net/packet: fix overflow in check for tp_frame_nr

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[ Upstream commit 8f8d28e4d6 ]

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Andrey Konovalov 2017-03-29 16:11:21 +02:00 • committed by Greg Kroah-Hartman

parent 3ae0fc9506

commit 10452124ba

1 changed files with 2 additions and 0 deletions

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net/packet/af_packet.c

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