[FFmpeg-cvslog] avcodec/h264_slice: Check input SPS in ff_h264_update_thread_context()

[Michael Niedermayer]

ffmpeg | branch: master | Michael Niedermayer <michael at niedermayer.cc> | Sat Mar 20 14:36:28 2021 +0100| [ceae92cb291c2536a93482cdf3c1ae3f7330b924] | committer: Michael Niedermayer

avcodec/h264_slice: Check input SPS in ff_h264_update_thread_context()

Fixes: crash
Fixes: check_pkt.mp4

Found-by: Rafael Dutra <rafael.dutra at cispa.de>
Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=ceae92cb291c2536a93482cdf3c1ae3f7330b924
---

 libavcodec/h264_slice.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/libavcodec/h264_slice.c b/libavcodec/h264_slice.c
index 84b5710ab4..62f7a61aed 100644
--- a/libavcodec/h264_slice.c
+++ b/libavcodec/h264_slice.c
@@ -304,9 +304,8 @@ int ff_h264_update_thread_context(AVCodecContext *dst,
     if (dst == src)
         return 0;
 
-    // We can't fail if SPS isn't set at it breaks current skip_frame code
-    //if (!h1->ps.sps)
-    //    return AVERROR_INVALIDDATA;
+    if (inited && !h1->ps.sps)
+        return AVERROR_INVALIDDATA;
 
     if (inited &&
         (h->width                 != h1->width                 ||