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authorFlorian Weimer <fweimer@redhat.com>2015-09-22 13:20:18 +0200
committerFlorian Weimer <fweimer@redhat.com>2015-09-22 13:20:18 +0200
commite07aabba73ea62e7dfa0512507c92efb851fbdbe (patch)
treed9abe6dfcc6eacb639e968712370f67a59dacc47 /nss
parentc77dd7eb9b7f7cf87fdb1c0f6f1922d8735412eb (diff)
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Add test case for bug 18287
Diffstat (limited to 'nss')
-rw-r--r--nss/Makefile3
-rw-r--r--nss/bug18287.c235
2 files changed, 237 insertions, 1 deletions
diff --git a/nss/Makefile b/nss/Makefile
index 65ab7b5..f6ef912 100644
--- a/nss/Makefile
+++ b/nss/Makefile
@@ -47,7 +47,8 @@ install-bin := getent makedb
makedb-modules = xmalloc hash-string
extra-objs += $(makedb-modules:=.o)
-tests = test-netdb tst-nss-test1 test-digits-dots tst-nss-getpwent
+tests = test-netdb tst-nss-test1 test-digits-dots \
+ tst-nss-getpwent bug18287
xtests = bug-erange
# Specify rules for the nss_* modules. We have some services.
diff --git a/nss/bug18287.c b/nss/bug18287.c
new file mode 100644
index 0000000..57abab0
--- /dev/null
+++ b/nss/bug18287.c
@@ -0,0 +1,235 @@
+/* Copyright (C) 2015 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
+ <http://www.gnu.org/licenses/>. */
+
+#include <errno.h>
+#include <pwd.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/* Check if two passwd structs contain the same data. */
+static bool
+equal (const struct passwd *a, const struct passwd *b)
+{
+ return strcmp (a->pw_name, b->pw_name) == 0
+ && strcmp (a->pw_passwd, b->pw_passwd) == 0
+ && a->pw_uid == b->pw_uid
+ && a->pw_gid == b->pw_gid
+ && strcmp (a->pw_gecos, b->pw_gecos) == 0
+ && strcmp (a->pw_dir, b->pw_dir) == 0
+ && strcmp (a->pw_shell, b->pw_shell) == 0;
+}
+
+enum { MAX_TEST_ITEMS = 10 };
+static struct passwd test_items[MAX_TEST_ITEMS];
+static int test_count;
+
+/* Initialize test_items and test_count above, with data from the
+ passwd database. */
+static bool
+init_test_items (void)
+{
+ setpwent ();
+ do
+ {
+ struct passwd *pwd = getpwent ();
+ if (pwd == NULL)
+ break;
+ struct passwd *target = test_items + test_count;
+ target->pw_name = strdup (pwd->pw_name);
+ target->pw_passwd = strdup (pwd->pw_passwd);
+ target->pw_uid = pwd->pw_uid;
+ target->pw_gid = pwd->pw_gid;
+ target->pw_gecos = strdup (pwd->pw_gecos);
+ target->pw_dir = strdup (pwd->pw_dir);
+ target->pw_shell = strdup (pwd->pw_shell);
+ }
+ while (++test_count < MAX_TEST_ITEMS);
+ endpwent ();
+
+ /* Filter out those test items which cannot be looked up by name or
+ UID. */
+ bool found = false;
+ for (int i = 0; i < test_count; ++i)
+ {
+ struct passwd *pwd1 = getpwnam (test_items[i].pw_name);
+ struct passwd *pwd2 = getpwuid (test_items[i].pw_uid);
+ if (pwd1 == NULL || !equal (pwd1, test_items + i)
+ || pwd2 == NULL || !equal (pwd2, test_items + i))
+ test_items[i].pw_name = NULL;
+ else
+ found = true;
+ }
+
+ if (!found)
+ puts ("error: no accounts found which can be looked up by name and UID.");
+ return found;
+}
+
+/* Set to true if an error is encountered. */
+static bool errors;
+
+/* Return true if the padding has not been tampered with. */
+static bool
+check_padding (char *buffer, size_t size, char pad)
+{
+ char *end = buffer + size;
+ while (buffer < end)
+ {
+ if (*buffer != pad)
+ return false;
+ ++buffer;
+ }
+ return true;
+}
+
+/* Test one buffer size and padding combination. */
