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| author | Michael Niedermayer <michael@niedermayer.cc> | 2018-09-12 02:11:00 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2018-09-28 01:33:42 +0200 |
| commit | 8db9097308dcc72f3f1f459a2b39f7a987ddd978 (patch) | |
| tree | 82f1d92100653c31212de13a11da0623fc668430 /libavcodec/bintext.c | |
| parent | 35517e3ca7ea2e243e3e29ec7d4d2a9f150f25ed (diff) | |
| download | ffmpeg-8db9097308dcc72f3f1f459a2b39f7a987ddd978.tar.gz | |
avcodec/bintext: Check input size before allocating the input image
Fixes: Timeout
Fixes: 9795/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_XBIN_fuzzer-5768631928487936
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
Diffstat (limited to 'libavcodec/bintext.c')
| -rw-r--r-- | libavcodec/bintext.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/bintext.c b/libavcodec/bintext.c index d967317671..b14a2a9c29 100644 --- a/libavcodec/bintext.c +++ b/libavcodec/bintext.c @@ -146,6 +146,9 @@ static int decode_frame(AVCodecContext *avctx, const uint8_t *buf_end = buf+buf_size; int ret; + if ((avctx->width / FONT_WIDTH) * (avctx->height / s->font_height) / 256 > buf_size) + return AVERROR_INVALIDDATA; + s->x = s->y = 0; if ((ret = ff_reget_buffer(avctx, s->frame)) < 0) return ret; |