[FFmpeg-cvslog] avcodec/h264dec: Skip late SEI
Michael Niedermayer
git at videolan.org
Wed Oct 12 15:46:15 EEST 2022
ffmpeg | branch: release/3.4 | Michael Niedermayer <michael at niedermayer.cc> | Wed Apr 27 22:16:51 2022 +0200| [b66fa64a9fdf7981c91613f2e220991677e66568] | committer: Michael Niedermayer
avcodec/h264dec: Skip late SEI
Fixes: Race condition
Fixes: clusterfuzz-testcase-minimized-mediasource_MP2T_AVC_pipeline_integration_fuzzer-6282675434094592
Found-by: google ClusterFuzz
Tested-by: Dan Sanders <sandersd at google.com>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
(cherry picked from commit f7dd408d64013ae177c1f8d0e04418e5075db5bc)
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b66fa64a9fdf7981c91613f2e220991677e66568
---
libavcodec/h264dec.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libavcodec/h264dec.c b/libavcodec/h264dec.c
index 6a28f3a3ae..17eaf4c76f 100644
--- a/libavcodec/h264dec.c
+++ b/libavcodec/h264dec.c
@@ -724,6 +724,10 @@ static int decode_nal_units(H264Context *h, const uint8_t *buf, int buf_size)
avpriv_request_sample(avctx, "data partitioning");
break;
case H264_NAL_SEI:
+ if (h->setup_finished) {
+ avpriv_request_sample(avctx, "Late SEI");
+ break;
+ }
ret = ff_h264_sei_decode(&h->sei, &nal->gb, &h->ps, avctx);
h->has_recovery_point = h->has_recovery_point || h->sei.recovery_point.recovery_frame_cnt != -1;
if (avctx->debug & FF_DEBUG_GREEN_MD)
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