// https://syzkaller.appspot.com/bug?id=c905c82285226236abc44f3140e9290e96374cab
// 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/mount.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>

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;
}

static long syz_open_procfs(volatile long a0, volatile long a1)
{
  char buf[128];
  memset(buf, 0, sizeof(buf));
  if (a0 == 0) {
    snprintf(buf, sizeof(buf), "/proc/self/%s", (char*)a1);
  } else if (a0 == -1) {
    snprintf(buf, sizeof(buf), "/proc/thread-self/%s", (char*)a1);
  } else {
    snprintf(buf, sizeof(buf), "/proc/self/task/%d/%s", (int)a0, (char*)a1);
  }
  int fd = open(buf, O_RDWR);
  if (fd == -1)
    fd = open(buf, O_RDONLY);
  return fd;
}

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 (;;) {
      sleep_ms(10);
      if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid)
        break;
      if (current_time_ms() - start < 5000)
        continue;
      kill_and_wait(pid, &status);
      break;
    }
  }
}

uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  sendmsg$NFT_BATCH arguments: [
  //    fd: sock_nl_netfilter (resource)
  //    msg: ptr[in, msghdr_netlink[nft_batch_msg]] {
  //      msghdr_netlink[nft_batch_msg] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, nft_batch_msg]] {
  //          iovec[in, nft_batch_msg] {
  //            addr: ptr[inout, array[ANYUNION]] {
  //              array[ANYUNION] {
  //              }
  //            }
  //            len: len = 0xe8 (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x80 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x0 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000400 = 0;
  *(uint32_t*)0x200000000408 = 0;
  *(uint64_t*)0x200000000410 = 0x200000000000;
  *(uint64_t*)0x200000000000 = 0x2000000030c0;
  *(uint64_t*)0x200000000008 = 0xe8;
  *(uint64_t*)0x200000000418 = 1;
  *(uint64_t*)0x200000000420 = 0;
  *(uint64_t*)0x200000000428 = 0;
  *(uint32_t*)0x200000000430 = 0x80;
  syscall(__NR_sendmsg, /*fd=*/(intptr_t)-1, /*msg=*/0x200000000400ul,
          /*f=*/0ul);
  //  mkdirat arguments: [
  //    fd: fd_dir (resource)
  //    path: ptr[in, buffer] {
  //      buffer: {2e 2f 70 72 6f 63 00} (length 0x7)
  //    }
  //    mode: open_mode = 0x1ff (8 bytes)
  //  ]
  memcpy((void*)0x200000000080, "./proc\000", 7);
  syscall(
      __NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x200000000080ul,
      /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IXGRP|S_IWGRP|S_IRGRP|S_IXUSR|S_IWUSR|0x100*/
      0x1fful);
  //  mount arguments: [
  //    src: nil
  //    dst: ptr[in, buffer] {
  //      buffer: {2e 2f 70 72 6f 63 00} (length 0x7)
  //    }
  //    type: ptr[in, buffer] {
  //      buffer: {70 72 6f 63 00} (length 0x5)
  //    }
  //    flags: mount_flags = 0x0 (8 bytes)
  //    data: nil
  //  ]
  memcpy((void*)0x200000000080, "./proc\000", 7);
  memcpy((void*)0x200000000100, "proc\000", 5);
  syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x200000000080ul,
          /*type=*/0x200000000100ul, /*flags=*/0ul, /*data=*/0ul);
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 70 72 6f 63 2f 74 68 72 65 61 64 2d 73 65 6c 66 2f 66
  //      61 69 6c 2d 6e 74 68 00} (length 0x1c)
  //    }
  //    flags: open_flags = 0x2 (4 bytes)
  //    mode: open_mode = 0x0 (2 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x200000000140, "./proc/thread-self/fail-nth\000", 28);
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000140ul,
                /*flags=O_RDWR*/ 2, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  write arguments: [
  //    fd: fd (resource)
  //    buf: ptr[in, buffer] {
  //      buffer: {33} (length 0x1)
  //    }
  //    count: len = 0x4e (8 bytes)
  //  ]
