/*
|
* Check decoding of setresuid/setresgid/setresuid32/setresgid32 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.
|
*/
|
|
#include <errno.h>
|
#include <stdio.h>
|
#include <unistd.h>
|
|
static int
|
ugid2int(const unsigned UGID_TYPE ugid)
|
{
|
if ((unsigned UGID_TYPE) -1U == ugid)
|
return -1;
|
else
|
return ugid;
|
}
|
|
static void
|
print_int(const unsigned int num)
|
{
|
if (num == -1U)
|
printf("-1");
|
else
|
printf("%u", num);
|
}
|
|
static int
|
num_matches_id(const unsigned int num, const unsigned int ugid)
|
{
|
return num == ugid || num == -1U;
|
}
|
|
#define TRIPLE(val) \
|
{ val, ugid, ugid }, { ugid, val, ugid }, { ugid, ugid, val }
|
|
int
|
main(void)
|
{
|
unsigned int ugid = GETUGID;
|
CHECK_OVERFLOWUGID(ugid);
|
|
const struct {
|
const long r, e, s;
|
} tests[] = {
|
{ ugid, ugid, ugid },
|
TRIPLE((unsigned long) 0xffffffff00000000ULL | ugid),
|
TRIPLE(-1U),
|
TRIPLE(-1L),
|
TRIPLE(0xffff0000U | ugid),
|
TRIPLE(0xffff),
|
TRIPLE(0xc0deffffU)
|
};
|
|
unsigned int i;
|
|
for (i = 0; i < ARRAY_SIZE(tests); ++i) {
|
const unsigned int rn = ugid2int(tests[i].r);
|
const unsigned int en = ugid2int(tests[i].e);
|
const unsigned int sn = ugid2int(tests[i].s);
|
|
if (!num_matches_id(rn, ugid) ||
|
!num_matches_id(en, ugid) ||
|
!num_matches_id(sn, ugid))
|
continue;
|
|
if (syscall(SYSCALL_NR, tests[i].r, tests[i].e, tests[i].s)) {
|
if (!i && ENOSYS == errno) {
|
printf("%s(%u, %u, %u) = -1 ENOSYS (%m)\n",
|
SYSCALL_NAME, ugid, ugid, ugid);
|
break;
|
}
|
perror_msg_and_fail("%s(%#lx, %#lx, %#lx)",
|
SYSCALL_NAME,
|
tests[i].r, tests[i].e, tests[i].s);
|
}
|
|
printf("%s(", SYSCALL_NAME);
|
print_int(rn);
|
printf(", ");
|
print_int(en);
|
printf(", ");
|
print_int(sn);
|
printf(") = 0\n");
|
}
|
|
puts("+++ exited with 0 +++");
|
return 0;
|
}
|
