ffmpeg | branch: master | Michael Niedermayer <mich...@niedermayer.cc> | Tue Jun 17 02:31:28 2025 +0200| [a5f861d335491ce2350102b74c7a17f875cad0ed] | committer: Michael Niedermayer
avcodec/osq: Switch back to av_ceil_log2() This returns to code closer to prior 56c334d732dbbce43b0c8fc0809ec545b7946832 The prior fixes should limit the sum and avoid the need for double argument log2() Fixes: Assertion n>=0 && n<=32 failed at libavcodec/get_bits.h:406 Fixes: 410109093/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_OSQ_fuzzer-6550900028276736 No testcases except fuzzers Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> > http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=a5f861d335491ce2350102b74c7a17f875cad0ed --- libavcodec/osq.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/libavcodec/osq.c b/libavcodec/osq.c index d3b1d86ee3..025be667a3 100644 --- a/libavcodec/osq.c +++ b/libavcodec/osq.c @@ -165,7 +165,8 @@ static int update_residue_parameter(OSQChannel *cb) if (!sum) return 0; x = sum / cb->count; - rice_k = ceil(log2(x)); + av_assert2(x <= 0x80000000U); + rice_k = av_ceil_log2(x); if (rice_k >= 30) { double f = floor(sum / 1.4426952 + 0.5); if (f <= 1) { _______________________________________________ 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".
