 7fffffffffffffff R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 00007f68781b5fac
R13: 0000000000000000 R14: 00007ffd2ae4f920 R15: 00007ffd2ae4fa08
 </TASK>