[media] zr364xx: enforce minimum size when reading header
This code copies actual_length-128 bytes from the header, which will underflow if the received buffer is too small. Signed-off-by: Alyssa Milburn <amilburn@zall.org> Cc: stable@vger.kernel.org Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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