function = gfs2_meta_buffer, file = fs/gfs2/meta_io.c, line = 493
gfs2: fsid=syz:syz.0: about to withdraw this file system
============================================
WARNING: possible recursive locking detected
5.15.182-syzkaller #0 Not tainted
--------------------------------------------
kworker/1:10/4222 is trying to acquire lock:
ffff0000c6b53538 ((wq_completion)delete_workqueue){+.+.}-{0:0}, at: flush_workqueue+0xf4/0x1024 kernel/workqueue.c:2827

but task is already holding lock:
ffff0000c6b53538 ((wq_completion)delete_workqueue){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock((wq_completion)delete_workqueue);
  lock((wq_completion)delete_workqueue);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

2 locks held by kworker/1:10/4222:
 #0: ffff0000c6b53538 ((wq_completion)delete_workqueue){+.+.}-{0:0}, at: process_one_work+0x678/0x1140 kernel/workqueue.c:2283
 #1: ffff80001fff7c00 ((work_completion)(&(&gl->gl_delete)->work)){+.+.}-{0:0}, at: process_one_work+0x6b8/0x1140 kernel/workqueue.c:2285

stack backtrace:
CPU: 1 PID: 4222 Comm: kworker/1:10 Not tainted 5.15.182-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
Workqueue: delete_workqueue delete_work_func
Call trace:
 dump_backtrace+0x0/0x43c arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack+0x30/0x40 lib/dump_stack.c:88
 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106
 dump_stack+0x1c/0x5c lib/dump_stack.c:113
 __lock_acquire+0x18a4/0x651c kernel/locking/lockdep.c:-1
 lock_acquire+0x1f4/0x620 kernel/locking/lockdep.c:5623
 flush_workqueue+0x11c/0x1024 kernel/workqueue.c:2830
 gfs2_flush_delete_work+0x34/0x44 fs/gfs2/glock.c:2108
 gfs2_make_fs_ro+0xb4/0x51c fs/gfs2/super.c:529
 signal_our_withdraw fs/gfs2/util.c:166 [inline]
 gfs2_withdraw+0x4cc/0x129c fs/gfs2/util.c:343
 gfs2_meta_check_ii+0x80/0x9c fs/gfs2/util.c:498
 gfs2_metatype_check_i fs/gfs2/util.h:126 [inline]
 gfs2_meta_buffer+0x228/0x2ec fs/gfs2/meta_io.c:493
 gfs2_meta_inode_buffer fs/gfs2/meta_io.h:70 [inline]
 gfs2_inode_refresh+0xac/0xda8 fs/gfs2/glops.c:481
 gfs2_inode_lookup+0x69c/0xb64 fs/gfs2/inode.c:199
 gfs2_lookup_by_inum+0x60/0xf8 fs/gfs2/inode.c:250
 delete_work_func+0x148/0x52c fs/gfs2/glock.c:1004
 process_one_work+0x79c/0x1140 kernel/workqueue.c:2310
 worker_thread+0x8f4/0x101c kernel/workqueue.c:2457
 kthread+0x374/0x454 kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870