  memset((void*)0x200000000000, 51, 1);
  syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x200000000000ul, /*count=*/0x4eul);
  //  syz_open_procfs arguments: [
  //    pid: pid (resource)
  //    file: nil
  //  ]
  //  returns fd
  syz_open_procfs(/*pid=*/0, /*file=*/0);
  //  socket arguments: [
  //    domain: socket_domain = 0x10 (8 bytes)
  //    type: socket_type = 0x803 (8 bytes)
  //    proto: int32 = 0x0 (4 bytes)
  //  ]
  //  returns sock
  res = syscall(__NR_socket, /*domain=AF_NETLINK*/ 0x10ul,
                /*type=SOCK_NONBLOCK|SOCK_RAW*/ 0x803ul, /*proto=*/0);
  if (res != -1)
    r[1] = res;
  //  ioctl$sock_SIOCETHTOOL arguments: [
  //    fd: sock (resource)
  //    cmd: const = 0x8946 (4 bytes)
  //    arg: ptr[inout, ifreq_dev_t[devnames, ptr[inout, ethtool_cmd_u]]] {
  //      ifreq_dev_t[devnames, ptr[inout, ethtool_cmd_u]] {
  //        ifr_ifrn: buffer: {76 65 74 68 30 5f 74 6f 5f 74 65 61 6d 00 00 00}
  //        (length 0x10) elem: ptr[inout, ethtool_cmd_u] {
  //          union ethtool_cmd_u {
  //            ethtool_cmd: ethtool_cmd {
  //              cmd: ethtool_cmd_flags = 0x2c (4 bytes)
  //              supported: int32 = 0x4 (4 bytes)
  //              advertising: int32 = 0x4 (4 bytes)
  //              speed: int16 = 0x0 (2 bytes)
  //              duplex: int8 = 0x0 (1 bytes)
  //              port: int8 = 0x0 (1 bytes)
  //              phy_address: int8 = 0x0 (1 bytes)
  //              transceiver: int8 = 0x0 (1 bytes)
  //              autoneg: int8 = 0xff (1 bytes)
  //              mdio_support: int8 = 0x0 (1 bytes)
  //              maxtxpkt: int32 = 0x0 (4 bytes)
  //              maxrxpkt: int32 = 0x0 (4 bytes)
  //              speed_hi: int16 = 0x0 (2 bytes)
  //              eth_tp_mdix: int8 = 0x0 (1 bytes)
  //              eth_tp_mdix_ctrl: int8 = 0x0 (1 bytes)
  //              lp_advertising: int32 = 0x0 (4 bytes)
  //              reserved: array[int32] {
  //                int32 = 0x0 (4 bytes)
  //                int32 = 0x3 (4 bytes)
  //              }
  //            }
  //          }
  //        }
  //        pad = 0x0 (16 bytes)
  //      }
  //    }
  //  ]
  memcpy((void*)0x2000000002c0, "veth0_to_team\000\000\000", 16);
  *(uint64_t*)0x2000000002d0 = 0x200000000000;
  *(uint32_t*)0x200000000000 = 0x2c;
  *(uint32_t*)0x200000000004 = 4;
  *(uint32_t*)0x200000000008 = 4;
  *(uint16_t*)0x20000000000c = 0;
  *(uint8_t*)0x20000000000e = 0;
  *(uint8_t*)0x20000000000f = 0;
  *(uint8_t*)0x200000000010 = 0;
  *(uint8_t*)0x200000000011 = 0;
  *(uint8_t*)0x200000000012 = -1;
  *(uint8_t*)0x200000000013 = 0;
  *(uint32_t*)0x200000000014 = 0;
  *(uint32_t*)0x200000000018 = 0;
  *(uint16_t*)0x20000000001c = 0;
  *(uint8_t*)0x20000000001e = 0;
  *(uint8_t*)0x20000000001f = 0;
  *(uint32_t*)0x200000000020 = 0;
  *(uint32_t*)0x200000000024 = 0;
  *(uint32_t*)0x200000000028 = 3;
  syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x8946, /*arg=*/0x2000000002c0ul);
  //  ioctl$sock_inet_SIOCSIFFLAGS arguments: [
  //    fd: sock (resource)
  //    cmd: const = 0x8914 (4 bytes)
  //    arg: ptr[in, ifreq_dev_t[devnames, flags[ifru_flags, int16]]] {
  //      ifreq_dev_t[devnames, flags[ifru_flags, int16]] {
  //        ifr_ifrn: buffer: {76 65 74 68 30 5f 74 6f 5f 74 65 61 6d 00 00 00}
  //        (length 0x10) elem: ifru_flags = 0x800 (2 bytes) pad = 0x0 (22
  //        bytes)
  //      }
  //    }
  //  ]
  memcpy((void*)0x200000000040, "veth0_to_team\000\000\000", 16);
  *(uint16_t*)0x200000000050 = 0x800;
  syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x8914, /*arg=*/0x200000000040ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000,
          /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  loop();
  return 0;
}