Quoting Michael Niedermayer (2022-09-22 20:08:51) > Fixes: signed integer overflow: 119760682 - -2084600173 cannot be represented > in type 'int' > Fixes: > 50993/clusterfuzz-testcase-minimized-ffmpeg_dem_VIVIDAS_fuzzer-6745781167587328 > > 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 | 13 +++++++++++-- > 1 file changed, 11 insertions(+), 2 deletions(-) > > diff --git a/libavformat/vividas.c b/libavformat/vividas.c > index e9954f73ed0..e8efe49a5c0 100644 > --- a/libavformat/vividas.c > +++ b/libavformat/vividas.c > @@ -683,6 +683,7 @@ static int viv_read_packet(AVFormatContext *s, > > if (viv->sb_entries[viv->current_sb_entry].flag == 0) { > uint64_t v_size = ffio_read_varlen(pb); > + int last, last_start; > > if (!viv->num_audio) > return AVERROR_INVALIDDATA; > @@ -704,14 +705,22 @@ static int viv_read_packet(AVFormatContext *s, > start = ffio_read_varlen(pb); > pcm_bytes = ffio_read_varlen(pb); > > - if (i > 0 && start == 0) > - break; > + if (i > 0) { > + if (start == 0) > + break; > + if (start < last || start - (unsigned)last > INT_MAX)
What is the second condition for? -- Anton Khirnov _______________________________________________ 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".
