linux-kernel - [PATCH] [net/ipv6] remove redundant null check in frag

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-Id: <20200625024207.1625-1-gaurav1086@gmail.com>
Date:   Wed, 24 Jun 2020 22:42:05 -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 frag_mt6

fh cannot be NULL since its already checked above after
assignment and is being dereferenced before. Remove the
redundant null check.

Signed-off-by: Gaurav Singh <gaurav1086@...il.com>
---
 net/ipv6/netfilter/ip6t_frag.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/ipv6/netfilter/ip6t_frag.c b/net/ipv6/netfilter/ip6t_frag.c
index fb91eeee4a1e..3aad6439386b 100644
--- a/net/ipv6/netfilter/ip6t_frag.c
+++ b/net/ipv6/netfilter/ip6t_frag.c
@@ -85,8 +85,7 @@ frag_mt6(const struct sk_buff *skb, struct xt_action_param *par)
 		 !((fraginfo->flags & IP6T_FRAG_NMF) &&
 		   (ntohs(fh->frag_off) & IP6_MF)));
 
-	return (fh != NULL) &&
-		id_match(fraginfo->ids[0], fraginfo->ids[1],
+	return id_match(fraginfo->ids[0], fraginfo->ids[1],
 			 ntohl(fh->identification),
 			 !!(fraginfo->invflags & IP6T_FRAG_INV_IDS)) &&
 		!((fraginfo->flags & IP6T_FRAG_RES) &&
-- 
2.17.1