94 lines
1.8 KiB
C
94 lines
1.8 KiB
C
/*
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* Check decoding of setresuid/setresgid/setresuid32/setresgid32 syscalls.
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*
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* Copyright (c) 2016-2018 Dmitry V. Levin <ldv@altlinux.org>
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* All rights reserved.
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include <errno.h>
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#include <stdio.h>
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#include <unistd.h>
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static int
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ugid2int(const unsigned UGID_TYPE ugid)
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{
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if ((unsigned UGID_TYPE) -1U == ugid)
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return -1;
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else
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return ugid;
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}
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static void
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print_int(const unsigned int num)
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{
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if (num == -1U)
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printf("-1");
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else
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printf("%u", num);
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}
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static int
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num_matches_id(const unsigned int num, const unsigned int ugid)
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{
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return num == ugid || num == -1U;
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}
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#define TRIPLE(val) \
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{ val, ugid, ugid }, { ugid, val, ugid }, { ugid, ugid, val }
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int
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main(void)
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{
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unsigned int ugid = GETUGID;
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CHECK_OVERFLOWUGID(ugid);
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const struct {
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const long r, e, s;
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} tests[] = {
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{ ugid, ugid, ugid },
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TRIPLE((unsigned long) 0xffffffff00000000ULL | ugid),
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TRIPLE(-1U),
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TRIPLE(-1L),
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TRIPLE(0xffff0000U | ugid),
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TRIPLE(0xffff),
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TRIPLE(0xc0deffffU)
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};
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unsigned int i;
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for (i = 0; i < ARRAY_SIZE(tests); ++i) {
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const unsigned int rn = ugid2int(tests[i].r);
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const unsigned int en = ugid2int(tests[i].e);
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const unsigned int sn = ugid2int(tests[i].s);
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if (!num_matches_id(rn, ugid) ||
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!num_matches_id(en, ugid) ||
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!num_matches_id(sn, ugid))
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continue;
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if (syscall(SYSCALL_NR, tests[i].r, tests[i].e, tests[i].s)) {
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if (!i && ENOSYS == errno) {
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printf("%s(%u, %u, %u) = -1 ENOSYS (%m)\n",
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SYSCALL_NAME, ugid, ugid, ugid);
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break;
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}
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perror_msg_and_fail("%s(%#lx, %#lx, %#lx)",
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SYSCALL_NAME,
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tests[i].r, tests[i].e, tests[i].s);
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}
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printf("%s(", SYSCALL_NAME);
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print_int(rn);
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printf(", ");
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print_int(en);
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printf(", ");
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print_int(sn);
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printf(") = 0\n");
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}
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puts("+++ exited with 0 +++");
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return 0;
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}
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