| // KASAN: use-after-free Read in napi_gro_frags |
| // https://syzkaller.appspot.com/bug?id=7b571739e71a77303e665c793d1f773ce3823226 |
| // status:fixed |
| // autogenerated by syzkaller (https://github.com/google/syzkaller) |
| |
| #define _GNU_SOURCE |
| |
| #include <arpa/inet.h> |
| #include <dirent.h> |
| #include <endian.h> |
| #include <errno.h> |
| #include <fcntl.h> |
| #include <net/if.h> |
| #include <net/if_arp.h> |
| #include <netinet/in.h> |
| #include <sched.h> |
| #include <signal.h> |
| #include <stdarg.h> |
| #include <stdbool.h> |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/ioctl.h> |
| #include <sys/mount.h> |
| #include <sys/prctl.h> |
| #include <sys/resource.h> |
| #include <sys/socket.h> |
| #include <sys/stat.h> |
| #include <sys/syscall.h> |
| #include <sys/time.h> |
| #include <sys/types.h> |
| #include <sys/uio.h> |
| #include <sys/wait.h> |
| #include <time.h> |
| #include <unistd.h> |
| |
| #include <linux/if_addr.h> |
| #include <linux/if_ether.h> |
| #include <linux/if_link.h> |
| #include <linux/if_tun.h> |
| #include <linux/in6.h> |
| #include <linux/ip.h> |
| #include <linux/neighbour.h> |
| #include <linux/net.h> |
| #include <linux/netlink.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/tcp.h> |
| #include <linux/veth.h> |
| |
| unsigned long long procid; |
| |
| static void sleep_ms(uint64_t ms) |
| { |
| usleep(ms * 1000); |
| } |
| |
| static uint64_t current_time_ms(void) |
| { |
| struct timespec ts; |
| if (clock_gettime(CLOCK_MONOTONIC, &ts)) |
| exit(1); |
| return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; |
| } |
| |
| #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; |
| } |
| |
| static struct { |
| char* pos; |
| int nesting; |
| struct nlattr* nested[8]; |
| char buf[1024]; |
| } nlmsg; |
| |
| static void netlink_init(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(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 void netlink_nest(int typ) |
| { |
| struct nlattr* attr = (struct nlattr*)nlmsg.pos; |
| attr->nla_type = typ; |
| nlmsg.pos += sizeof(*attr); |
| nlmsg.nested[nlmsg.nesting++] = attr; |
| } |
| |
| static void netlink_done(void) |
| { |
| struct nlattr* attr = nlmsg.nested[--nlmsg.nesting]; |
| attr->nla_len = nlmsg.pos - (char*)attr; |
| } |
| |
| static int netlink_send(int sock) |
| { |
| 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 (n < sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr)) |
| exit(1); |
| if (hdr->nlmsg_type != NLMSG_ERROR) |
| exit(1); |
| return -((struct nlmsgerr*)(hdr + 1))->error; |
| } |
| |
| static void netlink_add_device_impl(const char* type, const char* name) |
| { |
| struct ifinfomsg hdr; |
| memset(&hdr, 0, sizeof(hdr)); |
| netlink_init(RTM_NEWLINK, NLM_F_EXCL | NLM_F_CREATE, &hdr, sizeof(hdr)); |
| if (name) |
| netlink_attr(IFLA_IFNAME, name, strlen(name)); |
| netlink_nest(IFLA_LINKINFO); |
| netlink_attr(IFLA_INFO_KIND, type, strlen(type)); |
| } |
| |
| static void netlink_add_device(int sock, const char* type, const char* name) |
| { |
| netlink_add_device_impl(type, name); |
| netlink_done(); |
