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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 /grp
parentx86/CET: Document glibc.tune.x86_ibt and glibc.tune.x86_shstk (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 'grp')
-rw-r--r--grp/tst_fgetgrent.c10
1 files changed, 9 insertions, 1 deletions
diff --git a/grp/tst_fgetgrent.c b/grp/tst_fgetgrent.c
index 501ad99727..d612445fed 100644
--- a/grp/tst_fgetgrent.c
+++ b/grp/tst_fgetgrent.c
@@ -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)