avcodec/pngdec: Only allow one IHDR chunk

avcodec/pngdec: Only allow one IHDR chunk

Multiple IHDR chunks are forbidden in PNG
Fixes inconsistency and out of array accesses

Fixes: asan_heap-oob_4d5c5a_1738_cov_2638287726_c-m2-8f2b481b7fd9bd745e620b7c01a18df2.png
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Gbp-Pq: Name CVE-2015-6818.patch

avcodec/pngdec: Check IHDR/IDAT order

avcodec/pngdec: Check IHDR/IDAT order

Fixes out of array access
Fixes: asan_heap-oob_20a6c26_2690_cov_3434532168_mail.png
Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
[sunweaver] - Port this commit to libav in Debian jessie.

Gbp-Pq: Name CVE-2014-9317.patch

avcodec/vp8: Do not use num_coeff_partitions in thread/buffer setup

avcodec/vp8: Do not use num_coeff_partitions in thread/buffer setup

The variable is not a constant and can lead to race conditions

Fixes: repro.webm (not reproducable with FFmpeg alone)
Found-by: Dale Curtis <dalecurtis@google.com>
Tested-by: Dale Curtis <dalecurtis@google.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Gbp-Pq: Name CVE-2015-6761.patch

disable-configuration-warnings

Gbp-Pq: Name 03-disable-configuration-warnings.patch

configure-disable-ebx-gcc-4.9

Gbp-Pq: Name 02-configure-disable-ebx-gcc-4.9.patch

libav (6:11.12-1~deb8u8) jessie-security; urgency=medium

  * CVE-2019-14442: avformat/mpc8: fix hang with fuzzed file.
  * CVE-2018-5766: lavc/avpacket: Fix undefined behaviour, do not pass a null
    pointer to memcpy().
  * CVE-2019-14372: wvdec: check for eof in wv_read_block_header().
  * CVE-2017-9987: avcodec/mpegvideo_motion: Fix off by 1 error in MV bounds
    checking.
  * CVE-2018-11102:
    - mov_probe: fix integer overflows.
    - mov.c: Check for stsd + m1s tag indicating MOV-wrapped MPEG-PS, and force
      continued probing if found.

[dgit import unpatched libav 6:11.12-1~deb8u8]

Import libav_11.12-1~deb8u8.debian.tar.xz

[dgit import tarball libav 6:11.12-1~deb8u8 libav_11.12-1~deb8u8.debian.tar.xz]

Import libav_11.12.orig.tar.xz

[dgit import orig libav_11.12.orig.tar.xz]