Message ID | 20201021223733.2563-9-michael@niedermayer.cc |
---|---|
State | Accepted |
Commit | b848baef0dc42d97a5c1ab975cc8994a265b88ae |
Headers | show |
Series | [FFmpeg-devel,1/9] avformat/segafilm: Check that there is a stream | expand |
Context | Check | Description |
---|---|---|
andriy/x86_make | success | Make finished |
andriy/x86_make_fate | success | Make fate finished |
andriy/PPC64_make | success | Make finished |
andriy/PPC64_make_fate | success | Make fate finished |
diff --git a/libavformat/vividas.c b/libavformat/vividas.c index 6e93d96aef..83d0ed1167 100644 --- a/libavformat/vividas.c +++ b/libavformat/vividas.c @@ -673,6 +673,10 @@ static int viv_read_packet(AVFormatContext *s, if (!pb) return AVERROR(EIO); off = avio_tell(pb); + + if (viv->current_sb_entry >= viv->n_sb_entries) + return AVERROR_INVALIDDATA; + off += viv->sb_entries[viv->current_sb_entry].size; if (viv->sb_entries[viv->current_sb_entry].flag == 0) {
This is the simplest fix for the problem, it is possible to instead check this when the variables are set and propagate errors and then fail earlier Fixes: out of array access Fixes: 26490/clusterfuzz-testcase-minimized-ffmpeg_dem_VIVIDAS_fuzzer-5723367078100992 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> --- libavformat/vividas.c | 4 ++++ 1 file changed, 4 insertions(+)