// https://syzkaller.appspot.com/bug?id=426a727262bcd7a4f516dd2ff8e7dff540bd1dc6
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.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>

#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 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 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 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");
}

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 < 15000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[1] = {0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  *(uint32_t*)0x20000104 = 0;
  *(uint32_t*)0x20000108 = 0;
  *(uint32_t*)0x2000010c = 0;
  *(uint32_t*)0x20000110 = 0;
  *(uint32_t*)0x20000118 = -1;
  memset((void*)0x2000011c, 0, 12);
  res = -1;
  res = syz_io_uring_setup(0x17c, 0x20000100, 0x20001000, 0x20ffe000,
                           0x20000180, 0x200002c0);
  if (res != -1)
    r[0] = res;
  *(uint64_t*)0x20000300 = 0;
  *(uint64_t*)0x20000308 = 0;
  memcpy(
      (void*)0x20000310,
      "\x48\x43\xb2\x6a\x6f\x53\x78\x67\x94\x6d\x60\xf3\x03\x22\x2e\x3b\xc9\x5a"
      "\x98\x50\xb2\x25\x8b\x60\xbe\xb7\x2f\x8e\xcb\xaf\x30\xca\xb4\xc3\x45\x33"
      "\xad\x15\x25\xe2\x3d\xa6\x52\x0c\xe9\x0c\x6e\x05\x02\xd7\xd2\xca\x34\xa2"
      "\x84\xdd\xa6\xc2\xb6\x95\x67\x4f\xae\x88\x27\x78\x5d\x22\x05\x1d\xab\x3d"
      "\x15\xd9\x26\x2e\x72\x64\xe5\xaa\x11\x9a\x6b\xb1\x53\x27\x75\x7c\x4d\x78"
      "\x1a\x25\xa9\xef\x98\x3d\x39\x62\x63\x12\x87\xcf\x8e\x4d\xb9\x4e\xba\x34"
      "\xcf\x25\xf7\x5a\x19\x0d\x3b\x6d\x2f\x62\x62\x6f\xe5\x85\x9f\x6d\xa9\xbb"
      "\xc0\xa3\x1c\x3e\x17\x37\xc5\x11\x5b\x4c\xe0\xe3\xa1\x07\x37\xe9\x0f\x9a"
      "\x1a\x55\xe4\xd4\x41\xe5\x8a\x6d\x14\xf1\x0f\x8f\xf0\x7e\x56\x11\xfe\x42"
      "\xff\x0e\x73\xb5\x67\x7b\x79\xa6\xf4\x92\x03\x19\x25\x78\x12\x0f\xc6\x2b"
      "\xe6\x44\x9d\x4b\x78\xb4\xe1\xcd\x04\xaa\xc5\x79\x9c\x92\xf5\x40\xc4\xaf"
      "\xe5\x00\x7c\x3e\xa9\x25\x4b\x42\xa7\xf8\x0b\x91\x10\x7b\x4e\xd4\x84\x2c"
      "\x32\x8b\x1b\xb6\x26\x2d\x61\xe0\x3c\x2e\x4d\x99\x33\xb2\x03\x56\xda\x07"
      "\x3e\xcc\x44\x84\x93\xa1\x69\x15\x2f\xf3\x81\xa7\x29\x41\x31\x29\xd2\x12"
      "\xb7\x3a\x82\xbb",
      256);
  memcpy(
      (void*)0x20000410,
      "\xab\x4c\x7b\xd3\xa1\x80\x64\x84\xd6\xd2\x2a\x65\x57\x48\xaf\x4c\xbf\x1a"
