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| author | Kees Cook <keescook@chromium.org> | 2013-07-03 15:04:56 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-03 16:07:41 -0700 |
| commit | 02aa2a37636c8fa4fb9322d91be46ff8225b7de0 (patch) | |
| tree | 97c93d17cfcad186d229ef76f96de709eddfea8c /mm/backing-dev.c | |
| parent | 096a8aac6bf4a5a0b2ef812ad76d056bbf3fb2af (diff) | |
| download | lwn-02aa2a37636c8fa4fb9322d91be46ff8225b7de0.tar.gz lwn-02aa2a37636c8fa4fb9322d91be46ff8225b7de0.zip | |
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/backing-dev.c')
| -rw-r--r-- | mm/backing-dev.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/mm/backing-dev.c b/mm/backing-dev.c index 502517492258..d014ee5fcbbd 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; |