| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Sat, 29 Jul 2017 23:42:52 +0900
From: Paul Elder <paul.elder@...t.edu>
To: Shuah Khan <shuahkh@....samsung.com>, shuah@...nel.org,
gregkh@...uxfoundation.org, alicef@...too.org,
alice.ferrazzi@...il.com
Cc: linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kselftest: exec: make exec test output conform to TAP13
On 07/27/2017 01:58 AM, Shuah Khan wrote:
> Hi Paul,
>
> Please see comments below:
>
> On 07/25/2017 11:12 AM, Paul Elder wrote:
>> Convert exec test output to TAP13 format, using the ksft framework.
>>
>> Signed-off-by: Paul Elder <paul.elder@...t.edu>
>> ---
>>
>> Depends on Shuah Khan's patch: "[PATCH 2/3] selftests: kselftest framework: add API to return pass/fail/* counts" (https://na01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.spinics.net%2Flists%2Flinux-kselftest%2Fmsg01964.html&data=01%7C01%7Cpaul.elder%40pitt.edu%7C0709e3fc974f4ccf6fcb08d4d4478c78%7C9ef9f489e0a04eeb87cc3a526112fd0d%7C1&sdata=G3AQ%2FJRvrD0AXNupCNBbi4Ne9%2FAbYBZxZ3GryWev%2FN4%3D&reserved=0)
>>
>> tools/testing/selftests/exec/execveat.c | 148 +++++++++++++++++---------------
>> 1 file changed, 81 insertions(+), 67 deletions(-)
>>
>> diff --git a/tools/testing/selftests/exec/execveat.c b/tools/testing/selftests/exec/execveat.c
>> index 8d5d1d2ee7c1..dc94c0661459 100644
>> --- a/tools/testing/selftests/exec/execveat.c
>> +++ b/tools/testing/selftests/exec/execveat.c
>> @@ -20,6 +20,8 @@
>> #include <string.h>
>> #include <unistd.h>
>>
>> +#include "../kselftest.h"
>> +
>> static char longpath[2 * PATH_MAX] = "";
>> static char *envp[] = { "IN_TEST=yes", NULL, NULL };
>> static char *argv[] = { "execveat", "99", NULL };
>> @@ -41,23 +43,26 @@ static int _check_execveat_fail(int fd, const char *path, int flags,
>> int expected_errno, const char *errno_str)
>> {
>> int rc;
>> + char msg[512];
>
> You need a line between declarations and code.
Okay.
>
>> + snprintf(msg, 512, "Check failure of execveat(%d, '%s', %d) with %s...\n",
>> + fd, path?:"(null)", flags, errno_str);
>
> Is there is a need to use snprinf() here? ksft_test_result_fail() does suppoort
> var args now. Also, please use sizeof(msg) instead of 512.
As you have noted later, it is to populate the static msg to be printed on both
failure and success.
>>
>> errno = 0;
>> - printf("Check failure of execveat(%d, '%s', %d) with %s... ",
>> - fd, path?:"(null)", flags, errno_str);
>> rc = execveat_(fd, path, argv, envp, flags);
>>
>> if (rc > 0) {
>> - printf("[FAIL] (unexpected success from execveat(2))\n");
>> + ksft_test_result_fail(msg);
>> + ksft_print_msg("unexpected success from execveat(2)\n");
>
> I think one single message to indicate the test result is desirable as
> opposed to two messages.
The ksft_test_result_fail(msg) prints the test name and increments the
fail counter, then the ksft_print_msg() gives information regarding the
failure.
>
>> return 1;
>> }
>> if (errno != expected_errno) {
>> - printf("[FAIL] (expected errno %d (%s) not %d (%s)\n",
>> + ksft_test_result_fail(msg);
>> + ksft_print_msg("expected errno %d (%s) not %d (%s)\n",
>> expected_errno, strerror(expected_errno),
>> errno, strerror(errno));
>
> Same as above.
