KASAN: use-after-free Read in f2fs_flush_nat_entries

From: butt3rflyh4ck
Date: Mon Mar 22 2021 - 04:19:00 EST

Hi, I reported a bug found by syzkaller fuzzer with custom modifications.
reproduce it in 5.12.0-rc3+ and crash log is as fellow:

==================================================================
BUG: KASAN: use-after-free in f2fs_test_bit fs/f2fs/f2fs.h:2572 [inline]
BUG: KASAN: use-after-free in current_nat_addr fs/f2fs/node.h:213 [inline]
BUG: KASAN: use-after-free in get_next_nat_page fs/f2fs/node.c:123 [inline]
BUG: KASAN: use-after-free in __flush_nat_entry_set fs/f2fs/node.c:2888 [inline]
BUG: KASAN: use-after-free in f2fs_flush_nat_entries+0x258e/0x2960
fs/f2fs/node.c:2991
Read of size 1 at addr ffff88804a180e05 by task syz-executor191/8437

CPU: 0 PID: 8437 Comm: syz-executor191 Not tainted 5.12.0-rc3+ #45
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.13.0-1ubuntu1 04/01/2014
Call Trace:
__dump_stack lib/dump_stack.c:79 [inline]
dump_stack+0xfa/0x151 lib/dump_stack.c:120
print_address_description.constprop.0.cold+0x82/0x32c mm/kasan/report.c:232
__kasan_report mm/kasan/report.c:399 [inline]
kasan_report.cold+0x7c/0xd8 mm/kasan/report.c:416
f2fs_test_bit fs/f2fs/f2fs.h:2572 [inline]
current_nat_addr fs/f2fs/node.h:213 [inline]
get_next_nat_page fs/f2fs/node.c:123 [inline]
__flush_nat_entry_set fs/f2fs/node.c:2888 [inline]
f2fs_flush_nat_entries+0x258e/0x2960 fs/f2fs/node.c:2991
f2fs_write_checkpoint+0x1372/0x6a70 fs/f2fs/checkpoint.c:1640
f2fs_issue_checkpoint+0x149/0x410 fs/f2fs/checkpoint.c:1807
f2fs_sync_fs+0x20f/0x420 fs/f2fs/super.c:1454
__sync_filesystem fs/sync.c:39 [inline]
sync_filesystem fs/sync.c:67 [inline]
sync_filesystem+0x1b5/0x260 fs/sync.c:48
generic_shutdown_super+0x70/0x370 fs/super.c:448
kill_block_super+0x97/0xf0 fs/super.c:1394
kill_f2fs_super+0x28c/0x370 fs/f2fs/super.c:4128
deactivate_locked_super+0x8c/0xf0 fs/super.c:335
deactivate_super fs/super.c:366 [inline]
deactivate_super+0xad/0xd0 fs/super.c:362
cleanup_mnt+0x347/0x4b0 fs/namespace.c:1136
task_work_run+0xe0/0x1a0 kernel/task_work.c:140
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop kernel/entry/common.c:174 [inline]
exit_to_user_mode_prepare+0x25c/0x270 kernel/entry/common.c:208
__syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:301
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4527cb
Code: 07 00 48 83 c4 08 5b 5d c3 66 0f 1f 44 00 00 c3 66 2e 0f 1f 84
00 00 00 00 00 0f 1f 44 00 00 f3 0f 1e fa b8 a6 00 00 00 0f 05 <48> 3d
01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffed7ad9228 EFLAGS: 00000206 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 00000000000020f6 RCX: 00000000004527cb
RDX: 0000000000401ef8 RSI: 0000000000000002 RDI: 00007ffed7ad92e0
RBP: 00007ffed7ad92e0 R08: 000000000049c00c R09: 00007ffed7ad90b0
R10: 00000000fffffffd R11: 0000000000000206 R12: 00007ffed7ada350
R13: 0000000002287b70 R14: 00007ffed7ad9248 R15: 0000000000000001

Allocated by task 1:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_set_track mm/kasan/common.c:46 [inline]
set_alloc_info mm/kasan/common.c:427 [inline]
__kasan_slab_alloc+0x75/0x90 mm/kasan/common.c:460
kasan_slab_alloc include/linux/kasan.h:223 [inline]
slab_post_alloc_hook mm/slab.h:516 [inline]
slab_alloc_node mm/slub.c:2907 [inline]
slab_alloc mm/slub.c:2915 [inline]
kmem_cache_alloc+0x242/0x900 mm/slub.c:2920
getname_flags fs/namei.c:138 [inline]
getname_flags+0xd2/0x5b0 fs/namei.c:128
user_path_at_empty+0x2a/0x50 fs/namei.c:2733
user_path_at include/linux/namei.h:60 [inline]
vfs_statx+0x13c/0x370 fs/stat.c:195
vfs_fstatat fs/stat.c:217 [inline]
vfs_lstat include/linux/fs.h:3240 [inline]
__do_sys_newlstat+0x91/0x110 fs/stat.c:372
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xae

