Andrey Konovalov 21bbc6bb2b net/packet: fix overflow in check for tp_frame_nr ...

[ Upstream commit 8f8d28e4d6d815a391285e121c3a53a0b6cb9e7b ]

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.

Change-Id: I8ee0beeb0a9390d92b39f9765b55b5753f4ad2da
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>
CVE-2017-7308
Signed-off-by: Kevin F. Haggerty <haggertk@lineageos.org>

2019-08-06 12:26:36 +02:00

..

af_packet.c

net/packet: fix overflow in check for tp_frame_nr

2019-08-06 12:26:36 +02:00

Kconfig

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Makefile

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