>
>> return 1;
>> }
>> - printf("[OK]\n");
>> + ksft_test_result_pass(msg);
>> return 0;
>> }
>>
>> @@ -68,43 +73,48 @@ static int check_execveat_invoked_rc(int fd, const char *path, int flags,
>> int rc;
>> pid_t child;
>> int pathlen = path ? strlen(path) : 0;
>> + char msg[512];
>>
>> if (pathlen > 40)
>> - printf("Check success of execveat(%d, '%.20s...%s', %d)... ",
>> + snprintf(msg, 512, "Check success of execveat(%d, '%.20s...%s', %d)...\n",
>> fd, path, (path + pathlen - 20), flags);
>> else
>> - printf("Check success of execveat(%d, '%s', %d)... ",
>> + snprintf(msg, 512, "Check success of execveat(%d, '%s', %d)...\n",
>> fd, path?:"(null)", flags);
>
> Is there is a need to use snprinf() here? ksft_test_result_fail() does suppoort
> var args now. Also, please use sizeof(msg) instead of 512.
>
>> child = fork();
>> if (child < 0) {
>> - printf("[FAIL] (fork() failed)\n");
>> + ksft_test_result_fail(msg);
>> + ksft_print_msg("fork() failed\n");
>> return 1;
>> }
>> if (child == 0) {
>> /* Child: do execveat(). */
>> rc = execveat_(fd, path, argv, envp, flags);
>> - printf("[FAIL]: execveat() failed, rc=%d errno=%d (%s)\n",
>> + ksft_exit_fail_msg("execveat() failed, rc=%d errno=%d (%s)\n",
>> rc, errno, strerror(errno));
>> exit(1); /* should not reach here */
>> }
>> /* Parent: wait for & check child's exit status. */
>> rc = waitpid(child, &status, 0);
>> if (rc != child) {
>> - printf("[FAIL] (waitpid(%d,...) returned %d)\n", child, rc);
>> + ksft_test_result_fail(msg);
>> + ksft_print_msg("waitpid(%d,...) returned %d\n", child, rc);
>
> I think one single message to indicate the test result is desirable as
> opposed to two messages.
>
>> return 1;
>> }
>> if (!WIFEXITED(status)) {
>> - printf("[FAIL] (child %d did not exit cleanly, status=%08x)\n",
>> + ksft_test_result_fail(msg);
>> + ksft_print_msg("child %d did not exit cleanly, status=%08x\n",
>> child, status);
>
> I think one single message to indicate the test result is desirable as
> opposed to two messages.
>
>> return 1;
>> }
>> if ((WEXITSTATUS(status) != expected_rc) &&
>> (WEXITSTATUS(status) != expected_rc2)) {
>> - printf("[FAIL] (child %d exited with %d not %d nor %d)\n",
>> + ksft_test_result_fail(msg);
>> + ksft_print_msg("child %d exited with %d not %d nor %d\n",
>> child, WEXITSTATUS(status), expected_rc, expected_rc2);
>> return 1;
>> }
>> - printf("[OK]\n");
>> + ksft_test_result_pass(msg);
>
> I see why you are doing snprintf() - looks like you are using the msg buffer.
> That is okay in this case.
>
>> return 0;
>> }
>>
>> @@ -127,7 +137,7 @@ static int open_or_die(const char *filename, int flags)
>> int fd = open(filename, flags);
>>
>> if (fd < 0) {
>> - printf("Failed to open '%s'; "
>> + ksft_exit_fail_msg("Failed to open '%s'; "
>> "check prerequisites are available\n", filename);
>> exit(1);
>> }
>> @@ -180,11 +190,11 @@ static int check_execveat_pathmax(int dot_dfd, const char *src, int is_script)
>> */
>> fd = open(longpath, O_RDONLY);
>> if (fd > 0) {
>> - printf("Invoke copy of '%s' via filename of length %zu:\n",
>> + ksft_print_msg("Invoke copy of '%s' via filename of length %zu:\n",
>> src, strlen(longpath));
>> fail += check_execveat(fd, "", AT_EMPTY_PATH);
>> } else {
>> - printf("Failed to open length %zu filename, errno=%d (%s)\n",
>> + ksft_print_msg("Failed to open length %zu filename, errno=%d (%s)\n",
>> strlen(longpath), errno, strerror(errno));
>> fail++;
>> }
>> @@ -210,6 +220,8 @@ static int check_execveat_pathmax(int dot_dfd, const char *src, int is_script)
>>
>> static int run_tests(void)
>> {
>> + ksft_print_header();
>
> This goes below the declaration block.
