From: Pavel Machek <pavel@suse.cz>
To: rpurdie@rpsys.net, kernel list <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@osdl.org>
Subject: backlight: catch invalid input
Date: Fri, 21 Nov 2008 12:14:14 +0100 [thread overview]
Message-ID: <20081121111414.GA1455@elf.ucw.cz> (raw)
Currently, echo > brightness turns brightness to zero due to
insufficient checking. Add a test to catch that.
Signed-off-by: Pavel Machek <pavel@suse.cz>
diff --git a/drivers/video/backlight/backlight.c b/drivers/video/backlight/backlight.c
index fab0bc8..5c2e23d 100644
--- a/drivers/video/backlight/backlight.c
+++ b/drivers/video/backlight/backlight.c
@@ -86,6 +86,8 @@ static ssize_t backlight_store_power(str
int power = simple_strtoul(buf, &endp, 0);
size_t size = endp - buf;
+ if (!size)
+ return -EINVAL;
if (*endp && isspace(*endp))
size++;
if (size != count)
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
next reply other threads:[~2008-11-21 19:14 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-11-21 11:14 Pavel Machek [this message]
2008-11-21 23:54 ` Andrew Morton
2008-11-22 10:37 ` Pavel Machek
2008-11-22 20:31 ` Pavel Machek
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