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/*
* Check decoding of listmount syscall.
*
* Copyright (c) 2024 Dmitry V. Levin <ldv@strace.io>
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <linux/mount.h>
#ifdef INJECT_RETVAL
# define INJ_STR " (INJECTED)\n"
#else
# define INJ_STR "\n"
#endif
static const kernel_ulong_t bad = (kernel_ulong_t) 0xbadc0dedbadc0dedULL;
static const char *errstr;
static long
k_listmount(const void *req, const void *mnt_ids,
const kernel_ulong_t nr_mnt_ids, const unsigned int flags)
{
const kernel_ulong_t fill = (kernel_ulong_t) 0xdefaced00000000ULL;
const kernel_ulong_t arg1 = (uintptr_t) req;
const kernel_ulong_t arg2 = (uintptr_t) mnt_ids;
const kernel_ulong_t arg3 = nr_mnt_ids;
const kernel_ulong_t arg4 = fill | flags;
const long rc = syscall(__NR_listmount,
arg1, arg2, arg3, arg4, bad, bad);
errstr = sprintrc(rc);
return rc;
}
int
main(void)
{
k_listmount(0, 0, 0, 0);
printf("listmount(NULL, NULL, 0, 0) = %s" INJ_STR, errstr);
struct mnt_id_req *const req = midtail_alloc(sizeof(*req), 8);
fill_memory(req, sizeof(*req));
const void *const bad_req = req + 1;
TAIL_ALLOC_OBJECT_CONST_ARR(uint64_t, mnt_ids, 2);
fill_memory(mnt_ids, sizeof(*mnt_ids) * 2);
const void *const bad_mnt_ids = mnt_ids + 2;
k_listmount(bad_req, bad_mnt_ids, bad, -1U);
printf("listmount(%p, %p, %ju, %s|%#x) = %s" INJ_STR,
bad_req, bad_mnt_ids, (uintmax_t) bad, "LISTMOUNT_REVERSE",
-1U & ~LISTMOUNT_REVERSE, errstr);
TAIL_ALLOC_OBJECT_CONST_PTR(typeof(req->size), size);
const void *const bad_size = (void *) size + 1;
k_listmount(bad_size, 0, 0, 0);
printf("listmount(%p, NULL, 0, 0) = %s" INJ_STR, bad_size, errstr);
*size = MNT_ID_REQ_SIZE_VER0 - 1;
k_listmount(size, 0, 0, 0);
printf("listmount({size=%u}, NULL, 0, 0) = %s" INJ_STR, *size, errstr);
*size = MNT_ID_REQ_SIZE_VER0;
k_listmount(size, 0, 0, 0);
printf("listmount({size=%u, ???}, NULL, 0, 0) = %s" INJ_STR,
*size, errstr);
req->size = MNT_ID_REQ_SIZE_VER0;
k_listmount(req, 0, 0, 0);
printf("listmount({size=%u, spare=%#x, mnt_id=%#jx, param=%#jx}"
", NULL, 0, 0) = %s" INJ_STR, req->size, req->spare,
(uintmax_t) req->mnt_id, (uintmax_t) req->param, errstr);
req->size = MNT_ID_REQ_SIZE_VER1;
k_listmount(req, 0, 0, 0);
printf("listmount({size=%u, spare=%#x, mnt_id=%#jx, param=%#jx"
", mnt_ns_id=%#jx}, NULL, 0, 0) = %s" INJ_STR, req->size,
req->spare, (uintmax_t) req->mnt_id, (uintmax_t) req->param,
(uintmax_t) req->mnt_ns_id, errstr);
req->size = sizeof(*req);
k_listmount(req, 0, 0, 0);
printf("listmount({size=%u, spare=%#x, mnt_id=%#jx, param=%#jx"
", mnt_ns_id=%#jx}, NULL, 0, 0) = %s" INJ_STR, req->size,
req->spare, (uintmax_t) req->mnt_id, (uintmax_t) req->param,
(uintmax_t) req->mnt_ns_id, errstr);
req->spare = 0;
k_listmount(req, 0, 0, 0);
printf("listmount({size=%u, mnt_id=%#jx, param=%#jx, mnt_ns_id=%#jx}"
", NULL, 0, 0) = %s" INJ_STR, req->size, (uintmax_t) req->mnt_id,
(uintmax_t) req->param, (uintmax_t) req->mnt_ns_id, errstr);
req->mnt_id = LSMT_ROOT;
k_listmount(req, 0, 0, 0);
printf("listmount({size=%u, mnt_id=%s, param=%#jx, mnt_ns_id=%#jx}"
", NULL, 0, 0) = %s" INJ_STR, req->size, "LSMT_ROOT",
(uintmax_t) req->param, (uintmax_t) req->mnt_ns_id, errstr);
++req->size;
k_listmount(req, 0, 0, 0);
printf("listmount({size=%u, mnt_id=%s, param=%#jx, mnt_ns_id=%#jx, ???}"
", NULL, 0, 0) = %s" INJ_STR, req->size, "LSMT_ROOT",
(uintmax_t) req->param, (uintmax_t) req->mnt_ns_id, errstr);
req->size = sizeof(*req) + 8;
char *p = (char *) req - 8;
memmove(p, req, sizeof(*req));
fill_memory(p + sizeof(*req), 8);
k_listmount(p, 0, 0, 0);
memmove(req, p, sizeof(*req));
printf("listmount({size=%u, mnt_id=%s, param=%#jx, mnt_ns_id=%#jx"
", /* bytes %zu..%zu */ \"%s\"}, NULL, 0, 0) = %s" INJ_STR,
req->size, "LSMT_ROOT", (uintmax_t) req->param,
(uintmax_t) req->mnt_ns_id, sizeof(*req), sizeof(*req) + 7,
"\\x80\\x81\\x82\\x83\\x84\\x85\\x86\\x87", errstr);
k_listmount(0, mnt_ids, 0, 0);
printf("listmount(NULL, [], 0, 0) = %s" INJ_STR, errstr);
if (k_listmount(0, mnt_ids, 1, 0) < 0)
printf("listmount(NULL, %p, 1, 0) = %s" INJ_STR,
mnt_ids, errstr);
else
printf("listmount(NULL, [%#jx], 1, 0) = %s" INJ_STR,
(uintmax_t) mnt_ids[0], errstr);
if (k_listmount(0, mnt_ids, 2, 0) < 0)
printf("listmount(NULL, %p, 2, 0) = %s" INJ_STR,
mnt_ids, errstr);
else
printf("listmount(NULL, [%#jx, %#jx], 2, 0) = %s" INJ_STR,
(uintmax_t) mnt_ids[0], (uintmax_t) mnt_ids[1], errstr);
if (k_listmount(0, mnt_ids, 3, 0) < 0)
printf("listmount(NULL, %p, 3, 0) = %s" INJ_STR,
mnt_ids, errstr);
else
printf("listmount(NULL, [%#jx, %#jx, ... /* %p */], 3, 0) = %s"
INJ_STR, (uintmax_t) mnt_ids[0], (uintmax_t) mnt_ids[1],
bad_mnt_ids, errstr);
puts("+++ exited with 0 +++");
return 0;
}
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