avformat/dhav: Check ffio_ensure_seekback()

Fixes Coverity issue #1492324. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
6 months ago · cf6d07522a
parent 95faf45af1
commit cf6d07522a
1 changed files with 4 additions and 1 deletions
--- 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);