ipv6: Check ip6_find_1stfragopt() return value properly.
authorDavid S. Miller <davem@davemloft.net>
Thu, 18 May 2017 02:54:11 +0000 (22:54 -0400)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 7 Jun 2017 10:05:58 +0000 (12:05 +0200)
commitf76d54a8882ed61d4686707fff58a84a1664860c
treedad16ce2bb3a22a8533804bf896a34ca30d7cd9e
parent017fabead5c2aacb36df910bbfbfb1e813517ae3
ipv6: Check ip6_find_1stfragopt() return value properly.

[ Upstream commit 7dd7eb9513bd02184d45f000ab69d78cb1fa1531 ]

Do not use unsigned variables to see if it returns a negative
error or not.

Fixes: 2423496af35d ("ipv6: Prevent overrun when parsing v6 header options")
Reported-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
net/ipv6/ip6_offload.c
net/ipv6/ip6_output.c
net/ipv6/udp_offload.c