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| author | Luca Barbato <lu_zero@gentoo.org> | 2013-06-03 04:53:02 +0200 |
|---|---|---|
| committer | Luca Barbato <lu_zero@gentoo.org> | 2013-06-07 17:23:53 +0200 |
| commit | 9c2216976907336dfae0e8e38a4d70ca2465a92c (patch) | |
| tree | b4bba5303f0f5a4985dec46b42c2f8eab0a7ec1c /libavcodec/tiff.c | |
| parent | 999ccd2d0a43640921088578f138c874f6cc0f8a (diff) | |
| download | ffmpeg-9c2216976907336dfae0e8e38a4d70ca2465a92c.tar.gz | |
tiff: do not overread the source buffer
At least 2 bytes from the source are read every loop.
Reported-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
CC: libav-stable@libav.org
Diffstat (limited to 'libavcodec/tiff.c')
| -rw-r--r-- | libavcodec/tiff.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/libavcodec/tiff.c b/libavcodec/tiff.c index edef8308b8..735eafe721 100644 --- a/libavcodec/tiff.c +++ b/libavcodec/tiff.c @@ -224,10 +224,13 @@ static int tiff_unpack_strip(TiffContext *s, uint8_t *dst, int stride, break; case TIFF_PACKBITS: for (pixels = 0; pixels < width;) { + if (ssrc + size - src < 2) + return AVERROR_INVALIDDATA; code = (int8_t) *src++; if (code >= 0) { code++; - if (pixels + code > width) { + if (pixels + code > width || + ssrc + size - src < code) { av_log(s->avctx, AV_LOG_ERROR, "Copy went out of bounds\n"); return AVERROR_INVALIDDATA; |