* [PATCH, committed 2.38] stdlib: Improve tst-realpath compatibility with source fortification
@ 2023-08-06 16:54 Andreas K. Hüttel
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From: Andreas K. Hüttel @ 2023-08-06 16:54 UTC (permalink / raw)
To: libc-stable; +Cc: Andreas K . Huettel
From: Andreas K. Huettel <dilfridge@gentoo.org>
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
--
2.41.0
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2023-08-06 16:54 [PATCH, committed 2.38] stdlib: Improve tst-realpath compatibility with source fortification Andreas K. Hüttel
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