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|
/*
* Check decoding of statmount 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
#define VALID_STATMOUNT 0xff
#define VALID_STATMOUNT_STR \
"STATMOUNT_SB_BASIC|STATMOUNT_MNT_BASIC|STATMOUNT_PROPAGATE_FROM" \
"|STATMOUNT_MNT_ROOT|STATMOUNT_MNT_POINT|STATMOUNT_FS_TYPE" \
"|STATMOUNT_MNT_NS_ID|STATMOUNT_MNT_OPTS"
#define INVALID_STATMOUNT 0xffffffffffffff00
#define INVALID_STATMOUNT_STR STRINGIFY_VAL(INVALID_STATMOUNT)
#define ALL_STATMOUNT_STR VALID_STATMOUNT_STR "|" INVALID_STATMOUNT_STR
#define VALID_MOUNT_ATTR_STR \
"MOUNT_ATTR_RDONLY|MOUNT_ATTR_NOSUID|MOUNT_ATTR_NODEV" \
"|MOUNT_ATTR_NOEXEC|MOUNT_ATTR__ATIME|MOUNT_ATTR_NODIRATIME" \
"|MOUNT_ATTR_IDMAP|MOUNT_ATTR_NOSYMFOLLOW"
#define INVALID_MOUNT_ATTR 0xffffffffffcfff00
#define INVALID_MOUNT_ATTR_STR STRINGIFY_VAL(INVALID_MOUNT_ATTR)
#define ALL_MOUNT_ATTR_STR VALID_MOUNT_ATTR_STR "|" INVALID_MOUNT_ATTR_STR
#define VALID_SB_FLAGS_STR \
"MS_RDONLY|MS_SYNCHRONOUS|MS_DIRSYNC|MS_LAZYTIME"
#define INVALID_SB_FLAGS 0xfdffff6e
#define INVALID_SB_FLAGS_STR STRINGIFY_VAL(INVALID_SB_FLAGS)
#define ALL_SB_FLAGS_STR VALID_SB_FLAGS_STR "|" INVALID_SB_FLAGS_STR
#define VALID_MNT_PROPAGATION_STR \
"MS_UNBINDABLE|MS_PRIVATE|MS_SLAVE|MS_SHARED"
#define INVALID_MNT_PROPAGATION 0xffffffffffe1ffff
#define INVALID_MNT_PROPAGATION_STR STRINGIFY_VAL(INVALID_MNT_PROPAGATION)
#define ALL_MNT_PROPAGATION_STR \
VALID_MNT_PROPAGATION_STR "|" INVALID_MNT_PROPAGATION_STR
static const kernel_ulong_t bad = (kernel_ulong_t) 0xbadc0dedbadc0dedULL;
static const char *errstr;
static long
k_statmount(const void *req, const void *buf,
const kernel_ulong_t bufsize, 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) buf;
const kernel_ulong_t arg3 = bufsize;
const kernel_ulong_t arg4 = fill | flags;
const long rc = syscall(__NR_statmount,
arg1, arg2, arg3, arg4, bad, bad);
errstr = sprintrc(rc);
return rc;
}
int
main(void)
{
k_statmount(0, 0, 0, 0);
printf("statmount(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;
#define STR_0 "dummy"
#define STR_1 "procfs"
#define STR_2 "/root"
#define STR_3 "/relative"
#define STR_4 "verbose"
static const char str[] =
STR_0 "\0"
STR_1 "\0"
STR_2 "\0"
STR_3 "\0"
STR_4;
struct statmount *const stm = midtail_alloc(sizeof(*stm), sizeof(str));
fill_memory(stm, sizeof(*stm));
const void *const bad_stm = (void *) stm + 1;
k_statmount(bad_req, bad_stm, bad, -1U);
printf("statmount(%p, %p, %ju, %#x) = %s" INJ_STR,
bad_req, bad_stm, (uintmax_t) bad, -1U, errstr);
TAIL_ALLOC_OBJECT_CONST_PTR(typeof(req->size), size);
const void *const bad_size = (void *) size + 1;
k_statmount(bad_size, 0, 0, 0);
printf("statmount(%p, NULL, 0, 0) = %s" INJ_STR, bad_size, errstr);
*size = MNT_ID_REQ_SIZE_VER0 - 1;
k_statmount(size, 0, 0, 0);
printf("statmount({size=%u}, NULL, 0, 0) = %s" INJ_STR, *size, errstr);
*size = MNT_ID_REQ_SIZE_VER0;
k_statmount(size, 0, 0, 0);
printf("statmount({size=%u, ???}, NULL, 0, 0) = %s" INJ_STR,
*size, errstr);
req->size = MNT_ID_REQ_SIZE_VER0;