+static void
+test_one (const struct passwd *item, size_t buffer_size,
+ char pad, size_t padding_size)
+{
+ char *buffer = malloc (buffer_size + padding_size);
+ if (buffer == NULL)
+ {
+ puts ("error: malloc failure");
+ errors = true;
+ return;
+ }
+
+ struct passwd pwd;
+ struct passwd *result;
+ int ret;
+
+ /* Test getpwname_r. */
+ memset (buffer, pad, buffer_size + padding_size);
+ pwd = (struct passwd) {};
+ ret = getpwnam_r (item->pw_name, &pwd, buffer, buffer_size, &result);
+ if (!check_padding (buffer + buffer_size, padding_size, pad))
+ {
+ printf ("error: padding change: "
+ "name \"%s\", buffer size %zu, padding size %zu, pad 0x%02x\n",
+ item->pw_name, buffer_size, padding_size, (unsigned char) pad);
+ errors = true;
+ }
+ if (ret == 0)
+ {
+ if (result == NULL)
+ {
+ printf ("error: no data: name \"%s\", buffer size %zu\n",
+ item->pw_name, buffer_size);
+ errors = true;
+ }
+ else if (!equal (item, result))
+ {
+ printf ("error: lookup mismatch: name \"%s\", buffer size %zu\n",
+ item->pw_name, buffer_size);
+ errors = true;
+ }
+ }
+ else if (ret != ERANGE)
+ {
+ errno = ret;
+ printf ("error: lookup failure for name \"%s\": %m (%d)\n",
+ item->pw_name, ret);
+ errors = true;
+ }
+
+ /* Test getpwuid_r. */
+ memset (buffer, pad, buffer_size + padding_size);
+ pwd = (struct passwd) {};
+ ret = getpwuid_r (item->pw_uid, &pwd, buffer, buffer_size, &result);
+ if (!check_padding (buffer + buffer_size, padding_size, pad))
+ {
+ printf ("error: padding change: "
+ "UID %ld, buffer size %zu, padding size %zu, pad 0x%02x\n",
+ (long) item->pw_uid, buffer_size, padding_size,
+ (unsigned char) pad);
+ errors = true;
+ }
+ if (ret == 0)
+ {
+ if (result == NULL)
+ {
+ printf ("error: no data: UID %ld, buffer size %zu\n",
+ (long) item->pw_uid, buffer_size);
+ errors = true;
+ }
+ else if (!equal (item, result))
+ {
+ printf ("error: lookup mismatch: UID %ld, buffer size %zu\n",
+ (long) item->pw_uid, buffer_size);
+ errors = true;
+ }
+ }
+ else if (ret != ERANGE)
+ {
+ errno = ret;
+ printf ("error: lookup failure for UID \"%ld\": %m (%d)\n",
+ (long) item->pw_uid, ret);
+ errors = true;
+ }
+
+ free (buffer);
+}
+
+/* Test one buffer size with different paddings. */
+static void
+test_buffer_size (size_t buffer_size)
+{
+ for (int i = 0; i < test_count; ++i)
+ for (size_t padding_size = 0; padding_size < 3; ++padding_size)
+ {
+ test_one (test_items + i, buffer_size, '\0', padding_size);
+ if (padding_size > 0)
+ {
+ test_one (test_items + i, buffer_size, ':', padding_size);
+ test_one (test_items + i, buffer_size, '\n', padding_size);
+ test_one (test_items + i, buffer_size, '\xff', padding_size);
+ test_one (test_items + i, buffer_size, '@', padding_size);
+ }
+ }
+}
+
+int
+do_test (void)
+{
+ if (!init_test_items ())
+ return 1;
+ printf ("info: %d test items\n", test_count);
+
+ for (size_t buffer_size = 0; buffer_size <= 65; ++buffer_size)
+ test_buffer_size (buffer_size);
+ for (size_t buffer_size = 64 + 4; buffer_size < 256; buffer_size += 4)
+ test_buffer_size (buffer_size);
+ test_buffer_size (255);
+ test_buffer_size (257);
+ for (size_t buffer_size = 256; buffer_size < 512; buffer_size += 8)
+ test_buffer_size (buffer_size);
+ test_buffer_size (511);
+ test_buffer_size (513);
+ test_buffer_size (1024);
+ test_buffer_size (2048);
+
+ if (errors)
+ return 1;
+ else
+ return 0;
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"