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ipv6: exthdrs: recompute network header pointer once

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In ip6_parse_tlv(), recompute the network header pointer once regardless
of the option processed (Hbh or Dest), as missing recomputation for
specific options has caused issues in the past.

Signed-off-by: Justin Iurman <justin.iurman@gmail.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Link: https://patch.msgid.link/20260602213033.12244-1-justin.iurman@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Justin Iurman 2026-06-02 23:30:33 +02:00 committed by Jakub Kicinski
parent 1681cb1bde
commit ee5aee77bc
1 changed files with 3 additions and 6 deletions
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9
net/ipv6/exthdrs.c
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@ -178,14 +178,10 @@ static bool ip6_parse_tlv(bool hopbyhop,
case IPV6_TLV_IOAM:
if (!ipv6_hop_ioam(skb, off))
return false;
nh = skb_network_header(skb);
break;
case IPV6_TLV_JUMBO:
if (!ipv6_hop_jumbo(skb, off))
return false;
nh = skb_network_header(skb);
break;
case IPV6_TLV_CALIPSO:
if (!ipv6_hop_calipso(skb, off))
@ -203,8 +199,6 @@ static bool ip6_parse_tlv(bool hopbyhop,
case IPV6_TLV_HAO:
if (!ipv6_dest_hao(skb, off))
return false;
nh = skb_network_header(skb);
break;
#endif
default:
@ -215,6 +209,9 @@ static bool ip6_parse_tlv(bool hopbyhop,
}
}
padlen = 0;
/* recompute the network header pointer in case it has changed */
nh = skb_network_header(skb);
}
off += optlen;
len -= optlen;