[LTP] [PATCH v3 2/2] fanotify14: fix anonymous pipe testcases

[Amir Goldstein]

On Wed, Mar 20, 2024 at 8:32 AM Petr Vorel <pvorel@suse.cz> wrote:
>
> From: Mete Durlu <meted@linux.ibm.com>
>
> When SElinux is in enforcing state and SEpolicies disallow anonymous
> pipe usage with fanotify_mark(), related fanotify14 testcases fail with
> EACCES instead of EINVAL. Accept both errnos when SElinux is in
> enforcing state to correctly evaluate test results.
>
> Replace TST_EXP_FD_OR_FAIL with TST_EXP_FAIL when testing
> fanotify_mark() as it returns -1 on failure and 0 on success not a file
> descriptor.
>
> Co-developed-by: Petr Vorel <pvorel@suse.cz>
> Signed-off-by: Mete Durlu <meted@linux.ibm.com>
> Signed-off-by: Petr Vorel <pvorel@suse.cz>

Reviewed-by: Amir Goldstein <amir73il@gmail.com>

> ---
> Hi,
>
> this is a replacement of Mete's v2 fanotify14: fix anonymous pipe testcases:
> https://lore.kernel.org/ltp/20240312120829.178305-2-meted@linux.ibm.com/
>
> Kind regards,
> Petr
>
>  .../kernel/syscalls/fanotify/fanotify14.c     | 19 ++++++++++++++++---
>  1 file changed, 16 insertions(+), 3 deletions(-)
>
> diff --git a/testcases/kernel/syscalls/fanotify/fanotify14.c b/testcases/kernel/syscalls/fanotify/fanotify14.c
> index d02d81495..b554af22a 100644
> --- a/testcases/kernel/syscalls/fanotify/fanotify14.c
> +++ b/testcases/kernel/syscalls/fanotify/fanotify14.c
> @@ -30,6 +30,7 @@
>
>  #ifdef HAVE_SYS_FANOTIFY_H
>  #include "fanotify.h"
> +#include "tst_selinux.h"
>
>  #define MNTPOINT "mntpoint"
>  #define FILE1 MNTPOINT"/file1"
> @@ -47,6 +48,7 @@ static int pipes[2] = {-1, -1};
>  static int fanotify_fd;
>  static int ignore_mark_unsupported;
>  static int filesystem_mark_unsupported;
> +static int se_enforcing;
>  static unsigned int supported_init_flags;
>
>  struct test_case_flags_t {
> @@ -283,9 +285,18 @@ static void do_test(unsigned int number)
>
>         tst_res(TINFO, "Testing %s with %s",
>                 tc->mark.desc, tc->mask.desc);
> -       TST_EXP_FD_OR_FAIL(fanotify_mark(fanotify_fd, FAN_MARK_ADD | tc->mark.flags,
> -                                        tc->mask.flags, dirfd, path),
> -                                        tc->expected_errno);
> +
> +       if (tc->pfd && se_enforcing) {
> +               const int exp_errs[] = {tc->expected_errno, EACCES};
> +
> +               TST_EXP_FAIL_ARR(fanotify_mark(fanotify_fd, FAN_MARK_ADD | tc->mark.flags,
> +                                tc->mask.flags, dirfd, path),
> +                                exp_errs);
> +       } else {
> +               TST_EXP_FAIL(fanotify_mark(fanotify_fd, FAN_MARK_ADD | tc->mark.flags,
> +                                                tc->mask.flags, dirfd, path),
> +                                                tc->expected_errno);
> +       }
>
>         /*
>          * ENOTDIR are errors for events/flags not allowed on a non-dir inode.
> @@ -334,6 +345,8 @@ static void do_setup(void)
>         SAFE_FILE_PRINTF(FILE1, "0");
>         /* Create anonymous pipes to place marks on */
>         SAFE_PIPE2(pipes, O_CLOEXEC);
> +
> +       se_enforcing = tst_selinux_enforcing();
>  }
>
>  static void do_cleanup(void)
> --
> 2.43.0
>