Re: [BUG] fs/super: a possible sleep-in-atomic bug in put_super

[Michal Hocko]

[CC Vladimir]

On Fri 06-10-17 16:59:18, Jia-Ju Bai wrote:
> 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.
> 
> Thanks,
> Jia-Ju Bai

-- 
Michal Hocko
SUSE Labs