// https://syzkaller.appspot.com/bug?id=eb130d0dce27d47a9b3ef4802f423214ddd587ac // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include struct nlmsg { char* pos; int nesting; struct nlattr* nested[8]; char buf[4096]; }; static void netlink_init(struct nlmsg* nlmsg, int typ, int flags, const void* data, int size) { memset(nlmsg, 0, sizeof(*nlmsg)); struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf; hdr->nlmsg_type = typ; hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags; memcpy(hdr + 1, data, size); nlmsg->pos = (char*)(hdr + 1) + NLMSG_ALIGN(size); } static void netlink_attr(struct nlmsg* nlmsg, int typ, const void* data, int size) { struct nlattr* attr = (struct nlattr*)nlmsg->pos; attr->nla_len = sizeof(*attr) + size; attr->nla_type = typ; if (size > 0) memcpy(attr + 1, data, size); nlmsg->pos += NLMSG_ALIGN(attr->nla_len); } static int netlink_send_ext(struct nlmsg* nlmsg, int sock, uint16_t reply_type, int* reply_len, bool dofail) { if (nlmsg->pos > nlmsg->buf + sizeof(nlmsg->buf) || nlmsg->nesting) exit(1); struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf; hdr->nlmsg_len = nlmsg->pos - nlmsg->buf; struct sockaddr_nl addr; memset(&addr, 0, sizeof(addr)); addr.nl_family = AF_NETLINK; ssize_t n = sendto(sock, nlmsg->buf, hdr->nlmsg_len, 0, (struct sockaddr*)&addr, sizeof(addr)); if (n != (ssize_t)hdr->nlmsg_len) { if (dofail) exit(1); return -1; } n = recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0); if (reply_len) *reply_len = 0; if (n < 0) { if (dofail) exit(1); return -1; } if (n < (ssize_t)sizeof(struct nlmsghdr)) { errno = EINVAL; if (dofail) exit(1); return -1; } if (hdr->nlmsg_type == NLMSG_DONE) return 0; if (reply_len && hdr->nlmsg_type == reply_type) { *reply_len = n; return 0; } if (n < (ssize_t)(sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr))) { errno = EINVAL; if (dofail) exit(1); return -1; } if (hdr->nlmsg_type != NLMSG_ERROR) { errno = EINVAL; if (dofail) exit(1); return -1; } errno = -((struct nlmsgerr*)(hdr + 1))->error; return -errno; } static int netlink_query_family_id(struct nlmsg* nlmsg, int sock, const char* family_name, bool dofail) { struct genlmsghdr genlhdr; memset(&genlhdr, 0, sizeof(genlhdr)); genlhdr.cmd = CTRL_CMD_GETFAMILY; netlink_init(nlmsg, GENL_ID_CTRL, 0, &genlhdr, sizeof(genlhdr)); netlink_attr(nlmsg, CTRL_ATTR_FAMILY_NAME, family_name, strnlen(family_name, GENL_NAMSIZ - 1) + 1); int n = 0; int err = netlink_send_ext(nlmsg, sock, GENL_ID_CTRL, &n, dofail); if (err < 0) { return -1; } uint16_t id = 0; struct nlattr* attr = (struct nlattr*)(nlmsg->buf + NLMSG_HDRLEN + NLMSG_ALIGN(sizeof(genlhdr))); for (; (char*)attr < nlmsg->buf + n; attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) { if (attr->nla_type == CTRL_ATTR_FAMILY_ID) { id = *(uint16_t*)(attr + 1); break; } } if (!id) { errno = EINVAL; return -1; } recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0); return id; } const int kInitNetNsFd = 239; static long syz_init_net_socket(volatile long domain, volatile long type, volatile long proto) { return syscall(__NR_socket, domain, type, proto); } static long syz_genetlink_get_family_id(volatile long name, volatile long sock_arg) { bool dofail = false; int fd = sock_arg; if (fd < 0) { dofail = true; fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC); if (fd == -1) { return -1; } } struct nlmsg nlmsg_tmp; int ret = netlink_query_family_id(&nlmsg_tmp, fd, (char*)name, dofail); if ((int)sock_arg < 0) close(fd); if (ret < 0) { return -1; } return ret; } uint64_t r[3] = {0xffffffffffffffff, 0x0, 0xffffffffffffffff}; int main(void) { syscall(__NR_mmap, 0x1ffff000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul); syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x32ul, -1, 0ul); syscall(__NR_mmap, 0x21000000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul); intptr_t res = 0; res = -1; res = syz_init_net_socket(0x10, 3, 0x10); if (res != -1) r[0] = res; memcpy((void*)0x20000300, "802.15.4 MAC\000", 13); res = -1; res = syz_genetlink_get_family_id(0x20000300, r[0]); if (res != -1) r[1] = res; res = -1; res = syz_init_net_socket(0x10, 3, 0x10); if (res != -1) r[2] = res; *(uint64_t*)0x20000440 = 0; *(uint32_t*)0x20000448 = 0; *(uint64_t*)0x20000450 = 0x20000340; *(uint64_t*)0x20000340 = 0x20000280; *(uint32_t*)0x20000280 = 0x3c; *(uint16_t*)0x20000284 = r[1]; *(uint16_t*)0x20000286 = 0x421; *(uint32_t*)0x20000288 = 0; *(uint32_t*)0x2000028c = 0; *(uint8_t*)0x20000290 = 0x28; *(uint8_t*)0x20000291 = 0; *(uint16_t*)0x20000292 = 0; *(uint16_t*)0x20000294 = 0xc; *(uint16_t*)0x20000296 = 0x2d; *(uint64_t*)0x20000298 = 0x2f9ac7a5e1c5f34e; *(uint16_t*)0x200002a0 = 6; *(uint16_t*)0x200002a2 = 4; *(uint16_t*)0x200002a4 = -1; *(uint16_t*)0x200002a8 = 5; *(uint16_t*)0x200002aa = 0x2b; *(uint8_t*)0x200002ac = 0; *(uint16_t*)0x200002b0 = 0xa; *(uint16_t*)0x200002b2 = 1; memcpy((void*)0x200002b4, "wpan1\000", 6); *(uint64_t*)0x20000348 = 0x3c; *(uint64_t*)0x20000458 = 1; *(uint64_t*)0x20000460 = 0; *(uint64_t*)0x20000468 = 0; *(uint32_t*)0x20000470 = 0xc0001; syscall(__NR_sendmsg, r[2], 0x20000440ul, 0x4054ul); return 0; }