Freed by task 1:
kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
kasan_set_track+0x1c/0x30 mm/kasan/common.c:46
kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:357
____kasan_slab_free mm/kasan/common.c:360 [inline]
____kasan_slab_free mm/kasan/common.c:325 [inline]
__kasan_slab_free+0xf6/0x130 mm/kasan/common.c:367
kasan_slab_free include/linux/kasan.h:199 [inline]
slab_free_hook mm/slub.c:1562 [inline]
slab_free_freelist_hook mm/slub.c:1600 [inline]
slab_free mm/slub.c:3161 [inline]
kmem_cache_free+0xb4/0x450 mm/slub.c:3177
putname+0xe1/0x120 fs/namei.c:259
filename_lookup+0x282/0x3e0 fs/namei.c:2463
user_path_at include/linux/namei.h:60 [inline]
vfs_statx+0x13c/0x370 fs/stat.c:195
vfs_fstatat fs/stat.c:217 [inline]
vfs_lstat include/linux/fs.h:3240 [inline]
__do_sys_newlstat+0x91/0x110 fs/stat.c:372
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xae

The buggy address belongs to the object at ffff88804a180000
which belongs to the cache names_cache of size 4096
The buggy address is located 3589 bytes inside of
4096-byte region [ffff88804a180000, ffff88804a181000)
The buggy address belongs to the page:
page:00000000b163d35e refcount:1 mapcount:0 mapping:0000000000000000
index:0x0 pfn:0x4a180
head:00000000b163d35e order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4fff00000010200(slab|head)
raw: 04fff00000010200 dead000000000100 dead000000000122 ffff888040005140
raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
ffff88804a180d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88804a180d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88804a180e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88804a180e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88804a180f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

The attachment is a reproduce.

Regards,
butt3rflyh4ck.
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/mount.h>
#include <sys/prctl.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>

#include <linux/loop.h>

static unsigned long long procid;

static void sleep_ms(uint64_t ms)
{
usleep(ms * 1000);
}

static uint64_t current_time_ms(void)
{
struct timespec ts;
if (clock_gettime(CLOCK_MONOTONIC, &ts))
exit(1);
return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000;
}

static void use_temporary_dir(void)
{
char tmpdir_template[] = "./syzkaller.XXXXXX";
char* tmpdir = mkdtemp(tmpdir_template);
if (!tmpdir)
exit(1);
if (chmod(tmpdir, 0777))
exit(1);
if (chdir(tmpdir))
exit(1);
}

static bool write_file(const char* file, const char* what, ...)
{
char buf[1024];
va_list args;
va_start(args, what);
vsnprintf(buf, sizeof(buf), what, args);
va_end(args);
buf[sizeof(buf) - 1] = 0;
int len = strlen(buf);
int fd = open(file, O_WRONLY | O_CLOEXEC);
if (fd == -1)
return false;
if (write(fd, buf, len) != len) {
int err = errno;
close(fd);
errno = err;
return false;
}
close(fd);
return true;
}

struct fs_image_segment {
void* data;
uintptr_t size;
uintptr_t offset;
};

#define IMAGE_MAX_SEGMENTS 4096
#define IMAGE_MAX_SIZE (129 << 20)

