syzkaller-repros/linux/319b9f885144d859b49c153c861a5e575a7ace00.c

// kernel BUG at mm/kmsan/kmsan.c:LINE! (3)
// https://syzkaller.appspot.com/bug?id=319b9f885144d859b49c153c861a5e575a7ace00
// status:invalid
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE
#include <endian.h>
#include <errno.h>
#include <errno.h>
#include <fcntl.h>
#include <fcntl.h>
#include <stdarg.h>
#include <stdbool.h>
#include <stdio.h>
#include <sys/stat.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

__attribute__((noreturn)) static void doexit(int status)
{
  volatile unsigned i;
  syscall(__NR_exit_group, status);
  for (i = 0;; i++) {
  }
}
#include <errno.h>
#include <stdarg.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>

const int kFailStatus = 67;
const int kRetryStatus = 69;

static void fail(const char* msg, ...)
{
  int e = errno;
  va_list args;
  va_start(args, msg);
  vfprintf(stderr, msg, args);
  va_end(args);
  fprintf(stderr, " (errno %d)\n", e);
  doexit((e == ENOMEM || e == EAGAIN) ? kRetryStatus : kFailStatus);
}

static void exitf(const char* msg, ...)
{
  int e = errno;
  va_list args;
  va_start(args, msg);
  vfprintf(stderr, msg, args);
  va_end(args);
  fprintf(stderr, " (errno %d)\n", e);
  doexit(kRetryStatus);
}

static void use_temporary_dir()
{
  char tmpdir_template[] = "./syzkaller.XXXXXX";
  char* tmpdir = mkdtemp(tmpdir_template);
  if (!tmpdir)
    fail("failed to mkdtemp");
  if (chmod(tmpdir, 0777))
    fail("failed to chmod");
  if (chdir(tmpdir))
    fail("failed to chdir");
}

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;
  char buf[16];

  fd = open("/proc/thread-self/fail-nth", O_RDWR);
  if (fd == -1)
    exitf("failed to open /proc/thread-self/fail-nth");
  sprintf(buf, "%d", nth + 1);
  if (write(fd, buf, strlen(buf)) != (ssize_t)strlen(buf))
    exitf("failed to write /proc/thread-self/fail-nth");
  return fd;
}

uint64_t r[1] = {0xffffffffffffffff};
void loop()
{
  long res = 0;
  res = syscall(__NR_socket, 0xa, 1, 0);
  if (res != -1)
    r[0] = res;
  *(uint32_t*)0x200000c0 = 1;
  syscall(__NR_setsockopt, r[0], 6, 0x13, 0x200000c0, 4);
  *(uint16_t*)0x20000640 = 0xa;
  *(uint16_t*)0x20000642 = htobe16(0);
  *(uint32_t*)0x20000644 = 0;
  *(uint8_t*)0x20000648 = 0xfe;
  *(uint8_t*)0x20000649 = 0x80;
  *(uint8_t*)0x2000064a = 0;
  *(uint8_t*)0x2000064b = 0;
  *(uint8_t*)0x2000064c = 0;
  *(uint8_t*)0x2000064d = 0;
  *(uint8_t*)0x2000064e = 0;
  *(uint8_t*)0x2000064f = 0;
  *(uint8_t*)0x20000650 = 0;
  *(uint8_t*)0x20000651 = 0;
  *(uint8_t*)0x20000652 = 0;
  *(uint8_t*)0x20000653 = 0;
  *(uint8_t*)0x20000654 = 0;
  *(uint8_t*)0x20000655 = 0;
  *(uint8_t*)0x20000656 = 0;
  *(uint8_t*)0x20000657 = 0xbb;
  *(uint32_t*)0x20000658 = 0;
  *(uint16_t*)0x200006c0 = 0;
  *(uint16_t*)0x200006c2 = 1;
  *(uint32_t*)0x200006c4 = 0;
  memcpy((void*)0x200006c8,
         "\x0d\x77\xbd\xed\x71\x25\x33\x8d\xe4\x71\x45\xb7\x1f\x22\x26\xc0\xb6"
         "\x95\x0f\xeb\xa5\x7b\x7d\x52\xd9\xe6\xd1\x35\x09\xbb\x60\x2e\x48\x18"
         "\x22\x46\x96\xda\xfe\x09\xc2\x5e\xd1\xd5\xe1\xe8\xdd\x95\x25\xd4\x42"
         "\x5e\x2c\x47\x07\xa0\x0f\x8d\xd4\x7a\x4c\x19\xb8\x84\x28\x2e\x4f\x74"
         "\x3e\x00\xc7\xa3\xef\xf5\x99\xb1\x3d\x51\x8d\x10",
         80);
  syscall(__NR_setsockopt, r[0], 6, 0xe, 0x20000640, 0xd8);
  *(uint16_t*)0x20000080 = 0xa;
  *(uint16_t*)0x20000082 = htobe16(0);
  *(uint32_t*)0x20000084 = 0;
  *(uint8_t*)0x20000088 = 0;
  *(uint8_t*)0x20000089 = 0;
  *(uint8_t*)0x2000008a = 0;
  *(uint8_t*)0x2000008b = 0;
  *(uint8_t*)0x2000008c = 0;
  *(uint8_t*)0x2000008d = 0;
  *(uint8_t*)0x2000008e = 0;
  *(uint8_t*)0x2000008f = 0;
  *(uint8_t*)0x20000090 = 0;
  *(uint8_t*)0x20000091 = 0;
  *(uint8_t*)0x20000092 = -1;
  *(uint8_t*)0x20000093 = -1;
  *(uint32_t*)0x20000094 = htobe32(0);
  *(uint32_t*)0x20000098 = 0;
  syscall(__NR_connect, r[0], 0x20000080, 0x1c);
  memcpy((void*)0x20000340, "tls", 4);
  syscall(__NR_setsockopt, r[0], 6, 0x1f, 0x20000340, 4);
  *(uint16_t*)0x20000100 = 0x303;
  *(uint16_t*)0x20000102 = 0x33;
  syscall(__NR_setsockopt, r[0], 0x11a, 1, 0x20000100, 0x28);
  *(uint16_t*)0x20000000 = 0xa;
  *(uint16_t*)0x20000002 = htobe16(0);
  *(uint32_t*)0x20000004 = 0;
  *(uint8_t*)0x20000008 = 0xfe;
  *(uint8_t*)0x20000009 = 0x80;
  *(uint8_t*)0x2000000a = 0;
  *(uint8_t*)0x2000000b = 0;
  *(uint8_t*)0x2000000c = 0;
  *(uint8_t*)0x2000000d = 0;
  *(uint8_t*)0x2000000e = 0;
  *(uint8_t*)0x2000000f = 0;
  *(uint8_t*)0x20000010 = 0;
  *(uint8_t*)0x20000011 = 0;
  *(uint8_t*)0x20000012 = 0;
  *(uint8_t*)0x20000013 = 0;
  *(uint8_t*)0x20000014 = 0;
  *(uint8_t*)0x20000015 = 0;
  *(uint8_t*)0x20000016 = 0;
  *(uint8_t*)0x20000017 = 0xbb;
  *(uint32_t*)0x20000018 = 0;
  write_file("/sys/kernel/debug/failslab/ignore-gfp-wait", "N");
  write_file("/sys/kernel/debug/fail_futex/ignore-private", "N");
  inject_fault(0);
  syscall(__NR_sendto, r[0], 0x200005c0, 0xfffffdef, 0, 0x20000000, 0x1c);
}

int main()
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  use_temporary_dir();
  loop();
  return 0;
}