[BUG] fs/super: a possible sleep-in-atomic bug in put_super
Date
Fri, 6 Oct 2017 16:59:18 +0800
According to fs/super.c, the kernel may sleep under a spinlock. The function call path is: put_super (acquire the spinlock) __put_super destroy_super list_lru_destroy list_lru_unregister mutex_lock --> may sleep memcg_get_cache_ids down_read --> may sleep
This bug is found by my static analysis tool and my code review.