mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-10-03 17:29:30 +02:00
avcodec/wmv2dec: Skip I frame if its smaller than 1/8 of the minimal size
Frames that small are not valid and of limited use for error concealment, while being very computationally intensive to process. Fixes: Timeout Fixes: 11168/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMV2_fuzzer-5733782032744448 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
parent
09ec182864
commit
d6f4341522
@ -181,6 +181,14 @@ int ff_wmv2_decode_secondary_picture_header(MpegEncContext *s)
|
|||||||
}
|
}
|
||||||
|
|
||||||
s->dc_table_index = get_bits1(&s->gb);
|
s->dc_table_index = get_bits1(&s->gb);
|
||||||
|
|
||||||
|
// at minimum one bit per macroblock is required at least in a valid frame,
|
||||||
|
// we discard frames much smaller than this. Frames smaller than 1/8 of the
|
||||||
|
// smallest "black/skip" frame generally contain not much recoverable content
|
||||||
|
// while at the same time they have the highest computational requirements
|
||||||
|
// per byte
|
||||||
|
if (get_bits_left(&s->gb) * 8LL < (s->width+15)/16 * ((s->height+15)/16))
|
||||||
|
return AVERROR_INVALIDDATA;
|
||||||
}
|
}
|
||||||
s->inter_intra_pred = 0;
|
s->inter_intra_pred = 0;
|
||||||
s->no_rounding = 1;
|
s->no_rounding = 1;
|
||||||
|
Loading…
Reference in New Issue
Block a user