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/*
* Check decoding of prctl operations without arguments and return code parsing:
* PR_GET_KEEPCAPS, PR_GET_SECCOMP, PR_GET_TIMERSLACK, PR_GET_TIMING,
* PR_TASK_PERF_EVENTS_DISABLE, and PR_TASK_PERF_EVENTS_ENABLE.
* Also check decoding of prctl operations that check arguments they do not use
* for zero equality and don't have any presentable semantics for the arguments
* they use and the return code: PR_GET_NO_NEW_PRIVS, PR_GET_THP_DISABLE,
* PR_MPX_DISABLE_MANAGEMENT, PR_MPX_ENABLE_MANAGEMENT, PR_GET_IO_FLUSHER,
* PR_GET_MEMORY_MERGE, PR_SET_MEMORY_MERGE, and unknown operations.
*
* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
* Copyright (c) 2016-2024 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <linux/prctl.h>
#ifdef INJECT_RETVAL
# define INJ_STR " (INJECTED)"
#else
# define INJ_STR ""
#endif
int
main(int argc, char *argv[])
{
static const kernel_ulong_t bogus_op_bits =
(kernel_ulong_t) 0xbadc0ded00000000ULL;
static const kernel_ulong_t bogus_arg =
(kernel_ulong_t) 0xfacefeeddeadbeefULL;
static const struct strval32 options[] = {
{ 7, "PR_GET_KEEPCAPS" },
{ 13, "PR_GET_TIMING" },
{ 21, "PR_GET_SECCOMP" },
{ 30, "PR_GET_TIMERSLACK" },
{ 31, "PR_TASK_PERF_EVENTS_DISABLE" },
{ 32, "PR_TASK_PERF_EVENTS_ENABLE" },
};
static const struct strval32 options_checking[] = {
{ 39, "PR_GET_NO_NEW_PRIVS" },
{ 42, "PR_GET_THP_DISABLE" },
#ifdef INJECT_RETVAL /* avoid calling non-getter prctls without -einject= */
{ 43, "PR_MPX_ENABLE_MANAGEMENT" },
{ 44, "PR_MPX_DISABLE_MANAGEMENT" },
#endif /* INJECT_RETVAL */
{ 58, "PR_GET_IO_FLUSHER" },
{ 67, "PR_SET_MEMORY_MERGE" },
{ 68, "PR_GET_MEMORY_MERGE" },
};
static const unsigned int options_unknown[] = {
0, 17, 18, 48, 49, 74, 75, 76,
0x41555855, /* "AUXV" - 1 */
0x41555857, /* "AUXV" + 1 */
0x53564d40, /* "SVMA" - 1 */
0x53564d42, /* "SVMA" + 1 */
0x59616d60, /* "Yama" - 1 */
0x59616d62, /* "Yama" + 1 */
0xffffffff,
};
TAIL_ALLOC_OBJECT_CONST_PTR(unsigned int, ptr);
long rc;
prctl_marker();
#ifdef INJECT_RETVAL
unsigned long num_skip;
long inject_retval;
bool locked = false;
if (argc < 3)
error_msg_and_fail("Usage: %s NUM_SKIP INJECT_RETVAL", argv[0]);
num_skip = strtoul(argv[1], NULL, 0);
inject_retval = strtol(argv[2], NULL, 0);
for (size_t i = 0; i < num_skip; i++) {
if (prctl_marker() != inject_retval)
continue;
locked = true;
break;
}
if (!locked)
error_msg_and_fail("Have not locked on prctl(-1, -2, -3, -4"
", -5) returning %ld", inject_retval);
#endif /* INJECT_RETVAL */
for (const struct strval32 *i = options;
i < options + ARRAY_SIZE(options); i++) {
rc = syscall(__NR_prctl, i->val | bogus_op_bits);
printf("prctl(" XLAT_FMT ") = %s" INJ_STR "\n",
XLAT_SEL(i->val, i->str), sprintrc(rc));
rc = syscall(__NR_prctl, i->val, bogus_arg);
printf("prctl(" XLAT_FMT ") = %s" INJ_STR "\n",
XLAT_SEL(i->val, i->str), sprintrc(rc));
rc = syscall(__NR_prctl, i->val, 0, bogus_arg);
printf("prctl(" XLAT_FMT ") = %s" INJ_STR "\n",
XLAT_SEL(i->val, i->str), sprintrc(rc));
rc = syscall(__NR_prctl, i->val, 0, 0, bogus_arg);
printf("prctl(" XLAT_FMT ") = %s" INJ_STR "\n",
XLAT_SEL(i->val, i->str), sprintrc(rc));
