// https://syzkaller.appspot.com/bug?id=1c0bea493ac82d5f3642dd27710c4492463efa83
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <dirent.h>
#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <setjmp.h>
#include <signal.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.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_bpf
#define __NR_bpf 321
#endif

static unsigned long long procid;

static __thread int clone_ongoing;
static __thread int skip_segv;
static __thread jmp_buf segv_env;

static void segv_handler(int sig, siginfo_t* info, void* ctx)
{
  if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) {
    exit(sig);
  }
  uintptr_t addr = (uintptr_t)info->si_addr;
  const uintptr_t prog_start = 1 << 20;
  const uintptr_t prog_end = 100 << 20;
  int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0;
  int valid = addr < prog_start || addr > prog_end;
  if (skip && valid) {
    _longjmp(segv_env, 1);
  }
  exit(sig);
}

static void install_segv_handler(void)
{
  struct sigaction sa;
  memset(&sa, 0, sizeof(sa));
  sa.sa_handler = SIG_IGN;
  syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8);
  syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8);
  memset(&sa, 0, sizeof(sa));
  sa.sa_sigaction = segv_handler;
  sa.sa_flags = SA_NODEFER | SA_SIGINFO;
  sigaction(SIGSEGV, &sa, NULL);
  sigaction(SIGBUS, &sa, NULL);
}

#define NONFAILING(...)                                                        \
  ({                                                                           \
    int ok = 1;                                                                \
    __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    if (_setjmp(segv_env) == 0) {                                              \
      __VA_ARGS__;                                                             \
    } else                                                                     \
      ok = 0;                                                                  \
    __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST);                       \
    ok;                                                                        \
  })

