// https://syzkaller.appspot.com/bug?id=f11774dabfe0c3f2249677224387bfca43f0e9b6
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <errno.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

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 int inject_fault(int nth)
{
  int fd;
  fd = open("/proc/thread-self/fail-nth", O_RDWR);
  if (fd == -1)
    exit(1);
  char buf[16];
  sprintf(buf, "%d", nth);
  if (write(fd, buf, strlen(buf)) != (ssize_t)strlen(buf))
    exit(1);
  return fd;
}

static const char* setup_fault()
{
  int fd = open("/proc/self/make-it-fail", O_WRONLY);
  if (fd == -1)
    return "CONFIG_FAULT_INJECTION is not enabled";
  close(fd);
  fd = open("/proc/thread-self/fail-nth", O_WRONLY);
  if (fd == -1)
    return "kernel does not have systematic fault injection support";
  close(fd);
  static struct {
    const char* file;
    const char* val;
    bool fatal;
  } files[] = {
      {"/sys/kernel/debug/failslab/ignore-gfp-wait", "N", true},
      {"/sys/kernel/debug/fail_futex/ignore-private", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/ignore-gfp-highmem", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/ignore-gfp-wait", "N", false},
      {"/sys/kernel/debug/fail_page_alloc/min-order", "0", false},
  };
  unsigned i;
  for (i = 0; i < sizeof(files) / sizeof(files[0]); i++) {
    if (!write_file(files[i].file, files[i].val)) {
      if (files[i].fatal)
        return "failed to write fault injection file";
    }
  }
  return NULL;
}

uint64_t r[2] = {0xffffffffffffffff, 0x0};

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;
  if ((reason = setup_fault()))
    printf("the reproducer may not work as expected: fault injection setup "
           "failed: %s\n",
           reason);
  intptr_t res = 0;
  if (write(1, "executing program\n", sizeof("executing program\n") - 1)) {
  }
  //  socket$inet6_sctp arguments: [
  //    domain: const = 0xa (8 bytes)
  //    type: sctp_socket_type = 0x5 (8 bytes)
  //    proto: const = 0x84 (4 bytes)
  //  ]
  //  returns sock_sctp6
  res = syscall(__NR_socket, /*domain=*/0xaul, /*type=SOCK_SEQPACKET*/ 5ul,
                /*proto=*/0x84);
  if (res != -1)
    r[0] = res;
  //  shutdown arguments: [
  //    fd: sock (resource)
  //    how: shutdown_flags = 0x0 (8 bytes)
  //  ]
  syscall(__NR_shutdown, /*fd=*/r[0], /*how=*/0ul);
  //  getsockopt$inet_sctp6_SCTP_SOCKOPT_CONNECTX3 arguments: [
  //    fd: sock_sctp6 (resource)
  //    level: const = 0x84 (4 bytes)
  //    opt: const = 0x6f (4 bytes)
  //    val: ptr[inout, sctp_getaddrs_old] {
  //      sctp_getaddrs_old {
  //        assoc_id: assoc_id (resource)
  //        addr_num: bytesize = 0x10 (4 bytes)
  //        addrs: ptr[in, array[sockaddr_sctp]] {
  //          array[sockaddr_sctp] {
  //            union sockaddr_sctp {
  //              in: sockaddr_in {
  //                family: const = 0x2 (2 bytes)
  //                port: int16be = 0x4e23 (2 bytes)
  //                addr: union ipv4_addr {
  //                  rand_addr: int32be = 0x64010100 (4 bytes)
  //                }
  //                pad = 0x0 (8 bytes)
  //              }
  //            }
  //          }
  //        }
  //      }
  //    }
  //    len: ptr[inout, len] {
  //      len = 0x10 (4 bytes)
  //    }
  //  ]
  *(uint32_t*)0x200000000200 = 0;
  *(uint32_t*)0x200000000204 = 0x10;
  *(uint64_t*)0x200000000208 = 0x2000000001c0;
  *(uint16_t*)0x2000000001c0 = 2;
  *(uint16_t*)0x2000000001c2 = htobe16(0x4e23);
  *(uint32_t*)0x2000000001c4 = htobe32(0x64010100);
  *(uint32_t*)0x200000000140 = 0x10;
  res = syscall(__NR_getsockopt, /*fd=*/r[0], /*level=*/0x84, /*opt=*/0x6f,
                /*val=*/0x200000000200ul, /*len=*/0x200000000140ul);
  if (res != -1)
    r[1] = *(uint32_t*)0x200000000200;
  //  getsockopt$inet_sctp6_SCTP_PRIMARY_ADDR arguments: [
  //    fd: sock_sctp6 (resource)
  //    level: const = 0x84 (4 bytes)
  //    opt: const = 0x7a (4 bytes)
  //    val: ptr[inout, sctp_prim] {
  //      sctp_prim {
  //        ssp_assoc_id: assoc_id (resource)
  //        ssp_addr: union sockaddr_storage_sctp {
  //          in6: sockaddr_storage_in6 {
  //            addr: sockaddr_in6 {
  //              family: const = 0xa (2 bytes)
  //              port: int16be = 0x3 (2 bytes)
  //              flow: int32be = 0x4 (4 bytes)
  //              addr: union ipv6_addr {
  //                mcast1: ipv6_addr_multicast1 {
  //                  a0: const = 0xff (1 bytes)
  //                  a1: const = 0x1 (1 bytes)
  //                  a2: buffer: {00 00 00 00 00 00 00 00 00 00 00 00 00}
  //                  (length 0xd) a3: const = 0x1 (1 bytes)
  //                }
  //              }
  //              scope: int32 = 0x0 (4 bytes)
  //            }
  //            pad = 0x0 (4 bytes)
  //            pad = 0x0 (96 bytes)
  //          }
  //        }
  //      }
  //    }
  //    len: ptr[inout, len] {
  //      len = 0x84 (4 bytes)
  //    }
  //  ]
  *(uint32_t*)0x200000000340 = r[1];
  *(uint16_t*)0x200000000344 = 0xa;
  *(uint16_t*)0x200000000346 = htobe16(3);
  *(uint32_t*)0x200000000348 = htobe32(4);
  *(uint8_t*)0x20000000034c = -1;
  *(uint8_t*)0x20000000034d = 1;
  memset((void*)0x20000000034e, 0, 13);
  *(uint8_t*)0x20000000035b = 1;
  *(uint32_t*)0x20000000035c = 0;
  *(uint32_t*)0x200000000040 = 0x84;
  inject_fault(11);
  syscall(__NR_getsockopt, /*fd=*/r[0], /*level=*/0x84, /*opt=*/0x7a,
          /*val=*/0x200000000340ul, /*len=*/0x200000000040ul);
  return 0;
}