ffmpeg | branch: master | Michael Niedermayer <mich...@niedermayer.cc> | Thu Sep 19 19:43:03 2024 +0200| [ad35eaf848bb605d9b2b3a638265ac9d385878e3] | committer: Michael Niedermayer
avcodec/osq: Treat sum = 0 as k = 0 We have no valid sample that triggers this so we do not know if this would decode correctly, but -inf is not the correct k value Fixes: Assertion n>=0 && n<=32 failed at libavcodec/get_bits.h:423 Fixes: -inf is outside the range of representable values of type 'int' Fixes: 70709/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_OSQ_fuzzer-6223623839350784 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ad35eaf848bb605d9b2b3a638265ac9d385878e3 --- libavcodec/osq.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/osq.c b/libavcodec/osq.c index 4e921896c0..2b75364c18 100644 --- a/libavcodec/osq.c +++ b/libavcodec/osq.c @@ -160,6 +160,8 @@ static int update_residue_parameter(OSQChannel *cb) int rice_k; sum = cb->sum; + if (!sum) + return 0; x = sum / cb->count; rice_k = ceil(log2(x)); if (rice_k >= 30) { _______________________________________________ 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".
