Fixes: passing zero to clz(), which is not a valid argument Fixes: 23337/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PIXLET_fuzzer-5179131989065728
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavcodec/pixlet.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/pixlet.c b/libavcodec/pixlet.c index 7b068b1ce5..78f571cd5f 100644 --- a/libavcodec/pixlet.c +++ b/libavcodec/pixlet.c @@ -221,7 +221,7 @@ static int read_high_coeffs(AVCodecContext *avctx, uint8_t *src, int16_t *dst, length = 25 - nbits; while (i < size) { - if (state >> 8 != -3) + if (((state >> 8) + 3) & 0xFFFFFFF) value = ff_clz((state >> 8) + 3) ^ 0x1F; else value = -1; -- 2.17.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
