rt2x00: fix "buffer size not provably correct" build warning
rt2x00 debugfs interface doesn't check the size of the data coming
from userspace, leading to a build warning. Fix That.
v2: return EINVAL if input is too long
Signed-off-by: Arnaud Patard <arnaud.patard@rtp-net.org>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/rt2x00/rt2x00debug.c b/drivers/net/wireless/rt2x00/rt2x00debug.c
index 74f0d67..daf7f95 100644
--- a/drivers/net/wireless/rt2x00/rt2x00debug.c
+++ b/drivers/net/wireless/rt2x00/rt2x00debug.c
@@ -480,6 +480,9 @@
if (index >= debug->__name.word_count) \
return -EINVAL; \
\
+ if (length > sizeof(line)) \
+ return -EINVAL; \
+ \
if (copy_from_user(line, buf, length)) \
return -EFAULT; \
\