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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 <jamrial@gmail.com>
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2022-10-29 17:10:59 +02:00
parent 8e96319674
commit 024c5b4ab4
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GPG Key ID: B18E8928B3948D64
1 changed files with 2 additions and 1 deletions
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libavcodec/dts2pts_bsf.c
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@ -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)