forked from rpms/glibc
122 lines
4.1 KiB
Diff
122 lines
4.1 KiB
Diff
commit 969e9733c7d17edf1e239a73fa172f357561f440
|
|
Author: Florian Weimer <fweimer@redhat.com>
|
|
Date: Tue Feb 21 09:20:28 2023 +0100
|
|
|
|
gshadow: Matching sgetsgent, sgetsgent_r ERANGE handling (bug 30151)
|
|
|
|
Before this change, sgetsgent_r did not set errno to ERANGE, but
|
|
sgetsgent only check errno, not the return value from sgetsgent_r.
|
|
Consequently, sgetsgent did not detect any error, and reported
|
|
success to the caller, without initializing the struct sgrp object
|
|
whose address was returned.
|
|
|
|
This commit changes sgetsgent_r to set errno as well. This avoids
|
|
similar issues in applications which only change errno.
|
|
|
|
Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
|
|
|
|
diff --git a/gshadow/Makefile b/gshadow/Makefile
|
|
index 796fbbf473..a95524593a 100644
|
|
--- a/gshadow/Makefile
|
|
+++ b/gshadow/Makefile
|
|
@@ -26,7 +26,7 @@ headers = gshadow.h
|
|
routines = getsgent getsgnam sgetsgent fgetsgent putsgent \
|
|
getsgent_r getsgnam_r sgetsgent_r fgetsgent_r
|
|
|
|
-tests = tst-gshadow tst-putsgent tst-fgetsgent_r
|
|
+tests = tst-gshadow tst-putsgent tst-fgetsgent_r tst-sgetsgent
|
|
|
|
CFLAGS-getsgent_r.c += -fexceptions
|
|
CFLAGS-getsgent.c += -fexceptions
|
|
diff --git a/gshadow/sgetsgent_r.c b/gshadow/sgetsgent_r.c
|
|
index ea085e91d7..c75624e1f7 100644
|
|
--- a/gshadow/sgetsgent_r.c
|
|
+++ b/gshadow/sgetsgent_r.c
|
|
@@ -61,7 +61,10 @@ __sgetsgent_r (const char *string, struct sgrp *resbuf, char *buffer,
|
|
buffer[buflen - 1] = '\0';
|
|
sp = strncpy (buffer, string, buflen);
|
|
if (buffer[buflen - 1] != '\0')
|
|
- return ERANGE;
|
|
+ {
|
|
+ __set_errno (ERANGE);
|
|
+ return ERANGE;
|
|
+ }
|
|
}
|
|
else
|
|
sp = (char *) string;
|
|
diff --git a/gshadow/tst-sgetsgent.c b/gshadow/tst-sgetsgent.c
|
|
new file mode 100644
|
|
index 0000000000..0370c10fd0
|
|
--- /dev/null
|
|
+++ b/gshadow/tst-sgetsgent.c
|
|
@@ -0,0 +1,69 @@
|
|
+/* Test large input for sgetsgent (bug 30151).
|
|
+ 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 <gshadow.h>
|
|
+#include <stddef.h>
|
|
+#include <support/check.h>
|
|
+#include <support/support.h>
|
|
+#include <support/xmemstream.h>
|
|
+#include <stdlib.h>
|
|
+
|
|
+static int
|
|
+do_test (void)
|
|
+{
|
|
+ /* Create a shadow group with 1000 members. */
|
|
+ struct xmemstream mem;
|
|
+ xopen_memstream (&mem);
|
|
+ const char *passwd = "k+zD0nucwfxAo3sw1NXUj6K5vt5M16+X0TVGdE1uFvq5R8V7efJ";
|
|
+ fprintf (mem.out, "group-name:%s::m0", passwd);
|
|
+ for (int i = 1; i < 1000; ++i)
|
|
+ fprintf (mem.out, ",m%d", i);
|
|
+ xfclose_memstream (&mem);
|
|
+
|
|
+ /* Call sgetsgent. */
|
|
+ char *input = mem.buffer;
|
|
+ struct sgrp *e = sgetsgent (input);
|
|
+ TEST_VERIFY_EXIT (e != NULL);
|
|
+ TEST_COMPARE_STRING (e->sg_namp, "group-name");
|
|
+ TEST_COMPARE_STRING (e->sg_passwd, passwd);
|
|
+ /* No administrators. */
|
|
+ TEST_COMPARE_STRING (e->sg_adm[0], NULL);
|
|
+ /* Check the members list. */
|
|
+ for (int i = 0; i < 1000; ++i)
|
|
+ {
|
|
+ char *member = xasprintf ("m%d", i);
|
|
+ TEST_COMPARE_STRING (e->sg_mem[i], member);
|
|
+ free (member);
|
|
+ }
|
|
+ TEST_COMPARE_STRING (e->sg_mem[1000], NULL);
|
|
+
|
|
+ /* Check that putsgent brings back the input string. */
|
|
+ xopen_memstream (&mem);
|
|
+ TEST_COMPARE (putsgent (e, mem.out), 0);
|
|
+ xfclose_memstream (&mem);
|
|
+ /* Compare without the trailing '\n' that putsgent added. */
|
|
+ TEST_COMPARE (mem.buffer[mem.length - 1], '\n');
|
|
+ mem.buffer[mem.length - 1] = '\0';
|
|
+ TEST_COMPARE_STRING (mem.buffer, input);
|
|
+
|
|
+ free (mem.buffer);
|
|
+ free (input);
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+#include <support/test-driver.c>
|