From 2186555bc9834c16607ee87c1015e8a78bd4ea56 Mon Sep 17 00:00:00 2001
From: Pierre-Anthony Lemieux <pal@palemieux.com>
Date: Mon, 3 Jan 2022 07:59:19 -0800
Subject: [PATCH] avformat/imf: fix bad free() when directory name of the input
 url is empty

Signed-off-by: Pierre-Anthony Lemieux <pal@palemieux.com>
Signed-off-by: Zane van Iperen <zane@zanevaniperen.com>
(cherry picked from commit 59f1a46048109b8ec9f953d0d9348f9f1ae2a8c2)
---
 libavformat/imfdec.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libavformat/imfdec.c b/libavformat/imfdec.c
index 503c8a2659..023f3556f6 100644
--- a/libavformat/imfdec.c
+++ b/libavformat/imfdec.c
@@ -624,8 +624,11 @@ static int imf_read_header(AVFormatContext *s)
     tmp_str = av_strdup(s->url);
     if (!tmp_str)
         return AVERROR(ENOMEM);
+    c->base_url = av_strdup(av_dirname(tmp_str));
+    av_freep(&tmp_str);
+    if (!c->base_url)
+        return AVERROR(ENOMEM);
 
-    c->base_url = av_dirname(tmp_str);
     if ((ret = ffio_copy_url_options(s->pb, &c->avio_opts)) < 0)
         return ret;