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authorJoseph Myers <joseph@codesourcery.com>2018-07-18 21:04:12 +0000
committerJoseph Myers <joseph@codesourcery.com>2018-07-18 21:04:12 +0000
commit5c112f1b62b6fca7348c64a004e9fc4cfdaca1ad (patch)
tree67ea596cd3c6810bb13df1fb6a1e0d2ae29f7120 /posix
parent6d90776dff7e70e08fa46f9cd7576dd0eeb06da2 (diff)
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Avoid insecure usage of tmpnam in tests.
Various glibc testcases use tmpnam in ways subject to race conditions (generate a temporary file name, then later open that file without O_EXCL). This patch fixes those tests to use mkstemp - generally a minimal local fix to use mkstemp instead of tmpnam, rather than a larger fix to use other testsuite infrastructure for temporary files. The unchanged use of tmpnam in posix/wordexp-test.c would fail safe in the event of a race (it's generating a name for use with mkdir rather than for a file to be opened for writing). Tested for x86_64. * grp/tst_fgetgrent.c: Include <unistd.h>. (main): Use mkstemp instead of tmpnam. * io/test-utime.c (main): Likewise. * posix/annexc.c (macrofile): Change to modifiable array. (get_null_defines): Use mkstemp instead of tmpnam. Do not remove macrofile here. * posix/bug-getopt1.c: Include <stdlib.h>. (do_test): Use mkstemp instead of tmpnam. * posix/bug-getopt2.c: Include <stdlib.h>. (do_test): Use mkstemp instead of tmpnam. * posix/bug-getopt3.c: Include <stdlib.h>. (do_test): Use mkstemp instead of tmpnam. * posix/bug-getopt4.c: Include <stdlib.h>. (do_test): Use mkstemp instead of tmpnam. * posix/bug-getopt5.c: Include <stdlib.h>. (do_test): Use mkstemp instead of tmpnam. * stdio-common/bug7.c: Include <stdlib.h> and <unistd.h>. (main): Use mkstemp instead of tmpnam. * stdio-common/tst-fdopen.c: Include <stdlib.h>. (main): Use mkstemp instead of tmpnam. * stdio-common/tst-ungetc.c: Include <stdlib.h>. (main): use mkstemp instead of tmpnam. * stdlib/isomac.c (macrofile): Change to modifiable array. (get_null_defines): Use mkstemp instead of tmpnam. Do not remove macrofile here.
Diffstat (limited to 'posix')
-rw-r--r--posix/annexc.c14
-rw-r--r--posix/bug-getopt1.c9
-rw-r--r--posix/bug-getopt2.c9
-rw-r--r--posix/bug-getopt3.c9
-rw-r--r--posix/bug-getopt4.c9
-rw-r--r--posix/bug-getopt5.c9
6 files changed, 40 insertions, 19 deletions
diff --git a/posix/annexc.c b/posix/annexc.c
index fe3a600..66768db 100644
--- a/posix/annexc.c
+++ b/posix/annexc.c
@@ -26,7 +26,7 @@
#define HEADER_MAX 256
-static const char *macrofile;
+static char macrofile[] = "/tmp/annexc.XXXXXX";
/* <aio.h>. */
static const char *const aio_syms[] =
@@ -657,6 +657,8 @@ main (int argc, char *argv[])
for (h = 0; h < NUMBER_OF_HEADERS; ++h)
result |= check_header (&headers[h], ignore_list);
+ remove (macrofile);
+
/* The test suite should return errors but for now this is not
practical. Give a warning and ask the user to correct the bugs. */
return result;
@@ -712,7 +714,13 @@ get_null_defines (void)
FILE *input;
int first = 1;
- macrofile = tmpnam (NULL);
+ int fd = mkstemp (macrofile);
+ if (fd == -1)
+ {
+ printf ("mkstemp failed: %m\n");
+ exit (1);
+ }
+ close (fd);
command = malloc (sizeof fmt + sizeof "/dev/null" + 2 * strlen (CC)
+ strlen (INC) + strlen (macrofile));
@@ -784,7 +792,6 @@ get_null_defines (void)
}
result[result_len] = NULL;
fclose (input);
- remove (macrofile);
return (const char **) result;
}
@@ -879,7 +886,6 @@ check_header (const struct header *header, const char **except)
result |= 1;
}
fclose (input);
- remove (macrofile);
for (i = 0; i < header->nsyms; ++i)
