[LTP] [PATCH] request_key: Add negative tests for request_key

[Petr Vorel]

Hi Ma, Eric, all,

> Add negative tests for request_key(), when errno is EFAULT or EPERM

LGTM, thanks!
Reviewed-by: Petr Vorel <pvorel@suse.cz>

We also somehow test EACCES (request_key04.c). Looking into man page, there are
other interesting errno to test I suppose (EDQUOT, EKEYEXPIRED, EKEYREJECTED,
...)

@Eric, other devs, would you have time to have a quick look on the test?

Kind regards,
Petr

> Signed-off-by: Ma Xinjian <maxj.fnst@fujitsu.com>
> ---
>  runtest/syscalls                              |  1 +
>  .../kernel/syscalls/request_key/.gitignore    |  1 +
>  .../syscalls/request_key/request_key06.c      | 52 +++++++++++++++++++
>  3 files changed, 54 insertions(+)
>  create mode 100644 testcases/kernel/syscalls/request_key/request_key06.c

> diff --git a/runtest/syscalls b/runtest/syscalls
> index 3a28123a5..c04359fcd 100644
> --- a/runtest/syscalls
> +++ b/runtest/syscalls
> @@ -1187,6 +1187,7 @@ request_key02 request_key02
>  request_key03 request_key03
>  request_key04 request_key04
>  request_key05 request_key05
> +request_key06 request_key06

>  rmdir01 rmdir01
>  rmdir02 rmdir02
> diff --git a/testcases/kernel/syscalls/request_key/.gitignore b/testcases/kernel/syscalls/request_key/.gitignore
> index e8dc1c570..6dcf613c7 100644
> --- a/testcases/kernel/syscalls/request_key/.gitignore
> +++ b/testcases/kernel/syscalls/request_key/.gitignore
> @@ -3,3 +3,4 @@
>  /request_key03
>  /request_key04
>  /request_key05
> +/request_key06
> diff --git a/testcases/kernel/syscalls/request_key/request_key06.c b/testcases/kernel/syscalls/request_key/request_key06.c
> new file mode 100644
> index 000000000..bd872867b
> --- /dev/null
> +++ b/testcases/kernel/syscalls/request_key/request_key06.c
> @@ -0,0 +1,52 @@
> +// SPDX-License-Identifier: GPL-2.0-or-later
> +/*
> + * Copyright (c) 2024 FUJITSU LIMITED. All Rights Reserved.
> + * Author: Ma Xinjian <maxj.fnst@fujitsu.com>
> + */
> +
> +/*\
> + * [Description]
> + *
> + * Verify that request_key(2) fails with
> + *
> + * - EFAULT when type points outside the process's accessible address space
> + * - EFAULT when description points outside the process's accessible address space
> + * - EFAULT when callout_info points outside the process's accessible address space
> + * - EPERM when type argument started with a period '.'
> + */
> +
> +#include "tst_test.h"
> +#include "lapi/keyctl.h"
> +
> +static struct test_case_t {
> +	char *type;
> +	char *description;
> +	char *callout_info;
> +	key_serial_t dest_keyring;
> +	int expected_errno;
> +	char *desc;
> +} tcases[] = {
> +	{(char *)(-1), "description", NULL, KEY_SPEC_PROCESS_KEYRING, EFAULT,
> +		"type points outside the process's accessible address space"},
> +	{"type", (char *)(-1), NULL, KEY_SPEC_PROCESS_KEYRING, EFAULT,
> +		"description points outside the process's accessible address space"},
> +	{"type", "description", (char *)(-1), KEY_SPEC_PROCESS_KEYRING, EFAULT,
> +		"callout_info points outside the process's accessible address space"},
> +	{".type", "description", NULL, KEY_SPEC_PROCESS_KEYRING, EPERM,
> +		"type argument started with a period '.'"},
> +};
> +
> +static void verify_request_key(unsigned int i)
> +{
> +	struct test_case_t *tc = &tcases[i];
> +
> +	TST_EXP_FAIL2(request_key(tc->type, tc->description, tc->callout_info,
> +		tc->dest_keyring),
> +		tc->expected_errno,
> +		"%s", tc->desc);
> +}
> +
> +static struct tst_test test = {
> +	.tcnt = ARRAY_SIZE(tcases),
> +	.test = verify_request_key,
> +};