[FFmpeg-devel] [PATCH 1/4] avcodec/dts2pts_bsf: Check ctx for NULL before ff_cbs_flush()

[Michael Niedermayer]

Fixes: null pointer dereference
Fixes: 52155/clusterfuzz-testcase-minimized-ffmpeg_BSF_DTS2PTS_fuzzer-5760107527143424

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/dts2pts_bsf.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/libavcodec/dts2pts_bsf.c b/libavcodec/dts2pts_bsf.c
index bf20b1ec8a..8142562d2c 100644
--- a/libavcodec/dts2pts_bsf.c
+++ b/libavcodec/dts2pts_bsf.c
@@ -505,7 +505,8 @@ static void dts2pts_flush(AVBSFContext *ctx)
     s->root = NULL;
 
     ff_cbs_fragment_reset(&s->au);
-    ff_cbs_flush(s->cbc);
+    if (s->cbc)
+        ff_cbs_flush(s->cbc);
 }
 
 static void dts2pts_close(AVBSFContext *ctx)
-- 
2.17.1