[FFmpeg-cvslog] avformat/dhav: Check ffio_ensure_seekback()

[Andreas Rheinhardt]

ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at outlook.com> | Wed May 22 06:56:23 2024 +0200| [cf6d07522a37ea9508468ffc43a0299f3e1c014c] | committer: Andreas Rheinhardt

avformat/dhav: Check ffio_ensure_seekback()

Fixes Coverity issue #1492324.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at outlook.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=cf6d07522a37ea9508468ffc43a0299f3e1c014c
---

 libavformat/dhav.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libavformat/dhav.c b/libavformat/dhav.c
index 303fb42bed..8e08274e68 100644
--- a/libavformat/dhav.c
+++ b/libavformat/dhav.c
@@ -273,8 +273,11 @@ static int dhav_read_header(AVFormatContext *s)
 {
     DHAVContext *dhav = s->priv_data;
     uint8_t signature[5];
+    int ret = ffio_ensure_seekback(s->pb, 5);
+
+    if (ret < 0)
+        return ret;
 
-    ffio_ensure_seekback(s->pb, 5);
     avio_read(s->pb, signature, sizeof(signature));
     if (!memcmp(signature, "DAHUA", 5)) {
         avio_skip(s->pb, 0x400 - 5);