| int err = netlink_send(sock); |
| (void)err; |
| } |
| |
| static void netlink_add_veth(int sock, const char* name, const char* peer) |
| { |
| netlink_add_device_impl("veth", name); |
| netlink_nest(IFLA_INFO_DATA); |
| netlink_nest(VETH_INFO_PEER); |
| nlmsg.pos += sizeof(struct ifinfomsg); |
| netlink_attr(IFLA_IFNAME, peer, strlen(peer)); |
| netlink_done(); |
| netlink_done(); |
| netlink_done(); |
| int err = netlink_send(sock); |
| (void)err; |
| } |
| |
| static void netlink_add_hsr(int sock, const char* name, const char* slave1, |
| const char* slave2) |
| { |
| netlink_add_device_impl("hsr", name); |
| netlink_nest(IFLA_INFO_DATA); |
| int ifindex1 = if_nametoindex(slave1); |
| netlink_attr(IFLA_HSR_SLAVE1, &ifindex1, sizeof(ifindex1)); |
| int ifindex2 = if_nametoindex(slave2); |
| netlink_attr(IFLA_HSR_SLAVE2, &ifindex2, sizeof(ifindex2)); |
| netlink_done(); |
| netlink_done(); |
| int err = netlink_send(sock); |
| (void)err; |
| } |
| |
| static void netlink_device_change(int sock, const char* name, bool up, |
| const char* master, const void* mac, |
| int macsize) |
| { |
| struct ifinfomsg hdr; |
| memset(&hdr, 0, sizeof(hdr)); |
| if (up) |
| hdr.ifi_flags = hdr.ifi_change = IFF_UP; |
| netlink_init(RTM_NEWLINK, 0, &hdr, sizeof(hdr)); |
| netlink_attr(IFLA_IFNAME, name, strlen(name)); |
| if (master) { |
| int ifindex = if_nametoindex(master); |
| netlink_attr(IFLA_MASTER, &ifindex, sizeof(ifindex)); |
| } |
| if (macsize) |
| netlink_attr(IFLA_ADDRESS, mac, macsize); |
| int err = netlink_send(sock); |
| (void)err; |
| } |
| |
| static int netlink_add_addr(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(RTM_NEWADDR, NLM_F_CREATE | NLM_F_REPLACE, &hdr, sizeof(hdr)); |
| netlink_attr(IFA_LOCAL, addr, addrsize); |
| netlink_attr(IFA_ADDRESS, addr, addrsize); |
| return netlink_send(sock); |
| } |
| |
| static void netlink_add_addr4(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(sock, dev, &in_addr, sizeof(in_addr)); |
| (void)err; |
| } |
| |
| static void netlink_add_addr6(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(sock, dev, &in6_addr, sizeof(in6_addr)); |
| (void)err; |
| } |
| |
| static void netlink_add_neigh(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(RTM_NEWNEIGH, NLM_F_EXCL | NLM_F_CREATE, &hdr, sizeof(hdr)); |
| netlink_attr(NDA_DST, addr, addrsize); |
| netlink_attr(NDA_LLADDR, mac, macsize); |
| int err = netlink_send(sock); |
| (void)err; |
| } |
| |
| static int tunfd = -1; |
| static int tun_frags_enabled; |
| #define SYZ_TUN_MAX_PACKET_SIZE 1000 |
| |
| #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(sock, TUN_IFACE, LOCAL_IPV4); |
| netlink_add_addr6(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(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(sock, TUN_IFACE, &in6_addr, sizeof(in6_addr), &macaddr, |
| ETH_ALEN); |
| macaddr = LOCAL_MAC; |
| netlink_device_change(sock, TUN_IFACE, true, 0, &macaddr, ETH_ALEN); |
| close(sock); |
| } |
| |
| #define DEV_IPV4 "172.20.20.%d" |
| #define DEV_IPV6 "fe80::%02x" |
| #define DEV_MAC 0x00aaaaaaaaaa |
| static void initialize_netdevices(void) |
