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

#define _GNU_SOURCE 

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <pthread.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.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/futex.h>

#ifndef __NR_io_uring_enter
#define __NR_io_uring_enter 426
#endif
#ifndef __NR_io_uring_setup
#define __NR_io_uring_setup 425
#endif

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 thread_start(void* (*fn)(void*), void* arg)
{
	pthread_t th;
	pthread_attr_t attr;
	pthread_attr_init(&attr);
	pthread_attr_setstacksize(&attr, 128 << 10);
	int i = 0;
	for (; i < 100; i++) {
		if (pthread_create(&th, &attr, fn, arg) == 0) {
			pthread_attr_destroy(&attr);
			return;
		}
		if (errno == EAGAIN) {
			usleep(50);
			continue;
		}
		break;
	}
	exit(1);
}

typedef struct {
	int state;
} event_t;

static void event_init(event_t* ev)
{
	ev->state = 0;
}

static void event_reset(event_t* ev)
{
	ev->state = 0;
}

static void event_set(event_t* ev)
{
	if (ev->state)
	exit(1);
	__atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE);
	syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1000000);
}

static void event_wait(event_t* ev)
{
	while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
		syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0);
}

static int event_isset(event_t* ev)
{
	return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE);
}

static int event_timedwait(event_t* ev, uint64_t timeout)
{
	uint64_t start = current_time_ms();
	uint64_t now = start;
	for (;;) {
		uint64_t remain = timeout - (now - start);
		struct timespec ts;
		ts.tv_sec = remain / 1000;
		ts.tv_nsec = (remain % 1000) * 1000 * 1000;
		syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts);
		if (__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE))
			return 1;
		now = current_time_ms();
		if (now - start > timeout)
			return 0;
	}
}

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;
}

#define SIZEOF_IO_URING_SQE 64
#define SIZEOF_IO_URING_CQE 16
#define SQ_HEAD_OFFSET 0
#define SQ_TAIL_OFFSET 64
#define SQ_RING_MASK_OFFSET 256
#define SQ_RING_ENTRIES_OFFSET 264
#define SQ_FLAGS_OFFSET 276
#define SQ_DROPPED_OFFSET 272
#define CQ_HEAD_OFFSET 128
#define CQ_TAIL_OFFSET 192
#define CQ_RING_MASK_OFFSET 260
#define CQ_RING_ENTRIES_OFFSET 268
#define CQ_RING_OVERFLOW_OFFSET 284
#define CQ_FLAGS_OFFSET 280
#define CQ_CQES_OFFSET 320

struct io_sqring_offsets {
	uint32_t head;
	uint32_t tail;
	uint32_t ring_mask;
	uint32_t ring_entries;
	uint32_t flags;
	uint32_t dropped;
	uint32_t array;
	uint32_t resv1;
	uint64_t resv2;
};

struct io_cqring_offsets {
	uint32_t head;
	uint32_t tail;
	uint32_t ring_mask;
	uint32_t ring_entries;
	uint32_t overflow;
	uint32_t cqes;
	uint64_t resv[2];
};

struct io_uring_params {
	uint32_t sq_entries;
	uint32_t cq_entries;
	uint32_t flags;
	uint32_t sq_thread_cpu;
	uint32_t sq_thread_idle;
	uint32_t features;
	uint32_t resv[4];
	struct io_sqring_offsets sq_off;
	struct io_cqring_offsets cq_off;
};

#define IORING_OFF_SQ_RING 0
#define IORING_OFF_SQES 0x10000000ULL

static long syz_io_uring_setup(volatile long a0, volatile long a1, volatile long a2, volatile long a3, volatile long a4, volatile long a5)
{
	uint32_t entries = (uint32_t)a0;
	struct io_uring_params* setup_params = (struct io_uring_params*)a1;
	void* vma1 = (void*)a2;
	void* vma2 = (void*)a3;
	void** ring_ptr_out = (void**)a4;
	void** sqes_ptr_out = (void**)a5;
	uint32_t fd_io_uring = syscall(__NR_io_uring_setup, entries, setup_params);
	uint32_t sq_ring_sz = setup_params->sq_off.array + setup_params->sq_entries * sizeof(uint32_t);
	uint32_t cq_ring_sz = setup_params->cq_off.cqes + setup_params->cq_entries * SIZEOF_IO_URING_CQE;
	uint32_t ring_sz = sq_ring_sz > cq_ring_sz ? sq_ring_sz : cq_ring_sz;
	*ring_ptr_out = mmap(vma1, ring_sz, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE | MAP_FIXED, fd_io_uring, IORING_OFF_SQ_RING);
	uint32_t sqes_sz = setup_params->sq_entries * SIZEOF_IO_URING_SQE;
	*sqes_ptr_out = mmap(vma2, sqes_sz, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_POPULATE | MAP_FIXED, fd_io_uring, IORING_OFF_SQES);
	return fd_io_uring;
}

