]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
mm/mempool: allow NULL `pool' pointer in mempool_destroy()
authorSergey Senozhatsky <sergey.senozhatsky@gmail.com>
Tue, 8 Sep 2015 22:00:53 +0000 (15:00 -0700)
committerLinus Torvalds <torvalds@linux-foundation.org>
Tue, 8 Sep 2015 22:35:28 +0000 (15:35 -0700)
commit4e3ca3e033d1eea62fa16c3fdbef4f20427bd0de
tree34ff5ce0159e781d1b8ca208ff827e53d37545a8
parent3942d29918522ba6a393c19388301ec04df429cd
mm/mempool: allow NULL `pool' pointer in mempool_destroy()

mempool_destroy() does not tolerate a NULL mempool_t pointer argument and
performs a NULL-pointer dereference.  This requires additional attention
and effort from developers/reviewers and forces all mempool_destroy()
callers to do a NULL check

    if (pool)
        mempool_destroy(pool);

Or, otherwise, be invalid mempool_destroy() users.

Tweak mempool_destroy() and NULL-check the pointer there.

Proposed by Andrew Morton.

Link: https://lkml.org/lkml/2015/6/8/583
Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Julia Lawall <julia.lawall@lip6.fr>
Cc: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
mm/mempool.c