| { |
| char netdevsim[16]; |
| sprintf(netdevsim, "netdevsim%d", (int)procid); |
| struct { |
| const char* type; |
| const char* dev; |
| } devtypes[] = { |
| {"ip6gretap", "ip6gretap0"}, {"bridge", "bridge0"}, |
| {"vcan", "vcan0"}, {"bond", "bond0"}, |
| {"team", "team0"}, {"dummy", "dummy0"}, |
| {"nlmon", "nlmon0"}, {"caif", "caif0"}, |
| {"batadv", "batadv0"}, {"vxcan", "vxcan1"}, |
| {"netdevsim", netdevsim}, {"veth", 0}, |
| }; |
| const char* devmasters[] = {"bridge", "bond", "team"}; |
| struct { |
| const char* name; |
| int macsize; |
| bool noipv6; |
| } devices[] = { |
| {"lo", ETH_ALEN}, |
| {"sit0", 0}, |
| {"bridge0", ETH_ALEN}, |
| {"vcan0", 0, true}, |
| {"tunl0", 0}, |
| {"gre0", 0}, |
| {"gretap0", ETH_ALEN}, |
| {"ip_vti0", 0}, |
| {"ip6_vti0", 0}, |
| {"ip6tnl0", 0}, |
| {"ip6gre0", 0}, |
| {"ip6gretap0", ETH_ALEN}, |
| {"erspan0", ETH_ALEN}, |
| {"bond0", ETH_ALEN}, |
| {"veth0", ETH_ALEN}, |
| {"veth1", ETH_ALEN}, |
| {"team0", ETH_ALEN}, |
| {"veth0_to_bridge", ETH_ALEN}, |
| {"veth1_to_bridge", ETH_ALEN}, |
| {"veth0_to_bond", ETH_ALEN}, |
| {"veth1_to_bond", ETH_ALEN}, |
| {"veth0_to_team", ETH_ALEN}, |
| {"veth1_to_team", ETH_ALEN}, |
| {"veth0_to_hsr", ETH_ALEN}, |
| {"veth1_to_hsr", ETH_ALEN}, |
| {"hsr0", 0}, |
| {"dummy0", ETH_ALEN}, |
| {"nlmon0", 0}, |
| {"vxcan1", 0, true}, |
| {"caif0", ETH_ALEN}, |
| {"batadv0", ETH_ALEN}, |
| {netdevsim, ETH_ALEN}, |
| }; |
| int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); |
| if (sock == -1) |
| exit(1); |
| unsigned i; |
| for (i = 0; i < sizeof(devtypes) / sizeof(devtypes[0]); i++) |
| netlink_add_device(sock, devtypes[i].type, devtypes[i].dev); |
| for (i = 0; i < sizeof(devmasters) / (sizeof(devmasters[0])); i++) { |
| char master[32], slave0[32], veth0[32], slave1[32], veth1[32]; |
| sprintf(slave0, "%s_slave_0", devmasters[i]); |
| sprintf(veth0, "veth0_to_%s", devmasters[i]); |
| netlink_add_veth(sock, slave0, veth0); |
| sprintf(slave1, "%s_slave_1", devmasters[i]); |
| sprintf(veth1, "veth1_to_%s", devmasters[i]); |
| netlink_add_veth(sock, slave1, veth1); |
| sprintf(master, "%s0", devmasters[i]); |
| netlink_device_change(sock, slave0, false, master, 0, 0); |
| netlink_device_change(sock, slave1, false, master, 0, 0); |
| } |
| netlink_device_change(sock, "bridge_slave_0", true, 0, 0, 0); |
| netlink_device_change(sock, "bridge_slave_1", true, 0, 0, 0); |
| netlink_add_veth(sock, "hsr_slave_0", "veth0_to_hsr"); |
| netlink_add_veth(sock, "hsr_slave_1", "veth1_to_hsr"); |
| netlink_add_hsr(sock, "hsr0", "hsr_slave_0", "hsr_slave_1"); |
| netlink_device_change(sock, "hsr_slave_0", true, 0, 0, 0); |
| netlink_device_change(sock, "hsr_slave_1", true, 0, 0, 0); |
| for (i = 0; i < sizeof(devices) / (sizeof(devices[0])); i++) { |
| char addr[32]; |
| sprintf(addr, DEV_IPV4, i + 10); |
| netlink_add_addr4(sock, devices[i].name, addr); |
| if (!devices[i].noipv6) { |
| sprintf(addr, DEV_IPV6, i + 10); |
| netlink_add_addr6(sock, devices[i].name, addr); |
| } |
| uint64_t macaddr = DEV_MAC + ((i + 10ull) << 40); |
| netlink_device_change(sock, devices[i].name, true, 0, &macaddr, |