req->param = INVALID_STATMOUNT;
k_statmount(req, 0, 0, 0);
printf("statmount({size=%u, spare=%#x, mnt_id=%#jx, param=%#jx"
" /* STATMOUNT_??? */}, 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;
req->spare = 0;
req->param = VALID_STATMOUNT;
k_statmount(req, 0, 0, 0);
printf("statmount({size=%u, mnt_id=%#jx, param=%s, mnt_ns_id=%#jx}"
", NULL, 0, 0) = %s" INJ_STR,
req->size, (uintmax_t) req->mnt_id, VALID_STATMOUNT_STR,
(uintmax_t) req->mnt_ns_id, errstr);
req->size = sizeof(*req);
req->param = (uint64_t) -1ULL;
k_statmount(req, 0, 0, 0);
printf("statmount({size=%u, mnt_id=%#jx, param=%s, mnt_ns_id=%#jx}"
", NULL, 0, 0) = %s" INJ_STR,
req->size, (uintmax_t) req->mnt_id, ALL_STATMOUNT_STR,
(uintmax_t) req->mnt_ns_id, errstr);
++req->size;
req->param = 0;
k_statmount(req, 0, 0, 0);
printf("statmount({size=%u, mnt_id=%#jx, param=0, mnt_ns_id=%#jx, ???}"
", NULL, 0, 0) = %s" INJ_STR, req->size,
(uintmax_t) req->mnt_id, (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_statmount(p, 0, 0, 0);
memmove(req, p, sizeof(*req));
printf("statmount({size=%u, mnt_id=%#jx, param=0, mnt_ns_id=%#jx"
", /* bytes %zu..%zu */ \"%s\"}, NULL, 0, 0) = %s" INJ_STR,
req->size, (uintmax_t) req->mnt_id, (uintmax_t) req->mnt_ns_id,
sizeof(*req), sizeof(*req) + 7,
"\\x80\\x81\\x82\\x83\\x84\\x85\\x86\\x87", errstr);
k_statmount(0, stm, sizeof(stm->size) - 1, 0);
printf("statmount(NULL, %p, %u, 0) = %s" INJ_STR,
stm, (unsigned int) sizeof(stm->size) - 1, errstr);
stm->size = sizeof(*stm);
k_statmount(0, bad_stm, stm->size, 0);
printf("statmount(NULL, %p, %u, 0) = %s" INJ_STR,
bad_stm, stm->size, errstr);
if (k_statmount(0, stm, sizeof(stm->size), 0) < 0)
printf("statmount(NULL, %p, %u, 0) = %s" INJ_STR,
stm, (unsigned int) sizeof(stm->size), errstr);
else
printf("statmount(NULL, {size=%u, mask=0}, %u, 0) = %s" INJ_STR,
stm->size, (unsigned int) sizeof(stm->size), errstr);
stm->size = 0xfacefeed;
stm->mask = (uint64_t) -1ULL;
stm->sb_magic = 0x9fa0;
stm->sb_flags = -1U;
stm->mnt_attr = (uint64_t) -1ULL;
stm->mnt_propagation = (uint64_t) -1ULL;
if (k_statmount(0, stm, sizeof(*stm), 0) < 0)
printf("statmount(NULL, %p, %u, 0) = %s" INJ_STR,
stm, (unsigned int) sizeof(*stm), errstr);
else
printf("statmount(NULL, {size=%u, mnt_opts=%#x, mask=%s"
", sb_dev_major=%u, sb_dev_minor=%u, sb_magic=%s"
", sb_flags=%s, fs_type=%#x, mnt_id=%#jx"
", mnt_parent_id=%#jx, mnt_id_old=%#x"
", mnt_parent_id_old=%#x, mnt_attr=%s"
", mnt_propagation=%s, mnt_peer_group=%#jx"
", mnt_master=%#jx, propagate_from=%#jx"
", mnt_root=%#x, mnt_point=%#x, mnt_ns_id=%#jx}"
", %u, 0) = %s" INJ_STR,
stm->size,
stm->mnt_opts,
ALL_STATMOUNT_STR,
stm->sb_dev_major,
stm->sb_dev_minor,
"PROC_SUPER_MAGIC",
ALL_SB_FLAGS_STR,
stm->fs_type,
(uintmax_t) stm->mnt_id,
(uintmax_t) stm->mnt_parent_id,
stm->mnt_id_old,
stm->mnt_parent_id_old,
ALL_MOUNT_ATTR_STR,
ALL_MNT_PROPAGATION_STR,
(uintmax_t) stm->mnt_peer_group,
(uintmax_t) stm->mnt_master,
(uintmax_t) stm->propagate_from,
stm->mnt_root,
stm->mnt_point,
(uintmax_t) stm->mnt_ns_id,
