From 4a10bc8f6f5d600c44ecb9b43cd9abf13bf3bfae Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Fri, 10 Jul 2020 19:37:57 +0200 Subject: avcodec/cbs_jpeg: Fix uninitialized end index in cbs_jpeg_split_fragment() Fixes: Out of array read Fixes: 24043/clusterfuzz-testcase-minimized-ffmpeg_BSF_TRACE_HEADERS_fuzzer-5084566275751936.fuzz Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/cbs_jpeg.c | 1 + 1 file changed, 1 insertion(+) diff --git a/libavcodec/cbs_jpeg.c b/libavcodec/cbs_jpeg.c index 09329434e4..7d3e10fcc8 100644 --- a/libavcodec/cbs_jpeg.c +++ b/libavcodec/cbs_jpeg.c @@ -149,6 +149,7 @@ static int cbs_jpeg_split_fragment(CodedBitstreamContext *ctx, break; } else if (marker == JPEG_MARKER_SOS) { next_marker = -1; + end = start; for (i = start; i + 1 < frag->data_size; i++) { if (frag->data[i] != 0xff) continue; -- cgit v1.2.3