Message ID | 20210211211715.6234-1-michael@niedermayer.cc |
---|---|
State | Accepted |
Commit | 5314a4996cc76e2a8534c74a66f5181e95ac64fc |
Headers | show |
Series | [FFmpeg-devel,1/4] avcodec/pnm_parser: Check av_image_get_buffer_size() for failure | expand |
Context | Check | Description |
---|---|---|
andriy/x86_make | success | Make finished |
andriy/x86_make_fate | success | Make fate finished |
andriy/PPC64_make | success | Make finished |
andriy/PPC64_make_fate | success | Make fate finished |
lgtm
On Thu, Feb 11, 2021 at 10:27:58PM +0100, Paul B Mahol wrote:
> lgtm
will apply
thx
[...]
diff --git a/libavcodec/pnm_parser.c b/libavcodec/pnm_parser.c index d19dbfe98c..f3be6d640c 100644 --- a/libavcodec/pnm_parser.c +++ b/libavcodec/pnm_parser.c @@ -109,8 +109,10 @@ retry: if (next == END_NOT_FOUND) pnmpc->ascii_scan = sync - pnmctx.bytestream + skip; } else { - next = pnmctx.bytestream - pnmctx.bytestream_start + skip - + av_image_get_buffer_size(avctx->pix_fmt, avctx->width, avctx->height, 1); + int ret = av_image_get_buffer_size(avctx->pix_fmt, avctx->width, avctx->height, 1); + next = pnmctx.bytestream - pnmctx.bytestream_start + skip; + if (ret >= 0) + next += ret; } if (next != END_NOT_FOUND && pnmctx.bytestream_start != buf + skip) next -= pc->index;
Fixes: out of array access Fixes: 30135/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PBM_fuzzer-4997145650397184 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> --- libavcodec/pnm_parser.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)