// https://syzkaller.appspot.com/bug?id=a1954eed3adfde914df9a0a2d0b7d1ecb876072f
// 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 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[1] = {0xffffffffffffffff};

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  setns arguments: [
  //    fd: fd_namespace (resource)
  //    type: ns_type = 0x0 (8 bytes)
  //  ]
  syscall(__NR_setns, /*fd=*/0xc9, /*type=*/0ul);
  //  socket$nl_route arguments: [
  //    domain: const = 0x10 (8 bytes)
  //    type: const = 0x3 (8 bytes)
  //    proto: const = 0x0 (4 bytes)
  //  ]
  //  returns sock_nl_route
  res = syscall(__NR_socket, /*domain=*/0x10ul, /*type=*/3ul, /*proto=*/0);
  if (res != -1)
    r[0] = res;
  //  sendmsg$nl_route arguments: [
  //    fd: sock_nl_route (resource)
  //    msg: ptr[in, msghdr_netlink[netlink_msg_route]] {
  //      msghdr_netlink[netlink_msg_route] {
  //        addr: nil
  //        addrlen: len = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //        vec: ptr[in, iovec[in, netlink_msg_route]] {
  //          iovec[in, netlink_msg_route] {
  //            addr: ptr[in, netlink_msg_route] {
  //              union netlink_msg_route {
  //                ipv4_newrule: netlink_msg_t[const[RTM_NEWRULE, int16],
  //                fib_rule_hdr[AF_INET], fib4_rule_policy] {
  //                  len: len = 0x34 (4 bytes)
  //                  type: const = 0x20 (2 bytes)
  //                  flags: netlink_msg_flags = 0x1 (2 bytes)
  //                  seq: int32 = 0xfffffffc (4 bytes)
  //                  pid: int32 = 0x25dfdbfc (4 bytes)
  //                  payload: fib_rule_hdr[AF_INET] {
  //                    family: const = 0x2 (1 bytes)
  //                    dst_len: rtm_addr_len = 0x0 (1 bytes)
  //                    rcdst_len: rtm_addr_len = 0x10 (1 bytes)
  //                    tos: int8 = 0x0 (1 bytes)
  //                    table: int8 = 0x9 (1 bytes)
  //                    res1: const = 0x0 (1 bytes)
  //                    res2: const = 0x0 (1 bytes)
  //                    action: fr_actions = 0x7 (1 bytes)
  //                    flags: fr_flags = 0xf (4 bytes)
  //                  }
  //                  attrs: array[fib4_rule_policy] {
  //                    union fib4_rule_policy {
  //                      FRA_GENERIC_POLICY: union fib4_rule_policy_generic {
  //                        FRA_IP_PROTO: nlattr_t[const[FRA_IP_PROTO, int16],
  //                        flags[ipv6_types, int8]] {
  //                          nla_len: offsetof = 0x5 (2 bytes)
  //                          nla_type: const = 0x16 (2 bytes)
  //                          payload: ipv6_types = 0x62 (1 bytes)
  //                          size: buffer: {} (length 0x0)
  //                          pad = 0x0 (3 bytes)
  //                        }
  //                      }
  //                    }
  //                    union fib4_rule_policy {
  //                      FRA_SRC: nlattr_t[const[RTA_SRC, int16], ipv4_addr] {
  //                        nla_len: offsetof = 0x8 (2 bytes)
  //                        nla_type: const = 0x2 (2 bytes)
  //                        payload: union ipv4_addr {
  //                          private: int32be = 0xa010100 (4 bytes)
  //                        }
  //                        size: buffer: {} (length 0x0)
  //                      }
  //                    }
  //                    union fib4_rule_policy {
  //                      FRA_FLOW: nlattr_t[const[FRA_FLOW, int16], int32] {
  //                        nla_len: offsetof = 0x8 (2 bytes)
  //                        nla_type: const = 0xb (2 bytes)
  //                        payload: int32 = 0x7f (4 bytes)
  //                        size: buffer: {} (length 0x0)
  //                      }
  //                    }
  //                  }
  //                }
  //              }
  //            }
  //            len: len = 0x34 (8 bytes)
  //          }
  //        }
  //        vlen: const = 0x1 (8 bytes)
  //        ctrl: const = 0x0 (8 bytes)
  //        ctrllen: const = 0x0 (8 bytes)
  //        f: send_flags = 0x0 (4 bytes)
  //        pad = 0x0 (4 bytes)
  //      }
  //    }
  //    f: send_flags = 0x44804 (8 bytes)
  //  ]
  *(uint64_t*)0x200000000140 = 0;
  *(uint32_t*)0x200000000148 = 0;
  *(uint64_t*)0x200000000150 = 0x200000000040;
  *(uint64_t*)0x200000000040 = 0x200000000440;
  *(uint32_t*)0x200000000440 = 0x34;
  *(uint16_t*)0x200000000444 = 0x20;
  *(uint16_t*)0x200000000446 = 1;
  *(uint32_t*)0x200000000448 = 0xfffffffc;
  *(uint32_t*)0x20000000044c = 0x25dfdbfc;
  *(uint8_t*)0x200000000450 = 2;
  *(uint8_t*)0x200000000451 = 0;
  *(uint8_t*)0x200000000452 = 0x10;
  *(uint8_t*)0x200000000453 = 0;
  *(uint8_t*)0x200000000454 = 9;
  *(uint8_t*)0x200000000455 = 0;
  *(uint8_t*)0x200000000456 = 0;
  *(uint8_t*)0x200000000457 = 7;
  *(uint32_t*)0x200000000458 = 0xf;
  *(uint16_t*)0x20000000045c = 5;
  *(uint16_t*)0x20000000045e = 0x16;
  *(uint8_t*)0x200000000460 = 0x62;
  *(uint16_t*)0x200000000464 = 8;
  *(uint16_t*)0x200000000466 = 2;
  *(uint32_t*)0x200000000468 = htobe32(0xa010100);
  *(uint16_t*)0x20000000046c = 8;
  *(uint16_t*)0x20000000046e = 0xb;
  *(uint32_t*)0x200000000470 = 0x7f;
  *(uint64_t*)0x200000000048 = 0x34;
  *(uint64_t*)0x200000000158 = 1;
  *(uint64_t*)0x200000000160 = 0;
  *(uint64_t*)0x200000000168 = 0;
  *(uint32_t*)0x200000000170 = 0;
  syscall(__NR_sendmsg, /*fd=*/r[0], /*msg=*/0x200000000140ul,
          /*f=MSG_BATCH|MSG_NOSIGNAL|MSG_DONTROUTE|MSG_CONFIRM*/ 0x44804ul);
}
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;
}