// https://syzkaller.appspot.com/bug?id=af63f5e2fae13601dc704abdefe541a3aa6fb3a0
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE 

#include <dirent.h>
#include <endian.h>
#include <fcntl.h>
#include <poll.h>
#include <pwd.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/event.h>
#include <sys/ioctl.h>
#include <sys/ktrace.h>
#include <sys/mman.h>
#include <sys/msg.h>
#include <sys/resource.h>
#include <sys/sem.h>
#include <sys/shm.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/sysctl.h>
#include <sys/syslog.h>
#include <sys/wait.h>
#include <unistd.h>

static __thread int clone_ongoing;
static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
	if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) {
		exit(sig);
	}
	uintptr_t addr = (uintptr_t)info->si_addr;
	const uintptr_t prog_start = 1 << 20;
	const uintptr_t prog_end = 100 << 20;
	int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0;
	int valid = addr < prog_start || addr > prog_end;
	if (skip && valid) {
		_longjmp(segv_env, 1);
	}
	exit(sig);
}

static void install_segv_handler(void)
{
	struct sigaction sa;
	memset(&sa, 0, sizeof(sa));
	sa.sa_sigaction = segv_handler;
	sa.sa_flags = SA_NODEFER | SA_SIGINFO;
	sigaction(SIGSEGV, &sa, NULL);
	sigaction(SIGBUS, &sa, NULL);
}

#define NONFAILING(...) ({ int ok = 1; __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST); if (_setjmp(segv_env) == 0) { __VA_ARGS__; } else ok = 0; __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST); ok; })

#define CAST 

static void sandbox_common()
{
		if (setsid() == -1)
	exit(1);
	struct rlimit rlim;
	rlim.rlim_cur = rlim.rlim_max = 8 << 20;
	setrlimit(RLIMIT_MEMLOCK, &rlim);
	rlim.rlim_cur = rlim.rlim_max = 1 << 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);
}

static void loop();

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

static int do_sandbox_setuid(void)
{
	int pid = fork();
	if (pid != 0)
		return wait_for_loop(pid);
	sandbox_common();
	char pwbuf[1024];
	struct passwd *pw, pwres;
	if (getpwnam_r("nobody", &pwres, pwbuf, sizeof(pwbuf), &pw) != 0 || !pw)
	exit(1);
	if (setgroups(0, NULL))
	exit(1);
	if (setgid(pw->pw_gid))
	exit(1);
	if (setuid(pw->pw_uid))
	exit(1);
	loop();
	exit(1);
}

uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};

void loop(void)
{
		intptr_t res = 0;
	NONFAILING(*(uint32_t*)0x20000000 = 0);
	NONFAILING(*(uint32_t*)0x20000004 = 0);
	NONFAILING(*(uint64_t*)0x20000008 = 0);
	NONFAILING(*(uint64_t*)0x20000010 = 0x10000000000001);
	NONFAILING(((intptr_t(*)(intptr_t,intptr_t,intptr_t))CAST(ioctl))(/*fd=*/-1, /*cmd=*/0x80185760, /*arg=*/0x20000000));
	NONFAILING(*(uint16_t*)0x200000c0 = 0);
	NONFAILING(*(uint16_t*)0x200000c2 = 0);
	NONFAILING(*(uint64_t*)0x200000c8 = 0);
	NONFAILING(*(uint64_t*)0x200000d0 = 0x1000080000800);
	NONFAILING(*(uint32_t*)0x200000d8 = 0);
	NONFAILING(((intptr_t(*)(intptr_t,intptr_t,intptr_t))CAST(fcntl))(/*fd=*/-1, /*cmd=*/0, /*lock=*/0x200000c0));
	NONFAILING(*(uint16_t*)0x200000c0 = 0x18e6);
	NONFAILING(*(uint8_t*)0x200000c2 = 7);
	NONFAILING(*(uint32_t*)0x200000c4 = 0);
	NONFAILING(((intptr_t(*)(intptr_t,intptr_t,intptr_t))CAST(connect))(/*fd=*/-1, /*addr=*/0x200000c0, /*addrlen=*/0x1c));
	NONFAILING(((intptr_t(*)(intptr_t,intptr_t,intptr_t))CAST(mprotect))(/*addr=*/0x20000000, /*len=*/0x800000, /*prot=*/5));
	res = -1;
	NONFAILING(res = ((intptr_t(*)(intptr_t,intptr_t,intptr_t))CAST(socket))(/*domain=*/0x18, /*type=*/1, /*proto=*/0));
	if (res != -1)
		r[0] = res;
	NONFAILING(((intptr_t(*)(intptr_t))CAST(close))(/*fd=*/r[0]));
	res = -1;
	NONFAILING(res = ((intptr_t(*)(intptr_t,intptr_t,intptr_t))CAST(socket))(/*domain=*/0x18, /*type=*/1, /*proto=*/0));
	if (res != -1)
		r[1] = res;
	NONFAILING(memcpy((void*)0x20000000, "\xeb\xff\xcb\xff\x13\xb9\xfd\x81\x2e\xaa\x4e\x71\x30\x48\xe6\x99\x31\x92\x96\x48", 20));
	NONFAILING(((intptr_t(*)(intptr_t,intptr_t,intptr_t,intptr_t,intptr_t))CAST(setsockopt))(/*fd=*/r[1], /*level=*/0x29, /*optname=*/0x2e, /*optval=*/0x20000000, /*optlen=*/0x14));
	NONFAILING(*(uint16_t*)0x200000c0 = 0);
	NONFAILING(*(uint8_t*)0x200000c2 = 7);
	NONFAILING(*(uint32_t*)0x200000c4 = 0);
	NONFAILING(((intptr_t(*)(intptr_t,intptr_t,intptr_t))CAST(connect))(/*fd=*/r[0], /*addr=*/0x200000c0, /*addrlen=*/0x1c));

}
int main(void)
{
		NONFAILING(((intptr_t(*)(intptr_t,intptr_t,intptr_t,intptr_t,intptr_t,intptr_t))CAST(mmap))(/*addr=*/0x20000000, /*len=*/0x1000000, /*prot=*/3, /*flags=*/0x1012, /*fd=*/-1, /*offset=*/0));
	install_segv_handler();
			do_sandbox_setuid();
	return 0;
}