lkml.org 
[lkml]   [2017]   [Oct]   [6]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[BUG] fs/aio: A possible sleep-in-atomic bug in aio_migratepage
Date
According to fs/aio.c, cond_resched is called under a spinlock,
and the function call path is:
aio_migratepage (acquire the spinlock)
migrate_page_copy
copy_huge_page
__copy_gigantic_page
cond_resched
might_sleep

This bug is found by my static analysis tool and my code review.
A possible fix is to remove cond_resched in __copy_gigantic_page.


Thanks,
Jia-Ju Bai


\
 
 \ /
  Last update: 2017-10-07 03:37    [W:0.025 / U:0.736 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site