Fixes: signed integer overflow: 1540265776 * 2 cannot be represented in type 'int' Fixes: 18160/clusterfuzz-testcase-minimized-ffmpeg_DEMUXER_fuzzer-5758808818712576
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc> --- libavformat/vividas.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavformat/vividas.c b/libavformat/vividas.c index efe1b8deff..ab3947815a 100644 --- a/libavformat/vividas.c +++ b/libavformat/vividas.c @@ -438,7 +438,7 @@ static int track_index(VividasDemuxContext *viv, AVFormatContext *s, uint8_t *bu ffio_read_varlen(pb); // track_index_len avio_r8(pb); // 'c' viv->n_sb_blocks = ffio_read_varlen(pb); - if (viv->n_sb_blocks * 2 > size) + if (viv->n_sb_blocks < 0 || viv->n_sb_blocks > size / 2) goto error; viv->sb_blocks = av_calloc(viv->n_sb_blocks, sizeof(VIV_SB_block)); if (!viv->sb_blocks) { -- 2.23.0 _______________________________________________ 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".
