From 024c5b4ab436b9e035517e4181dc3499e7095290 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sat, 29 Oct 2022 17:10:59 +0200 Subject: avcodec/dts2pts_bsf: Check ctx for NULL before ff_cbs_flush() 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 Reviewed-by: James Almer Signed-off-by: Michael Niedermayer --- 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) -- cgit v1.2.3