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authorKees Cook <keescook@chromium.org>2013-07-03 15:04:56 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-03 16:07:41 -0700
commit02aa2a37636c8fa4fb9322d91be46ff8225b7de0 (patch)
tree97c93d17cfcad186d229ef76f96de709eddfea8c /mm
parent096a8aac6bf4a5a0b2ef812ad76d056bbf3fb2af (diff)
downloadop-kernel-dev-02aa2a37636c8fa4fb9322d91be46ff8225b7de0.zip
op-kernel-dev-02aa2a37636c8fa4fb9322d91be46ff8225b7de0.tar.gz
drivers: avoid format string in dev_set_name
Calling dev_set_name with a single paramter causes it to be handled as a format string. Many callers are passing potentially dynamic string content, so use "%s" in those cases to avoid any potential accidents, including wrappers like device_create*() and bdi_register(). Signed-off-by: Kees Cook <keescook@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/backing-dev.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c
index 5025174..d014ee5 100644
--- a/mm/backing-dev.c
+++ b/mm/backing-dev.c
@@ -515,7 +515,6 @@ EXPORT_SYMBOL(bdi_destroy);
int bdi_setup_and_register(struct backing_dev_info *bdi, char *name,
unsigned int cap)
{
- char tmp[32];
int err;
bdi->name = name;
@@ -524,8 +523,8 @@ int bdi_setup_and_register(struct backing_dev_info *bdi, char *name,
if (err)
return err;
- sprintf(tmp, "%.28s%s", name, "-%d");
- err = bdi_register(bdi, NULL, tmp, atomic_long_inc_return(&bdi_seq));
+ err = bdi_register(bdi, NULL, "%.28s-%ld", name,
+ atomic_long_inc_return(&bdi_seq));
if (err) {
bdi_destroy(bdi);
return err;
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