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| author | Michael Niedermayer <michael@niedermayer.cc> | 2017-05-08 15:17:31 +0200 |
|---|---|---|
| committer | Michael Niedermayer <michael@niedermayer.cc> | 2017-08-23 13:15:17 +0200 |
| commit | 493dc7bb12ab0cc503fc81a6a3a86df6a7cee676 (patch) | |
| tree | 2c13081c8ad28e9d1f59c07493fb7a428b4f9b79 | |
| parent | 42ae8705fae2d1c4b8aab8e9bcd76a10161ab6d7 (diff) | |
| download | ffmpeg-493dc7bb12ab0cc503fc81a6a3a86df6a7cee676.tar.gz | |
avcodec/dvbsubdec: check region dimensions
Fixes: 1408/clusterfuzz-testcase-minimized-6529985844084736
Fixes: integer overflow
Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/targets/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 0075d9eced22839fa4f7a6eaa02155803ccae3e6)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
| -rw-r--r-- | libavcodec/dvbsubdec.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/libavcodec/dvbsubdec.c b/libavcodec/dvbsubdec.c index 097597ed91..b56103f899 100644 --- a/libavcodec/dvbsubdec.c +++ b/libavcodec/dvbsubdec.c @@ -23,6 +23,7 @@ #include "get_bits.h" #include "bytestream.h" #include "libavutil/colorspace.h" +#include "libavutil/imgutils.h" #include "libavutil/opt.h" #define DVBSUB_PAGE_SEGMENT 0x10 @@ -1138,6 +1139,7 @@ static void dvbsub_parse_region_segment(AVCodecContext *avctx, DVBSubObject *object; DVBSubObjectDisplay *display; int fill; + int ret; if (buf_size < 10) return; @@ -1164,6 +1166,12 @@ static void dvbsub_parse_region_segment(AVCodecContext *avctx, region->height = AV_RB16(buf); buf += 2; + ret = av_image_check_size(region->width, region->height, 0, avctx); + if (ret < 0) { + region->width= region->height= 0; + return; + } + if (region->width * region->height != region->buf_size) { av_free(region->pbuf); |