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From: Kuniyuki Iwashima <kuniyu@amazon.com>
To: "David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
	David Ahern <dsahern@kernel.org>
Cc: Kuniyuki Iwashima <kuniyu@amazon.com>,
	Kuniyuki Iwashima <kuni1840@gmail.com>, <netdev@vger.kernel.org>
Subject: [PATCH v1 net-next 3/5] ipv6: exthdrs: Replace pskb_pull() with skb_pull() in ipv6_srh_rcv().
Date: Wed, 14 Jun 2023 16:01:05 -0700	[thread overview]
Message-ID: <20230614230107.22301-4-kuniyu@amazon.com> (raw)
In-Reply-To: <20230614230107.22301-1-kuniyu@amazon.com>

ipv6_rthdr_rcv() pulls these data

  - Segment Routing Header : 8
  - Hdr Ext Len            : skb_transport_header(skb)[1] << 3

needed by ipv6_srh_rcv(), so pskb_pull() in ipv6_srh_rcv() never
fails and can be replaced with skb_pull().

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
---
 net/ipv6/exthdrs.c | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/net/ipv6/exthdrs.c b/net/ipv6/exthdrs.c
index 6259e907f0d9..e62e26ac99ef 100644
--- a/net/ipv6/exthdrs.c
+++ b/net/ipv6/exthdrs.c
@@ -402,11 +402,7 @@ static int ipv6_srh_rcv(struct sk_buff *skb)
 
 			skb_postpull_rcsum(skb, skb_network_header(skb),
 					   skb_network_header_len(skb));
-
-			if (!pskb_pull(skb, offset)) {
-				kfree_skb(skb);
-				return -1;
-			}
+			skb_pull(skb, offset);
 			skb_postpull_rcsum(skb, skb_transport_header(skb),
 					   offset);
 
-- 
2.30.2


  parent reply	other threads:[~2023-06-14 23:02 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-06-14 23:01 [PATCH v1 net-next 0/5] ipv6: Random cleanup for Extension Header Kuniyuki Iwashima
2023-06-14 23:01 ` [PATCH v1 net-next 1/5] ipv6: rpl: Remove pskb(_may)?_pull() in ipv6_rpl_srh_rcv() Kuniyuki Iwashima
2023-06-17  8:00   ` Jakub Kicinski
2023-06-19 16:02     ` Kuniyuki Iwashima
2023-06-14 23:01 ` [PATCH v1 net-next 2/5] ipv6: rpl: Remove redundant multicast tests " Kuniyuki Iwashima
2023-06-14 23:01 ` Kuniyuki Iwashima [this message]
2023-06-14 23:01 ` [PATCH v1 net-next 4/5] ipv6: exthdrs: Reload hdr only when needed in ipv6_srh_rcv() Kuniyuki Iwashima
2023-06-14 23:01 ` [PATCH v1 net-next 5/5] ipv6: exthdrs: Remove redundant skb_headlen() check in ip6_parse_tlv() Kuniyuki Iwashima
2023-06-19 19:10 ` [PATCH v1 net-next 0/5] ipv6: Random cleanup for Extension Header patchwork-bot+netdevbpf

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