syzbot

------------[ cut here ]------------
WARNING: CPU: 1 PID: 5893 at include/linux/backing-dev.h:256 inode_to_wb include/linux/backing-dev.h:252 [inline]
WARNING: CPU: 1 PID: 5893 at include/linux/backing-dev.h:256 folio_account_dirtied mm/page-writeback.c:2640 [inline]
WARNING: CPU: 1 PID: 5893 at include/linux/backing-dev.h:256 __folio_mark_dirty+0x912/0x1110 mm/page-writeback.c:2691
Modules linked in:
CPU: 1 PID: 5893 Comm: syz-executor Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:inode_to_wb include/linux/backing-dev.h:252 [inline]
RIP: 0010:folio_account_dirtied mm/page-writeback.c:2640 [inline]
RIP: 0010:__folio_mark_dirty+0x912/0x1110 mm/page-writeback.c:2691
Code: e9 92 f8 ff ff e8 8e 1d cf ff 0f 0b e9 d9 f8 ff ff e8 82 1d cf ff 48 89 df 48 8b 74 24 28 e8 e5 c4 2d 00 eb a6 e8 6e 1d cf ff <0f> 0b e9 84 fb ff ff 89 c2 80 e2 07 80 c2 03 38 ca 0f 8c f2 f8 ff
RSP: 0018:ffffc90003317a20 EFLAGS: 00010093
RAX: ffffffff81b671f2 RBX: ffffea0000855940 RCX: ffff888022569e00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000001 R08: ffff888148c87b0f R09: 1ffff11029190f61
R10: dffffc0000000000 R11: ffffed1029190f62 R12: 1ffff11029190f61
R13: ffff888148c87990 R14: 0000000000000000 R15: ffff888148c87b08
FS:  000055556f2ae500(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00003e720 CR3: 000000006237d000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 mark_buffer_dirty+0x26e/0x4d0 fs/buffer.c:1212
 gfs2_unpin+0x125/0x9a0 fs/gfs2/lops.c:111
 buf_lo_after_commit+0x15e/0x1b0 fs/gfs2/lops.c:745
 lops_after_commit fs/gfs2/lops.h:51 [inline]
 gfs2_log_flush+0x1094/0x24b0 fs/gfs2/log.c:1117
 gfs2_kill_sb+0x5d/0x320 fs/gfs2/ops_fstype.c:1789
 deactivate_locked_super+0x97/0x100 fs/super.c:481
 cleanup_mnt+0x429/0x4c0 fs/namespace.c:1259
 task_work_run+0x1ce/0x250 kernel/task_work.c:239
 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
 exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
 exit_to_user_mode_prepare+0xf6/0x180 kernel/entry/common.c:210
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
 do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2c6ef902f7
Code: a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 a8 ff ff ff f7 d8 64 89 02 b8
RSP: 002b:00007fff2b02da08 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00007f2c6f011d7d RCX: 00007f2c6ef902f7
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007fff2b02dac0
RBP: 00007fff2b02dac0 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000246 R12: 00007fff2b02eb50
R13: 00007f2c6f011d7d R14: 000000000001451b R15: 00007fff2b02eb90
 </TASK>