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| author | Michael Niedermayer <michael@niedermayer.cc> | 2019-10-23 20:57:12 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2020-01-06 11:30:43 +0100 |
| commit | 56d708c57f1fd4e2582fae98e86b221de67ed321 (patch) | |
| tree | 65a30102ca12fb5614cddb8fb1f26dd0b9c32f09 | |
| parent | 7358e165c6a42e88bbf62930bd98f4a98d1c7279 (diff) | |
| download | ffmpeg-56d708c57f1fd4e2582fae98e86b221de67ed321.tar.gz | |
avcodec/vp5: Check render_x/y
Fixes: Timeout (15sec -> 91ms)
Fixes: 18353/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_VP5_fuzzer-5704150326706176
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Peter Ross <pross@xvid.org>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 698e042c77ecb5b0d616de254adc783e8b61b9c4)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/vp5.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/libavcodec/vp5.c b/libavcodec/vp5.c index db97e7f772..247225e0fa 100644 --- a/libavcodec/vp5.c +++ b/libavcodec/vp5.c @@ -48,6 +48,8 @@ static int vp5_parse_header(VP56Context *s, const uint8_t *buf, int buf_size) ff_vp56_init_dequant(s, vp56_rac_gets(c, 6)); if (s->frames[VP56_FRAME_CURRENT]->key_frame) { + int render_x, render_y; + vp56_rac_gets(c, 8); if(vp56_rac_gets(c, 5) > 5) return AVERROR_INVALIDDATA; @@ -63,8 +65,11 @@ static int vp5_parse_header(VP56Context *s, const uint8_t *buf, int buf_size) cols << 4, rows << 4); return AVERROR_INVALIDDATA; } - vp56_rac_gets(c, 8); /* number of displayed macroblock rows */ - vp56_rac_gets(c, 8); /* number of displayed macroblock cols */ + render_y = vp56_rac_gets(c, 8); /* number of displayed macroblock rows */ + render_x = vp56_rac_gets(c, 8); /* number of displayed macroblock cols */ + if (render_x == 0 || render_x > cols || + render_y == 0 || render_y > rows) + return AVERROR_INVALIDDATA; vp56_rac_gets(c, 2); if (!s->macroblocks || /* first frame */ 16*cols != s->avctx->coded_width || |