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 <mich...@niedermayer.cc> --- libavcodec/pnm_parser.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) 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; -- 2.17.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
