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(parent: 5d2ca2e) | 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)
commit5f9c55c8066bcd93ac25234a02585701fe2e31df
tree9cfd5b6e77e0bde6d275d7414fb0d321929b9cectree | snapshot
parent5d2ca2e12dfb2aff3388ca57b06f570fa6206cedcommit | 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
Domain: System / Kernel;