#define sys_memfd_create 319

static unsigned long fs_image_segment_check(unsigned long size, unsigned long nsegs, struct fs_image_segment* segs)
{
if (nsegs > IMAGE_MAX_SEGMENTS)
nsegs = IMAGE_MAX_SEGMENTS;
for (size_t i = 0; i < nsegs; i++) {
if (segs[i].size > IMAGE_MAX_SIZE)
segs[i].size = IMAGE_MAX_SIZE;
segs[i].offset %= IMAGE_MAX_SIZE;
if (segs[i].offset > IMAGE_MAX_SIZE - segs[i].size)
segs[i].offset = IMAGE_MAX_SIZE - segs[i].size;
if (size < segs[i].offset + segs[i].offset)
size = segs[i].offset + segs[i].offset;
}
if (size > IMAGE_MAX_SIZE)
size = IMAGE_MAX_SIZE;
return size;
}
static int setup_loop_device(long unsigned size, long unsigned nsegs, struct fs_image_segment* segs, const char* loopname, int* memfd_p, int* loopfd_p)
{
int err = 0, loopfd = -1;
size = fs_image_segment_check(size, nsegs, segs);
int memfd = syscall(sys_memfd_create, "syzkaller", 0);
if (memfd == -1) {
err = errno;
goto error;
}
if (ftruncate(memfd, size)) {
err = errno;
goto error_close_memfd;
}
for (size_t i = 0; i < nsegs; i++) {
if (pwrite(memfd, segs[i].data, segs[i].size, segs[i].offset) < 0) {
}
}
loopfd = open(loopname, O_RDWR);
if (loopfd == -1) {
err = errno;
goto error_close_memfd;
}
if (ioctl(loopfd, LOOP_SET_FD, memfd)) {
if (errno != EBUSY) {
err = errno;
goto error_close_loop;
}
ioctl(loopfd, LOOP_CLR_FD, 0);
usleep(1000);
if (ioctl(loopfd, LOOP_SET_FD, memfd)) {
err = errno;
goto error_close_loop;
}
}
*memfd_p = memfd;
*loopfd_p = loopfd;
return 0;

error_close_loop:
close(loopfd);
error_close_memfd:
close(memfd);
error:
errno = err;
return -1;
}

static long syz_mount_image(volatile long fsarg, volatile long dir, volatile unsigned long size, volatile unsigned long nsegs, volatile long segments, volatile long flags, volatile long optsarg)
{
struct fs_image_segment* segs = (struct fs_image_segment*)segments;
int res = -1, err = 0, loopfd = -1, memfd = -1, need_loop_device = !!segs;
char* mount_opts = (char*)optsarg;
char* target = (char*)dir;
char* fs = (char*)fsarg;
char* source = NULL;
char loopname[64];
if (need_loop_device) {
memset(loopname, 0, sizeof(loopname));
snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid);
if (setup_loop_device(size, nsegs, segs, loopname, &memfd, &loopfd) == -1)
return -1;
source = loopname;
}
mkdir(target, 0777);
char opts[256];
memset(opts, 0, sizeof(opts));
if (strlen(mount_opts) > (sizeof(opts) - 32)) {
}
strncpy(opts, mount_opts, sizeof(opts) - 32);
if (strcmp(fs, "iso9660") == 0) {
flags |= MS_RDONLY;
} else if (strncmp(fs, "ext", 3) == 0) {
if (strstr(opts, "errors=panic") || strstr(opts, "errors=remount-ro") == 0)
strcat(opts, ",errors=continue");
} else if (strcmp(fs, "xfs") == 0) {
strcat(opts, ",nouuid");
}
res = mount(source, target, fs, flags, opts);
if (res == -1) {
err = errno;
goto error_clear_loop;
}
res = open(target, O_RDONLY | O_DIRECTORY);
if (res == -1) {
err = errno;
}

error_clear_loop:
if (need_loop_device) {
ioctl(loopfd, LOOP_CLR_FD, 0);
close(loopfd);
close(memfd);
}
errno = err;
return res;
}

#define FS_IOC_SETFLAGS _IOW('f', 2, long)
static void remove_dir(const char* dir)
{
int iter = 0;
DIR* dp = 0;
retry:
while (umount2(dir, MNT_DETACH) == 0) {
}
dp = opendir(dir);
if (dp == NULL) {
if (errno == EMFILE) {
exit(1);
}
exit(1);
}
struct dirent* ep = 0;
while ((ep = readdir(dp))) {
if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0)
continue;
char filename[FILENAME_MAX];
snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name);
while (umount2(filename, MNT_DETACH) == 0) {
}
struct stat st;
if (lstat(filename, &st))
exit(1);
if (S_ISDIR(st.st_mode)) {
remove_dir(filename);
continue;
}
int i;
for (i = 0;; i++) {
if (unlink(filename) == 0)
break;
if (errno == EPERM) {
int fd = open(filename, O_RDONLY);
if (fd != -1) {
long flags = 0;
if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) {
}
close(fd);
continue;
}
}
if (errno == EROFS) {
break;
}
if (errno != EBUSY || i > 100)
exit(1);
if (umount2(filename, MNT_DETACH))
exit(1);
}
}
closedir(dp);
for (int i = 0;; i++) {
if (rmdir(dir) == 0)
break;
if (i < 100) {
if (errno == EPERM) {
int fd = open(dir, O_RDONLY);
if (fd != -1) {
long flags = 0;
if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) {
}
close(fd);
continue;
}
}
if (errno == EROFS) {
break;
}
if (errno == EBUSY) {
if (umount2(dir, MNT_DETACH))
exit(1);
continue;
}
if (errno == ENOTEMPTY) {
if (iter < 100) {
iter++;
goto retry;
}
}
}
exit(1);
}
}