static long syz_io_uring_submit(volatile long a0, volatile long a1, volatile long a2, volatile long a3)
{
	char* ring_ptr = (char*)a0;
	char* sqes_ptr = (char*)a1;
	char* sqe = (char*)a2;
	uint32_t sqes_index = (uint32_t)a3;
	uint32_t sq_ring_entries = *(uint32_t*)(ring_ptr + SQ_RING_ENTRIES_OFFSET);
	uint32_t cq_ring_entries = *(uint32_t*)(ring_ptr + CQ_RING_ENTRIES_OFFSET);
	uint32_t sq_array_off = (CQ_CQES_OFFSET + cq_ring_entries * SIZEOF_IO_URING_CQE + 63) & ~63;
	if (sq_ring_entries)
		sqes_index %= sq_ring_entries;
	char* sqe_dest = sqes_ptr + sqes_index * SIZEOF_IO_URING_SQE;
	memcpy(sqe_dest, sqe, SIZEOF_IO_URING_SQE);
	uint32_t sq_ring_mask = *(uint32_t*)(ring_ptr + SQ_RING_MASK_OFFSET);
	uint32_t* sq_tail_ptr = (uint32_t*)(ring_ptr + SQ_TAIL_OFFSET);
	uint32_t sq_tail = *sq_tail_ptr & sq_ring_mask;
	uint32_t sq_tail_next = *sq_tail_ptr + 1;
	uint32_t* sq_array = (uint32_t*)(ring_ptr + sq_array_off);
	*(sq_array + sq_tail) = sqes_index;
	__atomic_store_n(sq_tail_ptr, sq_tail_next, __ATOMIC_RELEASE);
	return 0;
}

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

struct thread_t {
	int created, call;
	event_t ready, done;
};

static struct thread_t threads[16];
static void execute_call(int call);
static int running;

static void* thr(void* arg)
{
	struct thread_t* th = (struct thread_t*)arg;
	for (;;) {
		event_wait(&th->ready);
		event_reset(&th->ready);
		execute_call(th->call);
		__atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED);
		event_set(&th->done);
	}
	return 0;
}

static void execute_one(void)
{
	int i, call, thread;
	for (call = 0; call < 4; call++) {
		for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) {
			struct thread_t* th = &threads[thread];
			if (!th->created) {
				th->created = 1;
				event_init(&th->ready);
				event_init(&th->done);
				event_set(&th->done);
				thread_start(thr, th);
			}
			if (!event_isset(&th->done))
				continue;
			event_reset(&th->done);
			th->call = call;
			__atomic_fetch_add(&running, 1, __ATOMIC_RELAXED);
			event_set(&th->ready);
			if (call == 3)
				break;
			event_timedwait(&th->done, 50);
			break;
		}
	}
	for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++)
		sleep_ms(1);
}

static void execute_one(void);

#define WAIT_FLAGS __WALL

static void loop(void)
{
	int iter = 0;
	for (;; iter++) {
		int pid = fork();
		if (pid < 0)
	exit(1);
		if (pid == 0) {
			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;
		}
	}
}

uint64_t r[3] = {0xffffffffffffffff, 0x0, 0x0};

void execute_call(int call)
{
		intptr_t res = 0;
	switch (call) {
	case 0:
memcpy((void*)0x20000040, "/dev/vga_arbiter\000", 17);
		syscall(__NR_openat, 0xffffffffffffff9cul, 0x20000040ul, 0x802ul, 0ul);
		{
		int i;
		for(i = 0; i < 32; i++) {
		syscall(__NR_openat, 0xffffffffffffff9cul, 0x20000040ul, 0x802ul, 0ul);
				}
		}
		break;
	case 1:
*(uint32_t*)0x20000084 = 0;
*(uint32_t*)0x20000088 = 0;
*(uint32_t*)0x2000008c = 0;
*(uint32_t*)0x20000090 = 0;
*(uint32_t*)0x20000098 = 0;
memset((void*)0x2000009c, 0, 12);
		res = -1;
res = syz_io_uring_setup(1, 0x20000080, 0x200a0000, 0x200b0000, 0x20000100, 0x20000140);
		if (res != -1) {
				r[0] = res;
r[1] = *(uint64_t*)0x20000100;
r[2] = *(uint64_t*)0x20000140;
		}
		break;
	case 2:
*(uint8_t*)0x200001c0 = 0x1e;
*(uint8_t*)0x200001c1 = 0;
*(uint16_t*)0x200001c2 = 0;
*(uint32_t*)0x200001c4 = 0;
*(uint64_t*)0x200001c8 = 0;
*(uint32_t*)0x200001d0 = 0;
*(uint32_t*)0x200001d4 = -1;
*(uint32_t*)0x200001d8 = 0;
*(uint32_t*)0x200001dc = 0;
*(uint64_t*)0x200001e0 = 0;
*(uint16_t*)0x200001e8 = 0;
*(uint16_t*)0x200001ea = 0;
*(uint32_t*)0x200001ec = r[0];
memset((void*)0x200001f0, 0, 16);
syz_io_uring_submit(r[1], r[2], 0x200001c0, 0);
		{
		int i;
		for(i = 0; i < 64; i++) {
syz_io_uring_submit(r[1], r[2], 0x200001c0, 0);
				}
		}
		break;
	case 3:
		syscall(__NR_io_uring_enter, r[0], 1, 0, 0ul, 0ul, 0ul);
		break;
	}

}
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);
	for (procid = 0; procid < 8; procid++) {
		if (fork() == 0) {
			loop();
		}
	}
	sleep(1000000);
	return 0;
}