RepoMirrors
/
ffmpeg
mirror of https://git.ffmpeg.org/ffmpeg.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity

avcodec/zmbv: obtain frame later 

The frame is not needed that early so obtaining it later avoids
the costly operation in case other checks fail.

Fixes: Timeout (14sec -> 4sec)
Fixes: 13140/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_ZMBV_fuzzer-5738330308739072

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Tomas Härdin <tjoppen@acc.umu.se>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-02-21 17:25:14 +01:00
parent 61523683c5
commit 177b40890c
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
libavcodec/zmbv.c
View File

@ -525,9 +525,6 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPac
return AVERROR_INVALIDDATA;
}
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
return ret;
if (c->comp == 0) { // uncompressed data
if (c->decomp_size < len) {
av_log(avctx, AV_LOG_ERROR, "Buffer too small\n");
@ -553,6 +550,9 @@ static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPac
av_log(avctx, AV_LOG_ERROR, "decompressed size %d is incorrect, expected %d\n", c->decomp_len, expected_size);
return AVERROR_INVALIDDATA;
}
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
return ret;
if (c->flags & ZMBV_KEYFRAME) {
frame->key_frame = 1;
frame->pict_type = AV_PICTURE_TYPE_I;