From f7a1453f27583c36a3417c4a731b45ac4235b660 Mon Sep 17 00:00:00 2001
From: David Rosca <nowrep@gmail.com>
Date: Mon, 13 May 2024 09:38:49 +0200
Subject: [PATCH] lavc/vaapi_decode: Reject decoding of frames with no slices

Matches other hwaccels.
---
 libavcodec/vaapi_decode.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libavcodec/vaapi_decode.c b/libavcodec/vaapi_decode.c
index 21b273cd0f..7f2fe032db 100644
--- a/libavcodec/vaapi_decode.c
+++ b/libavcodec/vaapi_decode.c
@@ -156,6 +156,11 @@ int ff_vaapi_decode_issue(AVCodecContext *avctx,
     VAStatus vas;
     int err;
 
+    if (pic->nb_slices <= 0) {
+        err = AVERROR(EINVAL);
+        goto fail;
+    }
+
     av_log(avctx, AV_LOG_DEBUG, "Decode to surface %#x.\n",
            pic->output_surface);