wrapper/FFmpeg
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

avcodec/pnm_parser: Check av_image_get_buffer_size() for failure

Browse source 
Fixes: out of array access
Fixes: 30135/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PBM_fuzzer-4997145650397184
Fixes: 30208/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PGMYUV_fuzzer-5605891665690624.fuzz

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Reviewed-by: Paul B Mahol <onemda@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 5314a4996c)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2021-02-10 22:28:20 +01:00
parent 3067d50620
commit 680c8f508b
1 changed files with 4 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

6
libavcodec/pnm_parser.c
View file

@ -65,8 +65,10 @@ retry:
#endif
next = END_NOT_FOUND;
} else {
next = pnmctx.bytestream - pnmctx.bytestream_start
+ avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
int ret = avpicture_get_size(avctx->pix_fmt, avctx->width, avctx->height);
next = pnmctx.bytestream - pnmctx.bytestream_start;
if (ret >= 0)
next += ret;
if (pnmctx.bytestream_start != buf)
next -= pc->index;
if (next > buf_size)