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From: Pablo Neira Ayuso <pablo@netfilter.org>
To: netfilter-devel@vger.kernel.org
Cc: davem@davemloft.net, netdev@vger.kernel.org
Subject: [PATCH 5/7] netfilter: ip6tables: Remove redundant null checks
Date: Sun,  2 Aug 2020 20:31:46 +0200
Message-ID: <20200802183149.2808-6-pablo@netfilter.org> (raw)
In-Reply-To: <20200802183149.2808-1-pablo@netfilter.org>

From: Gaurav Singh <gaurav1086@gmail.com>

Remove superfluous check for NULL pointer to header.

Signed-off-by: Gaurav Singh <gaurav1086@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
---
 net/ipv6/netfilter/ip6t_ah.c   | 3 +--
 net/ipv6/netfilter/ip6t_frag.c | 3 +--
 net/ipv6/netfilter/ip6t_hbh.c  | 3 +--
 net/ipv6/netfilter/ip6t_rt.c   | 3 +--
 4 files changed, 4 insertions(+), 8 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 ||
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) &&
diff --git a/net/ipv6/netfilter/ip6t_hbh.c b/net/ipv6/netfilter/ip6t_hbh.c
index 467b2a86031b..e7a3fb9355ee 100644
--- a/net/ipv6/netfilter/ip6t_hbh.c
+++ b/net/ipv6/netfilter/ip6t_hbh.c
@@ -86,8 +86,7 @@ hbh_mt6(const struct sk_buff *skb, struct xt_action_param *par)
 		  ((optinfo->hdrlen == hdrlen) ^
 		   !!(optinfo->invflags & IP6T_OPTS_INV_LEN))));
 
-	ret = (oh != NULL) &&
-	      (!(optinfo->flags & IP6T_OPTS_LEN) ||
+	ret = (!(optinfo->flags & IP6T_OPTS_LEN) ||
 	       ((optinfo->hdrlen == hdrlen) ^
 		!!(optinfo->invflags & IP6T_OPTS_INV_LEN)));
 
diff --git a/net/ipv6/netfilter/ip6t_rt.c b/net/ipv6/netfilter/ip6t_rt.c
index f633dc84ca3f..733c83d38b30 100644
--- a/net/ipv6/netfilter/ip6t_rt.c
+++ b/net/ipv6/netfilter/ip6t_rt.c
@@ -89,8 +89,7 @@ static bool rt_mt6(const struct sk_buff *skb, struct xt_action_param *par)
 		 !((rtinfo->flags & IP6T_RT_RES) &&
 		   (((const struct rt0_hdr *)rh)->reserved)));
 
-	ret = (rh != NULL) &&
-	      (segsleft_match(rtinfo->segsleft[0], rtinfo->segsleft[1],
+	ret = (segsleft_match(rtinfo->segsleft[0], rtinfo->segsleft[1],
 			      rh->segments_left,
 			      !!(rtinfo->invflags & IP6T_RT_INV_SGS))) &&
 	      (!(rtinfo->flags & IP6T_RT_LEN) ||
-- 
2.20.1


  parent reply index

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-02 18:31 [PATCH 0/7] Netfilter updates for net-next Pablo Neira Ayuso
2020-08-02 18:31 ` [PATCH 1/7] netfilter: nf_tables: Fix a use after free in nft_immediate_destroy() Pablo Neira Ayuso
2020-08-02 18:31 ` [PATCH 2/7] ipvs: queue delayed work to expire no destination connections if expire_nodest_conn=1 Pablo Neira Ayuso
2020-08-02 18:31 ` [PATCH 3/7] netfilter: Use fallthrough pseudo-keyword Pablo Neira Ayuso
2020-08-02 18:31 ` [PATCH 4/7] netfilter: Replace HTTP links with HTTPS ones Pablo Neira Ayuso
2020-08-02 18:31 ` Pablo Neira Ayuso [this message]
2020-08-02 18:31 ` [PATCH 6/7] netfilter: nf_tables: extended netlink error reporting for expressions Pablo Neira Ayuso
2020-08-02 18:31 ` [PATCH 7/7] netfilter: nf_tables: report EEXIST on overlaps Pablo Neira Ayuso
2020-08-03 23:03 ` [PATCH 0/7] Netfilter updates for net-next David Miller

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