#define _GNU_SOURCE 

#include <endian.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

#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

#define sys_io_uring_setup 425
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(sys_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;
}

#ifndef __NR_io_uring_enter
#define __NR_io_uring_enter 426
#endif

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

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);
				intptr_t res = 0;
*(uint32_t*)0x20000084 = 0;
*(uint32_t*)0x20000088 = 0;
*(uint32_t*)0x2000008c = 2;
*(uint32_t*)0x20000090 = 0;
*(uint32_t*)0x20000098 = 0;
*(uint32_t*)0x2000009c = 0;
*(uint32_t*)0x200000a0 = 0;
*(uint32_t*)0x200000a4 = 0;
	res = -1;
res = syz_io_uring_setup(0x5bfa, 0x20000080, 0x200a0000, 0x200b0000, 0x20000100, 0x20000140);
	if (res != -1) {
		r[0] = res;
r[1] = *(uint64_t*)0x20000100;
r[2] = *(uint64_t*)0x20000140;
	}
*(uint8_t*)0x200001c0 = 0x1c;
*(uint8_t*)0x200001c1 = 0;
*(uint16_t*)0x200001c2 = 0;
*(uint32_t*)0x200001c4 = 0xffffff9c;
*(uint64_t*)0x200001c8 = 0x20000200;
*(uint64_t*)0x20000200 = 0x42;
*(uint64_t*)0x20000208 = 0;
*(uint64_t*)0x20000210 = 0;
*(uint64_t*)0x200001d0 = 0x20000240;
memcpy((void*)0x20000240, "./file1\000", 8);
*(uint32_t*)0x200001d8 = 0x18;
*(uint32_t*)0x200001dc = 0;
*(uint64_t*)0x200001e0 = 0x12345;
*(uint16_t*)0x200001e8 = 0;
*(uint16_t*)0x200001ea = 0;
*(uint8_t*)0x200001ec = 0;
*(uint8_t*)0x200001ed = 0;
*(uint8_t*)0x200001ee = 0;
*(uint8_t*)0x200001ef = 0;
*(uint8_t*)0x200001f0 = 0;
*(uint8_t*)0x200001f1 = 0;
*(uint8_t*)0x200001f2 = 0;
*(uint8_t*)0x200001f3 = 0;
*(uint8_t*)0x200001f4 = 0;
*(uint8_t*)0x200001f5 = 0;
*(uint8_t*)0x200001f6 = 0;
*(uint8_t*)0x200001f7 = 0;
*(uint8_t*)0x200001f8 = 0;
*(uint8_t*)0x200001f9 = 0;
*(uint8_t*)0x200001fa = 0;
*(uint8_t*)0x200001fb = 0;
*(uint8_t*)0x200001fc = 0;
*(uint8_t*)0x200001fd = 0;
*(uint8_t*)0x200001fe = 0;
*(uint8_t*)0x200001ff = 0;
syz_io_uring_submit(r[1], r[2], 0x200001c0, 0);
	syscall(__NR_io_uring_enter, r[0], 1, 1, 1ul, 0ul, 0ul);
	return 0;
}