syzkaller-repros/linux/c1bc9515d815388b96876f42105845ed6bc6b2fe.c

// KMSAN: uninit-value in __inet6_bind
// https://syzkaller.appspot.com/bug?id=c1bc9515d815388b96876f42105845ed6bc6b2fe
// status:fixed
// autogenerated by syzkaller (https://github.com/google/syzkaller)

#define _GNU_SOURCE

#include <endian.h>
#include <errno.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <sys/syscall.h>
#include <sys/types.h>
#include <unistd.h>

#include <linux/genetlink.h>
#include <linux/netlink.h>

static long syz_genetlink_get_family_id(long name)
{
  char buf[512] = {0};
  struct nlmsghdr* hdr = (struct nlmsghdr*)buf;
  struct genlmsghdr* genlhdr = (struct genlmsghdr*)NLMSG_DATA(hdr);
  struct nlattr* attr = (struct nlattr*)(genlhdr + 1);
  hdr->nlmsg_len =
      sizeof(*hdr) + sizeof(*genlhdr) + sizeof(*attr) + GENL_NAMSIZ;
  hdr->nlmsg_type = GENL_ID_CTRL;
  hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
  genlhdr->cmd = CTRL_CMD_GETFAMILY;
  attr->nla_type = CTRL_ATTR_FAMILY_NAME;
  attr->nla_len = sizeof(*attr) + GENL_NAMSIZ;
  strncpy((char*)(attr + 1), (char*)name, GENL_NAMSIZ);
  struct iovec iov = {hdr, hdr->nlmsg_len};
  struct sockaddr_nl addr = {0};
  addr.nl_family = AF_NETLINK;
  int fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC);
  if (fd == -1) {
    return -1;
  }
  struct msghdr msg = {&addr, sizeof(addr), &iov, 1, NULL, 0, 0};
  if (sendmsg(fd, &msg, 0) == -1) {
    close(fd);
    return -1;
  }
  ssize_t n = recv(fd, buf, sizeof(buf), 0);
  close(fd);
  if (n <= 0) {
    return -1;
  }
  if (hdr->nlmsg_type != GENL_ID_CTRL) {
    return -1;
  }
  for (; (char*)attr < buf + n;
       attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) {
    if (attr->nla_type == CTRL_ATTR_FAMILY_ID)
      return *(uint16_t*)(attr + 1);
  }
  return -1;
}

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

int main(void)
{
  syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0);
  long res = 0;
  res = syscall(__NR_socket, 0x10, 3, 0x10);
  if (res != -1)
    r[0] = res;
  memcpy((void*)0x20000600, "TIPCv2\x00", 7);
  res = syz_genetlink_get_family_id(0x20000600);
  if (res != -1)
    r[1] = res;
  *(uint64_t*)0x200008c0 = 0;
  *(uint32_t*)0x200008c8 = 0;
  *(uint64_t*)0x200008d0 = 0x20000880;
  *(uint64_t*)0x20000880 = 0x20000640;
  *(uint32_t*)0x20000640 = 0x6c;
  *(uint16_t*)0x20000644 = r[1];
  *(uint16_t*)0x20000646 = 0x201;
  *(uint32_t*)0x20000648 = 0;
  *(uint32_t*)0x2000064c = 0;
  *(uint8_t*)0x20000650 = 3;
  *(uint8_t*)0x20000651 = 0;
  *(uint16_t*)0x20000652 = 0;
  *(uint16_t*)0x20000654 = 0x58;
  *(uint16_t*)0x20000656 = 1;
  *(uint16_t*)0x20000658 = 0x10;
  *(uint16_t*)0x2000065a = 1;
  memcpy((void*)0x2000065c, "udp:syz2\x00", 9);
  *(uint16_t*)0x20000668 = 0x44;
  *(uint16_t*)0x2000066a = 4;
  *(uint16_t*)0x2000066c = 0x20;
  *(uint16_t*)0x2000066e = 1;
  *(uint16_t*)0x20000670 = 0xa;
  *(uint16_t*)0x20000672 = htobe16(0);
  *(uint32_t*)0x20000674 = 0;
  *(uint8_t*)0x20000678 = 0xfe;
  *(uint8_t*)0x20000679 = 0x80;
  *(uint8_t*)0x2000067a = 0;
  *(uint8_t*)0x2000067b = 0;
  *(uint8_t*)0x2000067c = 0;
  *(uint8_t*)0x2000067d = 0;
  *(uint8_t*)0x2000067e = 0;
  *(uint8_t*)0x2000067f = 0;
  *(uint8_t*)0x20000680 = 0;
  *(uint8_t*)0x20000681 = 0;
  *(uint8_t*)0x20000682 = 0;
  *(uint8_t*)0x20000683 = 0;
  *(uint8_t*)0x20000684 = 0;
  *(uint8_t*)0x20000685 = 0;
  *(uint8_t*)0x20000686 = 0;
  *(uint8_t*)0x20000687 = 0xbb;
  *(uint32_t*)0x20000688 = 0x1ff;
  *(uint16_t*)0x2000068c = 0x20;
  *(uint16_t*)0x2000068e = 2;
  *(uint16_t*)0x20000690 = 2;
  *(uint16_t*)0x20000692 = htobe16(0);
  *(uint32_t*)0x20000694 = 0;
  *(uint64_t*)0x20000698 = htobe64(0);
  *(uint64_t*)0x200006a0 = htobe64(1);
  *(uint32_t*)0x200006a8 = 0;
  *(uint64_t*)0x20000888 = 0x6c;
  *(uint64_t*)0x200008d8 = 1;
  *(uint64_t*)0x200008e0 = 0;
  *(uint64_t*)0x200008e8 = 0;
  *(uint32_t*)0x200008f0 = 0;
  syscall(__NR_sendmsg, r[0], 0x200008c0, 0);
  return 0;
}