forked from rpms/glibc
138 lines
4.3 KiB
Diff
138 lines
4.3 KiB
Diff
commit 1d44530a5be2442e064baa48139adc9fdfb1fc6b
|
|
Author: Florian Weimer <fweimer@redhat.com>
|
|
Date: Thu Jun 15 12:08:22 2023 +0200
|
|
|
|
string: strerror must not return NULL (bug 30555)
|
|
|
|
For strerror, this fixes commit 28aff047818eb1726394296d27b ("string:
|
|
Implement strerror in terms of strerror_l"). This commit avoids
|
|
returning NULL for strerror_l as well, although POSIX allows this
|
|
behavior for strerror_l.
|
|
|
|
Reviewed-by: Arjun Shankar <arjun@redhat.com>
|
|
|
|
Conflicts:
|
|
string/Makefile
|
|
(usual test differences)
|
|
|
|
diff --git a/string/Makefile b/string/Makefile
|
|
index f0fce2a0b8dea752..a385c8fdfed330b2 100644
|
|
--- a/string/Makefile
|
|
+++ b/string/Makefile
|
|
@@ -63,7 +63,7 @@ tests := tester inl-tester noinl-tester testcopy test-ffs \
|
|
tst-strtok_r bug-strcoll2 tst-cmp tst-xbzero-opt \
|
|
test-endian-types test-endian-file-scope \
|
|
test-endian-sign-conversion tst-memmove-overflow \
|
|
- test-sig_np
|
|
+ test-sig_np tst-strerror-fail
|
|
|
|
# Both tests require the .mo translation files generated by msgfmt.
|
|
tests-translation := tst-strsignal \
|
|
diff --git a/string/strerror_l.c b/string/strerror_l.c
|
|
index a381c79c5a0ba2a1..20aa3efe4714faee 100644
|
|
--- a/string/strerror_l.c
|
|
+++ b/string/strerror_l.c
|
|
@@ -43,10 +43,15 @@ __strerror_l (int errnum, locale_t loc)
|
|
struct tls_internal_t *tls_internal = __glibc_tls_internal ();
|
|
free (tls_internal->strerror_l_buf);
|
|
if (__asprintf (&tls_internal->strerror_l_buf, "%s%d",
|
|
- translate ("Unknown error ", loc), errnum) == -1)
|
|
- tls_internal->strerror_l_buf = NULL;
|
|
-
|
|
- err = tls_internal->strerror_l_buf;
|
|
+ translate ("Unknown error ", loc), errnum) > 0)
|
|
+ err = tls_internal->strerror_l_buf;
|
|
+ else
|
|
+ {
|
|
+ /* The memory was freed above. */
|
|
+ tls_internal->strerror_l_buf = NULL;
|
|
+ /* Provide a fallback translation. */
|
|
+ err = (char *) translate ("Unknown error", loc);
|
|
+ }
|
|
}
|
|
else
|
|
err = (char *) translate (err, loc);
|
|
diff --git a/string/tst-strerror-fail.c b/string/tst-strerror-fail.c
|
|
new file mode 100644
|
|
index 0000000000000000..e0fa45ab2b12f6b3
|
|
--- /dev/null
|
|
+++ b/string/tst-strerror-fail.c
|
|
@@ -0,0 +1,77 @@
|
|
+/* Check that strerror, strerror_l do not return NULL on failure (bug 30555).
|
|
+ Copyright (C) 2023 Free Software Foundation, Inc.
|
|
+ This file is part of the GNU C Library.
|
|
+
|
|
+ The GNU C Library is free software; you can redistribute it and/or
|
|
+ modify it under the terms of the GNU Lesser General Public
|
|
+ License as published by the Free Software Foundation; either
|
|
+ version 2.1 of the License, or (at your option) any later version.
|
|
+
|
|
+ The GNU C Library is distributed in the hope that it will be useful,
|
|
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
+ Lesser General Public License for more details.
|
|
+
|
|
+ You should have received a copy of the GNU Lesser General Public
|
|
+ License along with the GNU C Library; if not, see
|
|
+ <https://www.gnu.org/licenses/>. */
|
|
+
|
|
+
|
|
+#include <locale.h>
|
|
+#include <stdbool.h>
|
|
+#include <stdlib.h>
|
|
+#include <string.h>
|
|
+#include <support/check.h>
|
|
+#include <support/namespace.h>
|
|
+#include <support/xdlfcn.h>
|
|
+
|
|
+/* Interposed malloc that can be used to inject allocation failures. */
|
|
+
|
|
+static volatile bool fail_malloc;
|
|
+
|
|
+void *
|
|
+malloc (size_t size)
|
|
+{
|
|
+ if (fail_malloc)
|
|
+ return NULL;
|
|
+
|
|
+ static void *(*original_malloc) (size_t);
|
|
+ if (original_malloc == NULL)
|
|
+ original_malloc = xdlsym (RTLD_NEXT, "malloc");
|
|
+ return original_malloc (size);
|
|
+}
|
|
+
|
|
+/* Callbacks for the actual tests. Use fork to run both tests with a
|
|
+ clean state. */
|
|
+
|
|
+static void
|
|
+test_strerror (void *closure)
|
|
+{
|
|
+ fail_malloc = true;
|
|
+ const char *s = strerror (999);
|
|
+ fail_malloc = false;
|
|
+ TEST_COMPARE_STRING (s, "Unknown error");
|
|
+}
|
|
+
|
|
+static void
|
|
+test_strerror_l (void *closure)
|
|
+{
|
|
+ locale_t loc = newlocale (LC_ALL, "C", (locale_t) 0);
|
|
+ TEST_VERIFY (loc != (locale_t) 0);
|
|
+ fail_malloc = true;
|
|
+ const char *s = strerror_l (999, loc);
|
|
+ fail_malloc = false;
|
|
+ TEST_COMPARE_STRING (s, "Unknown error");
|
|
+ freelocale (loc);
|
|
+}
|
|
+
|
|
+static int
|
|
+do_test (void)
|
|
+{
|
|
+ support_isolate_in_subprocess (test_strerror, NULL);
|
|
+ support_isolate_in_subprocess (test_strerror_l, NULL);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+#include <support/test-driver.c>
|