Okay.
>
>> +
>> int fail = 0;
>> char *fullname = realpath("execveat", NULL);
>> char *fullname_script = realpath("script", NULL);
>> @@ -238,7 +250,7 @@ static int run_tests(void)
>> errno = 0;
>> execveat_(-1, NULL, NULL, NULL, 0);
>> if (errno == ENOSYS) {
>> - printf("[FAIL] ENOSYS calling execveat - no kernel support?\n");
>> + ksft_print_msg("[FAIL] ENOSYS calling execveat - no kernel support?\n");
>> return 1;
>> }
>>
>> @@ -247,115 +259,115 @@ static int run_tests(void)
>>
>> /* Normal executable file: */
>> /* dfd + path */
>> - fail += check_execveat(subdir_dfd, "../execveat", 0);
>> - fail += check_execveat(dot_dfd, "execveat", 0);
>> - fail += check_execveat(dot_dfd_path, "execveat", 0);
>> + check_execveat(subdir_dfd, "../execveat", 0);
>> + check_execveat(dot_dfd, "execveat", 0);
>> + check_execveat(dot_dfd_path, "execveat", 0);
>> /* absolute path */
>> - fail += check_execveat(AT_FDCWD, fullname, 0);
>> + check_execveat(AT_FDCWD, fullname, 0);
>> /* absolute path with nonsense dfd */
>> - fail += check_execveat(99, fullname, 0);
>> + check_execveat(99, fullname, 0);
>> /* fd + no path */
>> - fail += check_execveat(fd, "", AT_EMPTY_PATH);
>> + check_execveat(fd, "", AT_EMPTY_PATH);
>> /* O_CLOEXEC fd + no path */
>> - fail += check_execveat(fd_cloexec, "", AT_EMPTY_PATH);
>> + check_execveat(fd_cloexec, "", AT_EMPTY_PATH);
>> /* O_PATH fd */
>> - fail += check_execveat(fd_path, "", AT_EMPTY_PATH);
>> + check_execveat(fd_path, "", AT_EMPTY_PATH);
>>
>> /* Mess with executable file that's already open: */
>> /* fd + no path to a file that's been renamed */
>> rename("execveat.ephemeral", "execveat.moved");
>> - fail += check_execveat(fd_ephemeral, "", AT_EMPTY_PATH);
>> + check_execveat(fd_ephemeral, "", AT_EMPTY_PATH);
>> /* fd + no path to a file that's been deleted */
>> unlink("execveat.moved"); /* remove the file now fd open */
>> - fail += check_execveat(fd_ephemeral, "", AT_EMPTY_PATH);
>> + check_execveat(fd_ephemeral, "", AT_EMPTY_PATH);
>>
>> /* Mess with executable file that's already open with O_PATH */
>> /* fd + no path to a file that's been deleted */
>> unlink("execveat.path.ephemeral");
>> - fail += check_execveat(fd_ephemeral_path, "", AT_EMPTY_PATH);
>> + check_execveat(fd_ephemeral_path, "", AT_EMPTY_PATH);
>>
>> /* Invalid argument failures */
>> - fail += check_execveat_fail(fd, "", 0, ENOENT);
>> - fail += check_execveat_fail(fd, NULL, AT_EMPTY_PATH, EFAULT);
>> + check_execveat_fail(fd, "", 0, ENOENT);
>> + check_execveat_fail(fd, NULL, AT_EMPTY_PATH, EFAULT);
>>
>> /* Symlink to executable file: */
>> /* dfd + path */
>> - fail += check_execveat(dot_dfd, "execveat.symlink", 0);
>> - fail += check_execveat(dot_dfd_path, "execveat.symlink", 0);
>> + check_execveat(dot_dfd, "execveat.symlink", 0);
>> + check_execveat(dot_dfd_path, "execveat.symlink", 0);
>> /* absolute path */
>> - fail += check_execveat(AT_FDCWD, fullname_symlink, 0);
