From: Arnaud Patard (Rtp) <arnaud.patard@rtp-net.org>
Date: Mon, 23 Aug 2010 21:02:22 +0000 (+0200)
Subject: rt2x00: fix "buffer size not provably correct" build warning
X-Git-Tag: upstream/snapshot3+hdmi~12689^2~265^2^2~218
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f8d8b7a13d3d61f99bf3dc5c9650f87f9818d7a7;p=platform%2Fadaptation%2Frenesas_rcar%2Frenesas_kernel.git

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 @@ static ssize_t rt2x00debug_write_##__name(struct file *file,	\
 	if (index >= debug->__name.word_count)			\
 		return -EINVAL;					\
 								\
+	if (length > sizeof(line))				\
+		return -EINVAL;					\
+								\
 	if (copy_from_user(line, buf, length))			\
 		return -EFAULT;					\
 								\