From: Martin Sebor <msebor@redhat.com>
Date: Wed, 26 Jan 2022 00:39:02 +0000 (-0700)
Subject: io: Fix use-after-free in ftw [BZ #26779]
X-Git-Tag: glibc-2.35~36
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=ee52ab25ba875f458981fce22c54e3c04c7a17d3;p=platform%2Fupstream%2Fglibc.git

io: Fix use-after-free in ftw [BZ #26779]

Reviewed-by: Carlos O'Donell <carlos@redhat.com>
---

diff --git a/io/ftw.c b/io/ftw.c
index 2742541..94bd5a9 100644
--- a/io/ftw.c
+++ b/io/ftw.c
@@ -323,8 +323,9 @@ open_dir_stream (int *dfdp, struct ftw_data *data, struct dir_data *dirp)
 	  buf[actsize++] = '\0';
 
 	  /* Shrink the buffer to what we actually need.  */
-	  data->dirstreams[data->actdir]->content = realloc (buf, actsize);
-	  if (data->dirstreams[data->actdir]->content == NULL)
+	  void *content = realloc (buf, actsize);
+	  data->dirstreams[data->actdir]->content = content;
+	  if (content == NULL)
 	    {
 	      int save_err = errno;
 	      free (buf);