if (found[i] == 0)
diff --git a/posix/bug-getopt1.c b/posix/bug-getopt1.c
index a47dc7e..a5a3711 100644
--- a/posix/bug-getopt1.c
+++ b/posix/bug-getopt1.c
@@ -1,6 +1,7 @@
/* BZ 11039 */
#include <unistd.h>
#include <stdio.h>
+#include <stdlib.h>
static int
one_test (const char *fmt, int argc, char *argv[], int expected[argc - 1])
@@ -39,12 +40,14 @@ one_test (const char *fmt, int argc, char *argv[], int expected[argc - 1])
static int
do_test (void)
{
- char *fname = tmpnam (NULL);
- if (fname == NULL)
+ char fname[] = "/tmp/bug-getopt1.XXXXXX";
+ int fd = mkstemp (fname);
+ if (fd == -1)
{
- puts ("cannot generate name for temporary file");
+ printf ("mkstemp failed: %m\n");
return 1;
}
+ close (fd);
if (freopen (fname, "w+", stderr) == NULL)
{
diff --git a/posix/bug-getopt2.c b/posix/bug-getopt2.c
index 93c3035..8f92f0c 100644
--- a/posix/bug-getopt2.c
+++ b/posix/bug-getopt2.c
@@ -1,6 +1,7 @@
/* BZ 11039 */
#include <unistd.h>
#include <stdio.h>
+#include <stdlib.h>
static int
one_test (const char *fmt, int argc, char *argv[], int expected[argc - 1])
@@ -37,12 +38,14 @@ one_test (const char *fmt, int argc, char *argv[], int expected[argc - 1])
static int
do_test (void)
{
- char *fname = tmpnam (NULL);
- if (fname == NULL)
+ char fname[] = "/tmp/bug-getopt2.XXXXXX";
+ int fd = mkstemp (fname);
+ if (fd == -1)
{
- puts ("cannot generate name for temporary file");
+ printf ("mkstemp failed: %m\n");
return 1;
}
+ close (fd);
if (freopen (fname, "w+", stderr) == NULL)
{
diff --git a/posix/bug-getopt3.c b/posix/bug-getopt3.c
index c3a8cb2..45a8d3e 100644
--- a/posix/bug-getopt3.c
+++ b/posix/bug-getopt3.c
@@ -2,6 +2,7 @@
#include <getopt.h>
#include <unistd.h>
#include <stdio.h>
+#include <stdlib.h>
static const struct option opts[] =
{
@@ -48,12 +49,14 @@ one_test (const char *fmt, int argc, char *argv[], int n, int expected[n],
static int
do_test (void)
{
- char *fname = tmpnam (NULL);
- if (fname == NULL)
+ char fname[] = "/tmp/bug-getopt3.XXXXXX";
+ int fd = mkstemp (fname);
+ if (fd == -1)
{
- puts ("cannot generate name for temporary file");
+ printf ("mkstemp failed: %m\n");
return 1;
}
+ close (fd);
if (freopen (fname, "w+", stderr) == NULL)
{
diff --git a/posix/bug-getopt4.c b/posix/bug-getopt4.c
index 0956ca5..c5e3c14 100644
--- a/posix/bug-getopt4.c
+++ b/posix/bug-getopt4.c
@@ -2,6 +2,7 @@
#include <getopt.h>
#include <unistd.h>
#include <stdio.h>
+#include <stdlib.h>
static const struct option opts[] =
{
@@ -52,12 +53,14 @@ one_test (const char *fmt, int argc, char *argv[], int n, int expected[n])
static int
do_test (void)
{
- char *fname = tmpnam (NULL);
- if (fname == NULL)
+ char fname[] = "/tmp/bug-getopt4.XXXXXX";
+ int fd = mkstemp (fname);
+ if (fd == -1)
{
- puts ("cannot generate name for temporary file");
+ printf ("mkstemp failed: %m\n");
return 1;
}
+ close (fd);
if (freopen (fname, "w+", stderr) == NULL)
{
diff --git a/posix/bug-getopt5.c b/posix/bug-getopt5.c
index ed2639d..4f67d9b 100644
--- a/posix/bug-getopt5.c
+++ b/posix/bug-getopt5.c
@@ -2,6 +2,7 @@
#include <getopt.h>
#include <unistd.h>
#include <stdio.h>
+#include <stdlib.h>
static const struct option opts[] =
{
@@ -47,12 +48,14 @@ one_test (const char *fmt, int argc, char *argv[], int n, int expected[n])
static int
do_test (void)
{
- char *fname = tmpnam (NULL);
- if (fname == NULL)
+ char fname[] = "/tmp/bug-getopt5.XXXXXX";
+ int fd = mkstemp (fname);
+ if (fd == -1)
{
- puts ("cannot generate name for temporary file");
+ printf ("mkstemp failed: %m\n");
return 1;
}
+ close (fd);
if (freopen (fname, "w+", stderr) == NULL)
{