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

void execute_one(void)
{
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  socket arguments: [
  //    domain: socket_domain = 0x28 (8 bytes)
  //    type: socket_type = 0x5 (8 bytes)
  //    proto: int32 = 0x0 (4 bytes)
  //  ]
  //  returns sock
  res = syscall(__NR_socket, /*domain=AF_VSOCK*/ 0x28ul,
                /*type=SOCK_SEQPACKET*/ 5ul, /*proto=*/0);
  if (res != -1)
    r[0] = res;
  //  connect$vsock_stream arguments: [
  //    fd: sock_vsock_stream (resource)
  //    addr: ptr[in, sockaddr_vm] {
  //      sockaddr_vm {
  //        svm_family: const = 0x28 (2 bytes)
  //        svm_reserved1: const = 0x0 (2 bytes)
  //        svm_port: vmaddr_port = 0x0 (4 bytes)
  //        svm_cid: union vmaddr_cid {
  //          any: const = 0xffffffff (4 bytes)
  //        }
  //        svm_zero: const = 0x0 (4 bytes)
  //      }
  //    }
  //    addrlen: len = 0x10 (8 bytes)
  //  ]
  NONFAILING(*(uint16_t*)0x200000000080 = 0x28);
  NONFAILING(*(uint16_t*)0x200000000082 = 0);
  NONFAILING(*(uint32_t*)0x200000000084 = 0);
  NONFAILING(*(uint32_t*)0x200000000088 = -1);
  NONFAILING(*(uint32_t*)0x20000000008c = 0);
  syscall(__NR_connect, /*fd=*/r[0], /*addr=*/0x200000000080ul,
          /*addrlen=*/0x10ul);
  //  bpf$BPF_PROG_RAW_TRACEPOINT_LOAD arguments: [
  //    cmd: const = 0x5 (8 bytes)
  //    arg: ptr[in, bpf_prog_t[flags[bpf_raw_tracepoint_prog_types, int32],
  //    const[0, int32], const[0, int32], const[0, int32]]] {
  //      bpf_prog_t[flags[bpf_raw_tracepoint_prog_types, int32], const[0,
  //      int32], const[0, int32], const[0, int32]] {
  //        type: bpf_raw_tracepoint_prog_types = 0x18 (4 bytes)
  //        ninsn: bytesize8 = 0x5 (4 bytes)
  //        insns: ptr[inout, array[ANYUNION]] {
  //          array[ANYUNION] {
  //            union ANYUNION {
  //              ANYBLOB: buffer: {18 01 00 00 21 00 00 00 00 00 00 00 3b 81 00
  //              00 85 00 00 00 6d 00 00 00 85 00 00 00 50 00 00 00 95} (length
  //              0x21)
  //            }
  //          }
  //        }
  //        license: ptr[in, buffer] {
  //          buffer: {73 79 7a 6b 61 6c 6c 65 72 00} (length 0xa)
  //        }
  //        loglev: int32 = 0x0 (4 bytes)
  //        logsize: len = 0x0 (4 bytes)
  //        log: nil
  //        kern_version: bpf_kern_version = 0x0 (4 bytes)
  //        flags: bpf_prog_load_flags = 0x4 (4 bytes)
  //        prog_name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00}
  //        (length 0x10) prog_ifindex: ifindex (resource) expected_attach_type:
  //        const = 0x2 (4 bytes) btf_fd: fd_btf (resource) func_info_rec_size:
  //        const = 0x8 (4 bytes) func_info: nil func_info_cnt: len = 0x0 (4
  //        bytes) line_info_rec_size: const = 0x10 (4 bytes) line_info: nil
  //        line_info_cnt: len = 0x0 (4 bytes)
  //        attach_btf_id: const = 0x0 (4 bytes)
  //        attach_prog_fd: const = 0x0 (4 bytes)
  //        core_relo_cnt: len = 0x0 (4 bytes)
  //        fd_array: nil
  //        core_relos: nil
  //        core_relo_rec_size: const = 0x10 (4 bytes)
  //        log_true_size: int32 = 0x0 (4 bytes)
  //        prog_token_fd: union
  //        _bpf_prog_t[flags[bpf_raw_tracepoint_prog_types, int32], const[0,
  //        int32], const[0, int32], const[0, int32]]_prog_token_fd_wrapper {
  //          void: buffer: {} (length 0x0)
  //        }
  //        pad: union _bpf_prog_t[flags[bpf_raw_tracepoint_prog_types, int32],
  //        const[0, int32], const[0, int32], const[0, int32]]_pad_wrapper {
  //          value: const = 0x0 (4 bytes)
  //        }
  //      }
  //    }