rc = syscall(__NR_prctl, i->val, 0, 0, 0, bogus_arg);
printf("prctl(" XLAT_FMT ") = %s" INJ_STR "\n",
XLAT_SEL(i->val, i->str), sprintrc(rc));
rc = syscall(__NR_prctl, i->val, bogus_arg, bogus_arg + 1,
bogus_arg + 2, bogus_arg + 3);
printf("prctl(" XLAT_FMT ") = %s" INJ_STR "\n",
XLAT_SEL(i->val, i->str), sprintrc(rc));
}
for (const struct strval32 *i = options_checking;
i < options_checking + ARRAY_SIZE(options_checking); i++) {
rc = syscall(__NR_prctl, i->val | bogus_op_bits, 0, 0, 0, 0);
printf("prctl(" XLAT_FMT ", 0, 0, 0, 0) = %s" INJ_STR "\n",
XLAT_SEL(i->val, i->str), sprintrc(rc));
rc = syscall(__NR_prctl, i->val, bogus_arg, 0, 0, 0);
printf("prctl(" XLAT_FMT ", %#llx, 0, 0, 0) = %s" INJ_STR "\n",
XLAT_SEL(i->val, i->str), (unsigned long long) bogus_arg,
sprintrc(rc));
rc = syscall(__NR_prctl, i->val, 0, bogus_arg, 0, 0);
printf("prctl(" XLAT_FMT ", 0, %#llx, 0, 0) = %s" INJ_STR "\n",
XLAT_SEL(i->val, i->str), (unsigned long long) bogus_arg,
sprintrc(rc));
rc = syscall(__NR_prctl, i->val, 0, 0, bogus_arg, 0);
printf("prctl(" XLAT_FMT ", 0, 0, %#llx, 0) = %s" INJ_STR "\n",
XLAT_SEL(i->val, i->str), (unsigned long long) bogus_arg,
sprintrc(rc));
rc = syscall(__NR_prctl, i->val, 0, 0, 0, bogus_arg);
printf("prctl(" XLAT_FMT ", 0, 0, 0, %#llx) = %s" INJ_STR "\n",
XLAT_SEL(i->val, i->str), (unsigned long long) bogus_arg,
sprintrc(rc));
rc = syscall(__NR_prctl, i->val, bogus_arg, bogus_arg + 1,
bogus_arg + 2, bogus_arg + 3);
printf("prctl(" XLAT_FMT ", %#llx, %#llx, %#llx, %#llx) = %s"
INJ_STR "\n",
XLAT_SEL(i->val, i->str),
(unsigned long long) bogus_arg,
(unsigned long long) bogus_arg + 1,
(unsigned long long) bogus_arg + 2,
(unsigned long long) bogus_arg + 3,
sprintrc(rc));
}
for (const unsigned int *i = options_unknown;
i < options_unknown + ARRAY_SIZE(options_unknown); i++) {
rc = syscall(__NR_prctl, *i | bogus_op_bits, 0, 0, 0, 0);
printf("prctl(%#x" NRAW(" /* PR_??? */") ", 0, 0, 0, 0) = %s"
INJ_STR "\n",
*i, sprintrc(rc));
rc = syscall(__NR_prctl, *i, bogus_arg, 0, 0, 0);
printf("prctl(%#x" NRAW(" /* PR_??? */")
", %#llx, 0, 0, 0) = %s" INJ_STR "\n",
*i, (unsigned long long) bogus_arg, sprintrc(rc));
rc = syscall(__NR_prctl, *i, 0, bogus_arg, 0, 0);
printf("prctl(%#x" NRAW(" /* PR_??? */")
", 0, %#llx, 0, 0) = %s" INJ_STR "\n",
*i, (unsigned long long) bogus_arg, sprintrc(rc));
rc = syscall(__NR_prctl, *i, 0, 0, bogus_arg, 0);
printf("prctl(%#x" NRAW(" /* PR_??? */")
", 0, 0, %#llx, 0) = %s" INJ_STR "\n",
*i, (unsigned long long) bogus_arg, sprintrc(rc));
rc = syscall(__NR_prctl, *i, 0, 0, 0, bogus_arg);
printf("prctl(%#x" NRAW(" /* PR_??? */")
", 0, 0, 0, %#llx) = %s" INJ_STR "\n",
*i, (unsigned long long) bogus_arg, sprintrc(rc));
rc = syscall(__NR_prctl, *i, bogus_arg, bogus_arg + 1,
bogus_arg + 2, bogus_arg + 3);
printf("prctl(%#x" NRAW(" /* PR_??? */")
", %#llx, %#llx, %#llx, %#llx) = %s" INJ_STR "\n",
*i, (unsigned long long) bogus_arg,
(unsigned long long) bogus_arg + 1,
(unsigned long long) bogus_arg + 2,
(unsigned long long) bogus_arg + 3,
sprintrc(rc));
}
puts("+++ exited with 0 +++");
return 0;
}
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