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

#define _GNU_SOURCE 

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

#include <linux/capability.h>

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;
}

static long syz_open_dev(volatile long a0, volatile long a1, volatile long a2)
{
	if (a0 == 0xc || a0 == 0xb) {
		char buf[128];
		sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1, (uint8_t)a2);
		return open(buf, O_RDWR, 0);
	} else {
		char buf[1024];
		char* hash;
		strncpy(buf, (char*)a0, sizeof(buf) - 1);
		buf[sizeof(buf) - 1] = 0;
		while ((hash = strchr(buf, '#'))) {
			*hash = '0' + (char)(a1 % 10);
			a1 /= 10;
		}
		return open(buf, a2, 0);
	}
}

static void setup_common()
{
	if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) {
	}
}

static void setup_binderfs()
{
	if (mkdir("/dev/binderfs", 0777)) {
	}
	if (mount("binder", "/dev/binderfs", "binder", 0, NULL)) {
	}
	if (symlink("/dev/binderfs", "./binderfs")) {
	}
}

static void loop();

static void sandbox_common()
{
	prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0);
	setsid();
	struct rlimit rlim;
	rlim.rlim_cur = rlim.rlim_max = (200 << 20);
	setrlimit(RLIMIT_AS, &rlim);
	rlim.rlim_cur = rlim.rlim_max = 32 << 20;
	setrlimit(RLIMIT_MEMLOCK, &rlim);
	rlim.rlim_cur = rlim.rlim_max = 136 << 20;
	setrlimit(RLIMIT_FSIZE, &rlim);
	rlim.rlim_cur = rlim.rlim_max = 1 << 20;
	setrlimit(RLIMIT_STACK, &rlim);
	rlim.rlim_cur = rlim.rlim_max = 0;
	setrlimit(RLIMIT_CORE, &rlim);
	rlim.rlim_cur = rlim.rlim_max = 256;
	setrlimit(RLIMIT_NOFILE, &rlim);
	if (unshare(CLONE_NEWNS)) {
	}
	if (mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, NULL)) {
	}
	if (unshare(CLONE_NEWIPC)) {
	}
	if (unshare(0x02000000)) {
	}
	if (unshare(CLONE_NEWUTS)) {
	}
	if (unshare(CLONE_SYSVSEM)) {
	}
	typedef struct {
		const char* name;
		const char* value;
	} sysctl_t;
	static const sysctl_t sysctls[] = {
		{"/proc/sys/kernel/shmmax", "16777216"},
		{"/proc/sys/kernel/shmall", "536870912"},
		{"/proc/sys/kernel/shmmni", "1024"},
		{"/proc/sys/kernel/msgmax", "8192"},
		{"/proc/sys/kernel/msgmni", "1024"},
		{"/proc/sys/kernel/msgmnb", "1024"},
		{"/proc/sys/kernel/sem", "1024 1048576 500 1024"},
	};
	unsigned i;
	for (i = 0; i < sizeof(sysctls) / sizeof(sysctls[0]); i++)
		write_file(sysctls[i].name, sysctls[i].value);
}

static int wait_for_loop(int pid)
{
	if (pid < 0)
		exit(1);
	int status = 0;
	while (waitpid(-1, &status, __WALL) != pid) {
	}
	return WEXITSTATUS(status);
}

static void drop_caps(void)
{
	struct __user_cap_header_struct cap_hdr = {};
	struct __user_cap_data_struct cap_data[2] = {};
	cap_hdr.version = _LINUX_CAPABILITY_VERSION_3;
	cap_hdr.pid = getpid();
	if (syscall(SYS_capget, &cap_hdr, &cap_data))
		exit(1);
	const int drop = (1 << CAP_SYS_PTRACE) | (1 << CAP_SYS_NICE);
	cap_data[0].effective &= ~drop;
	cap_data[0].permitted &= ~drop;
	cap_data[0].inheritable &= ~drop;
	if (syscall(SYS_capset, &cap_hdr, &cap_data))
		exit(1);
}

static int do_sandbox_none(void)
{
	if (unshare(CLONE_NEWPID)) {
	}
	int pid = fork();
	if (pid != 0)
		return wait_for_loop(pid);
	setup_common();
	sandbox_common();
	drop_caps();
	if (unshare(CLONE_NEWNET)) {
	}
	setup_binderfs();
	loop();
	exit(1);
}

static int inject_fault(int nth)
{
	int fd;
	fd = open("/proc/thread-self/fail-nth", O_RDWR);
	if (fd == -1)
		exit(1);
	char buf[16];
	sprintf(buf, "%d", nth);
	if (write(fd, buf, strlen(buf)) != (ssize_t)strlen(buf))
		exit(1);
	return fd;
}

static void setup_fault()
{
	static struct {
		const char* file;
		const char* val;
		bool fatal;
	} files[] = {
		{"/sys/kernel/debug/failslab/ignore-gfp-wait", "N", true},
		{"/sys/kernel/debug/fail_futex/ignore-private", "N", false},
		{"/sys/kernel/debug/fail_page_alloc/ignore-gfp-highmem", "N", false},
		{"/sys/kernel/debug/fail_page_alloc/ignore-gfp-wait", "N", false},
		{"/sys/kernel/debug/fail_page_alloc/min-order", "0", false},
	};
	unsigned i;
	for (i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
		if (!write_file(files[i].file, files[i].val)) {
			if (files[i].fatal)
				exit(1);
		}
	}
}

uint64_t r[1] = {0xffffffffffffffff};

void loop(void)
{
	intptr_t res = 0;
	memcpy((void*)0x20000540, "/dev/dri/card#\000", 15);
	res = -1;
	res = syz_open_dev(0x20000540, 0x2000000000000000, 0);
	if (res != -1)
		r[0] = res;
	*(uint32_t*)0x20000180 = 7;
	*(uint32_t*)0x20000184 = 0xfc000;
	*(uint32_t*)0x20000188 = 0xc39;
	*(uint32_t*)0x2000018c = 0;
	inject_fault(20);
	syscall(__NR_ioctl, r[0], 0xc02064b2, 0x20000180ul);

}
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);
	setup_fault();
	do_sandbox_none();
	return 0;
}