[lkml]   [2012]   [Jun]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: Bug in net/ipv6/ip6_fib.c:fib6_dump_table()
On Thu, 2012-06-21 at 14:35 -0500, Josh Hunt wrote:

> Can anyone provide details of the crash which was intended to be fixed
> by 2bec5a369ee79576a3eea2c23863325089785a2c? With this patch in and
> doing concurrent adds/deletes and dumping the table via netlink causes
> duplicate entries to be reported. Reverting this patch causes those
> problems to go away. We can provide a more detailed test if that is
> needed, but so far our testing has been unable to reproduce the crash
> mentioned in the above commit with it reverted.

A mere revert wont be enough.

Looking at this code, it lacks proper synchronization
between tree updaters and tree walkers.

fib6_walker_lock rwlock is not enough to prevent races.

Are you willing to fix this yourself ?

 \ /
  Last update: 2012-06-22 02:41    [W:0.094 / U:0.236 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site