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(parent: 1a5fb05) | patch
ipv6: check return value of ipv6_skip_exthdr
authorJordy Zomer <jordy@pwning.systems>
Wed, 17 Nov 2021 19:06:48 +0000 (20:06 +0100)
committerDavid S. Miller <davem@davemloft.net>
Thu, 18 Nov 2021 11:42:06 +0000 (11:42 +0000)
commite2980f7adaa98cafd8b2ea617ec98b7d4879cf72
tree9cfd5b6e77e0bde6d275d7414fb0d321929b9cectree | snapshot
parent1a5fb056c34e96c5e0e7d5ff5de39ffe054f4f72commit | diff
ipv6: check return value of ipv6_skip_exthdr

The offset value is used in pointer math on skb->data.
Since ipv6_skip_exthdr may return -1 the pointer to uh and th
may not point to the actual udp and tcp headers and potentially
overwrite other stuff. This is why I think this should be checked.

EDIT:  added {}'s, thanks Kees

Signed-off-by: Jordy Zomer <jordy@pwning.systems>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv6/esp6.c diff | blob | history
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