On Tue, Jun 9, 2015 at 8:04 AM, Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx> wrote: > zpool_destroy_pool() does not tolerate a NULL zpool pointer > argument and performs a NULL-pointer dereference. Although > there is only one zpool_destroy_pool() user (as of 4.1), > still update it to be coherent with the corresponding > destroy() functions of the remainig pool-allocators (slab, > mempool, etc.), which now allow NULL pool-pointers. > > For consistency, tweak zpool_destroy_pool() and NULL-check the > pointer there. > > Proposed by Andrew Morton. > > Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx> > Reported-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> > LKML-reference: https://lkml.org/lkml/2015/6/8/583 Acked-by: Dan Streetman <ddstreet@xxxxxxxx> > --- > mm/zpool.c | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/mm/zpool.c b/mm/zpool.c > index bacdab6..2f59b90 100644 > --- a/mm/zpool.c > +++ b/mm/zpool.c > @@ -202,6 +202,9 @@ struct zpool *zpool_create_pool(char *type, char *name, gfp_t gfp, > */ > void zpool_destroy_pool(struct zpool *zpool) > { > + if (unlikely(!zpool)) > + return; > + > pr_info("destroying pool type %s\n", zpool->type); > > spin_lock(&pools_lock); > -- > 2.4.3.368.g7974889 > > -- > To unsubscribe, send a message with 'unsubscribe linux-mm' in > the body to majordomo@xxxxxxxxx. For more info on Linux MM, > see: http://www.linux-mm.org/ . > Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a> -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>