  //    size: len = 0x94 (8 bytes)
  //  ]
  //  returns fd_bpf_prog_raw_tracepoint
  NONFAILING(*(uint32_t*)0x200000000180 = 0x18);
  NONFAILING(*(uint32_t*)0x200000000184 = 5);
  NONFAILING(*(uint64_t*)0x200000000188 = 0x200000000480);
  NONFAILING(memcpy(
      (void*)0x200000000480,
      "\x18\x01\x00\x00\x21\x00\x00\x00\x00\x00\x00\x00\x3b\x81\x00\x00\x85\x00"
      "\x00\x00\x6d\x00\x00\x00\x85\x00\x00\x00\x50\x00\x00\x00\x95",
      33));
  NONFAILING(*(uint64_t*)0x200000000190 = 0x200000000040);
  NONFAILING(memcpy((void*)0x200000000040, "syzkaller\000", 10));
  NONFAILING(*(uint32_t*)0x200000000198 = 0);
  NONFAILING(*(uint32_t*)0x20000000019c = 0);
  NONFAILING(*(uint64_t*)0x2000000001a0 = 0);
  NONFAILING(*(uint32_t*)0x2000000001a8 = 0);
  NONFAILING(*(uint32_t*)0x2000000001ac = 4);
  NONFAILING(memset((void*)0x2000000001b0, 0, 16));
  NONFAILING(*(uint32_t*)0x2000000001c0 = 0);
  NONFAILING(*(uint32_t*)0x2000000001c4 = 2);
  NONFAILING(*(uint32_t*)0x2000000001c8 = -1);
  NONFAILING(*(uint32_t*)0x2000000001cc = 8);
  NONFAILING(*(uint64_t*)0x2000000001d0 = 0);
  NONFAILING(*(uint32_t*)0x2000000001d8 = 0);
  NONFAILING(*(uint32_t*)0x2000000001dc = 0x10);
  NONFAILING(*(uint64_t*)0x2000000001e0 = 0);
  NONFAILING(*(uint32_t*)0x2000000001e8 = 0);
  NONFAILING(*(uint32_t*)0x2000000001ec = 0);
  NONFAILING(*(uint32_t*)0x2000000001f0 = 0);
  NONFAILING(*(uint32_t*)0x2000000001f4 = 0);
  NONFAILING(*(uint64_t*)0x2000000001f8 = 0);
  NONFAILING(*(uint64_t*)0x200000000200 = 0);
  NONFAILING(*(uint32_t*)0x200000000208 = 0x10);
  NONFAILING(*(uint32_t*)0x20000000020c = 0);
  NONFAILING(*(uint32_t*)0x200000000210 = 0);
  res =
      syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000000180ul, /*size=*/0x94ul);
  if (res != -1)
    r[1] = res;
  //  close arguments: [
  //    fd: fd (resource)
  //  ]
  syscall(__NR_close, /*fd=*/r[1]);
  //  bpf$PROG_LOAD_XDP arguments: [
  //    cmd: const = 0x5 (8 bytes)
  //    arg: ptr[in, bpf_prog_t[const[BPF_PROG_TYPE_XDP, int32], const[BPF_XDP,
  //    int32], const[0, int32], const[0, int32]]] {
  //      bpf_prog_t[const[BPF_PROG_TYPE_XDP, int32], const[BPF_XDP, int32],
  //      const[0, int32], const[0, int32]] {
  //        type: const = 0x18 (4 bytes)
  //        ninsn: bytesize8 = 0x6 (4 bytes)
  //        insns: ptr[inout, array[ANYUNION]] {
  //          array[ANYUNION] {
  //            union ANYUNION {
  //              ANYBLOB: buffer: {18 00 00 00 00 00 00 00 00 00 00 00 ff ff ff
  //              80 e5 00 02 00 00 00 00 00 c5 00 fc ff 00 00 00 00 7f 00 fe ff
  //              d1 00 00 00 95} (length 0x29)
  //            }
  //          }
  //        }
  //        license: ptr[in, buffer] {
  //          buffer: {47 50 4c 00} (length 0x4)
  //        }
  //        loglev: int32 = 0x5 (4 bytes)
  //        logsize: len = 0x0 (4 bytes)
  //        log: nil
  //        kern_version: bpf_kern_version = 0x0 (4 bytes)
  //        flags: bpf_prog_load_flags = 0x8 (4 bytes)
  //        prog_name: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00}
  //        (length 0x10) prog_ifindex: ifindex (resource) expected_attach_type:
  //        const = 0x25 (4 bytes) btf_fd: fd_btf (resource) func_info_rec_size:
  //        const = 0x8 (4 bytes) func_info: nil func_info_cnt: len = 0x0 (4
  //        bytes) line_info_rec_size: const = 0x10 (4 bytes) line_info: nil
  //        line_info_cnt: len = 0x0 (4 bytes)
  //        attach_btf_id: const = 0x0 (4 bytes)
  //        attach_prog_fd: const = 0x0 (4 bytes)
  //        core_relo_cnt: len = 0x0 (4 bytes)
  //        fd_array: nil
  //        core_relos: nil
  //        core_relo_rec_size: const = 0x10 (4 bytes)
