// https://syzkaller.appspot.com/bug?id=3090a3503c287c8738d77d7d8176ddfb67d0c438 // 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define BITMASK(bf_off, bf_len) (((1ull << (bf_len)) - 1) << (bf_off)) #define STORE_BY_BITMASK(type, htobe, addr, val, bf_off, bf_len) \ *(type*)(addr) = \ htobe((htobe(*(type*)(addr)) & ~BITMASK((bf_off), (bf_len))) | \ (((type)(val) << (bf_off)) & BITMASK((bf_off), (bf_len)))) struct csum_inet { uint32_t acc; }; static void csum_inet_init(struct csum_inet* csum) { csum->acc = 0; } static void csum_inet_update(struct csum_inet* csum, const uint8_t* data, size_t length) { if (length == 0) return; size_t i; for (i = 0; i < length - 1; i += 2) csum->acc += *(uint16_t*)&data[i]; if (length & 1) csum->acc += (uint16_t)data[length - 1]; while (csum->acc > 0xffff) csum->acc = (csum->acc & 0xffff) + (csum->acc >> 16); } static uint16_t csum_inet_digest(struct csum_inet* csum) { return ~csum->acc; } 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; } struct nlmsg { char* pos; int nesting; struct nlattr* nested[8]; char buf[1024]; }; static struct nlmsg nlmsg; 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; 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) { 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; unsigned n = sendto(sock, nlmsg->buf, hdr->nlmsg_len, 0, (struct sockaddr*)&addr, sizeof(addr)); if (n != hdr->nlmsg_len) exit(1); n = recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0); if (hdr->nlmsg_type == NLMSG_DONE) { *reply_len = 0; return 0; } if (n < sizeof(struct nlmsghdr)) exit(1); if (reply_len && hdr->nlmsg_type == reply_type) { *reply_len = n; return 0; } if (n < sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr)) exit(1); if (hdr->nlmsg_type != NLMSG_ERROR) exit(1); return -((struct nlmsgerr*)(hdr + 1))->error; } static int netlink_send(struct nlmsg* nlmsg, int sock) { return netlink_send_ext(nlmsg, sock, 0, NULL); } static void netlink_device_change(struct nlmsg* nlmsg, int sock, const char* name, bool up, const char* master, const void* mac, int macsize, const char* new_name) { struct ifinfomsg hdr; memset(&hdr, 0, sizeof(hdr)); if (up) hdr.ifi_flags = hdr.ifi_change = IFF_UP; hdr.ifi_index = if_nametoindex(name); netlink_init(nlmsg, RTM_NEWLINK, 0, &hdr, sizeof(hdr)); if (new_name) netlink_attr(nlmsg, IFLA_IFNAME, new_name, strlen(new_name)); if (master) { int ifindex = if_nametoindex(master); netlink_attr(nlmsg, IFLA_MASTER, &ifindex, sizeof(ifindex)); } if (macsize) netlink_attr(nlmsg, IFLA_ADDRESS, mac, macsize); int err = netlink_send(nlmsg, sock); (void)err; } static int netlink_add_addr(struct nlmsg* nlmsg, int sock, const char* dev, const void* addr, int addrsize) { struct ifaddrmsg hdr; memset(&hdr, 0, sizeof(hdr)); hdr.ifa_family = addrsize == 4 ? AF_INET : AF_INET6; hdr.ifa_prefixlen = addrsize == 4 ? 