| devices[i].macsize); |
| } |
| close(sock); |
| } |
| static void initialize_netdevices_init(void) |
| { |
| int sock = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); |
| if (sock == -1) |
| exit(1); |
| struct { |
| const char* type; |
| int macsize; |
| bool noipv6; |
| bool noup; |
| } devtypes[] = { |
| {"nr", 7, true}, {"rose", 5, true, true}, |
| }; |
| unsigned i; |
| for (i = 0; i < sizeof(devtypes) / sizeof(devtypes[0]); i++) { |
| char dev[32], addr[32]; |
| sprintf(dev, "%s%d", devtypes[i].type, (int)procid); |
| sprintf(addr, "172.30.%d.%d", i, (int)procid + 1); |
| netlink_add_addr4(sock, dev, addr); |
| if (!devtypes[i].noipv6) { |
| sprintf(addr, "fe88::%02x:%02x", i, (int)procid + 1); |
| netlink_add_addr6(sock, dev, addr); |
| } |
| int macsize = devtypes[i].macsize; |
| uint64_t macaddr = 0xbbbbbb + |
| ((unsigned long long)i << (8 * (macsize - 2))) + |
| (procid << (8 * (macsize - 1))); |
| netlink_device_change(sock, dev, !devtypes[i].noup, 0, &macaddr, macsize); |
| } |
| close(sock); |
| } |
| |
| static int read_tun(char* data, int size) |
| { |
| if (tunfd < 0) |
| return -1; |
| int rv = read(tunfd, data, size); |
| if (rv < 0) { |
| if (errno == EAGAIN) |
| return -1; |
| if (errno == EBADFD) |
| return -1; |
| exit(1); |
| } |
| return rv; |
| } |
| |
| #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 flush_tun() |
| { |
| char data[SYZ_TUN_MAX_PACKET_SIZE]; |
| while (read_tun(&data[0], sizeof(data)) != -1) { |
| } |
| } |
| |
| 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 int do_sandbox_none(void) |
| { |
| if (unshare(CLONE_NEWPID)) { |
| } |
| int pid = fork(); |
| if (pid != 0) |
| return wait_for_loop(pid); |
| setup_common(); |
| sandbox_common(); |
| initialize_netdevices_init(); |
| if (unshare(CLONE_NEWNET)) { |
| } |
| initialize_tun(); |
| initialize_netdevices(); |
| loop(); |
| exit(1); |
| } |
| |
| static void kill_and_wait(int pid, int* status) |
| { |
| kill(-pid, SIGKILL); |
| kill(pid, SIGKILL); |
| int i; |
| for (i = 0; i < 100; i++) { |
| if (waitpid(-1, status, WNOHANG | __WALL) == pid) |
| return; |
| usleep(1000); |
| } |
| DIR* dir = opendir("/sys/fs/fuse/connections"); |
| if (dir) { |
| for (;;) { |
| struct dirent* ent = readdir(dir); |
| if (!ent) |
| break; |
| if (strcmp(ent->d_name, ".") == 0 || strcmp(ent->d_name, "..") == 0) |
| continue; |
| char abort[300]; |
| snprintf(abort, sizeof(abort), "/sys/fs/fuse/connections/%s/abort", |
| ent->d_name); |
| int fd = open(abort, O_WRONLY); |
| if (fd == -1) { |
| continue; |
| } |
| if (write(fd, abort, 1) < 0) { |
| } |
| close(fd); |
| } |
| closedir(dir); |
| } else { |
| } |
| while (waitpid(-1, status, __WALL) != pid) { |
| } |
| } |
| |
| static void setup_test() |
| { |
| prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); |
| setpgrp(); |
| write_file("/proc/self/oom_score_adj", "1000"); |
| flush_tun(); |
| } |
| |
| static void close_fds() |
| { |
| int fd; |
| for (fd = 3; fd < 30; fd++) |
| close(fd); |
| } |
| |
| static void execute_one(void); |
| |
| #define WAIT_FLAGS __WALL |
| |
| static void loop(void) |
