// https://syzkaller.appspot.com/bug?id=6a4363e107e4a2a827af028b12b9adfa20792597
// 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 < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[1] = {0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  *(uint32_t*)0x20000244 = 0;
  *(uint32_t*)0x20000248 = 0;
  *(uint32_t*)0x2000024c = 0;
  *(uint32_t*)0x20000250 = 0;
  *(uint32_t*)0x20000258 = -1;
  memset((void*)0x2000025c, 0, 12);
  res = -1;
  res = syz_io_uring_setup(0x4636, 0x20000240, 0x20002000, 0x20004000,
                           0x20000100, 0x20000040);
  if (res != -1)
    r[0] = res;
  *(uint64_t*)0x20001700 = 0;
  *(uint64_t*)0x20001708 = 8;
  *(uint64_t*)0x20001710 = 0xffffffffffffff2c;
  *(uint64_t*)0x20001718 = 0x58c2;
  *(uint64_t*)0x20001720 = 0;
  *(uint64_t*)0x20001728 = 0x20;
  *(uint64_t*)0x20001730 = 0x800;
  *(uint64_t*)0x20001738 = 0x7fffffff;
  *(uint64_t*)0x20001f28 = 0;
  *(uint64_t*)0x20001f30 = 8;
  *(uint64_t*)0x20001f38 = 3;
  *(uint64_t*)0x20001f40 = 0x45f;
  *(uint64_t*)0x20001f48 = 0xffffffff;
  *(uint64_t*)0x20001f50 = 0x40;
  *(uint64_t*)0x20001f58 = 2;
  *(uint64_t*)0x20001f60 = 4;
  *(uint64_t*)0x20001f68 = 0x598;
  *(uint64_t*)0x20001f70 = 6;
  *(uint64_t*)0x20001f78 = 4;
  *(uint64_t*)0x20001f80 = 0x100;
  *(uint64_t*)0x20001f88 = 0x1000;
  *(uint64_t*)0x20001f90 = 5;
  *(uint64_t*)0x20001f98 = 0xcf;
  *(uint64_t*)0x20001fa0 = 0x7f;
  *(uint64_t*)0x20001fa8 = 1;
  *(uint64_t*)0x20001fb0 = 0xd734;
  *(uint64_t*)0x20001fb8 = 0x24f787af;
  *(uint64_t*)0x20001fc0 = 6;
  *(uint64_t*)0x20001fc8 = -1;
  *(uint64_t*)0x20001fd0 = 0x3f;
  *(uint64_t*)0x20001fd8 = 3;
  *(uint64_t*)0x20001fe0 = 0x8b5;
  *(uint64_t*)0x20001fe8 = 2;
  *(uint64_t*)0x20001ff0 = 3;
  *(uint64_t*)0x20001ff8 = 1;
  *(uint64_t*)0x20002000 = 5;
  *(uint64_t*)0x20002008 = 3;
  *(uint64_t*)0x20002010 = 0xffffffffffffff5e;
  *(uint64_t*)0x20002018 = 2;
  *(uint64_t*)0x20002020 = 0x67fc;
  *(uint64_t*)0x20002028 = 0x80000001;
  *(uint64_t*)0x20002030 = 4;
  *(uint64_t*)0x20002038 = -1;
  *(uint64_t*)0x20002040 = 3;
  *(uint64_t*)0x20002048 = 0x7f;
  *(uint64_t*)0x20002050 = 0x2d7;
  *(uint64_t*)0x20002058 = 1;
  *(uint64_t*)0x20002060 = 7;
  *(uint64_t*)0x20002068 = 1;
  *(uint64_t*)0x20002070 = 6;
  *(uint64_t*)0x20002078 = 2;
  *(uint64_t*)0x20002080 = 0x401;
  *(uint64_t*)0x20002088 = 0xe5;
  *(uint64_t*)0x20002090 = 6;
  *(uint64_t*)0x20002098 = 0x400;
  *(uint64_t*)0x200020a0 = 0xfffffffffffffffb;
  *(uint64_t*)0x200020a8 = 7;
  *(uint64_t*)0x200020b0 = 0xcfb;
  *(uint64_t*)0x200020b8 = 4;
  *(uint64_t*)0x200020c0 = 4;
  *(uint64_t*)0x200020c8 = 0xb1ae;
  *(uint64_t*)0x200020d0 = 0x1000;
  *(uint64_t*)0x200020d8 = 0x400;
  *(uint64_t*)0x200020e0 = 7;
  *(uint64_t*)0x200020e8 = 0x196812b4;
  *(uint64_t*)0x200020f0 = 9;
  *(uint64_t*)0x200020f8 = 4;
  *(uint64_t*)0x20002100 = 0xffff;
  *(uint64_t*)0x20002108 = 8;
  *(uint64_t*)0x20002110 = 4;
  *(uint64_t*)0x20002118 = 1;
  *(uint64_t*)0x20002120 = 0x7e0eb64f;
  syscall(__NR_ioctl, -1, 0xca289435, 0x20001700ul);
  syscall(__NR_io_uring_enter, r[0], 0x2fe, 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;
}