Dmitry V. Levin
62a35fa572
We used to call tail_alloc(1) to create memory mapping holes around regular tail_alloc allocations. This is no longer needed since regular tail_alloc allocations create additional memory mapping holes. * tests/clock_adjtime.c (main): Remove creation of memory mapping holes using tail_alloc(1). * tests/futimesat.c (main): Likewise. * tests/get_mempolicy.c (print_nodes, main): Likewise. * tests/getgroups.c (main): Likewise. * tests/getresugid.c (main): Likewise. * tests/ioctl_uffdio.c (main): Likewise. * tests/ioctl_v4l2.c (main): Likewise. * tests/move_pages.c (main): Likewise. * tests/net-icmp_filter.c (main): Likewise. * tests/ptrace.c (test_peeksiginfo, main): Likewise. * tests/pwritev.c (main): Likewise. * tests/set_mempolicy.c (print_nodes): Likewise. * tests/setgroups.c (main): Likewise. * tests/umovestr3.c (main): Likewise. * tests/utimes.c (main): Likewise. * tests/xattr.c (main): Likewise.
149 lines
4.2 KiB
C
149 lines
4.2 KiB
C
/*
|
|
* Check decoding of getgroups/getgroups32 syscalls.
|
|
*
|
|
* Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifdef __NR_getgroups32
|
|
|
|
# define SYSCALL_NR __NR_getgroups32
|
|
# define SYSCALL_NAME "getgroups32"
|
|
# define GID_TYPE unsigned int
|
|
|
|
#else
|
|
|
|
# include "tests.h"
|
|
# include <sys/syscall.h>
|
|
|
|
# ifdef __NR_getgroups
|
|
|
|
# define SYSCALL_NR __NR_getgroups
|
|
# define SYSCALL_NAME "getgroups"
|
|
# if defined __NR_getgroups32 && __NR_getgroups != __NR_getgroups32
|
|
# define GID_TYPE unsigned short
|
|
# else
|
|
# define GID_TYPE unsigned int
|
|
# endif
|
|
|
|
# endif
|
|
|
|
#endif
|
|
|
|
#ifdef GID_TYPE
|
|
|
|
# include <stdio.h>
|
|
# include <unistd.h>
|
|
|
|
#define MAX_STRLEN 32
|
|
static long ngroups;
|
|
|
|
static void
|
|
get_groups(const long size, GID_TYPE *const g)
|
|
{
|
|
long i = syscall(SYSCALL_NR, size, g);
|
|
if (i != ngroups)
|
|
perror_msg_and_fail("%s(%#lx, %p)", SYSCALL_NAME, size, g);
|
|
|
|
printf("%s(%u, [", SYSCALL_NAME, (unsigned) size);
|
|
for (i = 0; i < ngroups; ++i) {
|
|
if (i)
|
|
printf(", ");
|
|
if (i >= MAX_STRLEN) {
|
|
printf("...");
|
|
break;
|
|
}
|
|
printf("%u", (unsigned int) g[i]);
|
|
}
|
|
printf("]) = %ld\n", ngroups);
|
|
}
|
|
|
|
int
|
|
main(void)
|
|
{
|
|
long rc;
|
|
|
|
/* check how the first argument is decoded */
|
|
ngroups = syscall(SYSCALL_NR, 0, 0);
|
|
printf("%s(0, NULL) = %ld\n", SYSCALL_NAME, ngroups);
|
|
if (ngroups < 0)
|
|
perror_msg_and_fail(SYSCALL_NAME);
|
|
|
|
rc = syscall(SYSCALL_NR, (long) 0xffffffff00000000ULL, 0);
|
|
printf("%s(0, NULL) = %ld\n", SYSCALL_NAME, rc);
|
|
|
|
rc = syscall(SYSCALL_NR, -1U, 0);
|
|
printf("%s(%u, NULL) = %ld %s (%m)\n",
|
|
SYSCALL_NAME, -1U, rc, errno2name());
|
|
|
|
rc = syscall(SYSCALL_NR, -1L, 0);
|
|
printf("%s(%u, NULL) = %ld %s (%m)\n",
|
|
SYSCALL_NAME, -1U, rc, errno2name());
|
|
|
|
const unsigned int ngroups_max = sysconf(_SC_NGROUPS_MAX);
|
|
|
|
rc = syscall(SYSCALL_NR, ngroups_max, 0);
|
|
if (rc < 0)
|
|
printf("%s(%u, NULL) = %ld %s (%m)\n",
|
|
SYSCALL_NAME, ngroups_max, rc, errno2name());
|
|
else
|
|
printf("%s(%u, NULL) = %ld\n",
|
|
SYSCALL_NAME, ngroups_max, rc);
|
|
|
|
rc = syscall(SYSCALL_NR, (long) 0xffffffff00000000ULL | ngroups_max, 0);
|
|
if (rc < 0)
|
|
printf("%s(%u, NULL) = %ld %s (%m)\n",
|
|
SYSCALL_NAME, ngroups_max, rc, errno2name());
|
|
else
|
|
printf("%s(%u, NULL) = %ld\n",
|
|
SYSCALL_NAME, ngroups_max, rc);
|
|
|
|
/* check how the second argument is decoded */
|
|
GID_TYPE *const g1 =
|
|
tail_alloc(ngroups ? sizeof(*g1) * ngroups : 1);
|
|
GID_TYPE *const g2 = tail_alloc(sizeof(*g2) * (ngroups + 1));
|
|
void *efault = g2 + ngroups + 1;
|
|
|
|
get_groups(ngroups, g1);
|
|
get_groups(ngroups + 1, g1);
|
|
get_groups(ngroups + 1, g2);
|
|
|
|
if (ngroups) {
|
|
rc = syscall(SYSCALL_NR, ngroups, efault);
|
|
printf("%s(%u, %p) = %ld %s (%m)\n",
|
|
SYSCALL_NAME, (unsigned) ngroups, efault,
|
|
rc, errno2name());
|
|
}
|
|
|
|
puts("+++ exited with 0 +++");
|
|
return 0;
|
|
}
|
|
|
|
#else
|
|
|
|
SKIP_MAIN_UNDEFINED("__NR_getgroups")
|
|
|
|
#endif
|