107 lines
3.2 KiB
C
107 lines
3.2 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 capset syscall.
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* 1) capset() fails with errno set to EFAULT if an invalid address
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* is given for header.
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* 2) capset() fails with errno set to EFAULT if an invalid address
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* is given for data.
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* 3) capset() fails with errno set to EINVAL if an invalid value
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* is given for header->version.
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* 4) capset() fails with errno set to EPERM if the new_Effective is
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* not a subset of the new_Permitted.
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* 5) capset() fails with errno set to EPERM if the new_Permitted is
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* not a subset of the old_Permitted.
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* 6) capset() fails with errno set ot EPERM if the new_Inheritable is
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* not a subset of the old_Inheritable and bounding set.
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*/
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#include <stdlib.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <sys/prctl.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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#define CAP1 (1 << CAP_NET_RAW | 1 << CAP_CHOWN | 1 << CAP_SETPCAP)
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#define CAP2 (CAP1 | 1 << CAP_KILL)
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static struct __user_cap_header_struct *header;
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static struct __user_cap_data_struct *data;
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static void *bad_addr;
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static struct tcase {
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int version;
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int pid;
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int effective;
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int permitted;
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int inheritable;
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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, CAP1, CAP1, CAP1, EFAULT, 1, "bad address header"},
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{0x20080522, 0, CAP1, CAP1, CAP1, EFAULT, 2, "bad address data"},
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{0, 0, CAP1, CAP1, CAP1, EINVAL, 0, "bad version"},
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{0x20080522, 0, CAP2, CAP1, CAP1, EPERM, 0, "bad value data(when pE is not in pP)"},
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{0x20080522, 0, CAP1, CAP2, CAP1, EPERM, 0, "bad value data(when pP is not in old pP)"},
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{0x20080522, 0, CAP1, CAP1, CAP2, EPERM, 0, "bad value data(when pI is not in bounding set or old pI)"},
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};
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static void verify_capset(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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header->pid = tc->pid;
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data->effective = tc->effective;
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data->permitted = tc->permitted;
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data->inheritable = tc->inheritable;
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TST_EXP_FAIL(tst_syscall(__NR_capset, tc->flag - 1 ? header : bad_addr,
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tc->flag - 2 ? data : bad_addr),
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tc->exp_err, "capset() 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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header->version = 0x20080522;
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data->effective = CAP1;
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data->permitted = CAP1;
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data->inheritable = CAP1;
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TEST(tst_syscall(__NR_capset, header, data));
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if (TST_RET == -1)
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tst_brk(TBROK | TTERRNO, "capset data failed");
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TEST(prctl(PR_CAPBSET_DROP, CAP_KILL));
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if (TST_RET == -1)
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tst_brk(TBROK | TTERRNO, "drop CAP_KILL failed");
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bad_addr = 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_capset,
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.needs_root = 1,
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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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{},
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}
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};
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