static void kill_and_wait(int pid, int* status)
{
kill(-pid, SIGKILL);
kill(pid, SIGKILL);
for (int i = 0; i < 100; i++) {
if (waitpid(-1, status, WNOHANG | __WALL) == pid)
return;
usleep(1000);
}
DIR* dir = opendir("/sys/fs/fuse/connections");
if (dir) {
for (;;) {
struct dirent* ent = readdir(dir);
if (!ent)
break;
if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0)
continue;
char abort[300];
snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort", ent->d_name);
int fd = open(abort, O_WRONLY);
if (fd == -1) {
continue;
}
if (write(fd, abort, 1) < 0) {
}
close(fd);
}
closedir(dir);
} else {
}
while (waitpid(-1, status, __WALL) != pid) {
}
}

static void reset_loop()
{
char buf[64];
snprintf(buf, sizeof(buf), "/dev/loop%llu", procid);
int loopfd = open(buf, O_RDWR);
if (loopfd != -1) {
ioctl(loopfd, LOOP_CLR_FD, 0);
close(loopfd);
}
}

static void setup_test()
{
prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
setpgrp();
write_file("/proc/self/oom_score_adj", "1000");
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
int iter = 0;
for (;; iter++) {
char cwdbuf[32];
sprintf(cwdbuf, "./%d", iter);
if (mkdir(cwdbuf, 0777))
exit(1);
reset_loop();
int pid = fork();
if (pid < 0)
exit(1);
if (pid == 0) {
if (chdir(cwdbuf))
exit(1);
setup_test();
execute_one();
exit(0);
}
int status = 0;
uint64_t start = current_time_ms();
for (;;) {
if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
break;
sleep_ms(1);
if (current_time_ms() - start < 5000) {
continue;
}
kill_and_wait(pid, &status);
break;
}
remove_dir(cwdbuf);
}
}