      "\xe4\x8e\xd5\x8e\x7b\xb2\x34\x3a\x64\x57\x1e\xb9\xcb\xe3\x84\x88\xef\x24"
      "\x64\x63\x57\x02\x77\xcc\xa8\x7c\x68\x37\x3b\xc1\x6c\x89\xf2\xb5\xb4\x4e"
      "\x43\x2c\xea\xd2\xab\xeb\x29\x87\x51\xbd\xc9\xae\x9f\x6c\x35\xae\x90\x22"
      "\xf0\xcd\x3a\x23\x82\x7e\x45\xd8\xae\x5e\xe7\x4a\x3f\x3c\x3d\x33\x87\x52"
      "\xd6\x58\xa6\xd9\x0c\x69\xb3\x2e\xd1\xb1\xec\x8e\x0b\xda\x35\xbf\x19\x73"
      "\x10\x24\x4d\x3d\x18\x36\x3a\xc9\x79\x73\xf4\x85\x3d\xd2\x75\x46\xbd\xb1"
      "\x57\x7e\x0f\x4f\xf5\xaa\xed\x63\x6e\xed\x56\x74\x60\x31\x90\xc4\x8b\xc9"
      "\xc1\xb0\x2a\xe0\xb9\x49\xb8\x72\xcd\xb8\x07\x58\xbd\x63\x83\x2a\x55\x24"
      "\x86\x8a\x75\x6a\x71\x8e\xea\xb4\xbf\x8f\x93\xb9\xd6\x55\x21\x9e\x84\xfd"
      "\x3a\xaf\x02\x38\x5e\xab\xed\x65\x9c\x67\x7e\x29\xba\x5a\x54\xc1\x74\x31"
      "\x95\xe5\x34\xf7\x81\xf3\xad\x8a\xd3\x53\xbe\xf1\xcb\x34\x8c\xf9\x3a\xec"
      "\xaf\x89\x64\xd0\x59\xb0\x4a\x20\xde\x71\x0b\x39\x7c\x3f\xb9\xeb\x43\x55"
      "\x44\x4a\x7d\x05\x55\x94\x08\x59\x79\xb5\xdb\x13\x4e\x87\xd4\x54\xba\xc4"
      "\xcc\x15\x83\xa3\x21\x0a\xf1\x98\x56\x1c\x1d\xb4\xbf\x96\x90\xa4\x9c\x21"
      "\xc7\x57\xdf\x1c\x2f\x78\x07\xd7\x08\x0d\x07\x5a\x00\x89\xe8\xe8\xe2\x23"
      "\xeb\x6a\xd5\xe6\xc2\x2b\xb0\x64\x63\xf9\xf0\x00\xab\x11\xc2\xae\x98\x61"
      "\x68\x98\x48\xb3\x38\x91\x7f\x60\x09\x8b\x8e\x1b\xaf\x11\x95\xaa\x70\x54"
      "\x84\x07\xf6\x2f\x4a\x87\x84\x7c\xb5\x09\x4f\x2b\x64\xf5\xeb\xd2\x67\x17"
      "\xd0\x0b\x62\xd1\xe1\xaa\x6c\xc6\x31\xb0\x48\x01\xd7\x4e\xdf\xad\x9c\x30"
      "\x37\xaa\x80\x12\x21\x00\x72\x5c\x1c\xd8\xb9\x31\x6f\xa3\xbd\x9a\xa5\xe4"
      "\xef\xe4\x27\xd4\x6a\x80\xeb\x2d\x5c\x1d\x06\x1f\xc5\x01\x6e\x4a\x40\x7b"
      "\x48\x95\x84\x21\xb2\xb1\xd3\xd2\x51\xb0\x1a\x03\x54\xa6\x23\xe9\x58\x08"
      "\x22\xae\xcf\xdf\x5c\x68\xf5\x93\x6f\xe7\xe5\x31\x9e\xb2\x6a\x57\xce\x34"
      "\x7e\x7c\x99\x02\xd7\xed\x85\x97\x38\xda\x4c\xfd\xc8\xf6\x1d\xe9\xdd\xf1"
      "\x2c\xd2\xb6\x88\x69\x37\x08\x83\xa2\x47\x7f\xaa\xa2\xec\x58\x1c\xbd\xc3"
      "\xa7\xf9\xd0\x02\x8e\xef\xb7\x24\x10\xeb\xa1\x0a\x19\xcf\x4c\x17\x15\x70"
      "\x9a\x42\x24\x99\x98\xfe\xea\xaf\x94\x1f\x61\xc4\xfb\x79\x4e\x6e\x4e\x48"
      "\xdb\xc1\xac\x56\x48\xbf\x04\x64\x08\xbe\xc1\xf5\x2f\x81\x08\xe1\x8a\xed"
      "\x79\x32\xd6\xdb\xdb\xaf\x89\x66\xa7\x3c\x11\x0b\xfd\xeb\xb9\x6a\x5b\x0a"
      "\x40\x2f\x17\x08\x1b\x8e\x02\x2f\xf5\x45\x81\x2d\x58\x49\x02\xf8\x94\x7a"
