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ipv6: exthdrs: Remove redundant skb_headlen() check in ip6_parse_tlv().

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ipv6_destopt_rcv() and ipv6_parse_hopopts() pulls these data

  - Hop-by-Hop/Destination Options Header : 8
  - Hdr Ext Len                           : skb_transport_header(skb)[1] << 3

and calls ip6_parse_tlv(), so it need not check if skb_headlen() is less
than skb_transport_offset(skb) + (skb_transport_header(skb)[1] << 3).

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Kuniyuki Iwashima 2023-06-14 16:01:07 -07:00 committed by Jakub Kicinski
parent b83d50f431
commit 6db5dd2bf4
1 changed files with 0 additions and 3 deletions
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3
net/ipv6/exthdrs.c
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@ -126,9 +126,6 @@ static bool ip6_parse_tlv(bool hopbyhop,
max_count = -max_count;
}
if (skb_transport_offset(skb) + len > skb_headlen(skb))
goto bad;
off += 2;
len -= 2;