[lkml]   [2011]   [Aug]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [Stable-review] [07/55] SUNRPC: Fix a race between work-queue and rpc_killall_tasks
On Fri, 2011-08-05 at 17:01 -0700, Greg KH wrote:
> 2.6.32-longterm review patch. If anyone has any objections, please let us know.
> ------------------
> From: Trond Myklebust <>
> commit b55c59892e1f3b6c7d4b9ccffb4263e1486fb990 upstream.
> Since rpc_killall_tasks may modify the rpc_task's tk_action field
> without any locking, we need to be careful when dereferencing it.

This isn't nearly careful enough to avoid races. You must at least use
the ACCESS_ONCE macro, otherwise the compiler can just optimise away the
local variable this introduces.


[unhandled content-type:application/pgp-signature]
 \ /
  Last update: 2011-08-07 20:25    [W:0.214 / U:1.208 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site