24 : 120; hdr.ifa_scope = RT_SCOPE_UNIVERSE; hdr.ifa_index = if_nametoindex(dev); netlink_init(nlmsg, RTM_NEWADDR, NLM_F_CREATE | NLM_F_REPLACE, &hdr, sizeof(hdr)); netlink_attr(nlmsg, IFA_LOCAL, addr, addrsize); netlink_attr(nlmsg, IFA_ADDRESS, addr, addrsize); return netlink_send(nlmsg, sock); } static void netlink_add_addr4(struct nlmsg* nlmsg, int sock, const char* dev, const char* addr) { struct in_addr in_addr; inet_pton(AF_INET, addr, &in_addr); int err = netlink_add_addr(nlmsg, sock, dev, &in_addr, sizeof(in_addr)); (void)err; } static void netlink_add_addr6(struct nlmsg* nlmsg, int sock, const char* dev, const char* addr) { struct in6_addr in6_addr; inet_pton(AF_INET6, addr, &in6_addr); int err = netlink_add_addr(nlmsg, sock, dev, &in6_addr, sizeof(in6_addr)); (void)err; } static void netlink_add_neigh(struct nlmsg* nlmsg, int sock, const char* name, const void* addr, int addrsize, const void* mac, int macsize) { struct ndmsg hdr; memset(&hdr, 0, sizeof(hdr)); hdr.ndm_family = addrsize == 4 ? AF_INET : AF_INET6; hdr.ndm_ifindex = if_nametoindex(name); hdr.ndm_state = NUD_PERMANENT; netlink_init(nlmsg, RTM_NEWNEIGH, NLM_F_EXCL | NLM_F_CREATE, &hdr, sizeof(hdr)); netlink_attr(nlmsg, NDA_DST, addr, addrsize); netlink_attr(nlmsg, NDA_LLADDR, mac, macsize); int err = netlink_send(nlmsg, sock); (void)err; } static int tunfd = -1; static int tun_frags_enabled; #define TUN_IFACE "syz_tun" #define LOCAL_MAC 0xaaaaaaaaaaaa #define REMOTE_MAC 0xaaaaaaaaaabb #define LOCAL_IPV4 "172.20.20.170" #define REMOTE_IPV4 "172.20.20.187" #define LOCAL_IPV6 "fe80::aa" #define REMOTE_IPV6 "fe80::bb" #define IFF_NAPI 0x0010 #define IFF_NAPI_FRAGS 0x0020 static void initialize_tun(void) { tunfd = open("/dev/net/tun", O_RDWR | O_NONBLOCK); if (tunfd == -1) { printf("tun: can't open /dev/net/tun: please enable CONFIG_TUN=y\n"); printf("otherwise fuzzing or reproducing might not work as intended\n"); return; } const int kTunFd = 240; if (dup2(tunfd, kTunFd) < 0) exit(1); close(tunfd); tunfd = kTunFd; struct ifreq ifr; memset(&ifr, 0, sizeof(ifr)); strncpy(ifr.ifr_name, TUN_IFACE, IFNAMSIZ); ifr.ifr_flags = IFF_TAP | IFF_NO_PI | IFF_NAPI | IFF_NAPI_FRAGS; if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0) { ifr.ifr_flags = IFF_TAP | IFF_NO_PI; if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0) exit(1); } if (ioctl(tunfd, TUNGETIFF, (void*)&ifr) < 0) exit(1); tun_frags_enabled = (ifr.ifr_flags & IFF_NAPI_FRAGS) != 0; char sysctl[64]; sprintf(sysctl, "/proc/sys/net/ipv6/conf/%s/accept_dad", TUN_IFACE); write_file(sysctl, "0"); sprintf(sysctl, "/proc/sys/net/ipv6/conf/%s/router_solicitations", TUN_IFACE); write_file(sysctl, "0"); int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); if (sock == -1) exit(1); netlink_add_addr4(&nlmsg, sock, TUN_IFACE, LOCAL_IPV4); netlink_add_addr6(&nlmsg, sock, TUN_IFACE, LOCAL_IPV6); uint64_t macaddr = REMOTE_MAC; struct in_addr in_addr; inet_pton(AF_INET, REMOTE_IPV4, &in_addr); netlink_add_neigh(&nlmsg, sock, TUN_IFACE, &in_addr, sizeof(in_addr), &macaddr, ETH_ALEN); struct in6_addr in6_addr; inet_pton(AF_INET6, REMOTE_IPV6, &in6_addr); netlink_add_neigh(&nlmsg, sock, TUN_IFACE, &in6_addr, sizeof(in6_addr), &macaddr, ETH_ALEN); macaddr = LOCAL_MAC; netlink_device_change(&nlmsg, sock, TUN_IFACE, true, 0, &macaddr, ETH_ALEN, NULL); close(sock); } #define MAX_FRAGS 4 struct vnet_fragmentation { uint32_t full; uint32_t count; uint32_t frags[MAX_FRAGS]; }; static long syz_emit_ethernet(volatile long a0, volatile long a1, volatile long a2) { if (tunfd < 0) return (uintptr_t)-1; uint32_t length = a0; char* data = (char*)a1; struct vnet_fragmentation* frags = (struct vnet_fragmentation*)a2; struct iovec vecs[MAX_FRAGS + 1]; uint32_t nfrags = 0; if (!tun_frags_enabled || frags == NULL) { vecs[nfrags].iov_base = data; vecs[nfrags].iov_len = length; nfrags++; } else { bool full = true; uint32_t i, count = 0; full = frags->full; count = frags->count; if (count > MAX_FRAGS) count = MAX_FRAGS; for (i = 0; i < count && length != 0; i++) { uint32_t size = 0; size = frags->frags[i]; if (size > length) size = length; vecs[nfrags].iov_base = data; vecs[nfrags].iov_len = size; nfrags++; data += size; length -= size; } if (length != 0 && (full || nfrags == 0)) { vecs[nfrags].iov_base = data; vecs[nfrags].iov_len = length; nfrags++; } } return writev(tunfd, vecs, nfrags); } static void setup_common() { if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) { } } static void loop(); static void sandbox_common() { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); setpgrp(); setsid(); struct rlimit rlim; rlim.rlim_cur = rlim.rlim_max = (200 << 20); setrlimit(RLIMIT_AS, &rlim); rlim.rlim_cur = rlim.rlim_max = 32 << 20; setrlimit(RLIMIT_MEMLOCK, &rlim); rlim.rlim_cur = rlim.rlim_max = 136 << 20; setrlimit(RLIMIT_FSIZE, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_STACK, &rlim); rlim.rlim_cur = rlim.rlim_max = 0; setrlimit(RLIMIT_CORE, &rlim); rlim.rlim_cur = rlim.rlim_max = 256; setrlimit(RLIMIT_NOFILE, &rlim); if (unshare(CLONE_NEWNS)) { } if (unshare(CLONE_NEWIPC)) { } if (unshare(0x02000000)) { } if (unshare(CLONE_NEWUTS)) { } if (unshare(CLONE_SYSVSEM)) { } typedef struct { const char* name; const char* value; } sysctl_t; static const sysctl_t