      "\xf8\x5d\x72\xc0\xee\x01\x18\x4d\x47\x66\x8a\x90\x5b\xd0\x3c\xd9\x5e\x5c"
      "\xe1\x4a\x64\xbf\x72\x4f\xf1\x05\xd5\x03\xf4\xaa\xf5\xa4\x4a\xa2\x93\x3c"
      "\xd3\xb1\x85\xae\xda\x09\xe7\x85\x0a\x40\x6e\xf7\x78\xfb\x77\xdf\xc8\x8d"
      "\x53\xcb\x9c\xa6\xde\x8d\x36\x38\xf3\x1c\x13\xf0\xca\x2c\x90\xad\xdc\x5a"
      "\x5f\xd0\x6a\x9c\x01\x9e\xcc\xed\xe4\xf6\xe5\x0b\xfd\x1e\x94\xc7\xa6\x35"
      "\x67\x4e\x61\x58\x1b\x63\x95\xd7\x09\xde\xe3\x10\x6b\x4a\x4c\xb0\xd3\x19"
      "\x36\x69\x02\x9a\x52\x4d\xcf\x51\x1e\x09\x81\xe2\xd2\x0a\xd1\x8f\xc9\xa6"
      "\x68\x9e\xe1\xd0\x0d\xb6\x2a\x9b\xa4\x32\xc7\xf7\x39\xbb\x89\x44\x8b\x77"
      "\xc1\x82\x63\x4f\x2d\x86\x91\xe3\xc8\xba\x56\x51\x4d\x5d\x22\x15\x33\x35"
      "\x1f\x17\xba\xa6\x45\xaa\x0e\xa7\x09\x7e\xca\x60\xf9\xd7\x28\xb2\x3b\x4e"
      "\xc7\xaa\x27\x15\xe7\x26\x77\xef\x21\x47\xe9\x9c\xb5\x63\xbb\x44\xb0\x06"
      "\x61\xcd\xe2\x67\xfa\x2c\xf2\x56\x61\x6e\xda\xe9\x44\xe7\x4f\x70\xe4\xc0"
      "\xfc\x39\xfc\x9a\x50\x3f\x0f\x1f\x15\x26\x03\x8c\xbb\xfb\xa4\x31\xba\x66"
      "\x8c\x77\x53\x16\x9a\x55\x05\x96\x09\xde\x27\x1c\x6e\xa6\xf0\x31\xe3\x3a"
      "\x5e\x09\x94\x14\x83\xd5\xf9\xe6\xc3\x8e\x29\x2f\x32\x31\xb7\xbc\x1a\x5c"
      "\xa9\xdf\x9b\xd7\xce\x7e\xfa\x6b\x41\xd2\x39\x8a\xbc\xcf\xdb\xd8\xd5\x92"
      "\x6e\x66\xb6\x5b\x00\x40\xd3\xc1\xd7\xc5\x59\x90\xc7\xc0\xbf\x78\x48\x6c"
      "\xac\x84\xd5\x2a\xcd\xa3\x62\x9a\x9f\x77\x29\xa7\x62\x36\x4e\x57\x18\xa6"
      "\x58\xd0\x64\x5b\xd8\xa3\x01\xde\x16\x1f\x21\xd5\x40\xfe\x5b\x9f\x12\x53"
      "\xd9\x8d\xbf\xc2\xc9\x5b\x9c\xac\xaf\x8f\x9c\x7c\x58\x4e\xa4\x45\xd1\xcd"
      "\x59\x25\x95\x70\xd9\xef\x73\xca\x75\x2a\x82\x79\x32\x67\x18\x62\x7a\x96"
      "\x37\x58\x95\xeb\x73\x52\xc5\xb7\x42\xbb\x24\x85\x21\x51\xee\x34\xdb\xb2"
      "\x39\x36\x6c\x99\x4e\x29\xd2\xe5\x05\x09\x48\x40\x63\xfe\xa1\xb9\xce\xab"
      "\x44\xfd\xd4\xdd\x5a\x1c\x81\x9d\x2a\x4e\x7e\x6d\x9f\x46\x35\x75\x31\x8c"
      "\x96\x1e\x63\x7b\x35\xc1\xc6\x0b\xab\x7c\xf1\x4a\xf9\x12\xf5\x7d\xf8\xda"
      "\x64\x0f\x21\x18\x5b\x41\x18\x3b\xcd\x9a\xd8\x79\x50\x0b\x4b\x85\x43\x17"
      "\xac\xa5\x9a\xd0\xb5\xc8\x99\x99\xde\x5c\xad\x30\xa3\x58\x66\xde\xea\x26"
      "\x5e\x69\x57\x34\x13\x49\x98\x18\x35\x2d\x08\xf2\x17\x2f\x5e\x72\x84\x0e"
      "\x69\xc2\xea\x2f\xbf\xd3\xc0\x3d\x41\x5e\xb3\xc6\xa1\xce\x15\x3e\xa8\x7e"
