// https://syzkaller.appspot.com/bug?id=62ba40e8539c452b2574e8d48b08a43d04c22d96
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#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/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <unistd.h>

#ifndef __NR_mkdirat
#define __NR_mkdirat 34
#endif
#ifndef __NR_mmap
#define __NR_mmap 222
#endif
#ifndef __NR_mount
#define __NR_mount 40
#endif
#ifndef __NR_openat
#define __NR_openat 56
#endif
#ifndef __NR_read
#define __NR_read 63
#endif

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 setup_sysctl()
{
  int cad_pid = fork();
  if (cad_pid < 0)
    exit(1);
  if (cad_pid == 0) {
    for (;;)
      sleep(100);
  }
  char tmppid[32];
  snprintf(tmppid, sizeof(tmppid), "%d", cad_pid);
  struct {
    const char* name;
    const char* data;
  } files[] = {
      {"/proc/sys/kernel/hung_task_check_interval_secs", "20"},
      {"/proc/sys/net/core/bpf_jit_kallsyms", "1"},
      {"/proc/sys/net/core/bpf_jit_harden", "0"},
      {"/proc/sys/kernel/kptr_restrict", "0"},
      {"/proc/sys/kernel/softlockup_all_cpu_backtrace", "1"},
      {"/proc/sys/fs/mount-max", "100"},
      {"/proc/sys/vm/oom_dump_tasks", "0"},
      {"/proc/sys/debug/exception-trace", "0"},
      {"/proc/sys/kernel/printk", "7 4 1 3"},
      {"/proc/sys/kernel/keys/gc_delay", "1"},
      {"/proc/sys/vm/oom_kill_allocating_task", "1"},
      {"/sys/kernel/debug/failslab/task-filter", "Y"},
      {"/sys/kernel/debug/fail_page_alloc/task-filter", "Y"},
      {"/sys/kernel/debug/fail_futex/task-filter", "Y"},
      {"/sys/kernel/debug/fail_usercopy/task-filter", "Y"},
      {"/sys/kernel/debug/fail_make_request/task-filter", "Y"},
      {"/sys/kernel/debug/fail_io_timeout/task-filter", "Y"},
      {"/sys/kernel/debug/fail_iommufd/task-filter", "Y"},
      {"/proc/sys/kernel/ctrl-alt-del", "0"},
      {"/proc/sys/kernel/cad_pid", tmppid},
  };
  for (size_t i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
    if (!write_file(files[i].name, files[i].data)) {
    }
  }
  kill(cad_pid, SIGKILL);
  while (waitpid(cad_pid, NULL, 0) != cad_pid)
    ;
}

uint64_t r[1] = {0xffffffffffffffff};

int main(void)
{
  syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  syscall(__NR_mmap, /*addr=*/0x20000000ul, /*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=*/0x21000000ul, /*len=*/0x1000, /*prot=*/0ul,
          /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul,
          /*fd=*/(intptr_t)-1, /*offset=*/0ul);
  setup_sysctl();
  const char* reason;
  (void)reason;
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  mkdirat arguments: [
  //    fd: fd_dir (resource)
  //    path: ptr[in, buffer] {
  //      buffer: {2e 2f 63 6f 6e 66 69 67 00} (length 0x9)
  //    }
  //    mode: open_mode = 0x777 (8 bytes)
  //  ]
  memcpy((void*)0x20000000, "./config\000", 9);
  syscall(__NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x20000000ul,
          /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IWGRP|S_IRGRP|S_IXUSR|S_IRUSR|0x600*/
          0x777ul);
  //  mount arguments: [
  //    src: nil
  //    dst: ptr[in, buffer] {
  //      buffer: {2e 2f 63 6f 6e 66 69 67 00} (length 0x9)
  //    }
  //    type: ptr[in, buffer] {
  //      buffer: {63 6f 6e 66 69 67 66 73 00} (length 0x9)
  //    }
  //    flags: mount_flags = 0x0 (8 bytes)
  //    data: nil
  //  ]
  memcpy((void*)0x20000000, "./config\000", 9);
  memcpy((void*)0x20000040, "configfs\000", 9);
  syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x20000000ul, /*type=*/0x20000040ul,
          /*flags=*/0ul, /*data=*/0ul);
  //  mkdirat arguments: [
  //    fd: fd_dir (resource)
  //    path: ptr[in, buffer] {
  //      buffer: {2e 2f 63 6f 6e 66 69 67 2f 75 73 62 5f 67 61 64 67 65 74 2f
  //      67 31 00} (length 0x17)
  //    }
  //    mode: open_mode = 0x777 (8 bytes)
  //  ]
  memcpy((void*)0x200000c0, "./config/usb_gadget/g1\000", 23);
  syscall(__NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x200000c0ul,
          /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IWGRP|S_IRGRP|S_IXUSR|S_IRUSR|0x600*/
          0x777ul);
  //  mkdirat arguments: [
  //    fd: fd_dir (resource)
  //    path: ptr[in, buffer] {
  //      buffer: {2e 2f 63 6f 6e 66 69 67 2f 75 73 62 5f 67 61 64 67 65 74 2f
  //      67 31 2f 66 75 6e 63 74 69 6f 6e 73 2f 70 68 6f 6e 65 74 2e 75 73 62
  //      30 00} (length 0x2d)
  //    }
  //    mode: open_mode = 0x777 (8 bytes)
  //  ]
  memcpy((void*)0x20000140, "./config/usb_gadget/g1/functions/phonet.usb0\000",
         45);
  syscall(__NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x20000140ul,
          /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IWGRP|S_IRGRP|S_IXUSR|S_IRUSR|0x600*/
          0x777ul);
  //  openat arguments: [
  //    fd: fd_dir (resource)
  //    file: ptr[in, buffer] {
  //      buffer: {2e 2f 63 6f 6e 66 69 67 2f 75 73 62 5f 67 61 64 67 65 74 2f
  //      67 31 2f 66 75 6e 63 74 69 6f 6e 73 2f 70 68 6f 6e 65 74 2e 75 73 62
  //      30 2f 69 66 6e 61 6d 65 00} (length 0x34)
  //    }
  //    flags: open_flags = 0x0 (4 bytes)
  //    mode: open_mode = 0x0 (2 bytes)
  //  ]
  //  returns fd
  memcpy((void*)0x20000180,
         "./config/usb_gadget/g1/functions/phonet.usb0/ifname\000", 52);
  res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000180ul,
                /*flags=*/0, /*mode=*/0);
  if (res != -1)
    r[0] = res;
  //  read arguments: [
  //    fd: fd (resource)
  //    buf: nil
  //    count: len = 0x0 (8 bytes)
  //  ]
  syscall(__NR_read, /*fd=*/r[0], /*buf=*/0ul, /*count=*/0ul);
  return 0;
}