sysctls[] = { {"/proc/sys/kernel/shmmax", "16777216"}, {"/proc/sys/kernel/shmall", "536870912"}, {"/proc/sys/kernel/shmmni", "1024"}, {"/proc/sys/kernel/msgmax", "8192"}, {"/proc/sys/kernel/msgmni", "1024"}, {"/proc/sys/kernel/msgmnb", "1024"}, {"/proc/sys/kernel/sem", "1024 1048576 500 1024"}, }; unsigned i; for (i = 0; i < sizeof(sysctls) / sizeof(sysctls[0]); i++) write_file(sysctls[i].name, sysctls[i].value); } int wait_for_loop(int pid) { if (pid < 0) exit(1); int status = 0; while (waitpid(-1, &status, __WALL) != pid) { } return WEXITSTATUS(status); } static void drop_caps(void) { struct __user_cap_header_struct cap_hdr = {}; struct __user_cap_data_struct cap_data[2] = {}; cap_hdr.version = _LINUX_CAPABILITY_VERSION_3; cap_hdr.pid = getpid(); if (syscall(SYS_capget, &cap_hdr, &cap_data)) exit(1); const int drop = (1 << CAP_SYS_PTRACE) | (1 << CAP_SYS_NICE); cap_data[0].effective &= ~drop; cap_data[0].permitted &= ~drop; cap_data[0].inheritable &= ~drop; if (syscall(SYS_capset, &cap_hdr, &cap_data)) exit(1); } static int do_sandbox_none(void) { if (unshare(CLONE_NEWPID)) { } int pid = fork(); if (pid != 0) return wait_for_loop(pid); setup_common(); sandbox_common(); drop_caps(); if (unshare(CLONE_NEWNET)) { } initialize_tun(); loop(); exit(1); } #ifndef __NR_bpf #define __NR_bpf 321 #endif uint64_t r[3] = {0xffffffffffffffff, 0xffffffffffffffff, 0x0}; void loop(void) { intptr_t res = 0; res = syscall(__NR_socket, 0x10ul, 3ul, 0ul); if (res != -1) r[0] = res; syscall(__NR_socket, 0x10ul, 0x80002ul, 0); syscall(__NR_socket, 0x200000000000011ul, 3ul, 0); syscall(__NR_socket, 0x10ul, 3ul, 0x10ul); *(uint32_t*)0x200004c0 = 1; *(uint32_t*)0x200004c4 = 5; *(uint32_t*)0x200004c8 = 0x899; *(uint32_t*)0x200004cc = 2; *(uint32_t*)0x200004d0 = 0; *(uint32_t*)0x200004d4 = -1; *(uint32_t*)0x200004d8 = 0; *(uint8_t*)0x200004dc = 0; *(uint8_t*)0x200004dd = 0; *(uint8_t*)0x200004de = 0; *(uint8_t*)0x200004df = 0; *(uint8_t*)0x200004e0 = 0; *(uint8_t*)0x200004e1 = 4; *(uint8_t*)0x200004e2 = 0; *(uint8_t*)0x200004e3 = 0; *(uint8_t*)0x200004e4 = 0; *(uint8_t*)0x200004e5 = 0; *(uint8_t*)0x200004e6 = 0; *(uint8_t*)0x200004e7 = 0; *(uint8_t*)0x200004e8 = 0; *(uint8_t*)0x200004e9 = 0; *(uint8_t*)0x200004ea = 0; *(uint8_t*)0x200004eb = 0; *(uint32_t*)0x200004ec = 0; *(uint32_t*)0x200004f0 = -1; *(uint32_t*)0x200004f4 = 0; *(uint32_t*)0x200004f8 = 0; syscall(__NR_bpf, 0ul, 0x200004c0ul, 0x3cul); *(uint32_t*)0x20000180 = 6; *(uint32_t*)0x20000184 = 4; *(uint64_t*)0x20000188 = 0x20000200; *(uint8_t*)0x20000200 = 0x18; STORE_BY_BITMASK(uint8_t, , 0x20000201, 2, 0, 4); STORE_BY_BITMASK(uint8_t, , 0x20000201, 0, 4, 4); *(uint16_t*)0x20000202 = 0; *(uint32_t*)0x20000204 = 0; *(uint8_t*)0x20000208 = 0; *(uint8_t*)0x20000209 = 0; *(uint16_t*)0x2000020a = 0; *(uint32_t*)0x2000020c = 0; *(uint8_t*)0x20000210 = 0x85; *(uint8_t*)0x20000211 = 0; *(uint16_t*)0x20000212 = 0; *(uint32_t*)0x20000214 = 0x2c; *(uint8_t*)0x20000218 = 0x95; *(uint8_t*)0x20000219 = 0; *(uint16_t*)0x2000021a = 0; *(uint32_t*)0x2000021c = 0; *(uint64_t*)0x20000190 = 0x200000c0; memcpy((void*)0x200000c0, "GPL\000", 4); *(uint32_t*)0x20000198 = 4; *(uint32_t*)0x2000019c = 0x1000; *(uint64_t*)0x200001a0 = 0x2062b000; *(uint32_t*)0x200001a8 = 0; *(uint32_t*)0x200001ac = 0; *(uint8_t*)0x200001b0 = 0; *(uint8_t*)0x200001b1 = 0; *(uint8_t*)0x200001b2 = 0; *(uint8_t*)0x200001b3 = 0; *(uint8_t*)0x200001b4 = 0; *(uint8_t*)0x200001b5 = 0; *(uint8_t*)0x200001b6 = 0; *(uint8_t*)0x200001b7 = 0; *(uint8_t*)0x200001b8 = 0; *(uint8_t*)0x200001b9 = 0; *(uint8_t*)0x200001ba = 0; *(uint8_t*)0x200001bb = 0; *(uint8_t*)0x200001bc = 0; *(uint8_t*)0x200001bd = 0; *(uint8_t*)0x200001be = 0; *(uint8_t*)0x200001bf = 0; *(uint32_t*)0x200001c0 = 0; *(uint32_t*)0x200001c4 = 0; *(uint32_t*)0x200001c8 = -1; *(uint32_t*)0x200001cc = 8; *(uint64_t*)0x200001d0 = 0; *(uint32_t*)0x200001d8 = 0; *(uint32_t*)0x200001dc = 0x10; *(uint64_t*)0x200001e0 = 0; *(uint32_t*)0x200001e8 = 0; *(uint32_t*)0x200001ec = 0; *(uint32_t*)0x200001f0 = -1; res = syscall(__NR_bpf, 5ul, 0x20000180ul, 0x70ul); if (res != -1) r[1] = res; *(uint32_t*)0x200004c0 = r[1]; *(uint32_t*)0x200004c4 = 0xc0; *(uint64_t*)0x200004c8 = 0x20000400; *(uint64_t*)0x20000470 = 0; *(uint64_t*)0x20000488 = 0; *(uint64_t*)0x20000498 = 0; *(uint64_t*)0x200004a0 = 0; *(uint64_t*)0x200004b8 = 0; res = syscall(__NR_bpf, 0xful, 0x200004c0ul, 0x10ul); if (res != -1) r[2] = *(uint32_t*)0x20000404; *(uint32_t*)0x20000240 = r[2]; *(uint32_t*)0x20000244 = 0; *(uint32_t*)0x20000248 = 0; syscall(__NR_bpf, 0xdul, 0x20000240ul, 0xcul); *(uint32_t*)0x20002040 = r[2]; *(uint32_t*)0x20002044 = 0; *(uint32_t*)0x20002048 = 0; syscall(__NR_bpf, 0xdul, 0x20002040ul, 0xcul); *(uint64_t*)0x20000140 = 0; *(uint32_t*)0x20000148 = 0; *(uint64_t*)0x20000150 = 0x20000080; *(uint64_t*)0x20000080 = 0x20000640; *(uint32_t*)0x20000640 = 0xa8; *(uint16_t*)0x20000644 = 0x10; *(uint16_t*)0x20000646 = 0x801; *(uint32_t*)0x20000648 = 0; *(uint32_t*)0x2000064c = 0; *(uint8_t*)0x20000650 = 0; *(uint8_t*)0x20000651 = 0; *(uint16_t*)0x20000652 = 0; *(uint32_t*)0x20000654 = 0; *(uint32_t*)0x20000658 = 0; *(uint32_t*)0x2000065c = 0; *(uint16_t*)0x20000660 = 0x80; *(uint16_t*)0x20000662 = 0x2b; *(uint16_t*)0x20000664 = 0x7c; *(uint16_t*)0x20000666 = 1; *(uint32_t*)0x20000668 = 0xa; *(uint32_t*)0x2000066c = 0; *(uint64_t*)0x20000670 = 0; *(uint64_t*)0x20000678 = 0; *(uint32_t*)0x20000680 = 0; *(uint32_t*)0x20000684 = 0; *(uint64_t*)0x20000688 = 0; *(uint32_t*)0x20000690 = 0; *(uint32_t*)0x20000694 = 0; *(uint8_t*)0x20000698 = 0; *(uint8_t*)0x20000699 = 0; *(uint8_t*)0x2000069a = 0; *(uint8_t*)0x2000069b = 0; *(uint8_t*)0x2000069c = 0; *(uint8_t*)0x2000069d = 0; *(uint8_t*)0x2000069e = 0; *(uint8_t*)0x2000069f = 0; *(uint8_t*)0x200006a0 = 0; *(uint8_t*)0x200006a1 = 0; *(uint8_t*)0x200006a2 = 0; *(uint8_t*)0x200006a3 = 0; *(uint8_t*)0x200006a4 = 0; *(uint8_t*)0x200006a5 = 0; *(uint8_t*)0x200006a6 = 0; *(uint8_t*)0x200006a7 = 0; *(uint32_t*)0x200006a8 = 0; *(uint32_t*)0x200006ac = 0; *(uint32_t*)0x200006b0 = -1; *(uint32_t*)0x200006b4 = 8; *(uint64_t*)0x200006b8 = 0; *(uint32_t*)0x200006c0 = 0; *(uint32_t*)0x200006c4 = 0x10; *(uint64_t*)0x200006c8 = 0; *(uint32_t*)0x200006d0 = 0; *(uint32_t*)0x200006d4 = 0; *(uint32_t*)0x200006d8 = -1; *(uint16_t*)0x200006e0 = 8; *(uint16_t*)0x200006e2 = 0x1b; *(uint32_t*)0x200006e4 = 0; *(uint64_t*)0x20000088 = 0xa8; *(uint64_t*)0x20000158 = 1; *(uint64_t*)0x20000160 = 0; *(uint64_t*)0x20000168 = 0; *(uint32_t*)0x20000170 = 0; syscall(__NR_sendmsg, r[0], 0x20000140ul, 0ul); *(uint8_t*)0x20000100 = -1; *(uint8_t*)0x20000101 = -1; *(uint8_t*)0x20000102 = -1; *(uint8_t*)0x20000103 = -1; *(uint8_t*)0x20000104 = -1; *(uint8_t*)0x20000105 = -1; memcpy((void*)0x20000106, "\x96\xc1\xe9\x57\x4b\x31", 6); *(uint16_t*)0x2000010c = htobe16(0x800); STORE_BY_BITMASK(uint8_t, , 0x2000010e, 0xa, 0, 4); STORE_BY_BITMASK(uint8_t, , 0x2000010e, 4, 4, 4); STORE_BY_BITMASK(uint8_t, , 0x2000010f, 0, 0, 2); STORE_BY_BITMASK(uint8_t, , 0x2000010f, 0x27, 2, 6); *(uint16_t*)0x20000110 = htobe16(0x30); *(uint16_t*)0x20000112 = htobe16(0x67); *(uint16_t*)0x20000114 = htobe16(0); *(uint8_t*)0x20000116 = 0xfa; *(uint8_t*)0x20000117 = 2; *(uint16_t*)0x20000118 = htobe16(0); *(uint32_t*)0x2000011a = htobe32(0); *(uint32_t*)0x2000011e = htobe32(0); *(uint8_t*)0x20000122 = 0x89; *(uint8_t*)0x20000123 = 0x13; *(uint8_t*)0x20000124 = 0x3d; *(uint32_t*)0x20000125 = htobe32(3); *(uint8_t*)0x20000129 = 0xac; *(uint8_t*)0x2000012a = 0x14; *(uint8_t*)0x2000012b = 0x14; *(uint8_t*)0x2000012c = 0x2b; *(uint8_t*)0x2000012d = 0xac; *(uint8_t*)0x2000012e = 0x14; *(uint8_t*)0x2000012f = 0x14; *(uint8_t*)0x20000130 = 0xbb; *(uint32_t*)0x20000131 = htobe32(0xe0000001); *(uint8_t*)0x20000136 = 1; *(uint8_t*)0x20000137 = 9; *(uint16_t*)0x20000138 = htobe16(0); *(uint32_t*)0x2000013a = htobe32(0x80); struct csum_inet csum_1; csum_inet_init(&csum_1); csum_inet_update(&csum_1, (const uint8_t*)0x20000136, 8); *(uint16_t*)0x20000138 = csum_inet_digest(&csum_1); struct csum_inet csum_2; csum_inet_init(&csum_2); csum_inet_update(&csum_2, (const uint8_t*)0x2000010e, 40); *(uint16_t*)0x20000118 = csum_inet_digest(&csum_2); syz_emit_ethernet(0x3e, 0x20000100, 0); } int main(void) { syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 3ul, 0x32ul, -1, 0); do_sandbox_none(); return 0; }