| { |
| int iter; |
| for (iter = 0;; iter++) { |
| int pid = fork(); |
| if (pid < 0) |
| exit(1); |
| if (pid == 0) { |
| setup_test(); |
| execute_one(); |
| close_fds(); |
| exit(0); |
| } |
| int status = 0; |
| uint64_t start = current_time_ms(); |
| for (;;) { |
| if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) |
| break; |
| sleep_ms(1); |
| if (current_time_ms() - start < 5 * 1000) |
| continue; |
| kill_and_wait(pid, &status); |
| break; |
| } |
| } |
| } |
| |
| void execute_one(void) |
| { |
| *(uint8_t*)0x20000000 = 0xaa; |
| *(uint8_t*)0x20000001 = 0xaa; |
| *(uint8_t*)0x20000002 = 0xaa; |
| *(uint8_t*)0x20000003 = 0xaa; |
| *(uint8_t*)0x20000004 = 0xaa; |
| *(uint8_t*)0x20000005 = 0xaa; |
| *(uint8_t*)0x20000006 = 0xaa; |
| *(uint8_t*)0x20000007 = 0xaa; |
| *(uint8_t*)0x20000008 = 0xaa; |
| *(uint8_t*)0x20000009 = 0xaa; |
| *(uint8_t*)0x2000000a = 0xaa; |
| *(uint8_t*)0x2000000b = 0xaa; |
| *(uint16_t*)0x2000000c = htobe16(0x800); |
| STORE_BY_BITMASK(uint8_t, , 0x2000000e, 5, 0, 4); |
| STORE_BY_BITMASK(uint8_t, , 0x2000000e, 4, 4, 4); |
| STORE_BY_BITMASK(uint8_t, , 0x2000000f, 0, 0, 2); |
| STORE_BY_BITMASK(uint8_t, , 0x2000000f, 0, 2, 6); |
| *(uint16_t*)0x20000010 = htobe16(0x28); |
| *(uint16_t*)0x20000012 = htobe16(0); |
| *(uint16_t*)0x20000014 = htobe16(0); |
| *(uint8_t*)0x20000016 = 0; |
| *(uint8_t*)0x20000017 = 0; |
| *(uint16_t*)0x20000018 = htobe16(0); |
| *(uint8_t*)0x2000001a = 0xac; |
| *(uint8_t*)0x2000001b = 0x14; |
| *(uint8_t*)0x2000001c = 0x14; |
| *(uint8_t*)0x2000001d = 0; |
| *(uint8_t*)0x2000001e = 0xac; |
| *(uint8_t*)0x2000001f = 0x14; |
| *(uint8_t*)0x20000020 = 0x23; |
| *(uint8_t*)0x20000021 = 0xbb; |
| *(uint8_t*)0x20000022 = 0xe; |
| *(uint8_t*)0x20000023 = 0; |
| *(uint16_t*)0x20000024 = htobe16(0); |
| *(uint16_t*)0x20000026 = htobe16(0); |
| *(uint16_t*)0x20000028 = htobe16(0); |
| *(uint32_t*)0x2000002a = htobe32(0); |
| *(uint32_t*)0x2000002e = htobe32(0); |
| *(uint32_t*)0x20000032 = htobe32(0); |
| *(uint32_t*)0x20000100 = 0; |
| *(uint32_t*)0x20000104 = 3; |
| *(uint32_t*)0x20000108 = 0; |
| *(uint32_t*)0x2000010c = 0xe; |
| *(uint32_t*)0x20000110 = 0xd77; |
| *(uint32_t*)0x20000114 = 0; |
| struct csum_inet csum_1; |
| csum_inet_init(&csum_1); |
| csum_inet_update(&csum_1, (const uint8_t*)0x20000022, 20); |
| *(uint16_t*)0x20000024 = csum_inet_digest(&csum_1); |
| struct csum_inet csum_2; |
| csum_inet_init(&csum_2); |
| csum_inet_update(&csum_2, (const uint8_t*)0x2000000e, 20); |
| *(uint16_t*)0x20000018 = csum_inet_digest(&csum_2); |
| syz_emit_ethernet(0x36, 0x20000000, 0x20000100); |
| *(uint8_t*)0x20002940 = 0xaa; |
| *(uint8_t*)0x20002941 = 0xaa; |
| *(uint8_t*)0x20002942 = 0xaa; |
| *(uint8_t*)0x20002943 = 0xaa; |
| *(uint8_t*)0x20002944 = 0xaa; |
| *(uint8_t*)0x20002945 = 0xbb; |
| *(uint8_t*)0x20002946 = 0; |
| *(uint8_t*)0x20002947 = 0; |
| *(uint8_t*)0x20002948 = 0; |
| *(uint8_t*)0x20002949 = 0; |
| *(uint8_t*)0x2000294a = 0; |
| *(uint8_t*)0x2000294b = 0; |
| *(uint16_t*)0x2000294c = htobe16(0x8847); |
| STORE_BY_BITMASK(uint32_t, htobe32, 0x2000294e, 8, 0, 8); |
