packet: validate address length if non-zero
authorWillem de Bruijn <willemb@google.com>
Sat, 22 Dec 2018 21:53:45 +0000 (16:53 -0500)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 9 Jan 2019 16:14:44 +0000 (17:14 +0100)
commit41783853bd1a62045c2474a3ab9f1682d5e470d8
tree267a221552d4876b49aa08be81cc1003a59998ee
parent9eee85ed843fbec123e39a330495cfc4ca2b871f
packet: validate address length if non-zero

[ Upstream commit 6b8d95f1795c42161dc0984b6863e95d6acf24ed ]

Validate packet socket address length if a length is given. Zero
length is equivalent to not setting an address.

Fixes: 99137b7888f4 ("packet: validate address length")
Reported-by: Ido Schimmel <idosch@idosch.org>
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
net/packet/af_packet.c