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| author | Michael Niedermayer <michael@niedermayer.cc> | 2015-07-18 19:18:24 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2015-07-28 02:42:16 +0200 |
| commit | be369f6e4034bee7630ea70d7b516bdee25ff40f (patch) | |
| tree | d8c109e14f13a061f0cbc37b1d1de21156f4a2a3 | |
| parent | 1166d9245ab1ee76905a8ec7355a7f03f611ed83 (diff) | |
| download | ffmpeg-be369f6e4034bee7630ea70d7b516bdee25ff40f.tar.gz | |
avcodec/vp8: Check buffer size in vp8_decode_frame_header()
avoids null pointer dereference
Fixes: signal_sigsegv_d5de40_964_vp80-00-comprehensive-010.ivf with memlimit of 1048576
Found-by: Samuel Groß, Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 599d746e07319dc792ed2e511b666fe482f1ff88)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/vp8.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/libavcodec/vp8.c b/libavcodec/vp8.c index 8313544c35..944db5ef6d 100644 --- a/libavcodec/vp8.c +++ b/libavcodec/vp8.c @@ -639,6 +639,11 @@ static int vp8_decode_frame_header(VP8Context *s, const uint8_t *buf, int buf_si int width = s->avctx->width; int height = s->avctx->height; + if (buf_size < 3) { + av_log(s->avctx, AV_LOG_ERROR, "Insufficent data (%d) for header\n", buf_size); + return AVERROR_INVALIDDATA; + } + s->keyframe = !(buf[0] & 1); s->profile = (buf[0]>>1) & 7; s->invisible = !(buf[0] & 0x10); |