AuroraMiddleware/glibc
1
0
Fork 0
mirror of https://sourceware.org/git/glibc.git synced 2024-11-08 14:20:07 +00:00
Code Issues Packages Projects Releases Wiki Activity

Avoid insecure usage of tmpnam in tests.

Browse Source 
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.
This commit is contained in:
Joseph Myers 2018-07-18 21:04:12 +00:00
parent 6d90776dff
commit 5c112f1b62
13 changed files with 127 additions and 44 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
ChangeLog
View File

@ -1,3 +1,35 @@
2018-07-18 Joseph Myers <joseph@codesourcery.com>
* 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.
(main): Remove macrofile here.
(get_null_defines): Use mkstemp instead of tmpnam. Do not remove
macrofile here.
(check_header): 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.
(main): Remove macrofile here.
(get_null_defines): Use mkstemp instead of tmpnam. Do not remove
macrofile here.
(check_header): Do not remove macrofile here.
2018-07-18 H.J. Lu <hongjiu.lu@intel.com>
* manual/tunables.texi: Document glibc.tune.x86_ibt and

10
grp/tst_fgetgrent.c
View File

@ -21,6 +21,7 @@
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <unistd.h>
static int errors;
@ -99,7 +100,14 @@ test_fgetgrent (const char *filename)
int
main (int argc, char *argv[])
{
char *file = tmpnam (NULL);
char file[] = "/tmp/tst_fgetgrent.XXXXXX";
int fd = mkstemp (file);
if (fd == -1)
{
printf ("mkstemp failed: %m\n");
return 1;
}
close (fd);
int i = 0;
if (argc > 1)

12
io/test-utime.c
View File

@ -27,23 +27,17 @@
int
main (int argc, char *argv[])
{
char file[L_tmpnam];
char file[] = "/tmp/test-utime.XXXXXX";
struct utimbuf ut;
struct stat st;
struct stat stnow;
time_t now1, now2;
int fd;
if (tmpnam (file) == 0)
{
perror ("tmpnam");
return 1;
}
fd = creat (file, 0666);
fd = mkstemp (file);
if (fd < 0)
{
perror ("creat");
perror ("mkstemp");
return 1;
}
close (fd);

14
posix/annexc.c
View File

@ -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)

9
posix/bug-getopt1.c
View File

@ -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)
{

9
posix/bug-getopt2.c
View File

@ -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)
{

9
posix/bug-getopt3.c
View File

@ -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)
{

9
posix/bug-getopt4.c
View File

@ -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)
{

9
posix/bug-getopt5.c
View File

@ -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)
{

22
stdio-common/bug7.c
View File

@ -1,21 +1,25 @@
/* Regression test for fseek and freopen bugs. */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
int
main (int argc, char *argv[])
{
int lose = 0;
char filename[L_tmpnam];
char filename[] = "/tmp/bug7.XXXXXX";
FILE *fp;
if (tmpnam (filename) == NULL)
int fd = mkstemp (filename);
if (fd == -1)
{
printf ("tmpnam failed\n");
printf ("mkstemp failed\n");
lose = 1;
}
else
{
close (fd);
fp = fopen (filename, "w+");
fprintf (fp, "Hello world!\n");
fflush (fp);
@ -32,17 +36,21 @@ main (int argc, char *argv[])
{
FILE *file1;
FILE *file2;
char filename1[L_tmpnam];
char filename2[L_tmpnam];
char filename1[] = "/tmp/bug7.XXXXXX";
char filename2[] = "/tmp/bug7.XXXXXX";
int ch;
if (tmpnam (filename1) == NULL || tmpnam (filename2) == NULL)
int fd1 = mkstemp (filename1);
int fd2 = mkstemp (filename2);
if (fd1 == -1 || fd2 == -1)
{
printf ("tmpnam failed\n");
printf ("mkstemp failed\n");
lose = 1;
}
else
{
close (fd1);
close (fd2);
file1 = fopen (filename1, "w");
fclose (file1);

11
stdio-common/tst-fdopen.c
View File

@ -1,6 +1,7 @@
/* Test for fdopen bugs. */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
@ -18,12 +19,18 @@ char buffer[256];
int
main (int argc, char *argv[])
{
char *name;
char name[] = "/tmp/tst-fdopen.XXXXXX";
FILE *fp = NULL;
int retval = 0;
int fd;
name = tmpnam (NULL);
fd = mkstemp (name);
if (fd == -1)
{
printf ("mkstemp failed: %m\n");
return 1;
}
close (fd);
fp = fopen (name, "w");
assert (fp != NULL)
fputs ("foobar and baz", fp);

11
stdio-common/tst-ungetc.c
View File

@ -1,6 +1,7 @@
/* Test for ungetc bugs. */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#undef assert
@ -15,13 +16,19 @@
int
main (int argc, char *argv[])
{
char *name;
char name[] = "/tmp/tst-ungetc.XXXXXX";
FILE *fp = NULL;
int retval = 0;
int c;
char buffer[64];
name = tmpnam (NULL);
int fd = mkstemp (name);
if (fd == -1)
{
printf ("mkstemp failed: %m\n");
return 1;
}
close (fd);
fp = fopen (name, "w");
assert (fp != NULL)
fputs ("bla", fp);

14
stdlib/isomac.c
View File

@ -77,7 +77,7 @@
#define HEADER_MAX 256
static const char *macrofile;
static char macrofile[] = "/tmp/isomac.XXXXXX";
/* ISO C header names including Amendment 1 (without ".h" suffix). */
static char *header[] =
@ -219,6 +219,8 @@ main (int argc, char *argv[])
result |= check_header (file_name, 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;
@ -249,7 +251,13 @@ 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));
@ -330,7 +338,6 @@ get_null_defines (void)
}
result[result_len] = NULL;
fclose (input);
remove (macrofile);
return (const char **) result;
}
@ -439,7 +446,6 @@ check_header (const char *file_name, const char **except)
}
}
fclose (input);
remove (macrofile);
return result;
}