linux-kernel - [PATCH] kcm: fix variable type

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Date:	Fri, 11 Mar 2016 07:51:15 +0100
From:	Andrzej Hajda <a.hajda@...sung.com>
To:	Tom Herbert <tom@...bertland.com>
Cc:	Andrzej Hajda <a.hajda@...sung.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	"David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH] kcm: fix variable type

Function skb_splice_bits can return negative values, its result should
be assigned to signed variable to allow correct error checking.

The problem has been detected using patch
scripts/coccinelle/tests/unsigned_lesser_than_zero.cocci.

Signed-off-by: Andrzej Hajda <a.hajda@...sung.com>
---
 net/kcm/kcmsock.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/kcm/kcmsock.c b/net/kcm/kcmsock.c
index 40662d73..0b68ba7 100644
--- a/net/kcm/kcmsock.c
+++ b/net/kcm/kcmsock.c
@@ -1483,7 +1483,7 @@ static ssize_t kcm_splice_read(struct socket *sock, loff_t *ppos,
 	long timeo;
 	struct kcm_rx_msg *rxm;
 	int err = 0;
-	size_t copied;
+	ssize_t copied;
 	struct sk_buff *skb;
 
 	/* Only support splice for SOCKSEQPACKET */
-- 
1.9.1