      "\x21\x9a\x5f\x6f\xf5\x36\x1e\x9c\xa5\x46\xfe\xd8\xfe\xc4\x72\x56\xca\x4f"
      "\xba\x05\x0b\x3e\xfe\xfc\x9c\xca\xf7\x48\xd9\x8f\x1b\x14\x4b\x68\x25\x24"
      "\x98\xda\xf6\x76\x25\x77\x50\x2f\xc2\xdc\xa3\x62\xb3\xd2\xc3\x9e\x9c\x9b"
      "\x27\xd2\xd2\x54\xc1\xe6\x35\xcb\x8e\x1b\x05\xfb\x82\x6a\xd6\x79\x3e\x69"
      "\xe5\x1a\xd6\x4d\x15\xe6\x89\x31\xed\x03\xd7\xaa\x99\x1a\x33\xb2\xbe\x4a"
      "\xa1\x2b\xa1\x20\xf4\x4a\x53\x25\x2b\xd8\x86\x0e\xeb\x7d\xc6\xbd\x0e\x16"
      "\x95\xc3\xd2\x2f\x29\x89\x1b\xcf\x94\xbe\x6d\x09\x66\x55\x2b\xb7\x15\xf2"
      "\x6b\x61\x1b\x42\x98\x04\xe3\xeb\x4e\x3d\x96\x0b\x48\x77\x51\xbd\xf7\xcc"
      "\xc1\x11\xeb\x2d\x52\x80\x8a\x19\x56\x63\x92\xe2\x64\xa8\x10\xce\x9a\xa3"
      "\x58\x9a\x99\x28\xf4\xb9\xe8\x57\x3b\x16\x65\xd1\x83\xe5\xbc\x00\x9e\x51"
      "\xd9\xc6\x64\x9f\xfd\x46\x8b\xa0\x0c\x12\xbb\x7f\x96\x27\xb4\xfc\xad\x48"
      "\xcb\xc8\x2c\x82\x18\xa2\xfa\x2d\x4c\xea\xcb\x97\x40\x41\x18\x31\xdb\x58"
      "\x3b\x6d\xb3\x51\xd8\x61\xc8\xee\x83\x22\xdd\x6a\xd4\x6e\xb2\x06\xa8\x94"
      "\x65\x7b\x0a\x26\x23\xad\x86\x61\xa7\xba\x2e\x69\x63\x27\x0a\xd1\xd6\xa4"
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      "\x92\xab\x23\x48\x4c\xb7\x51\xee\x6e\x22\x09\xff\xb9\xbd\xf2\x4d\xec\x0d"
      "\xd1\x3b\xcf\x1b\x5c\x84\xbf\x88\x2d\x10\x28\xcc\xf7\xf3\x83\x78\x08\x26"
      "\xe5\x2f\x20\x90\x1d\x59\xef\x25\x26\x6d\xb2\x5c\x10\xc6\xa2\x8c\x3c\x22"
      "\x82\x9c\x69\xf6\x2e\x94\xca\x79\x84\x59\x49\x10\x0e\x55\x6a\x48\x00\x82"
      "\xe5\xec\x3b\x9a\x30\x0a\xba\xcd\x8a\x29\x91\x6d\x33\xde\x95\xc9\xb7\xcf"
      "\xb0\x21\x8a\x5f\x1a\x04\x52\xe1\x51\xc2\x28\x12\x85\xb7\x63\xc2\x7b\xd6"
      "\x54\xca\xfd\x1c\x4e\xed\x60\xdf\x4d\x38\xde\x4f\x72\xfd\xe0\x2a\x93\x36"
      "\xa7\x66\x47\x2b\x44\xc4\x3b\x63\x32\x34\xb6\xa3\xf1\x0e\xc8\xa7\x97\xf0"
      "\x25\xec\x7e\xc9\xd7\xa1\xa7\x3c\x6b\x76\x22\x81\x8c\x28\x24\x03\x2d\x6d"
      "\x6b\x52\xc1\xaa\x8a\xa0\xc4\x62\x78\x32\x6a\x47\x9e\xbc\x12\x85\x0d\xb6"
      "\x22\x9d\x79\x6e\x52\x25\xa3\x48\xd5\x8f\xfc\x73\x37\x23\xcb\xdf\xce\xad"
      "\xb3\x7e\xef\x36\x18\x0b\x5c\xd6",
      3824);
  syscall(__NR_ioctl, -1, 0xd000943e, 0x20000300ul);
  syscall(__NR_io_uring_enter, r[0], 0x5fe7, 0, 0ul, 0ul, 0ul);
}
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);
  loop();
  return 0;
}