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| author | wm4 <nfxjfg@googlemail.com> | 2015-01-07 23:57:50 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2015-01-08 02:11:21 +0100 |
| commit | b76dc8b5b8f7a637b3232329d574a42af35878ca (patch) | |
| tree | 9726da7489e8c6026a537dd700a9f1590fbaeb34 | |
| parent | 6e2204b1529268afff489e34ab064ede3dfe569e (diff) | |
| download | ffmpeg-b76dc8b5b8f7a637b3232329d574a42af35878ca.tar.gz | |
avcodec/dvdsubdec: error on bitmaps with size 0
Attemtping to decode them could lead to invalid writes with some fuzzed
samples.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
(cherry picked from commit bcaa9099b3648b47060e1724a97dc98b63c83702)
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
| -rw-r--r-- | libavcodec/dvdsubdec.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/libavcodec/dvdsubdec.c b/libavcodec/dvdsubdec.c index 0fcf0fb450..122a4c7edb 100644 --- a/libavcodec/dvdsubdec.c +++ b/libavcodec/dvdsubdec.c @@ -108,6 +108,9 @@ static int decode_rle(uint8_t *bitmap, int linesize, int w, int h, if (start >= buf_size) return -1; + if (w <= 0 || h <= 0) + return -1; + bit_len = (buf_size - start) * 8; init_get_bits(&gb, buf + start, bit_len); |