  //        log_true_size: int32 = 0xffffff6f (4 bytes)
  //        prog_token_fd: union _bpf_prog_t[const[BPF_PROG_TYPE_XDP, int32],
  //        const[BPF_XDP, int32], const[0, int32], const[0,
  //        int32]]_prog_token_fd_wrapper {
  //          void: buffer: {} (length 0x0)
  //        }
  //        pad: union _bpf_prog_t[const[BPF_PROG_TYPE_XDP, int32],
  //        const[BPF_XDP, int32], const[0, int32], const[0, int32]]_pad_wrapper
  //        {
  //          value: const = 0x0 (4 bytes)
  //        }
  //      }
  //    }
  //    size: len = 0x94 (8 bytes)
  //  ]
  //  returns fd_bpf_prog_xdp
  NONFAILING(*(uint32_t*)0x200000000600 = 0x18);
  NONFAILING(*(uint32_t*)0x200000000604 = 6);
  NONFAILING(*(uint64_t*)0x200000000608 = 0x2000000001c0);
  NONFAILING(memcpy((void*)0x2000000001c0,
                    "\x18\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xff\xff"
                    "\xff\x80\xe5\x00\x02\x00\x00\x00\x00\x00\xc5\x00\xfc\xff"
                    "\x00\x00\x00\x00\x7f\x00\xfe\xff\xd1\x00\x00\x00\x95",
                    41));
  NONFAILING(*(uint64_t*)0x200000000610 = 0x2000000000c0);
  NONFAILING(memcpy((void*)0x2000000000c0, "GPL\000", 4));
  NONFAILING(*(uint32_t*)0x200000000618 = 5);
  NONFAILING(*(uint32_t*)0x20000000061c = 0);
  NONFAILING(*(uint64_t*)0x200000000620 = 0);
  NONFAILING(*(uint32_t*)0x200000000628 = 0);
  NONFAILING(*(uint32_t*)0x20000000062c = 8);
  NONFAILING(memset((void*)0x200000000630, 0, 16));
  NONFAILING(*(uint32_t*)0x200000000640 = 0);
  NONFAILING(*(uint32_t*)0x200000000644 = 0x25);
  NONFAILING(*(uint32_t*)0x200000000648 = -1);
  NONFAILING(*(uint32_t*)0x20000000064c = 8);
  NONFAILING(*(uint64_t*)0x200000000650 = 0);
  NONFAILING(*(uint32_t*)0x200000000658 = 0);
  NONFAILING(*(uint32_t*)0x20000000065c = 0x10);
  NONFAILING(*(uint64_t*)0x200000000660 = 0);
  NONFAILING(*(uint32_t*)0x200000000668 = 0);
  NONFAILING(*(uint32_t*)0x20000000066c = 0);
  NONFAILING(*(uint32_t*)0x200000000670 = 0);
  NONFAILING(*(uint32_t*)0x200000000674 = 0);
  NONFAILING(*(uint64_t*)0x200000000678 = 0);
  NONFAILING(*(uint64_t*)0x200000000680 = 0);
  NONFAILING(*(uint32_t*)0x200000000688 = 0x10);
  NONFAILING(*(uint32_t*)0x20000000068c = 0xffffff6f);
  NONFAILING(*(uint32_t*)0x200000000690 = 0);
  syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x200000000600ul, /*size=*/0x94ul);
  //  bpf$BPF_RAW_TRACEPOINT_OPEN arguments: [
  //    cmd: const = 0x11 (8 bytes)
  //    arg: ptr[in, bpf_raw_tracepoint] {
  //      bpf_raw_tracepoint {
  //        name: ptr[in, buffer] {
  //          buffer: {76 69 72 74 69 6f 5f 74 72 61 6e 73 70 6f 72 74 5f 61 6c
  //          6c 6f 63 5f 70 6b 74 00} (length 0x1b)
  //        }
  //        prog_fd: fd_bpf_prog_raw_tracepoint (resource)
  //        pad: const = 0x0 (4 bytes)
  //        cookie: int64 = 0x0 (8 bytes)
  //      }
  //    }
  //    size: len = 0x18 (8 bytes)
  //  ]
  //  returns fd_perf_base
  NONFAILING(*(uint64_t*)0x2000000000c0 = 0x200000000040);
  NONFAILING(
      memcpy((void*)0x200000000040, "virtio_transport_alloc_pkt\000", 27));
  NONFAILING(*(uint32_t*)0x2000000000c8 = r[1]);
  NONFAILING(*(uint32_t*)0x2000000000cc = 0);
  NONFAILING(*(uint64_t*)0x2000000000d0 = 0);
  syscall(__NR_bpf, /*cmd=*/0x11ul, /*arg=*/0x2000000000c0ul, /*size=*/0x18ul);
}
int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul,
          /*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=*/0x1000ul, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  const char* reason;
  (void)reason;
  install_segv_handler();
  for (procid = 0; procid < 5; procid++) {
    if (fork() == 0) {
      loop();
    }
  }
  sleep(1000000);
  return 0;
}