| STORE_BY_BITMASK(uint32_t, htobe32, 0x2000294e, 5, 8, 1); |
| STORE_BY_BITMASK(uint32_t, htobe32, 0x2000294e, -1, 9, 3); |
| STORE_BY_BITMASK(uint32_t, htobe32, 0x2000294e, 5, 12, 20); |
| STORE_BY_BITMASK(uint32_t, htobe32, 0x20002952, 0, 0, 8); |
| STORE_BY_BITMASK(uint32_t, htobe32, 0x20002952, 3, 8, 1); |
| STORE_BY_BITMASK(uint32_t, htobe32, 0x20002952, 0x2b, 9, 3); |
| STORE_BY_BITMASK(uint32_t, htobe32, 0x20002952, 2, 12, 20); |
| STORE_BY_BITMASK(uint32_t, htobe32, 0x20002956, 7, 0, 8); |
| STORE_BY_BITMASK(uint32_t, htobe32, 0x20002956, 4, 8, 1); |
| STORE_BY_BITMASK(uint32_t, htobe32, 0x20002956, 0x101, 9, 3); |
| STORE_BY_BITMASK(uint32_t, htobe32, 0x20002956, 0x100, 12, 20); |
| STORE_BY_BITMASK(uint32_t, htobe32, 0x2000295a, 2, 0, 8); |
| STORE_BY_BITMASK(uint32_t, htobe32, 0x2000295a, 0, 8, 1); |
| STORE_BY_BITMASK(uint32_t, htobe32, 0x2000295a, 0x8001, 9, 3); |
| STORE_BY_BITMASK(uint32_t, htobe32, 0x2000295a, 7, 12, 20); |
| STORE_BY_BITMASK(uint32_t, htobe32, 0x2000295e, 8, 0, 8); |
| STORE_BY_BITMASK(uint32_t, htobe32, 0x2000295e, 7, 8, 1); |
| STORE_BY_BITMASK(uint32_t, htobe32, 0x2000295e, 0x39, 9, 3); |
| STORE_BY_BITMASK(uint32_t, htobe32, 0x2000295e, 8, 12, 20); |
| STORE_BY_BITMASK(uint8_t, , 0x20002962, 0, 0, 4); |
| STORE_BY_BITMASK(uint8_t, , 0x20002962, 6, 4, 4); |
| memcpy((void*)0x20002963, "\x63\xaf\x64", 3); |
| *(uint16_t*)0x20002966 = htobe16(0x104); |
| *(uint8_t*)0x20002968 = 0x2e; |
| *(uint8_t*)0x20002969 = 0x1c; |
| *(uint8_t*)0x2000296a = 0; |
| *(uint8_t*)0x2000296b = 0; |
| *(uint8_t*)0x2000296c = 0; |
| *(uint8_t*)0x2000296d = 0; |
| *(uint8_t*)0x2000296e = 0; |
| *(uint8_t*)0x2000296f = 0; |
| *(uint8_t*)0x20002970 = 0; |
| *(uint8_t*)0x20002971 = 0; |
| *(uint8_t*)0x20002972 = 0; |
| *(uint8_t*)0x20002973 = 0; |
| *(uint8_t*)0x20002974 = 0; |
| *(uint8_t*)0x20002975 = 0; |
| *(uint8_t*)0x20002976 = 0; |
| *(uint8_t*)0x20002977 = 0; |
| *(uint8_t*)0x20002978 = 0; |
| *(uint8_t*)0x20002979 = 0; |
| memcpy((void*)0x2000297a, |
| "\x2d\x72\xc7\xe0\x24\x11\x85\x49\xab\xda\x41\x59\xcb\xfd\x2e\x7b", |
| 16); |
| *(uint8_t*)0x2000298a = 0x5e; |
| *(uint8_t*)0x2000298b = 6; |
| *(uint8_t*)0x2000298c = 0; |
| *(uint8_t*)0x2000298d = 0; |
| *(uint8_t*)0x2000298e = 0; |
| *(uint8_t*)0x2000298f = 0; |
| *(uint8_t*)0x20002990 = 0; |
| *(uint8_t*)0x20002991 = 0; |
| *(uint8_t*)0x20002992 = 7; |
| *(uint8_t*)0x20002993 = 0x30; |
| *(uint32_t*)0x20002994 = htobe32(5); |
| *(uint8_t*)0x20002998 = 0xa; |
| *(uint8_t*)0x20002999 = 1; |
| *(uint16_t*)0x2000299a = 8; |
| *(uint64_t*)0x2000299c = 0x8f; |
| *(uint64_t*)0x200029a4 = 0xfffffffffffff800; |
| *(uint64_t*)0x200029ac = 0x1f; |
| *(uint64_t*)0x200029b4 = 0xfffffffffffffffc; |
| *(uint64_t*)0x200029bc = 8; |
| *(uint8_t*)0x200029ca = 0x6f; |
| *(uint8_t*)0x200029cb = 0xe; |
| *(uint8_t*)0x200029cc = 0; |
| *(uint8_t*)0x200029cd = 0xfc; |
| *(uint32_t*)0x200029ce = 0; |
| *(uint8_t*)0x200029d2 = 0xfe; |
| *(uint8_t*)0x200029d3 = 0x80; |
| *(uint8_t*)0x200029d4 = 0; |
| *(uint8_t*)0x200029d5 = 0; |
| *(uint8_t*)0x200029d6 = 0; |
| *(uint8_t*)0x200029d7 = 0; |
| *(uint8_t*)0x200029d8 = 0; |
