| // KASAN: stack-out-of-bounds Read in timerqueue_add (2) |
| // https://syzkaller.appspot.com/bug?id=668693e5222d4c252d63a6d4c8c4628269adf9d8 |
| // status:dup |
| // 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 <setjmp.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 __thread int skip_segv; |
| static __thread jmp_buf segv_env; |
| |
| static void segv_handler(int sig, siginfo_t* info, void* ctx) |
| { |
| uintptr_t addr = (uintptr_t)info->si_addr; |
| const uintptr_t prog_start = 1 << 20; |
| const uintptr_t prog_end = 100 << 20; |
| if (__atomic_load_n(&skip_segv, __ATOMIC_RELAXED) && |
| (addr < prog_start || addr > prog_end)) { |
| _longjmp(segv_env, 1); |
| } |
| exit(sig); |
| } |
| |
| static void install_segv_handler(void) |
| { |
| struct sigaction sa; |
| memset(&sa, 0, sizeof(sa)); |
| sa.sa_handler = SIG_IGN; |
| syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8); |
| syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8); |
| memset(&sa, 0, sizeof(sa)); |
| sa.sa_sigaction = segv_handler; |
| sa.sa_flags = SA_NODEFER | SA_SIGINFO; |
| sigaction(SIGSEGV, &sa, NULL); |
| sigaction(SIGBUS, &sa, NULL); |
| } |
| |
| #define NONFAILING(...) \ |
| { \ |
| __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST); \ |
| if (_setjmp(segv_env) == 0) { \ |
| __VA_ARGS__; \ |
| } \ |
| __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST); \ |
| } |
| |
| 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; |
| } |
| |
| static void use_temporary_dir(void) |
| { |
| char tmpdir_template[] = "./syzkaller.XXXXXX"; |
| char* tmpdir = mkdtemp(tmpdir_template); |
| if (!tmpdir) |
| exit(1); |
| if (chmod(tmpdir, 0777)) |
| exit(1); |
| if (chdir(tmpdir)) |
| exit(1); |
| } |
| |
| #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; |
| } |
| |
| #define DEV_IPV4 "172.20.20.%d" |
| #define DEV_IPV6 "fe80::%02hx" |
| #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::%02hx:%02hx", 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); |
| } |
| |
| const int kInitNetNsFd = 239; |
| static long syz_init_net_socket(long domain, long type, long proto) |
| { |
| int netns = open("/proc/self/ns/net", O_RDONLY); |
| if (netns == -1) |
| return netns; |
| if (setns(kInitNetNsFd, 0)) |
| return -1; |
| int sock = syscall(__NR_socket, domain, type, proto); |
| int err = errno; |
| if (setns(netns, 0)) |
| exit(1); |
| close(netns); |
| errno = err; |
| return sock; |
| } |
| |
| static void setup_cgroups() |
| { |
| if (mkdir("/syzcgroup", 0777)) { |
| } |
| if (mkdir("/syzcgroup/unified", 0777)) { |
| } |
| if (mount("none", "/syzcgroup/unified", "cgroup2", 0, NULL)) { |
| } |
| if (chmod("/syzcgroup/unified", 0777)) { |
| } |
| write_file("/syzcgroup/unified/cgroup.subtree_control", |
| "+cpu +memory +io +pids +rdma"); |
| if (mkdir("/syzcgroup/cpu", 0777)) { |
| } |
| if (mount("none", "/syzcgroup/cpu", "cgroup", 0, |
| "cpuset,cpuacct,perf_event,hugetlb")) { |
| } |
| write_file("/syzcgroup/cpu/cgroup.clone_children", "1"); |
| if (chmod("/syzcgroup/cpu", 0777)) { |
| } |
| if (mkdir("/syzcgroup/net", 0777)) { |
| } |
| if (mount("none", "/syzcgroup/net", "cgroup", 0, |
| "net_cls,net_prio,devices,freezer")) { |
| } |
| if (chmod("/syzcgroup/net", 0777)) { |
| } |
| } |
| static void setup_binfmt_misc() |
| { |
| if (mount(0, "/proc/sys/fs/binfmt_misc", "binfmt_misc", 0, 0)) { |
| } |
| write_file("/proc/sys/fs/binfmt_misc/register", ":syz0:M:0:\x01::./file0:"); |
| write_file("/proc/sys/fs/binfmt_misc/register", |
| ":syz1:M:1:\x02::./file0:POC"); |
| } |
| |
| static void setup_common() |
| { |
| if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) { |
| } |
| setup_cgroups(); |
| setup_binfmt_misc(); |
| } |
| |
| static void loop(); |
| |
| static void sandbox_common() |
| { |
| prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); |
| setpgrp(); |
| setsid(); |
| int netns = open("/proc/self/ns/net", O_RDONLY); |
| if (netns == -1) |
| exit(1); |
| if (dup2(netns, kInitNetNsFd) < 0) |
| exit(1); |
| close(netns); |
| 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_netdevices(); |
| loop(); |
| exit(1); |
| } |
| |
| #define FS_IOC_SETFLAGS _IOW('f', 2, long) |
| static void remove_dir(const char* dir) |
| { |
| DIR* dp; |
| struct dirent* ep; |
| int iter = 0; |
| retry: |
| while (umount2(dir, MNT_DETACH) == 0) { |
| } |
| dp = opendir(dir); |
| if (dp == NULL) { |
| if (errno == EMFILE) { |
| exit(1); |
| } |
| exit(1); |
| } |
