Fixes use of uninitialized value, reported by MSAN. Found by OSS-Fuzz.
Signed-off-by: Kacper Michajłow <kaspe...@gmail.com> --- libavcodec/jpegxl_parser.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/libavcodec/jpegxl_parser.c b/libavcodec/jpegxl_parser.c index 8c45e1a1b7..8371d78a45 100644 --- a/libavcodec/jpegxl_parser.c +++ b/libavcodec/jpegxl_parser.c @@ -504,9 +504,14 @@ static int read_dist_clustering(GetBitContext *gb, JXLEntropyDecoder *dec, JXLDi return 0; } + if (get_bits_left(gb) <= 0) + return AVERROR_BUFFER_TOO_SMALL; + if (get_bits1(gb)) { /* simple clustering */ - uint32_t nbits = get_bits(gb, 2); + int nbits = get_bits(gb, 2); + if (get_bits_left(gb) < nbits * bundle->num_dist) + return AVERROR_BUFFER_TOO_SMALL; for (int i = 0; i < bundle->num_dist; i++) bundle->cluster_map[i] = get_bitsz(gb, nbits); } else { -- 2.43.0 _______________________________________________ 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".