tree b07d1033d8980256d596686d75c2207b1f2cce0a
parent 1be53963b0519bd3681749a9bed8b83aeb005cca
author Serge E. Hallyn <serue@us.ibm.com> 1260924447 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1260976809 -0800

ipc ns: fix memory leak (idr)

We have apparently had a memory leak since
7ca7e564e049d8b350ec9d958ff25eaa24226352 "ipc: store ipcs into IDRs" in
2007.  The idr of which 3 exist for each ipc namespace is never freed.

This patch simply frees them when the ipcns is freed.  I don't believe any
idr_remove() are done from rcu (and could therefore be delayed until after
this idr_destroy()), so the patch should be safe.  Some quick testing
showed no harm, and the memory leak fixed.

Caught by kmemleak.

Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>