------------[ cut here ]------------
WARNING: CPU: 0 PID: 8570 at include/linux/backing-dev.h:286 inode_to_wb include/linux/backing-dev.h:283 [inline]
WARNING: CPU: 0 PID: 8570 at include/linux/backing-dev.h:286 account_page_dirtied+0x3c2/0x480 mm/page-writeback.c:2430
Modules linked in:
CPU: 0 PID: 8570 Comm: syz-executor.5 Not tainted 5.11.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:inode_to_wb include/linux/backing-dev.h:283 [inline]
RIP: 0010:account_page_dirtied+0x3c2/0x480 mm/page-writeback.c:2430
Code: 5d 41 5e 41 5f 5d c3 e8 3c 63 d8 ff 4c 89 f7 4c 89 fe 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d e9 23 bf 20 00 e8 1e 63 d8 ff <0f> 0b 43 80 3c 2c 00 0f 85 87 fe ff ff e9 8a fe ff ff 89 d9 80 e1
RSP: 0018:ffffc90001f9f928 EFLAGS: 00010093
RAX: ffffffff819f7cf2 RBX: ffff888142958890 RCX: ffff88801dc88000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: ffffffff819f7b72 R09: fffffbfff1b6731e
R10: fffffbfff1b6731e R11: 0000000000000000 R12: 1ffff1102852b112
R13: dffffc0000000000 R14: ffffea00009f7e40 R15: ffff888142958718
FS:  0000000001820400(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7115b2f000 CR3: 000000006fb4b000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:
 __set_page_dirty+0x12a/0x380 fs/buffer.c:608
 mark_buffer_dirty+0x227/0x2d0 fs/buffer.c:1137
 gfs2_unpin+0x113/0x9c0 fs/gfs2/lops.c:108
 buf_lo_after_commit+0x172/0x1d0 fs/gfs2/lops.c:740
 lops_after_commit fs/gfs2/lops.h:61 [inline]
 gfs2_log_flush+0xd0e/0x2e70 fs/gfs2/log.c:1016
 do_sync+0xaf4/0xd60 fs/gfs2/quota.c:967
 gfs2_quota_sync+0x379/0x7f0 fs/gfs2/quota.c:1310
 gfs2_sync_fs+0x49/0xb0 fs/gfs2/super.c:760
 __sync_filesystem fs/sync.c:39 [inline]
 sync_filesystem+0xed/0x200 fs/sync.c:64
 generic_shutdown_super+0x6b/0x2a0 fs/super.c:448
 kill_block_super+0x79/0xd0 fs/super.c:1393
 deactivate_locked_super+0xa7/0xf0 fs/super.c:335
 cleanup_mnt+0x462/0x510 fs/namespace.c:1118
 task_work_run+0x137/0x1c0 kernel/task_work.c:140
 tracehook_notify_resume include/linux/tracehook.h:189 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:174 [inline]
 exit_to_user_mode_prepare+0x10b/0x1e0 kernel/entry/common.c:201
 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
 syscall_exit_to_user_mode+0x48/0x180 kernel/entry/common.c:294
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x466f67
Code: ff d0 48 89 c7 b8 3c 00 00 00 0f 05 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc005c83e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000466f67
RDX: 00007ffc005c84bc RSI: 0000000000000002 RDI: 00007ffc005c84b0
RBP: 00007ffc005c84b0 R08: 00000000ffffffff R09: 00007ffc005c8280
R10: 00000000018218ab R11: 0000000000000246 R12: 00000000004af4e4
R13: 00007ffc005c9580 R14: 0000000001821810 R15: 00007ffc005c95c0