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net/packet: fix overflow in check for tp_reserve
authorAndrey Konovalov <andreyknvl@google.com>
Wed, 29 Mar 2017 14:11:22 +0000 (16:11 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 3 May 2017 15:36:35 +0000 (08:36 -0700)
commit1f49c8cd2c9a53ea04bd86bce01247415d12aa26
treee3d0a39967c24055f31a11de2682b37119dd80c8tree | snapshot
parent10452124bac39411e92fc8910dd418648bbb78accommit | diff
net/packet: fix overflow in check for tp_reserve

[ Upstream commit bcc5364bdcfe131e6379363f089e7b4108d35b70 ]

When calculating po->tp_hdrlen + po->tp_reserve the result can overflow.

Fix by checking that tp_reserve <= INT_MAX on assign.

Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Acked-by: Eric Dumazet <edumazet@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 diff | blob | history
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