void execute_one(void)
{
memcpy((void*)0x20000000, "f2fs\000", 5);
memcpy((void*)0x20000100, "./mnt\000", 6);
*(uint64_t*)0x20000200 = 0x20010000;
memcpy((void*)0x20010000, "\x10\x20\xf5\xf2\x01\x00\x0e\x00\x09\x00\x00\x00\x03\x00\x00\x00\x0c\x00\x00\x00\x09\x00\x00\x00\x01\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x40\x00\x00\x00\x00\x00\x00\x18\x00\x00\x00\x1f\x00\x00\x00\x02\x00\x00\x00\x02\x00\x00\x00\x02\x00\x00\x00\x01\x00\x00\x00\x18\x00\x00\x00\x00\x02\x00\x00\x00\x02\x00\x00\x00\x06\x00\x00\x00\x0a\x00\x00\x00\x0e\x00\x00\x00\x10\x00\x00\x03\x00\x00\x00\x01\x00\x00\x00\x02\x00\x00\x00\xa3\xbd\x86\x5d\xa4\xe8\x4b\x25\x9c\xaa\xc9\x03\x30\x88\x87\xeb\x00\x00\x00\x00", 128);
*(uint64_t*)0x20000208 = 0x80;
*(uint64_t*)0x20000210 = 0x400;
*(uint64_t*)0x20000218 = 0;
*(uint64_t*)0x20000220 = 0;
*(uint64_t*)0x20000228 = 0x860;
*(uint64_t*)0x20000230 = 0;
*(uint64_t*)0x20000238 = 0;
*(uint64_t*)0x20000240 = 0x57;
*(uint64_t*)0x20000248 = 0;
*(uint64_t*)0x20000250 = 0;
*(uint64_t*)0x20000258 = 0xb80;
*(uint64_t*)0x20000260 = 0;
*(uint64_t*)0x20000268 = 0;
*(uint64_t*)0x20000270 = 0xc80;
*(uint64_t*)0x20000278 = 0;
*(uint64_t*)0x20000280 = 0;
*(uint64_t*)0x20000288 = 0xec0;
*(uint64_t*)0x20000290 = 0;
*(uint64_t*)0x20000298 = 0;
*(uint64_t*)0x200002a0 = 0x1400;
*(uint64_t*)0x200002a8 = 0;
*(uint64_t*)0x200002b0 = 0;
*(uint64_t*)0x200002b8 = 0x9797;
*(uint64_t*)0x200002c0 = 0;
*(uint64_t*)0x200002c8 = 0;
*(uint64_t*)0x200002d0 = 0x1a80;
*(uint64_t*)0x200002d8 = 0;
*(uint64_t*)0x200002e0 = 0;
*(uint64_t*)0x200002e8 = 0x1b80;
*(uint64_t*)0x200002f0 = 0;
*(uint64_t*)0x200002f8 = 0;
*(uint64_t*)0x20000300 = 0x1c80;
*(uint64_t*)0x20000308 = 0;
*(uint64_t*)0x20000310 = 0;
*(uint64_t*)0x20000318 = 0x1ec0;
*(uint64_t*)0x20000320 = 0x200106c0;
memcpy((void*)0x200106c0, "\x0b\xd0\x3b\x75\x00\x00\x00\x00\x00\x10\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x0d\x00\x00\x00\x10\x00\x00\x00\x12\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x02\x00\x00\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x03\x00\x00\x00\x0b\x00\x00\x00\x05\x00\x00\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x85\x01\x00\x00\x06\x00\x00\x00\x01\x00\x00\x00\x01\x00\x00\x00\x01\x00\x00\x00\x04\x00\x00\x00\x40\x00\x00\x00\x40\x00\x00\x00\xfc\x0f\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 192);
*(uint64_t*)0x20000328 = 0xc0;
*(uint64_t*)0x20000330 = 0x200000;
*(uint64_t*)0x20000338 = 0x20010780;
memcpy((void*)0x20010780, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xd9\xfa\x28\xd5\x01\x00\x03\x00\x00\x05\x00\x03\x00\x00\x00\x00\x10\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 64);
*(uint64_t*)0x20000340 = 0x40;
*(uint64_t*)0x20000348 = 0x200fe0;
*(uint64_t*)0x20000350 = 0x200107c0;
memcpy((void*)0x200107c0, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x06\x00\x00\x00\x00\x00\x01\x0c\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 64);
*(uint64_t*)0x20000358 = 0x40;
*(uint64_t*)0x20000360 = 0x2011e0;
*(uint64_t*)0x20000368 = 0x20010800;
memcpy((void*)0x20010800, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x10\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 32);
*(uint64_t*)0x20000370 = 0x20;
*(uint64_t*)0x20000378 = 0x201240;
*(uint64_t*)0x20000380 = 0x20010820;
memcpy((void*)0x20010820, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x14\x00", 32);
*(uint64_t*)0x20000388 = 0x20;
*(uint64_t*)0x20000390 = 0x201280;
*(uint64_t*)0x20000398 = 0x20010840;
memcpy((void*)0x20010840, "\x00\x00\x00\x00\x00\x00\x00\x03\x00\x00\x00\x01\x00\x80\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 32);
*(uint64_t*)0x200003a0 = 0x20;
*(uint64_t*)0x200003a8 = 0x2012e0;
*(uint64_t*)0x200003b0 = 0x20010860;
memcpy((void*)0x20010860, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x0b\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00", 32);
