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From d97cca1e5df812be0e4de1e38091f02bb1e7ec4e Mon Sep 17 00:00:00 2001
From: Florian Weimer <fweimer@redhat.com>
Date: Tue, 1 Aug 2023 10:27:15 +0200
Subject: [PATCH] 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.
(cherry picked from commit 510fc20d73de12c85823d9996faac74666e9c2e7)
---
stdlib/tst-realpath.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/stdlib/tst-realpath.c b/stdlib/tst-realpath.c
index f325c95a44..3694ecd8af 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
--
2.33.0
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