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Message-ID: <20081121111414.GA1455@elf.ucw.cz> Date: Fri, 21 Nov 2008 12:14:14 +0100 From: Pavel Machek <pavel@...e.cz> To: rpurdie@...ys.net, kernel list <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...l.org> Subject: backlight: catch invalid input Currently, echo > brightness turns brightness to zero due to insufficient checking. Add a test to catch that. Signed-off-by: Pavel Machek <pavel@...e.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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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