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authorKees Cook <keescook@chromium.org>2014-08-29 15:18:40 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-29 16:28:16 -0700
commit137f8cff505ace6251dc442c7aa973d60c801a79 (patch)
tree409dde7317a635efd036ce5d3029585988bd9000 /mm/zpool.c
parent0cf1e9d6c34d4c82ac3af8015594849814843d36 (diff)
downloadlinux-137f8cff505ace6251dc442c7aa973d60c801a79.tar.bz2
mm/zpool: use prefixed module loading
To avoid potential format string expansion via module parameters, do not use the zpool type directly in request_module() without a format string. Additionally, to avoid arbitrary modules being loaded via zpool API (e.g. via the zswap_zpool_type module parameter) add a "zpool-" prefix to the requested module, as well as module aliases for the existing zpool types (zbud and zsmalloc). Signed-off-by: Kees Cook <keescook@chromium.org> Cc: Seth Jennings <sjennings@variantweb.net> Cc: Minchan Kim <minchan@kernel.org> Cc: Nitin Gupta <ngupta@vflare.org> Acked-by: Dan Streetman <ddstreet@ieee.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/zpool.c')
-rw-r--r--mm/zpool.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/zpool.c b/mm/zpool.c
index e40612a1df00..739cdf0d183a 100644
--- a/mm/zpool.c
+++ b/mm/zpool.c
@@ -150,7 +150,7 @@ struct zpool *zpool_create_pool(char *type, gfp_t gfp, struct zpool_ops *ops)
driver = zpool_get_driver(type);
if (!driver) {
- request_module(type);
+ request_module("zpool-%s", type);
driver = zpool_get_driver(type);
}