From d9739a26fbcaa11c026dd79bc310af96003f20d8 Mon Sep 17 00:00:00 2001 From: Dan Carpenter Date: Tue, 10 May 2016 22:21:17 +0300 Subject: [PATCH] atmel: potential underflow in atmel_set_freq() Smatch complains that we cap the upper bound of "fwrq->m" but not the lower bound. I don't know if it can actually happen but it's simple enough to check for negatives. Signed-off-by: Dan Carpenter Signed-off-by: Kalle Valo --- drivers/net/wireless/atmel/atmel.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/net/wireless/atmel/atmel.c b/drivers/net/wireless/atmel/atmel.c index 8f8f37f3a00c..bf2e9a083c0c 100644 --- a/drivers/net/wireless/atmel/atmel.c +++ b/drivers/net/wireless/atmel/atmel.c @@ -2275,7 +2275,7 @@ static int atmel_set_freq(struct net_device *dev, fwrq->m = ieee80211_frequency_to_channel(f); } /* Setting by channel number */ - if ((fwrq->m > 1000) || (fwrq->e > 0)) + if (fwrq->m < 0 || fwrq->m > 1000 || fwrq->e > 0) rc = -EOPNOTSUPP; else { int channel = fwrq->m; -- 2.30.2