linux-kernel - [PATCH] [net/ipv6] Remove redundant null check in ah

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Message-Id: <20200625023626.32557-1-gaurav1086@gmail.com>
Date:   Wed, 24 Jun 2020 22:36:25 -0400
From:   Gaurav Singh <gaurav1086@...il.com>
To:     gaurav1086@...il.com, Pablo Neira Ayuso <pablo@...filter.org>,
        Jozsef Kadlecsik <kadlec@...filter.org>,
        Florian Westphal <fw@...len.de>,
        "David S. Miller" <davem@...emloft.net>,
        Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        Jakub Kicinski <kuba@...nel.org>,
        netfilter-devel@...r.kernel.org (open list:NETFILTER),
        coreteam@...filter.org (open list:NETFILTER),
        netdev@...r.kernel.org (open list:NETWORKING [IPv4/IPv6]),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH] [net/ipv6] Remove redundant null check in ah_mt6

ah cannot be NULL since its already checked above after
assignment and is being dereferenced before in pr().
Remove the redundant null check.

Signed-off-by: Gaurav Singh <gaurav1086@...il.com>
---
 net/ipv6/netfilter/ip6t_ah.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/ipv6/netfilter/ip6t_ah.c b/net/ipv6/netfilter/ip6t_ah.c
index 4e15a14435e4..70da2f2ce064 100644
--- a/net/ipv6/netfilter/ip6t_ah.c
+++ b/net/ipv6/netfilter/ip6t_ah.c
@@ -74,8 +74,7 @@ static bool ah_mt6(const struct sk_buff *skb, struct xt_action_param *par)
 		 ahinfo->hdrres, ah->reserved,
 		 !(ahinfo->hdrres && ah->reserved));
 
-	return (ah != NULL) &&
-		spi_match(ahinfo->spis[0], ahinfo->spis[1],
+	return spi_match(ahinfo->spis[0], ahinfo->spis[1],
 			  ntohl(ah->spi),
 			  !!(ahinfo->invflags & IP6T_AH_INV_SPI)) &&
 		(!ahinfo->hdrlen ||
-- 
2.17.1