>> + check_execveat(AT_FDCWD, fullname_symlink, 0);
>> /* fd + no path, even with AT_SYMLINK_NOFOLLOW (already followed) */
>> - fail += check_execveat(fd_symlink, "", AT_EMPTY_PATH);
>> - fail += check_execveat(fd_symlink, "",
>> + check_execveat(fd_symlink, "", AT_EMPTY_PATH);
>> + check_execveat(fd_symlink, "",
>> AT_EMPTY_PATH|AT_SYMLINK_NOFOLLOW);
>>
>> /* Symlink fails when AT_SYMLINK_NOFOLLOW set: */
>> /* dfd + path */
>> - fail += check_execveat_fail(dot_dfd, "execveat.symlink",
>> + check_execveat_fail(dot_dfd, "execveat.symlink",
>> AT_SYMLINK_NOFOLLOW, ELOOP);
>> - fail += check_execveat_fail(dot_dfd_path, "execveat.symlink",
>> + check_execveat_fail(dot_dfd_path, "execveat.symlink",
>> AT_SYMLINK_NOFOLLOW, ELOOP);
>> /* absolute path */
>> - fail += check_execveat_fail(AT_FDCWD, fullname_symlink,
>> + check_execveat_fail(AT_FDCWD, fullname_symlink,
>> AT_SYMLINK_NOFOLLOW, ELOOP);
>>
>> /* Shell script wrapping executable file: */
>> /* dfd + path */
>> - fail += check_execveat(subdir_dfd, "../script", 0);
>> - fail += check_execveat(dot_dfd, "script", 0);
>> - fail += check_execveat(dot_dfd_path, "script", 0);
>> + check_execveat(subdir_dfd, "../script", 0);
>> + check_execveat(dot_dfd, "script", 0);
>> + check_execveat(dot_dfd_path, "script", 0);
>> /* absolute path */
>> - fail += check_execveat(AT_FDCWD, fullname_script, 0);
>> + check_execveat(AT_FDCWD, fullname_script, 0);
>> /* fd + no path */
>> - fail += check_execveat(fd_script, "", AT_EMPTY_PATH);
>> - fail += check_execveat(fd_script, "",
>> + check_execveat(fd_script, "", AT_EMPTY_PATH);
>> + check_execveat(fd_script, "",
>> AT_EMPTY_PATH|AT_SYMLINK_NOFOLLOW);
>> /* O_CLOEXEC fd fails for a script (as script file inaccessible) */
>> - fail += check_execveat_fail(fd_script_cloexec, "", AT_EMPTY_PATH,
>> + check_execveat_fail(fd_script_cloexec, "", AT_EMPTY_PATH,
>> ENOENT);
>> - fail += check_execveat_fail(dot_dfd_cloexec, "script", 0, ENOENT);
>> + check_execveat_fail(dot_dfd_cloexec, "script", 0, ENOENT);
>>
>> /* Mess with script file that's already open: */
>> /* fd + no path to a file that's been renamed */
>> rename("script.ephemeral", "script.moved");
>> - fail += check_execveat(fd_script_ephemeral, "", AT_EMPTY_PATH);
>> + check_execveat(fd_script_ephemeral, "", AT_EMPTY_PATH);
>> /* fd + no path to a file that's been deleted */
>> unlink("script.moved"); /* remove the file while fd open */
>> - fail += check_execveat(fd_script_ephemeral, "", AT_EMPTY_PATH);
>> + check_execveat(fd_script_ephemeral, "", AT_EMPTY_PATH);
>>
>> /* Rename a subdirectory in the path: */
>> rename("subdir.ephemeral", "subdir.moved");
>> - fail += check_execveat(subdir_dfd_ephemeral, "../script", 0);
>> - fail += check_execveat(subdir_dfd_ephemeral, "script", 0);
>> + check_execveat(subdir_dfd_ephemeral, "../script", 0);
>> + check_execveat(subdir_dfd_ephemeral, "script", 0);
>> /* Remove the subdir and its contents */
