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| author |   Nicolas Iooss <nicolas.iooss_linux@m4x.org> | 2015-07-17 16:23:42 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2015-07-17 16:39:53 -0700 |
| commit | 8db1486065141e619e4855b84e350ef32064f7e1 (patch) | |
| tree | 438cace62ece1251656b38fbf428cf5aa5184fb8 /include/linux/kobject.h | |
| parent | s390/hugetlb: add hugepages_supported define (diff) | |
| download | linux-dev-8db1486065141e619e4855b84e350ef32064f7e1.tar.xz linux-dev-8db1486065141e619e4855b84e350ef32064f7e1.zip | |
include, lib: add __printf attributes to several function prototypes
Using __printf attributes helps to detect several format string issues
at compile time (even though -Wformat-security is currently disabled in
Makefile). For example it can detect when formatting a pointer as a
number, like the issue fixed in commit a3fa71c40f18 ("wl18xx: show
rx_frames_per_rates as an array as it really is"), or when the arguments
do not match the format string, c.f. for example commit 5ce1aca81435
("reiserfs: fix __RASSERT format string").
To prevent similar bugs in the future, add a __printf attribute to every
function prototype which needs one in include/linux/ and lib/. These
functions were mostly found by using gcc's -Wsuggest-attribute=format
flag.
Signed-off-by: Nicolas Iooss <nicolas.iooss_linux@m4x.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/kobject.h')
| -rw-r--r-- | include/linux/kobject.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/include/linux/kobject.h b/include/linux/kobject.h index 2d61b909f414..637f67002c5a 100644 --- a/include/linux/kobject.h +++ b/include/linux/kobject.h @@ -80,8 +80,9 @@ struct kobject { extern __printf(2, 3) int kobject_set_name(struct kobject *kobj, const char *name, ...); -extern int kobject_set_name_vargs(struct kobject *kobj, const char *fmt, - va_list vargs); +extern __printf(2, 0) +int kobject_set_name_vargs(struct kobject *kobj, const char *fmt, + va_list vargs); static inline const char *kobject_name(const struct kobject *kobj) { |