glibc/SOURCES/glibc-upstream-2.34-380.patch
2023-05-09 05:53:24 +00:00

177 lines
5.4 KiB
Diff

commit 88b3228d9f6322b035fa89bb34f82d93b4190d48
Author: Martin Sebor <msebor@redhat.com>
Date: Tue Jan 25 15:39:38 2022 -0700
Avoid -Wuse-after-free in tests [BZ #26779].
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
(cherry picked from commit c094c232eb3246154265bb035182f92fe1b17ab8)
diff --git a/malloc/tst-malloc-backtrace.c b/malloc/tst-malloc-backtrace.c
index 4eb42e7f32f706e9..2ae3fb11efc245cb 100644
--- a/malloc/tst-malloc-backtrace.c
+++ b/malloc/tst-malloc-backtrace.c
@@ -20,6 +20,7 @@
#include <stdlib.h>
#include <support/support.h>
+#include <libc-diag.h>
#define SIZE 4096
@@ -29,7 +30,15 @@ __attribute__((noinline))
call_free (void *ptr)
{
free (ptr);
+#if __GNUC_PREREQ (12, 0)
+ /* Ignore a valid warning about using a pointer made indeterminate
+ by a prior call to free(). */
+ DIAG_IGNORE_NEEDS_COMMENT (12, "-Wuse-after-free");
+#endif
*(size_t *)(ptr - sizeof (size_t)) = 1;
+#if __GNUC_PREREQ (12, 0)
+ DIAG_POP_NEEDS_COMMENT;
+#endif
}
int
diff --git a/malloc/tst-malloc-check.c b/malloc/tst-malloc-check.c
index 6650d09cf6cdde75..c5c9254a9e8936b0 100644
--- a/malloc/tst-malloc-check.c
+++ b/malloc/tst-malloc-check.c
@@ -87,7 +87,15 @@ do_test (void)
merror ("errno is not set correctly.");
DIAG_POP_NEEDS_COMMENT;
+#if __GNUC_PREREQ (12, 0)
+ /* Ignore a valid warning about using a pointer made indeterminate
+ by a prior call to realloc(). */
+ DIAG_IGNORE_NEEDS_COMMENT (12, "-Wuse-after-free");
+#endif
free (p);
+#if __GNUC_PREREQ (12, 0)
+ DIAG_POP_NEEDS_COMMENT;
+#endif
p = malloc (512);
if (p == NULL)
@@ -105,7 +113,15 @@ do_test (void)
merror ("errno is not set correctly.");
DIAG_POP_NEEDS_COMMENT;
+#if __GNUC_PREREQ (12, 0)
+ /* Ignore a valid warning about using a pointer made indeterminate
+ by a prior call to realloc(). */
+ DIAG_IGNORE_NEEDS_COMMENT (12, "-Wuse-after-free");
+#endif
free (p);
+#if __GNUC_PREREQ (12, 0)
+ DIAG_POP_NEEDS_COMMENT;
+#endif
free (q);
return errors != 0;
diff --git a/malloc/tst-malloc-too-large.c b/malloc/tst-malloc-too-large.c
index a4349a9b4c506dfc..328b4a2a4fd72cf4 100644
--- a/malloc/tst-malloc-too-large.c
+++ b/malloc/tst-malloc-too-large.c
@@ -95,7 +95,15 @@ test_large_allocations (size_t size)
DIAG_POP_NEEDS_COMMENT;
#endif
TEST_VERIFY (errno == ENOMEM);
+#if __GNUC_PREREQ (12, 0)
+ /* Ignore a warning about using a pointer made indeterminate by
+ a prior call to realloc(). */
+ DIAG_IGNORE_NEEDS_COMMENT (12, "-Wuse-after-free");
+#endif
free (ptr_to_realloc);
+#if __GNUC_PREREQ (12, 0)
+ DIAG_POP_NEEDS_COMMENT;
+#endif
for (size_t nmemb = 1; nmemb <= 8; nmemb *= 2)
if ((size % nmemb) == 0)
@@ -113,14 +121,30 @@ test_large_allocations (size_t size)
test_setup ();
TEST_VERIFY (reallocarray (ptr_to_realloc, nmemb, size / nmemb) == NULL);
TEST_VERIFY (errno == ENOMEM);
+#if __GNUC_PREREQ (12, 0)
+ /* Ignore a warning about using a pointer made indeterminate by
+ a prior call to realloc(). */
+ DIAG_IGNORE_NEEDS_COMMENT (12, "-Wuse-after-free");
+#endif
free (ptr_to_realloc);
+#if __GNUC_PREREQ (12, 0)
+ DIAG_POP_NEEDS_COMMENT;
+#endif
ptr_to_realloc = malloc (16);
TEST_VERIFY_EXIT (ptr_to_realloc != NULL);
test_setup ();
TEST_VERIFY (reallocarray (ptr_to_realloc, size / nmemb, nmemb) == NULL);
TEST_VERIFY (errno == ENOMEM);
+#if __GNUC_PREREQ (12, 0)
+ /* Ignore a warning about using a pointer made indeterminate by
+ a prior call to realloc(). */
+ DIAG_IGNORE_NEEDS_COMMENT (12, "-Wuse-after-free");
+#endif
free (ptr_to_realloc);
+#if __GNUC_PREREQ (12, 0)
+ DIAG_POP_NEEDS_COMMENT;
+#endif
}
else
break;
diff --git a/malloc/tst-obstack.c b/malloc/tst-obstack.c
index ee1385d0f764e368..7d700c4f9a86b676 100644
--- a/malloc/tst-obstack.c
+++ b/malloc/tst-obstack.c
@@ -21,8 +21,8 @@ verbose_malloc (size_t size)
static void
verbose_free (void *buf)
{
- free (buf);
printf ("free (%p)\n", buf);
+ free (buf);
}
static int
diff --git a/malloc/tst-realloc.c b/malloc/tst-realloc.c
index c89ac07e192d70eb..80711beab1257ed5 100644
--- a/malloc/tst-realloc.c
+++ b/malloc/tst-realloc.c
@@ -138,8 +138,16 @@ do_test (void)
if (ok == 0)
merror ("first 16 bytes were not correct after failed realloc");
+#if __GNUC_PREREQ (12, 0)
+ /* Ignore a valid warning about using a pointer made indeterminate
+ by a prior call to realloc(). */
+ DIAG_IGNORE_NEEDS_COMMENT (12, "-Wuse-after-free");
+#endif
/* realloc (p, 0) frees p (C89) and returns NULL (glibc). */
p = realloc (p, 0);
+#if __GNUC_PREREQ (12, 0)
+ DIAG_POP_NEEDS_COMMENT;
+#endif
if (p != NULL)
merror ("realloc (p, 0) returned non-NULL.");
diff --git a/support/tst-support-open-dev-null-range.c b/support/tst-support-open-dev-null-range.c
index 8e29def1ce780629..80c97e51586bf6ce 100644
--- a/support/tst-support-open-dev-null-range.c
+++ b/support/tst-support-open-dev-null-range.c
@@ -39,10 +39,11 @@ check_path (int fd)
char file_path[PATH_MAX];
ssize_t file_path_length
= readlink (proc_fd_path, file_path, sizeof (file_path));
- free (proc_fd_path);
if (file_path_length < 0)
FAIL_EXIT1 ("readlink (%s, %p, %zu)", proc_fd_path, file_path,
sizeof (file_path));
+
+ free (proc_fd_path);
file_path[file_path_length] = '\0';
TEST_COMPARE_STRING (file_path, "/dev/null");
}