target_dec_fuzzer is checking for the avpkt.data pointer but if the png parser cannot combine the frame, the poutbuf is not set and so, the avpkt.data is not initialized. --- libavcodec/png_parser.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/libavcodec/png_parser.c b/libavcodec/png_parser.c index 74f2964118..d1b2926154 100644 --- a/libavcodec/png_parser.c +++ b/libavcodec/png_parser.c @@ -99,8 +99,11 @@ static int png_parse(AVCodecParserContext *s, AVCodecContext *avctx, } flush: - if (ff_combine_frame(&ppc->pc, next, &buf, &buf_size) < 0) + if (ff_combine_frame(&ppc->pc, next, &buf, &buf_size) < 0) { + *poutbuf = NULL; + *poutbuf_size = 0; return buf_size; + } ppc->chunk_pos = ppc->pc.frame_start_found = 0; -- 2.27.0.rc2.251.g90737beb825-goog _______________________________________________ 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".