88 lines
2.5 KiB
C
88 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) Wipro Technologies Ltd, 2002. All Rights Reserved.
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* Author: Saji Kumar.V.R <saji.kumar@wipro.com>
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*
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* Tests basic error handling of the capget syscall.
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* 1) capget() fails with errno set to EFAULT if an invalid address
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* is given for header.
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* 2) capget() fails with errno set to EFAULT if an invalid address
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* is given for data
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* 3) capget() fails with errno set to EINVAL if an invalid value
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* is given for header->version
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* 4) capget() fails with errno set to EINVAL if header->pid < 0
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* 5) capget() fails with errno set to ESRCH if the process with
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* pid, header->pid does not exist.
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*/
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#include <sys/types.h>
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#include "tst_test.h"
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#include "lapi/syscalls.h"
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#include <linux/capability.h>
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static pid_t unused_pid;
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static struct __user_cap_header_struct *header;
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static struct __user_cap_data_struct *data, *bad_data;
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static struct tcase {
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int version;
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int pid;
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int exp_err;
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int flag;
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char *message;
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} tcases[] = {
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{0x20080522, 0, EFAULT, 1, "bad address header"},
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{0x20080522, 0, EFAULT, 2, "bad address data"},
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{0, 0, EINVAL, 0, "bad version"},
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{0x20080522, -1, EINVAL, 0, "bad pid"},
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{0x20080522, 1, ESRCH, 0, "unused pid"},
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};
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static void verify_capget(unsigned int n)
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{
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struct tcase *tc = &tcases[n];
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header->version = tc->version;
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if (tc->pid == 1)
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header->pid = unused_pid;
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else
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header->pid = tc->pid;
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/*
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* header must not be NULL. data may be NULL only when the user is
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* trying to determine the preferred capability version format
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* supported by the kernel. So use tst_get_bad_addr() to get
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* this error.
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*/
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TST_EXP_FAIL(tst_syscall(__NR_capget, tc->flag - 1 ? header : NULL,
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tc->flag - 2 ? data : bad_data),
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tc->exp_err, "capget() with %s", tc->message);
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/*
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* When an unsupported version value is specified, it will
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* return the kernel preferred value of _LINUX_CAPABILITY_VERSION_?.
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* Since linux 2.6.26, version 3 is default. We use it.
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*/
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if (header->version != 0x20080522)
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tst_res(TFAIL, "kernel doesn't return preferred linux"
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" capability version when using bad version");
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}
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static void setup(void)
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{
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unused_pid = tst_get_unused_pid();
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bad_data = tst_get_bad_addr(NULL);
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}
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static struct tst_test test = {
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.setup = setup,
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.tcnt = ARRAY_SIZE(tcases),
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.test = verify_capget,
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.bufs = (struct tst_buffers []) {
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{&header, .size = sizeof(*header)},
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{&data, .size = 2 * sizeof(*data)},
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{&bad_data, .size = 2 * sizeof(*data)},
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{},
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}
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};
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