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(parent: 1a179f5) | patch
inet: fix IP(V6)_RECVORIGDSTADDR for udp sockets
authorWillem de Bruijn <willemb@google.com>
Thu, 22 Dec 2016 23:19:16 +0000 (18:19 -0500)
committerDavid S. Miller <davem@davemloft.net>
Fri, 23 Dec 2016 17:19:18 +0000 (12:19 -0500)
commit87878fbd3e38ef80598179af3393d0409c1940ee
treee95a7c908c2bb7140aa16cbbbf4fb74af41085edtree | snapshot
parent1a179f5d74b511a44d81c52d9cfdd307ec528d76commit | diff
inet: fix IP(V6)_RECVORIGDSTADDR for udp sockets

Socket cmsg IP(V6)_RECVORIGDSTADDR checks that port range lies within
the packet. For sockets that have transport headers pulled, transport
offset can be negative. Use signed comparison to avoid overflow.

Fixes: f1b0743d94dc ("udp: remove headers from UDP packets before queueing")
Reported-by: Nisar Jagabar <njagabar@cloudmark.com>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/ipv4/ip_sockglue.c diff | blob | history
net/ipv6/datagram.c diff | blob | history
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