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(parent: ff9a12a) | patch
net/packet: fix overflow in check for tp_frame_nr
authorAndrey Konovalov <andreyknvl@google.com>
Wed, 29 Mar 2017 14:11:21 +0000 (16:11 +0200)
committerDavid S. Miller <davem@davemloft.net>
Thu, 30 Mar 2017 18:03:59 +0000 (11:03 -0700)
commit6cc4d79bd577d6e54713597fa1838ac951ba1bb4
tree624d40509e1e573450288151977e59c36da05fc6tree | snapshot
parentff9a12a3df9464face358185d45cf678e08eea03commit | diff
net/packet: fix overflow in check for tp_frame_nr

When calculating rb->frames_per_block * req->tp_block_nr the result
can overflow.

Add a check that tp_block_size * tp_block_nr <= UINT_MAX.

Since frames_per_block <= tp_block_size, the expression would
never overflow.

Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
net/packet/af_packet.c diff | blob | history
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