zmbvdec: Check the buffer size for uncompressed data

Also don't pointlessly set the buffer size to 1 after copying
one packet.

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
(cherry picked from commit 0d61f260010707f3028b818e8b24598e1a83d696)
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
mpc8: Check the seek table size parsed from the bitstream

Limit the size to INT_MAX/2 (for simplicity) to be sure that
size + FF_INPUT_BUFFER_PADDING_SIZE won't overflow.

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
(cherry picked from commit 459f2b393a3f89ed08d10fbceb4738d1429f268e)
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
(cherry picked from commit f8a72f041c049e812dfa1f32156327e9778f5710)
mpc8: Make sure the first stream exists before parsing the seek table

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
(cherry picked from commit 17d57848fc14e82f76a65ffb25c90f2f011dc4a0)
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
(cherry picked from commit 557df77eab7d3726c34221aeb999afe9e7818d52)
omadec: Properly check lengths before incrementing the position

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
(cherry picked from commit 342c43d154e586bc022c86b168fe8d36f69da9d3)
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
(cherry picked from commit 9eba02d5dd7036294ea350cb772822deec95b867)
sierravmd: Do sanity checking of frame sizes

Limit the size to INT_MAX/2 (for simplicity) to be sure that
size + BYTES_PER_FRAME_RECORD won't overflow.

Also factorize other existing error return paths.

Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Signed-off-by: Martin Storsjö <martin@martin.st>
(cherry picked from commit 0ef1660a6365ce60ead8858936b6f3f8ea862826)
Signed-off-by: Luca Barbato <lu_zero@gentoo.org>
(cherry picked from commit 153deed18bed43d16b272e8681b2a9b988d2682a)