[FFmpeg-cvslog] avcodec/qdm2: Do not read out of array in fix_coding_method_array()
ffmpeg | branch: release/4.1 | Michael Niedermayer | Mon Jun 24 01:01:02 2019 +0200| [e5c21ed6e35e1efc89b583c793fd64b8b53f93e3] | committer: Michael Niedermayer avcodec/qdm2: Do not read out of array in fix_coding_method_array() Instead we ask for a sample, its unclear what to do in this case. Fixes: index 30 out of bounds for type 'int8_t [30][64]' Fixes: 15339/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_QDM2_fuzzer-5749441484554240 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer (cherry picked from commit ae021c1239ec3bc0a30dc5a4720569071599ece4) Signed-off-by: Michael Niedermayer > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=e5c21ed6e35e1efc89b583c793fd64b8b53f93e3 --- libavcodec/qdm2.c | 7 ++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/libavcodec/qdm2.c b/libavcodec/qdm2.c index 1397218bdd..44ff4fa6c6 100644 --- a/libavcodec/qdm2.c +++ b/libavcodec/qdm2.c @@ -408,7 +408,12 @@ static int fix_coding_method_array(int sb, int channels, } for (k = 0; k < run; k++) { if (j + k < 128) { -if (coding_method[ch][sb + (j + k) / 64][(j + k) % 64] > coding_method[ch][sb][j]) { +int sbjk = sb + (j + k) / 64; +if (sbjk > 29) { +SAMPLES_NEEDED +continue; +} +if (coding_method[ch][sbjk][(j + k) % 64] > coding_method[ch][sb][j]) { if (k > 0) { SAMPLES_NEEDED //not debugged, almost never used ___ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-cvslog] avcodec/qdm2: Do not read out of array in fix_coding_method_array()
ffmpeg | branch: master | Michael Niedermayer | Mon Jun 24 01:01:02 2019 +0200| [ae021c1239ec3bc0a30dc5a4720569071599ece4] | committer: Michael Niedermayer avcodec/qdm2: Do not read out of array in fix_coding_method_array() Instead we ask for a sample, its unclear what to do in this case. Fixes: index 30 out of bounds for type 'int8_t [30][64]' Fixes: 15339/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_QDM2_fuzzer-5749441484554240 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ae021c1239ec3bc0a30dc5a4720569071599ece4 --- libavcodec/qdm2.c | 7 ++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/libavcodec/qdm2.c b/libavcodec/qdm2.c index 1397218bdd..44ff4fa6c6 100644 --- a/libavcodec/qdm2.c +++ b/libavcodec/qdm2.c @@ -408,7 +408,12 @@ static int fix_coding_method_array(int sb, int channels, } for (k = 0; k < run; k++) { if (j + k < 128) { -if (coding_method[ch][sb + (j + k) / 64][(j + k) % 64] > coding_method[ch][sb][j]) { +int sbjk = sb + (j + k) / 64; +if (sbjk > 29) { +SAMPLES_NEEDED +continue; +} +if (coding_method[ch][sbjk][(j + k) % 64] > coding_method[ch][sb][j]) { if (k > 0) { SAMPLES_NEEDED //not debugged, almost never used ___ ffmpeg-cvslog mailing list ffmpeg-cvslog@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-cvslog To unsubscribe, visit link above, or email ffmpeg-cvslog-requ...@ffmpeg.org with subject "unsubscribe".