(unsigned int) sizeof(*stm), errstr);
*size = sizeof(*stm) + sizeof(str);
stm->size = *size;
stm->mask = INVALID_STATMOUNT;
if (k_statmount(0, stm, stm->size, 0) < 0)
printf("statmount(NULL, %p, %u, 0) = %s" INJ_STR,
stm, stm->size, errstr);
else {
printf("statmount(NULL, {size=%u, mask=%s}, %u, 0) = %s"
INJ_STR,
stm->size,
INVALID_STATMOUNT_STR " /* STATMOUNT_??? */",
stm->size, errstr);
}
stm->mask = VALID_STATMOUNT;
stm->sb_flags = INVALID_SB_FLAGS;
stm->mnt_attr = INVALID_MOUNT_ATTR;
stm->mnt_propagation = INVALID_MNT_PROPAGATION;
stm->fs_type = sizeof(STR_0);
stm->mnt_root = sizeof(STR_0) + sizeof(STR_1);
stm->mnt_point = sizeof(STR_0) + sizeof(STR_1) + sizeof(STR_2);
if (k_statmount(0, stm, stm->size, 0) < 0)
printf("statmount(NULL, %p, %u, 0) = %s" INJ_STR,
stm, stm->size, errstr);
else {
printf("statmount(NULL, {size=%u, mnt_opts=%#x, mask=%s"
", sb_dev_major=%u, sb_dev_minor=%u, sb_magic=%s"
", sb_flags=%s, fs_type=%#x, mnt_id=%#jx"
", mnt_parent_id=%#jx, mnt_id_old=%#x"
", mnt_parent_id_old=%#x, mnt_attr=%s"
", mnt_propagation=%s, mnt_peer_group=%#jx"
", mnt_master=%#jx, propagate_from=%#jx"
", mnt_root=%#x, mnt_point=%#x, mnt_ns_id=%#jx}"
", %u, 0) = %s" INJ_STR,
stm->size,
stm->mnt_opts,
VALID_STATMOUNT_STR,
stm->sb_dev_major,
stm->sb_dev_minor,
"PROC_SUPER_MAGIC",
INVALID_SB_FLAGS_STR " /* MS_??? */",
stm->fs_type,
(uintmax_t) stm->mnt_id,
(uintmax_t) stm->mnt_parent_id,
stm->mnt_id_old,
stm->mnt_parent_id_old,
INVALID_MOUNT_ATTR_STR " /* MOUNT_ATTR_??? */",
INVALID_MNT_PROPAGATION_STR " /* MS_??? */",
(uintmax_t) stm->mnt_peer_group,
(uintmax_t) stm->mnt_master,
(uintmax_t) stm->propagate_from,
stm->mnt_root,
stm->mnt_point,
(uintmax_t) stm->mnt_ns_id,
stm->size, errstr);
}
stm->mnt_opts =
sizeof(STR_0) + sizeof(STR_1) + sizeof(STR_2) + sizeof(STR_3);
stm->sb_flags = 0x2000091;
stm->mnt_attr = 0x3000ff;
stm->mnt_propagation = 0x1e0000;
p = (char *) stm - sizeof(str);
memmove(p, stm, sizeof(*stm));
memcpy(p + sizeof(*stm), str, sizeof(str) - 1);
if (k_statmount(0, p, *size + 1, 0) < 0)
printf("statmount(NULL, %p, %u, 0) = %s" INJ_STR,
p, *size + 1, errstr);
else {
memmove(stm, p, sizeof(*stm));
printf("statmount(NULL, {size=%u, mnt_opts=\"%s\"..., mask=%s"
", sb_dev_major=%u, sb_dev_minor=%u, sb_magic=%s"
", sb_flags=%s, fs_type=\"%s\", mnt_id=%#jx"
", mnt_parent_id=%#jx, mnt_id_old=%#x"
", mnt_parent_id_old=%#x, mnt_attr=%s"
", mnt_propagation=%s, mnt_peer_group=%#jx"
", mnt_master=%#jx, propagate_from=%#jx"
", mnt_root=\"%s\", mnt_point=\"%s\", mnt_ns_id=%#jx}"
", %u, 0) = %s"
INJ_STR,
stm->size,
STR_4,
VALID_STATMOUNT_STR,
stm->sb_dev_major,
stm->sb_dev_minor,
"PROC_SUPER_MAGIC",
VALID_SB_FLAGS_STR,
STR_1,
(uintmax_t) stm->mnt_id,
(uintmax_t) stm->mnt_parent_id,
stm->mnt_id_old,
stm->mnt_parent_id_old,
VALID_MOUNT_ATTR_STR,
VALID_MNT_PROPAGATION_STR,
(uintmax_t) stm->mnt_peer_group,
(uintmax_t) stm->mnt_master,
(uintmax_t) stm->propagate_from,
STR_2,
STR_3,
(uintmax_t) stm->mnt_ns_id,
stm->size + 1, errstr);
}
puts("+++ exited with 0 +++");
return 0;
}
|