*(uint64_t*)0x200003b8 = 0x20;
*(uint64_t*)0x200003c0 = 0x201320;
*(uint64_t*)0x200003c8 = 0x20010880;
memcpy((void*)0x20010880, "\x00\x00\x00\x05\x00\x00\x00\x00\x08\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 32);
*(uint64_t*)0x200003d0 = 0x20;
*(uint64_t*)0x200003d8 = 0x201380;
*(uint64_t*)0x200003e0 = 0;
*(uint64_t*)0x200003e8 = 0;
*(uint64_t*)0x200003f0 = 0x2013e0;
*(uint64_t*)0x200003f8 = 0;
*(uint64_t*)0x20000400 = 0;
*(uint64_t*)0x20000408 = 0x202000;
*(uint64_t*)0x20000410 = 0;
*(uint64_t*)0x20000418 = 0;
*(uint64_t*)0x20000420 = 0x202fe0;
*(uint64_t*)0x20000428 = 0;
*(uint64_t*)0x20000430 = 0;
*(uint64_t*)0x20000438 = 0x203fde;
*(uint64_t*)0x20000440 = 0x20010920;
memcpy((void*)0x20010920, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x0b\xd0\x3b\x75\x00\x00\x00\x00\x00\x10\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x0d\x00\x00\x00\x10\x00\x00\x00\x12\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x02\x00\x00\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x03\x00\x00\x00\x0b\x00\x00\x00\x05\x00\x00\x00\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x85\x01\x00\x00\x06\x00\x00\x00\x01\x00\x00\x00\x01\x00\x00\x00\x01\x00\x00\x00\x04\x00\x00\x00\x40\x00\x00\x00\x40\x00\x00\x00\xfc\x0f\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 224);
*(uint64_t*)0x20000448 = 0xe0;
*(uint64_t*)0x20000450 = 0x204fe0;
*(uint64_t*)0x20000458 = 0x20010a00;
memcpy((void*)0x20010a00, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xd9\xfa\x28\xd5", 32);
*(uint64_t*)0x20000460 = 0x20;
*(uint64_t*)0x20000468 = 0x205fe0;
*(uint64_t*)0x20000470 = 0x20010a20;
memcpy((void*)0x20010a20, "\x0b\xd0\x3b\x75\xd9\xfa\x28\xd5\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 32);
*(uint64_t*)0x20000478 = 0x20;
*(uint64_t*)0x20000480 = 0x3ff000;
*(uint64_t*)0x20000488 = 0;
*(uint64_t*)0x20000490 = 0;
*(uint64_t*)0x20000498 = 0x3ff040;
*(uint64_t*)0x200004a0 = 0;
*(uint64_t*)0x200004a8 = 0;
*(uint64_t*)0x200004b0 = 0x400000;
*(uint64_t*)0x200004b8 = 0;
*(uint64_t*)0x200004c0 = 0;
*(uint64_t*)0x200004c8 = 0x400fe0;
*(uint64_t*)0x200004d0 = 0;
*(uint64_t*)0x200004d8 = 0;
*(uint64_t*)0x200004e0 = 0x405000;
*(uint64_t*)0x200004e8 = 0;
*(uint64_t*)0x200004f0 = 0;
*(uint64_t*)0x200004f8 = 0x405fe0;
*(uint64_t*)0x20000500 = 0x20010c60;
memcpy((void*)0x20010c60, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x01\x00\x00\x00\x00\x02\x00\x00\x00\x01\x00\x00\x00\x00\x03\x00\x00\x00\x00\x10\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 64);
*(uint64_t*)0x20000508 = 0x40;
*(uint64_t*)0x20000510 = 0xa00000;
*(uint64_t*)0x20000518 = 0x20010ca0;
memcpy((void*)0x20010ca0, "\xed\x41\x00\x00\xe8\x03\x00\x00\xe8\x03\x00\x00\x02\x00\x00\x00\x00\x10\x00\x00\x00\x00\x00\x00\x02\x00\x00\x00\x00\x00\x00\x00\x55\xff\xc6\x5f\x00\x00\x00\x00\x55\xff\xc6\x5f\x00\x00\x00\x00\x55\xff\xc6\x5f\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00", 96);
*(uint64_t*)0x20000520 = 0x60;
*(uint64_t*)0x20000528 = 0x1000000;
*(uint64_t*)0x20000530 = 0;
*(uint64_t*)0x20000538 = 0;
*(uint64_t*)0x20000540 = 0x1000160;
*(uint64_t*)0x20000548 = 0x20010d20;
memcpy((void*)0x20010d20, "\x00\x00\x00\x00\x00\x00\x00\x00\x03\x00\x00\x00\x03\x00\x00\x00\x00\x00\x00\x00\x01\x00\x00\x00\x00\x00\x00\x00\x01\x10\x00\x00", 32);
*(uint64_t*)0x20000550 = 0x20;
*(uint64_t*)0x20000558 = 0x1000fe0;
*(uint64_t*)0x20000560 = 0;
*(uint64_t*)0x20000568 = 0;
*(uint64_t*)0x20000570 = 0x1600000;
*(uint64_t*)0x20000578 = 0;
*(uint64_t*)0x20000580 = 0;
*(uint64_t*)0x20000588 = 0x1600940;
*(uint8_t*)0x20010da0 = 0;
syz_mount_image(0x20000000, 0x20000100, 0x4000000, 0x26, 0x20000200, 0, 0x20010da0);

}
int main(void)
{
syscall(__NR_mmap, 0x1ffff000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x32ul, -1, 0ul);
syscall(__NR_mmap, 0x21000000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul);
use_temporary_dir();
loop();
return 0;
}