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(parent: 2b6867c) | 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)
commit8f8d28e4d6d815a391285e121c3a53a0b6cb9e7b
tree624d40509e1e573450288151977e59c36da05fc6tree
parent2b6867c2ce76c596676bec7d2d525af525fdc6e2commit | 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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