From: Florian Weimer <fweimer@redhat.com>
Date: Tue, 1 Aug 2023 08:27:15 +0000 (+0200)
Subject: stdlib: Improve tst-realpath compatibility with source fortification
X-Git-Tag: glibc-2.39~541
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=510fc20d73de12c85823d9996faac74666e9c2e7;p=thirdparty%2Fglibc.git

stdlib: Improve tst-realpath compatibility with source fortification

On GCC before 11, IPA can make the fortified realpath aware that the
buffer size is not large enough (8 bytes instead of PATH_MAX bytes).
Fix this by using a buffer that is large enough.
---

diff --git a/stdlib/tst-realpath.c b/stdlib/tst-realpath.c
index f325c95a448..3694ecd8af3 100644
--- a/stdlib/tst-realpath.c
+++ b/stdlib/tst-realpath.c
@@ -24,6 +24,7 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
+#include <limits.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <malloc.h>
@@ -50,7 +51,11 @@ void dealloc (void *p)
 
 char* alloc (void)
 {
-  return (char *)malloc (8);
+#ifdef PATH_MAX
+  return (char *)malloc (PATH_MAX);
+#else
+  return (char *)malloc (4096);
+#endif
 }
 
 static int