>> unlink("subdir.moved/script");
>> unlink("subdir.moved");
>> /* Shell loads via deleted subdir OK because name starts with .. */
>> - fail += check_execveat(subdir_dfd_ephemeral, "../script", 0);
>> - fail += check_execveat_fail(subdir_dfd_ephemeral, "script", 0, ENOENT);
>> + check_execveat(subdir_dfd_ephemeral, "../script", 0);
>> + check_execveat_fail(subdir_dfd_ephemeral, "script", 0, ENOENT);
>>
>> /* Flag values other than AT_SYMLINK_NOFOLLOW => EINVAL */
>> - fail += check_execveat_fail(dot_dfd, "execveat", 0xFFFF, EINVAL);
>> + check_execveat_fail(dot_dfd, "execveat", 0xFFFF, EINVAL);
>> /* Invalid path => ENOENT */
>> - fail += check_execveat_fail(dot_dfd, "no-such-file", 0, ENOENT);
>> - fail += check_execveat_fail(dot_dfd_path, "no-such-file", 0, ENOENT);
>> - fail += check_execveat_fail(AT_FDCWD, "no-such-file", 0, ENOENT);
>> + check_execveat_fail(dot_dfd, "no-such-file", 0, ENOENT);
>> + check_execveat_fail(dot_dfd_path, "no-such-file", 0, ENOENT);
>> + check_execveat_fail(AT_FDCWD, "no-such-file", 0, ENOENT);
>> /* Attempt to execute directory => EACCES */
>> fail += check_execveat_fail(dot_dfd, "", AT_EMPTY_PATH, EACCES);
>> /* Attempt to execute non-executable => EACCES */
>> - fail += check_execveat_fail(dot_dfd, "Makefile", 0, EACCES);
>> - fail += check_execveat_fail(fd_denatured, "", AT_EMPTY_PATH, EACCES);
>> - fail += check_execveat_fail(fd_denatured_path, "", AT_EMPTY_PATH,
>> + check_execveat_fail(dot_dfd, "Makefile", 0, EACCES);
>> + check_execveat_fail(fd_denatured, "", AT_EMPTY_PATH, EACCES);
>> + check_execveat_fail(fd_denatured_path, "", AT_EMPTY_PATH,
>> EACCES);
>> /* Attempt to execute nonsense FD => EBADF */
>> - fail += check_execveat_fail(99, "", AT_EMPTY_PATH, EBADF);
>> - fail += check_execveat_fail(99, "execveat", 0, EBADF);
>> + check_execveat_fail(99, "", AT_EMPTY_PATH, EBADF);
>> + check_execveat_fail(99, "execveat", 0, EBADF);
>> /* Attempt to execute relative to non-directory => ENOTDIR */
>> - fail += check_execveat_fail(fd, "execveat", 0, ENOTDIR);
>> + check_execveat_fail(fd, "execveat", 0, ENOTDIR);
>>
>> - fail += check_execveat_pathmax(dot_dfd, "execveat", 0);
>> - fail += check_execveat_pathmax(dot_dfd, "script", 1);
>> - return fail;
>> + check_execveat_pathmax(dot_dfd, "execveat", 0);
>> + check_execveat_pathmax(dot_dfd, "script", 1);
>> + return ksft_get_fail_cnt();
>> }
>>
>> static void prerequisites(void)
>> @@ -405,8 +417,10 @@ int main(int argc, char **argv)
>> if (verbose)
>> envp[1] = "VERBOSE=1";
>> rc = run_tests();
>> - if (rc > 0)
>> - printf("%d tests failed\n", rc);
>> + if (rc)
>> + ksft_exit_fail();
>> + else
>> + ksft_exit_pass();
>> }
>> return rc;
>> }
>>
>
> Looks like main() still needs some changes for:
> if (!in_test || strcmp(in_test, "yes") != 0) {
>
> case.
Yes, it does. Looks like I missed it.
Thank you,
Paul
>
> thanks,
> -- Shuah
>
Powered by blists - more mailing lists