============================================
WARNING: possible recursive locking detected
5.15.175-syzkaller #0 Not tainted
--------------------------------------------
kworker/1:2/1961 is trying to acquire lock:
ffff0000c67e7538 ((wq_completion)delete_workqueue){+.+.}-{0:0}, at: flush_workqueue+0x120/0x11c4 kernel/workqueue.c:2830

but task is already holding lock:
ffff0000c67e7538 ((wq_completion)delete_workqueue){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 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/1:2/1961:
 #0: ffff0000c67e7538 ((wq_completion)delete_workqueue){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283
 #1: ffff800025457c00 ((work_completion)(&(&gl->gl_delete)->work)){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285

stack backtrace:
CPU: 1 PID: 1961 Comm: kworker/1:2 Not tainted 5.15.175-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024
Workqueue: delete_workqueue delete_work_func
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 dump_stack+0x1c/0x58 lib/dump_stack.c:113
 __lock_acquire+0x62bc/0x7638 kernel/locking/lockdep.c:5012
 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623
 flush_workqueue+0x14c/0x11c4 kernel/workqueue.c:2830
 gfs2_flush_delete_work+0x34/0x44 fs/gfs2/glock.c:2108
 gfs2_make_fs_ro+0xb4/0x554 fs/gfs2/super.c:529
 signal_our_withdraw fs/gfs2/util.c:166 [inline]
 gfs2_withdraw+0x4ec/0x12a4 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+0x2c8/0x394 fs/gfs2/meta_io.c:493
 gfs2_meta_inode_buffer fs/gfs2/meta_io.h:70 [inline]
 gfs2_inode_refresh+0xc4/0xdf4 fs/gfs2/glops.c:481
 gfs2_inode_lookup+0x7a8/0xbd8 fs/gfs2/inode.c:199
 gfs2_lookup_by_inum+0x60/0xf8 fs/gfs2/inode.c:250
 delete_work_func+0x148/0x58c fs/gfs2/glock.c:1004
 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
 worker_thread+0x910/0x1034 kernel/workqueue.c:2457
 kthread+0x37c/0x45c kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870