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6 Commits

Author SHA1 Message Date
Michael Niedermayer
e90f0ac334 avcodec/ilbcdec: Check startindex 
Fixes: Out of array read
Fixes: 10789/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ILBC_fuzzer-5153255445757952

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2018-10-23 00:51:55 +02:00
Michael Niedermayer
d7dbad12f8 avcodec/ilbcdec: Fix multiple integer overflows 
Fixes: 10651/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ILBC_fuzzer-5202341540659200
Fixes: signed integer overflow: -1707705920 - 1703592888 cannot be represented in type 'int'

This tries to follow the webrtc code. For example using cliping and 64 bit as in WebRtcSpl_DotProductWithScale()
and not doing so in other places.
I could not find anything in rfc3951 and the reference code inside which would
explain what to do in these corner cases.

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2018-10-18 02:28:54 +02:00
Michael Niedermayer
d017886657 avcodec/ilbcdec: Fix multiple invalid left shifts 
Fixes: 10651/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ILBC_fuzzer-5202341540659200
Fixes: left shift of negative value -512

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2018-10-18 02:28:54 +02:00
Michael Niedermayer
25eb10d941 avcodec/ilbcdec: Limit indexes in create_augmented_vector() 
These limits are based on limiting done in WebRtcIlbcfix_CreateAugmentedVec()
Fixes: out of array accesses
Fixes: 10652/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ILBC_fuzzer-5638941487661056
Fixes: 10655/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ILBC_fuzzer-5699970020147200

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
 2018-10-18 02:28:54 +02:00
Paul B Mahol
8d29930767 avcodec/ilbcdec: fix typo, fixes CID 1439653 2018-09-24 09:20:31 +02:00
Paul B Mahol
009597ca33 avcodec: add native iLBC decoder 
Signed-off-by: Paul B Mahol <onemda@gmail.com>
 2018-09-23 15:25:50 +02:00