syzkaller-repros/linux/f39a4688594152c928093aa43e008bee70b55ca4.c

// KASAN: slab-out-of-bounds Read in sctp_send_reset_streams
// https://syzkaller.appspot.com/bug?id=f39a4688594152c928093aa43e008bee70b55ca4
// status:fixed
// autogenerated by syzkaller (http://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <pthread.h>
#include <stdlib.h>
#include <sys/syscall.h>
#include <unistd.h>

#include <stdint.h>
#include <string.h>

static void test();

void loop()
{
  while (1) {
    test();
  }
}

long r[45];
void* thr(void* arg)
{
  switch ((long)arg) {
  case 0:
    r[0] = syscall(__NR_mmap, 0x20000000ul, 0xfff000ul, 0x3ul, 0x32ul,
                   0xfffffffffffffffful, 0x0ul);
    break;
  case 1:
    r[1] = syscall(__NR_socket, 0xaul, 0x1ul, 0x8010000000000084ul);
    break;
  case 2:
    *(uint16_t*)0x20186fe4 = (uint16_t)0xa;
    *(uint16_t*)0x20186fe6 = (uint16_t)0x204e;
    *(uint32_t*)0x20186fe8 = (uint32_t)0x0;
    *(uint8_t*)0x20186fec = (uint8_t)0x0;
    *(uint8_t*)0x20186fed = (uint8_t)0x0;
    *(uint8_t*)0x20186fee = (uint8_t)0x0;
    *(uint8_t*)0x20186fef = (uint8_t)0x0;
    *(uint8_t*)0x20186ff0 = (uint8_t)0x0;
    *(uint8_t*)0x20186ff1 = (uint8_t)0x0;
    *(uint8_t*)0x20186ff2 = (uint8_t)0x0;
    *(uint8_t*)0x20186ff3 = (uint8_t)0x0;
    *(uint8_t*)0x20186ff4 = (uint8_t)0x0;
    *(uint8_t*)0x20186ff5 = (uint8_t)0x0;
    *(uint8_t*)0x20186ff6 = (uint8_t)0x0;
    *(uint8_t*)0x20186ff7 = (uint8_t)0x0;
    *(uint8_t*)0x20186ff8 = (uint8_t)0x0;
    *(uint8_t*)0x20186ff9 = (uint8_t)0x0;
    *(uint8_t*)0x20186ffa = (uint8_t)0x0;
    *(uint8_t*)0x20186ffb = (uint8_t)0x0;
    *(uint32_t*)0x20186ffc = (uint32_t)0x0;
    r[22] = syscall(__NR_bind, r[1], 0x20186fe4ul, 0x1cul);
    break;
  case 3:
    r[23] = syscall(__NR_fcntl, r[1], 0x0ul, r[1]);
    break;
  case 4:
    *(uint32_t*)0x20474000 = (uint32_t)0x0;
    *(uint32_t*)0x20474004 = (uint32_t)0x7;
    r[26] = syscall(__NR_setsockopt, r[23], 0x84ul, 0x75ul,
                    0x20474000ul, 0x8ul);
    break;
  case 5:
    memcpy((void*)0x20ff8fff, "\xe1", 1);
    *(uint16_t*)0x2069ffe4 = (uint16_t)0xa;
    *(uint16_t*)0x2069ffe6 = (uint16_t)0x204e;
    *(uint32_t*)0x2069ffe8 = (uint32_t)0x0;
    *(uint64_t*)0x2069ffec = (uint64_t)0x0;
    *(uint64_t*)0x2069fff4 = (uint64_t)0x100000000000000;
    *(uint32_t*)0x2069fffc = (uint32_t)0x0;
    r[34] = syscall(__NR_sendto, r[23], 0x20ff8ffful, 0x1ul, 0x0ul,
                    0x2069ffe4ul, 0x1cul);
    break;
  case 6:
    *(uint32_t*)0x20dafff8 = (uint32_t)0x0;
    *(uint32_t*)0x20dafffc = (uint32_t)0x5;
    r[37] = syscall(__NR_setsockopt, r[23], 0x84ul, 0x76ul,
                    0x20dafff8ul, 0x8ul);
    break;
  case 7:
    *(uint32_t*)0x20b24000 = (uint32_t)0x0;
    *(uint32_t*)0x20b24004 = (uint32_t)0x40080000001;
    r[40] = syscall(__NR_setsockopt, r[23], 0x84ul, 0x77ul,
                    0x20b24000ul, 0x8ul);
    break;
  case 8:
    r[41] = syscall(__NR_ioctl, 0xfffffffffffffffful, 0x4b6bul,
                    0x20000f8cul);
    break;
  case 9:
    r[42] = syscall(__NR_socket, 0x10ul, 0x3ul, 0x0ul);
    break;
  case 10:
    memcpy((void*)0x20493000, "\x26\x00\x00\x00\x13\x00\x47\xf1\x07\x01"
                              "\xc1\xb0\x0e\x00\x00\x00\x00\x00\x00\x00"
                              "\x01\x00\x00\x00\x09\xef\x18\xff\xff\x00"
                              "\xf1\x32\x05\x00\x14\x00\x6e\x35",
           38);
    r[44] = syscall(__NR_write, r[42], 0x20493000ul, 0x26ul);
    break;
  }
  return 0;
}

void test()
{
  long i;
  pthread_t th[22];

  memset(r, -1, sizeof(r));
  for (i = 0; i < 11; i++) {
    pthread_create(&th[i], 0, thr, (void*)i);
    usleep(rand() % 10000);
  }
  usleep(rand() % 100000);
}

int main()
{
  loop();
  return 0;
}