Fixes: division by 0 Fixes: 15206/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FITS_fuzzer-5657260212092928
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavcodec/fitsdec.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/libavcodec/fitsdec.c b/libavcodec/fitsdec.c index b0753813c9..2da79e1ef9 100644 --- a/libavcodec/fitsdec.c +++ b/libavcodec/fitsdec.c @@ -168,6 +168,16 @@ static int fits_read_header(AVCodecContext *avctx, const uint8_t **ptr, FITSHead header->data_min = (header->data_min - header->bzero) / header->bscale; header->data_max = (header->data_max - header->bzero) / header->bscale; } + if (!header->rgb) { + if (header->data_min > header->data_max) { + av_log(avctx, AV_LOG_ERROR, "data min/max (%g %g) is invalid\n", header->data_min, header->data_max); + return AVERROR_INVALIDDATA; + } + if (header->data_min == header->data_max) { + av_log(avctx, AV_LOG_WARNING, "data min/max indicates a blank image\n"); + header->data_max ++; + } + } return 0; } -- 2.21.0 _______________________________________________ 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".
