Decoding different pictures in different slice threads simultaneously
leads to all kinds of UB.
Bug-Id: 690
---
This has already been fixed in master during one of the refactoring rounds.
---
libavcodec/h264_slice.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/libavcodec/h264_slice.c b/libavcodec/h264_slice.c
index c2c3e9f..8d4b342 100644
--- a/libavcodec/h264_slice.c
+++ b/libavcodec/h264_slice.c
@@ -1216,6 +1216,12 @@ int ff_h264_decode_slice_header(H264Context *h,
H264Context *h0)
}
}
+ if (!h0->current_slice && h != h0) {
+ av_log(h->avctx, AV_LOG_ERROR,
+ "A new picture can only be started in the first slice
thread\n");
+ return AVERROR(ENOSYS);
+ }
+
slice_type = get_ue_golomb_31(&h->gb);
if (slice_type > 9) {
av_log(h->avctx, AV_LOG_ERROR,
--
2.0.0
_______________________________________________
libav-devel mailing list
[email protected]
https://lists.libav.org/mailman/listinfo/libav-devel
