diff mbox

[FFmpeg-devel,2/2] avcodec/gdv: Check for truncated tags in decompress_5()

Message ID 20190225010447.6277-2-michael@niedermayer.cc
State Accepted
Commit 5cf42f65b60d226d1223d2100cb1d90402189275
Headers show

Commit Message

Michael Niedermayer Feb. 25, 2019, 1:04 a.m. UTC 
Testcase: 13169/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_GDV_fuzzer-5666354038833152

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
---
 libavcodec/gdv.c | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/libavcodec/gdv.c b/libavcodec/gdv.c
index c5d80f43f6..183286b55f 100644
--- a/libavcodec/gdv.c
+++ b/libavcodec/gdv.c
@@ -294,6 +294,8 @@  static int decompress_5(AVCodecContext *avctx, unsigned skip)
 
     while (bytestream2_get_bytes_left_p(pb) > 0 && bytestream2_get_bytes_left(gb) > 0) {
         int tag = read_bits2(&bits, gb);
+        if (bytestream2_get_bytes_left(gb) < 1)
+            return AVERROR_INVALIDDATA;
         if (tag == 0) {
             bytestream2_put_byte(pb, bytestream2_get_byte(gb));
         } else if (tag == 1) {