FAT-fs (loop4): error, fat_free_clusters: deleting FAT entry beyond EOF
FAT-fs (loop4): Filesystem has been set read-only
INFO: task syz-executor.5:12588 blocked for more than 140 seconds.
      Not tainted 4.19.121-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.5  D28232 12588   6911 0x80000002
Call Trace:
 schedule+0x8d/0x1b0 kernel/sched/core.c:3559
 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:3617
 __mutex_lock_common kernel/locking/mutex.c:1002 [inline]
 __mutex_lock+0x726/0x1300 kernel/locking/mutex.c:1072
 perf_trace_destroy+0x23/0xf0 kernel/trace/trace_event_perf.c:236
 _free_event+0x33b/0x1170 kernel/events/core.c:4454