[FFmpeg-devel] [PATCH 4/4] avcodec/dirac_parser: Fix overflow in dts

[Michael Niedermayer]

Fixes: signed integer overflow: -2147483648 - 1 cannot be represented in type 'int'
Fixes: 15568/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DIRAC_fuzzer-5634719611355136

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

diff --git a/libavcodec/dirac_parser.c b/libavcodec/dirac_parser.c
index 1ade44a438..8722ef17b7 100644
--- a/libavcodec/dirac_parser.c
+++ b/libavcodec/dirac_parser.c
@@ -214,7 +214,7 @@ static int dirac_combine_frame(AVCodecParserContext *s, AVCodecContext *avctx,
                               pc->index - 13 - pu1.prev_pu_offset;
             int pts = AV_RB32(cur_pu + 13);
             if (s->last_pts == 0 && s->last_dts == 0)
-                s->dts = pts - 1;
+                s->dts = pts - 1LL;
             else
                 s->dts = s->last_dts + 1;
             s->pts = pts;
-- 
2.22.0