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authorNicolas Iooss <nicolas.iooss_linux@m4x.org>2015-07-17 16:23:42 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-07-17 16:39:53 -0700
commit8db1486065141e619e4855b84e350ef32064f7e1 (patch)
tree438cace62ece1251656b38fbf428cf5aa5184fb8 /lib/kobject.c
parent7f9be77555bb2e52de84e9dddf7b4eb20cc6e171 (diff)
downloadlinux-linaro-stable-8db1486065141e619e4855b84e350ef32064f7e1.tar.gz
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 'lib/kobject.c')
-rw-r--r--lib/kobject.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/lib/kobject.c b/lib/kobject.c
index 2e3bd01964a9..3e3a5c3cb330 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -337,8 +337,9 @@ error:
}
EXPORT_SYMBOL(kobject_init);
-static int kobject_add_varg(struct kobject *kobj, struct kobject *parent,
- const char *fmt, va_list vargs)
+static __printf(3, 0) int kobject_add_varg(struct kobject *kobj,
+ struct kobject *parent,
+ const char *fmt, va_list vargs)
{
int retval;