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authorJacob Erlbeck <jerlbeck@sysmocom.de>2013-08-06 14:29:14 +0200
committerHolger Hans Peter Freyther <holger@moiji-mobile.com>2013-08-06 14:56:30 +0200
commitae15a2cac1a01e98e34b4ccd8932ae8f1b99186c (patch)
tree802d601560c648b886bcca545fbc17846c94ef46
parenta652abc5bf75435ba7f1c96ed914cf5805fc326f (diff)
vty: Fix misusage of snprintf in vty/utils.c
Compiled with ubuntu 1204 (precise), where -Wformat-security is enabled by -Wall. Test yields ok, but the current implementation doesn't properly support multi-character separators and end strings. So the test output is truncated. Addresses: utils.c: In function 'vty_cmd_string_from_valstr': utils.c:84:2: warning: format not a string literal and no format arguments [-Wformat-security] utils.c:84:2: warning: format not a string literal and no format arguments [-Wformat-security] utils.c:108:2: warning: format not a string literal and no format arguments [-Wformat-security] utils.c:108:2: warning: format not a string literal and no format arguments [-Wformat-security]
-rw-r--r--.gitignore1
-rw-r--r--src/vty/utils.c4
-rw-r--r--tests/Makefile.am9
-rw-r--r--tests/testsuite.at6
-rw-r--r--tests/vty/vty_test.c52
-rw-r--r--tests/vty/vty_test.ok3
6 files changed, 71 insertions, 4 deletions
diff --git a/.gitignore b/.gitignore
index 2ed0144..da36165 100644
--- a/.gitignore
+++ b/.gitignore
@@ -72,6 +72,7 @@ tests/fr/fr_test
tests/loggingrb/loggingrb_test
tests/ringbuf/ringbuf_test
tests/strrb/strrb_test
+tests/vty/vty_test
utils/osmo-arfcn
utils/osmo-auc-gen
diff --git a/src/vty/utils.c b/src/vty/utils.c
index e9c0d2d..88932fa 100644
--- a/src/vty/utils.c
+++ b/src/vty/utils.c
@@ -81,7 +81,7 @@ char *vty_cmd_string_from_valstr(void *ctx, const struct value_string *vals,
if (!str)
return NULL;
- ret = snprintf(str + offset, rem, prefix);
+ ret = snprintf(str + offset, rem, "%s", prefix);
if (ret < 0)
goto err;
OSMO_SNPRINTF_RET(ret, rem, offset, len);
@@ -105,7 +105,7 @@ char *vty_cmd_string_from_valstr(void *ctx, const struct value_string *vals,
offset--; /* to remove the trailing | */
rem++;
- ret = snprintf(str + offset, rem, end);
+ ret = snprintf(str + offset, rem, "%s", end);
if (ret < 0)
goto err;
OSMO_SNPRINTF_RET(ret, rem, offset, len);
diff --git a/tests/Makefile.am b/tests/Makefile.am
index e5fc718..ecb2b6c 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -5,7 +5,8 @@ check_PROGRAMS = timer/timer_test sms/sms_test ussd/ussd_test \
conv/conv_test auth/milenage_test lapd/lapd_test \
gsm0808/gsm0808_test gsm0408/gsm0408_test \
gb/bssgp_fc_test logging/logging_test fr/fr_test \
- loggingrb/loggingrb_test strrb/strrb_test
+ loggingrb/loggingrb_test strrb/strrb_test \
+ vty/vty_test
if ENABLE_MSGFILE
check_PROGRAMS += msgfile/msgfile_test
@@ -62,6 +63,9 @@ loggingrb_loggingrb_test_LDADD = $(top_builddir)/src/libosmocore.la $(top_buildd
strrb_strrb_test_SOURCES = strrb/strrb_test.c
strrb_strrb_test_LDADD = $(top_builddir)/src/libosmocore.la
+vty_vty_test_SOURCES = vty/vty_test.c
+vty_vty_test_LDADD = $(top_builddir)/src/vty/libosmovty.la $(top_builddir)/src/libosmocore.la
+
# The `:;' works around a Bash 3.2 bug when the output is not writeable.
$(srcdir)/package.m4: $(top_srcdir)/configure.ac
@@ -91,7 +95,8 @@ EXTRA_DIST = testsuite.at $(srcdir)/package.m4 $(TESTSUITE) \
msgfile/msgfile_test.ok msgfile/msgconfig.cfg \
logging/logging_test.ok logging/logging_test.err \
fr/fr_test.ok loggingrb/logging_test.ok \
- loggingrb/logging_test.err strrb/strrb_test.ok
+ loggingrb/logging_test.err strrb/strrb_test.ok \
+ vty/vty_test.ok
DISTCLEANFILES = atconfig
diff --git a/tests/testsuite.at b/tests/testsuite.at
index 684ec4f..1a6fa55 100644
--- a/tests/testsuite.at
+++ b/tests/testsuite.at
@@ -112,3 +112,9 @@ AT_KEYWORDS([strrb])
cat $abs_srcdir/strrb/strrb_test.ok > expout
AT_CHECK([$abs_top_builddir/tests/strrb/strrb_test], [0], [expout], [ignore])
AT_CLEANUP
+
+AT_SETUP([vty])
+AT_KEYWORDS([vty])
+cat $abs_srcdir/vty/vty_test.ok > expout
+AT_CHECK([$abs_top_builddir/tests/vty/vty_test], [0], [expout], [ignore])
+AT_CLEANUP
diff --git a/tests/vty/vty_test.c b/tests/vty/vty_test.c
new file mode 100644
index 0000000..2a9be84
--- /dev/null
+++ b/tests/vty/vty_test.c
@@ -0,0 +1,52 @@
+/* (C) 2013 by Jacob Erlbeck <jerlbeck@sysmocom.de>
+ * All Rights Reserved
+ *
+ * This program is iree software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <stdio.h>
+#include <string.h>
+
+#include <osmocom/core/talloc.h>
+#include <osmocom/core/logging.h>
+#include <osmocom/core/utils.h>
+#include <osmocom/vty/misc.h>
+
+static void test_cmd_string_from_valstr(void)
+{
+ char *cmd;
+ const struct value_string printf_seq_vs[] = {
+ { .value = 42, .str = "[foo%s%s%s%s%s]"},
+ { .value = 43, .str = "[bar%s%s%s%s%s]"},
+ { .value = 0, .str = NULL}
+ };
+
+ printf("Going to test vty_cmd_string_from_valstr()\n");
+
+ /* check against character strings that could break printf */
+
+ cmd = vty_cmd_string_from_valstr (NULL, printf_seq_vs, "[prefix%s%s%s%s%s]", "[sep%s%s%s%s%s]", "[end%s%s%s%s%s]", 1);
+ printf ("Tested with %%s-strings, resulting cmd = '%s'\n", cmd);
+ talloc_free (cmd);
+}
+
+int main(int argc, char **argv)
+{
+ test_cmd_string_from_valstr();
+ printf("All tests passed\n");
+
+ return 0;
+}
diff --git a/tests/vty/vty_test.ok b/tests/vty/vty_test.ok
new file mode 100644
index 0000000..9ff68c8
--- /dev/null
+++ b/tests/vty/vty_test.ok
@@ -0,0 +1,3 @@
+Going to test vty_cmd_string_from_valstr()
+Tested with %s-strings, resulting cmd = '[prefix%s%s%s%s%s][foo%s%s%s%s%s][sep%s%s%s%s%s]['
+All tests passed