| *(uint8_t*)0x200029d9 = 0; |
| *(uint8_t*)0x200029da = 0; |
| *(uint8_t*)0x200029db = 0; |
| *(uint8_t*)0x200029dc = 0; |
| *(uint8_t*)0x200029dd = 0; |
| *(uint8_t*)0x200029de = 0; |
| *(uint8_t*)0x200029df = 0; |
| *(uint8_t*)0x200029e0 = 0; |
| *(uint8_t*)0x200029e1 = 0x23; |
| *(uint8_t*)0x200029e2 = 0xfe; |
| *(uint8_t*)0x200029e3 = 0x88; |
| *(uint8_t*)0x200029e4 = 0; |
| *(uint8_t*)0x200029e5 = 0; |
| *(uint8_t*)0x200029e6 = 0; |
| *(uint8_t*)0x200029e7 = 0; |
| *(uint8_t*)0x200029e8 = 0; |
| *(uint8_t*)0x200029e9 = 0; |
| *(uint8_t*)0x200029ea = 0; |
| *(uint8_t*)0x200029eb = 0; |
| *(uint8_t*)0x200029ec = 0; |
| *(uint8_t*)0x200029ed = 0; |
| *(uint8_t*)0x200029ee = 0; |
| *(uint8_t*)0x200029ef = 0; |
| *(uint8_t*)0x200029f0 = 0; |
| *(uint8_t*)0x200029f1 = 1; |
| *(uint64_t*)0x200029f2 = htobe64(0); |
| *(uint64_t*)0x200029fa = htobe64(1); |
| *(uint8_t*)0x20002a02 = 0xfe; |
| *(uint8_t*)0x20002a03 = 0x80; |
| *(uint8_t*)0x20002a04 = 0; |
| *(uint8_t*)0x20002a05 = 0; |
| *(uint8_t*)0x20002a06 = 0; |
| *(uint8_t*)0x20002a07 = 0; |
| *(uint8_t*)0x20002a08 = 0; |
| *(uint8_t*)0x20002a09 = 0; |
| *(uint8_t*)0x20002a0a = 0; |
| *(uint8_t*)0x20002a0b = 0; |
| *(uint8_t*)0x20002a0c = 0; |
| *(uint8_t*)0x20002a0d = 0; |
| *(uint8_t*)0x20002a0e = 0; |
| *(uint8_t*)0x20002a0f = 0; |
| *(uint8_t*)0x20002a10 = 0; |
| *(uint8_t*)0x20002a11 = 0xbb; |
| *(uint8_t*)0x20002a12 = -1; |
| *(uint8_t*)0x20002a13 = 1; |
| *(uint8_t*)0x20002a14 = 0; |
| *(uint8_t*)0x20002a15 = 0; |
| *(uint8_t*)0x20002a16 = 0; |
| *(uint8_t*)0x20002a17 = 0; |
| *(uint8_t*)0x20002a18 = 0; |
| *(uint8_t*)0x20002a19 = 0; |
| *(uint8_t*)0x20002a1a = 0; |
| *(uint8_t*)0x20002a1b = 0; |
| *(uint8_t*)0x20002a1c = 0; |
| *(uint8_t*)0x20002a1d = 0; |
| *(uint8_t*)0x20002a1e = 0; |
| *(uint8_t*)0x20002a1f = 0; |
| *(uint8_t*)0x20002a20 = 0; |
| *(uint8_t*)0x20002a21 = 1; |
| *(uint8_t*)0x20002a22 = 0; |
| *(uint8_t*)0x20002a23 = 0; |
| *(uint8_t*)0x20002a24 = 0; |
| *(uint8_t*)0x20002a25 = 0; |
| *(uint8_t*)0x20002a26 = 0; |
| *(uint8_t*)0x20002a27 = 0; |
| *(uint8_t*)0x20002a28 = 0; |
| *(uint8_t*)0x20002a29 = 0; |
| *(uint8_t*)0x20002a2a = 0; |
| *(uint8_t*)0x20002a2b = 0; |
| *(uint8_t*)0x20002a2c = -1; |
| *(uint8_t*)0x20002a2d = -1; |
| *(uint8_t*)0x20002a2e = 0xac; |
| *(uint8_t*)0x20002a2f = 0x14; |
| *(uint8_t*)0x20002a30 = 0x14; |
| *(uint8_t*)0x20002a31 = 0xbb; |
| *(uint8_t*)0x20002a32 = -1; |
| *(uint8_t*)0x20002a33 = 2; |
| *(uint8_t*)0x20002a34 = 0; |
| *(uint8_t*)0x20002a35 = 0; |
| *(uint8_t*)0x20002a36 = 0; |
| *(uint8_t*)0x20002a37 = 0; |
| *(uint8_t*)0x20002a38 = 0; |
| *(uint8_t*)0x20002a39 = 0; |
| *(uint8_t*)0x20002a3a = 0; |
| *(uint8_t*)0x20002a3b = 0; |
| *(uint8_t*)0x20002a3c = 0; |
| *(uint8_t*)0x20002a3d = 0; |
| *(uint8_t*)0x20002a3e = 0; |
| *(uint8_t*)0x20002a3f = 0; |
| *(uint8_t*)0x20002a40 = 0; |
| *(uint8_t*)0x20002a41 = 1; |
| STORE_BY_BITMASK(uint16_t, , 0x20002a42, 0, 0, 1); |
| STORE_BY_BITMASK(uint16_t, , 0x20002a42, 0, 1, 1); |
| STORE_BY_BITMASK(uint16_t, , 0x20002a42, 1, 2, 1); |
| STORE_BY_BITMASK(uint16_t, , 0x20002a42, 0x71, 3, 1); |
| STORE_BY_BITMASK(uint16_t, , 0x20002a42, 0, 4, 4); |
