netdev - [PATCH v2 net-next 6/6] net sched actions: avoid bitwise operation on signed value in pedit

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Message-Id: <1530120815-13736-7-git-send-email-mrv@mojatatu.com>
Date:   Wed, 27 Jun 2018 13:33:35 -0400
From:   Roman Mashak <mrv@...atatu.com>
To:     davem@...emloft.net
Cc:     netdev@...r.kernel.org, kernel@...atatu.com, jhs@...atatu.com,
        xiyou.wangcong@...il.com, jiri@...nulli.us,
        Roman Mashak <mrv@...atatu.com>
Subject: [PATCH v2 net-next 6/6] net sched actions: avoid bitwise operation on signed value in pedit

Since char can be unsigned or signed, and bitwise operators may have
implementation-dependent results when performed on signed operands,
declare 'u8 *' operand instead.

Suggested-by: Davide Caratti <dcaratti@...hat.com>
Signed-off-by: Roman Mashak <mrv@...atatu.com>
---
 net/sched/act_pedit.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/sched/act_pedit.c b/net/sched/act_pedit.c
index caa6927a992c..ab151346d3d4 100644
--- a/net/sched/act_pedit.c
+++ b/net/sched/act_pedit.c
@@ -311,7 +311,7 @@ static int tcf_pedit(struct sk_buff *skb, const struct tc_action *a,
 			}
 
 			if (tkey->offmask) {
-				char *d, _d;
+				u8 *d, _d;
 
 				if (!offset_valid(skb, hoffset + tkey->at)) {
 					pr_info("tc action pedit 'at' offset %d out of bounds\n",
-- 
2.7.4