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6 commits

Author SHA1 Message Date
Michael Niedermayer
7e899776ec
avcodec/jpeg2000htdec: warn about non zero roi shift 
Suggested-by: Tomas Härdin <git@haerdin.se>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 7b7eea8e63)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2024-04-03 14:42:09 +02:00
Pierre-Anthony Lemieux
a1384b4e86
avcodec/jpeg2000htdec: check if block decoding will exceed internal precision 
Intended to replace https://patchwork.ffmpeg.org/project/ffmpeg/patch/20230802000135.26482-3-michael@niedermayer.cc/
with a more accurate block decoding magnitude bound.

Fixes: 62433/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_fuzzer-5828618092937216
Fixes: 58299/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_fuzzer-5828618092937216
Previous-version-reviewed-by: Tomas Härdin <git@haerdin.se>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2023-12-14 23:53:10 +01:00
Michael Niedermayer
9549712056
avcodec/jpeg2000htdec: Consolidate jpeg2000 spec bits in jpeg2000_bitbuf_refill_backwards() 
Code should make more sense now

Fixes: out of array access
Fixes: 58299/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_fuzzer-6627570448465920

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Pierre-Anthony Lemieux <pal@sandflow.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2023-08-05 19:52:00 +02:00
Michael Niedermayer
044ab532fc
avcodec/jpeg2000htdec: Avoid freeing uninitialized pointers in ff_jpeg2000_decode_htj2k() 
Fixes: freeing of uninitialized pointers
Fixes: part of 58299

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Tomas Härdin <git@haerdin.se>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2023-08-04 00:06:26 +02:00
caleb
043a9d09cb
avcodec/jpeg2000htdec: Check for invalid magref length. 
Fixes: shift exponent -8 is negative
Fixes: 58328/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_JPEG2000_fuzzer-6007789196804096

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2023-06-23 02:06:45 +02:00
caleb
b9c42cdf8d
avcodec/jpeg2000dec: add support for HTJ2K block decoding 
Signed-off-by: Pierre-Anthony Lemieux <pal@palemieux.com>
 2023-04-22 15:57:40 -07:00