| STORE_BY_BITMASK(uint16_t, , 0x20002a42, 1, 8, 1); |
| STORE_BY_BITMASK(uint16_t, , 0x20002a42, 0, 9, 4); |
| STORE_BY_BITMASK(uint16_t, , 0x20002a42, 1, 13, 3); |
| *(uint16_t*)0x20002a44 = htobe16(0x880b); |
| *(uint16_t*)0x20002a46 = htobe16(0); |
| *(uint16_t*)0x20002a48 = htobe16(2); |
| *(uint16_t*)0x20002a4a = htobe16(3); |
| STORE_BY_BITMASK(uint16_t, , 0x20002a4c, 1, 0, 1); |
| STORE_BY_BITMASK(uint16_t, , 0x20002a4c, 0, 1, 1); |
| STORE_BY_BITMASK(uint16_t, , 0x20002a4c, 0xff04, 2, 1); |
| STORE_BY_BITMASK(uint16_t, , 0x20002a4c, 6, 3, 1); |
| STORE_BY_BITMASK(uint16_t, , 0x20002a4c, 0, 4, 9); |
| STORE_BY_BITMASK(uint16_t, , 0x20002a4c, 0, 13, 3); |
| *(uint16_t*)0x20002a4e = htobe16(0x800); |
| *(uint16_t*)0x20002a50 = htobe16(0x40); |
| STORE_BY_BITMASK(uint16_t, , 0x20002a52, 1, 0, 1); |
| STORE_BY_BITMASK(uint16_t, , 0x20002a52, 0, 1, 1); |
| STORE_BY_BITMASK(uint16_t, , 0x20002a52, 0x930c, 2, 1); |
| STORE_BY_BITMASK(uint16_t, , 0x20002a52, 1, 3, 1); |
| STORE_BY_BITMASK(uint16_t, , 0x20002a52, 0, 4, 9); |
| STORE_BY_BITMASK(uint16_t, , 0x20002a52, 0, 13, 3); |
| *(uint16_t*)0x20002a54 = htobe16(0x86dd); |
| *(uint16_t*)0x20002a56 = htobe16(0xcc); |
| *(uint16_t*)0x20002a58 = htobe16(0x7f); |
| *(uint16_t*)0x20002a5a = 8; |
| *(uint16_t*)0x20002a5c = htobe16(0x88be); |
| *(uint32_t*)0x20002a5e = htobe32(0); |
| STORE_BY_BITMASK(uint8_t, , 0x20002a62, 2, 0, 4); |
| STORE_BY_BITMASK(uint8_t, , 0x20002a62, 1, 4, 4); |
| *(uint8_t*)0x20002a63 = 5; |
| STORE_BY_BITMASK(uint8_t, , 0x20002a64, 3, 0, 2); |
| STORE_BY_BITMASK(uint8_t, , 0x20002a64, 7, 2, 1); |
| STORE_BY_BITMASK(uint8_t, , 0x20002a64, 2, 3, 2); |
| STORE_BY_BITMASK(uint8_t, , 0x20002a64, 0, 5, 3); |
| *(uint8_t*)0x20002a65 = 9; |
| *(uint32_t*)0x20002a66 = 1; |
| *(uint32_t*)0x20002a6a = htobe32(6); |
| *(uint16_t*)0x20002a6e = 8; |
| *(uint16_t*)0x20002a70 = htobe16(0x22eb); |
| *(uint32_t*)0x20002a72 = htobe32(3); |
| STORE_BY_BITMASK(uint8_t, , 0x20002a76, 9, 0, 4); |
| STORE_BY_BITMASK(uint8_t, , 0x20002a76, 2, 4, 4); |
| *(uint8_t*)0x20002a77 = 1; |
| STORE_BY_BITMASK(uint8_t, , 0x20002a78, 7, 0, 2); |
| STORE_BY_BITMASK(uint8_t, , 0x20002a78, 5, 2, 1); |
| STORE_BY_BITMASK(uint8_t, , 0x20002a78, 0, 3, 2); |
| STORE_BY_BITMASK(uint8_t, , 0x20002a78, 4, 5, 3); |
| *(uint8_t*)0x20002a79 = 9; |
| *(uint32_t*)0x20002a7a = 2; |
| *(uint32_t*)0x20002a7e = htobe32(8); |
| *(uint16_t*)0x20002a82 = htobe16(0x800); |
| STORE_BY_BITMASK(uint8_t, , 0x20002a84, 0, 0, 2); |
| STORE_BY_BITMASK(uint8_t, , 0x20002a84, 9, 2, 5); |
| STORE_BY_BITMASK(uint8_t, , 0x20002a84, 3, 7, 1); |
| STORE_BY_BITMASK(uint8_t, , 0x20002a85, 9, 0, 1); |
| STORE_BY_BITMASK(uint8_t, , 0x20002a85, 0x7f, 1, 2); |
| STORE_BY_BITMASK(uint8_t, , 0x20002a85, 6, 3, 1); |
| STORE_BY_BITMASK(uint8_t, , 0x20002a85, -1, 4, 1); |
| *(uint16_t*)0x20002a86 = 8; |
| *(uint16_t*)0x20002a88 = htobe16(0x6558); |
| *(uint32_t*)0x20002a8a = htobe32(0); |
| syz_emit_ethernet(0x14e, 0x20002940, 0); |
| } |
| int main(void) |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| do_sandbox_none(); |
| return 0; |
| } |