lkml.org 
[lkml]   [2010]   [Jun]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: 2.6.35-rc2 module reference counting broken
Hello,

On 06/10/2010 08:34 AM, Jari Ruusu wrote:
> Later in the mount system call handling the module refrence count is
> incremented. But to me that looks like there is a window of opportunity for
> things to go wrong. What is there to prevent module from being removed at
> zero refcount?

It can be removed, in which case blkdev_get() fails and the whole open
attempt fails, which is the expected behavior. Claiming block just
needs access to the containing struct block_device, caring for the
actual device and backing module is blkdev_get()'s job.

Thanks.

--
tejun


\
 
 \ /
  Last update: 2010-06-10 13:35    [W:0.043 / U:0.436 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site