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/* SPDX-License-Identifier: MIT */
#include <fcntl.h>
#include <signal.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <sys/mman.h>
#include <sys/wait.h>
#include <time.h>
#include <unistd.h>
#include "liburing.h"
#include "../src/syscall.h"
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;
}
#define SIZEOF_IO_URING_SQE 64
#define SIZEOF_IO_URING_CQE 16
#define SQ_TAIL_OFFSET 64
#define SQ_RING_MASK_OFFSET 256
#define SQ_RING_ENTRIES_OFFSET 264
#define CQ_RING_ENTRIES_OFFSET 268
#define CQ_CQES_OFFSET 320
#define IORING_OFF_SQES 0x10000000ULL
static void kill_and_wait(int pid, int* status)
{
kill(-pid, SIGKILL);
kill(pid, SIGKILL);
while (waitpid(-1, status, __WALL) != pid) {
}
}
#define WAIT_FLAGS __WALL
uint64_t r[3] = {0xffffffffffffffff, 0x0, 0x0};
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 = __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;
}
void trigger_bug(void)
{
intptr_t res = 0;
*(uint32_t*)0x20000204 = 0;
*(uint32_t*)0x20000208 = 2;
*(uint32_t*)0x2000020c = 0;
*(uint32_t*)0x20000210 = 0;
*(uint32_t*)0x20000218 = -1;
memset((void*)0x2000021c, 0, 12);
res = -1;
res = syz_io_uring_setup(0x7987, 0x20000200, 0x20400000, 0x20ffd000, 0x200000c0, 0x200001c0);
if (res != -1) {
r[0] = res;
r[1] = *(uint64_t*)0x200000c0;
r[2] = *(uint64_t*)0x200001c0;
}
*(uint8_t*)0x20000180 = 0xb;
*(uint8_t*)0x20000181 = 1;
*(uint16_t*)0x20000182 = 0;
*(uint32_t*)0x20000184 = 0;
*(uint64_t*)0x20000188 = 4;
*(uint64_t*)0x20000190 = 0x20000140;
*(uint64_t*)0x20000140 = 0x77359400;
*(uint64_t*)0x20000148 = 0;
*(uint32_t*)0x20000198 = 1;
*(uint32_t*)0x2000019c = 0;
*(uint64_t*)0x200001a0 = 0;
*(uint16_t*)0x200001a8 = 0;
*(uint16_t*)0x200001aa = 0;
memset((void*)0x200001ac, 0, 20);
syz_io_uring_submit(r[1], r[2], 0x20000180, 1);
*(uint32_t*)0x20000544 = 0;
*(uint32_t*)0x20000548 = 0x36;
*(uint32_t*)0x2000054c = 0;
*(uint32_t*)0x20000550 = 0;
*(uint32_t*)0x20000558 = r[0];
memset((void*)0x2000055c, 0, 12);
}
int main(void)
{
mmap((void *)0x20000000ul, 0x1000000ul, 7ul, 0x32ul, -1, 0ul);
int pid = fork();
if (pid < 0)
exit(1);
if (pid == 0) {
trigger_bug();
exit(0);
}
int status = 0;
uint64_t start = current_time_ms();
for (;;) {
if (current_time_ms() - start < 1000) {
continue;
}
kill_and_wait(pid, &status);
break;
}
return 0;
}
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