[PATCH] netfilter: ip6tables: Remove redundant null checks

[Gaurav Singh]

netfilter: ip6tables: Remove redundant null checks

Signed-off-by: Gaurav Singh <gaurav1...@gmail.com>
---
 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) ||
-- 
2.17.1