| while ((ep = readdir(dp))) { |
| if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0) |
| continue; |
| char filename[FILENAME_MAX]; |
| snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name); |
| while (umount2(filename, MNT_DETACH) == 0) { |
| } |
| struct stat st; |
| if (lstat(filename, &st)) |
| exit(1); |
| if (S_ISDIR(st.st_mode)) { |
| remove_dir(filename); |
| continue; |
| } |
| int i; |
| for (i = 0;; i++) { |
| if (unlink(filename) == 0) |
| break; |
| if (errno == EPERM) { |
| int fd = open(filename, O_RDONLY); |
| if (fd != -1) { |
| long flags = 0; |
| if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) |
| close(fd); |
| continue; |
| } |
| } |
| if (errno == EROFS) { |
| break; |
| } |
| if (errno != EBUSY || i > 100) |
| exit(1); |
| if (umount2(filename, MNT_DETACH)) |
| exit(1); |
| } |
| } |
| closedir(dp); |
| int i; |
| for (i = 0;; i++) { |
| if (rmdir(dir) == 0) |
| break; |
| if (i < 100) { |
| if (errno == EPERM) { |
| int fd = open(dir, O_RDONLY); |
| if (fd != -1) { |
| long flags = 0; |
| if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) |
| close(fd); |
| continue; |
| } |
| } |
| if (errno == EROFS) { |
| break; |
| } |
| if (errno == EBUSY) { |
| if (umount2(dir, MNT_DETACH)) |
| exit(1); |
| continue; |
| } |
| if (errno == ENOTEMPTY) { |
| if (iter < 100) { |
| iter++; |
| goto retry; |
| } |
| } |
| } |
| 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) { |
| } |
| } |
| |
| #define SYZ_HAVE_SETUP_LOOP 1 |
| static void setup_loop() |
| { |
| int pid = getpid(); |
| char cgroupdir[64]; |
| char file[128]; |
| snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/unified/syz%llu", procid); |
| if (mkdir(cgroupdir, 0777)) { |
| } |
| snprintf(file, sizeof(file), "%s/pids.max", cgroupdir); |
| write_file(file, "32"); |
| snprintf(file, sizeof(file), "%s/memory.low", cgroupdir); |
| write_file(file, "%d", 298 << 20); |
| snprintf(file, sizeof(file), "%s/memory.high", cgroupdir); |
| write_file(file, "%d", 299 << 20); |
| snprintf(file, sizeof(file), "%s/memory.max", cgroupdir); |
| write_file(file, "%d", 300 << 20); |
| snprintf(file, sizeof(file), "%s/cgroup.procs", cgroupdir); |
| write_file(file, "%d", pid); |
| snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/cpu/syz%llu", procid); |
| if (mkdir(cgroupdir, 0777)) { |
| } |
| snprintf(file, sizeof(file), "%s/cgroup.procs", cgroupdir); |
| write_file(file, "%d", pid); |
| snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/net/syz%llu", procid); |
| if (mkdir(cgroupdir, 0777)) { |
| } |
| snprintf(file, sizeof(file), "%s/cgroup.procs", cgroupdir); |
| write_file(file, "%d", pid); |
| } |
| |
| #define SYZ_HAVE_SETUP_TEST 1 |
| static void setup_test() |
| { |
| prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); |
| setpgrp(); |
| char cgroupdir[64]; |
| snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/unified/syz%llu", procid); |
| if (symlink(cgroupdir, "./cgroup")) { |
| } |
| snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/cpu/syz%llu", procid); |
| if (symlink(cgroupdir, "./cgroup.cpu")) { |
| } |
| snprintf(cgroupdir, sizeof(cgroupdir), "/syzcgroup/net/syz%llu", procid); |
| if (symlink(cgroupdir, "./cgroup.net")) { |
| } |
| write_file("/proc/self/oom_score_adj", "1000"); |
| } |
| |
| #define SYZ_HAVE_RESET_TEST 1 |
| static void reset_test() |
| { |
| int fd; |
| for (fd = 3; fd < 30; fd++) |
| close(fd); |
| } |
| |
| static void execute_one(void); |
| |
| #define WAIT_FLAGS __WALL |
| |
| static void loop(void) |
| { |
| setup_loop(); |
| int iter; |
| for (iter = 0;; iter++) { |
| char cwdbuf[32]; |
| sprintf(cwdbuf, "./%d", iter); |
| if (mkdir(cwdbuf, 0777)) |
| exit(1); |
| int pid = fork(); |
| if (pid < 0) |
| exit(1); |
| if (pid == 0) { |
| if (chdir(cwdbuf)) |
| exit(1); |
| setup_test(); |
| execute_one(); |
| reset_test(); |
| 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; |
| } |
| remove_dir(cwdbuf); |
| } |
| } |
| |
| uint64_t r[1] = {0xffffffffffffffff}; |
| |
| void execute_one(void) |
| { |
| long res = 0; |
| syscall(__NR_socketpair, 1, 5, 0, 0x20000200); |
| syscall(__NR_socket, 0xa, 0x801, 0x84); |
| syscall(__NR_wait4, 0, 0, 0x80000002, 0); |
| syscall(__NR_ptrace, 0x4206, 0, 0, 0); |
| NONFAILING(*(uint8_t*)0x200000c0 = 0); |
| NONFAILING(*(uint8_t*)0x200000c1 = 0); |
| NONFAILING(*(uint8_t*)0x200000c2 = 0); |
| NONFAILING(*(uint8_t*)0x200000c3 = 0); |
| NONFAILING(*(uint8_t*)0x200000c4 = 0); |
| NONFAILING(*(uint8_t*)0x200000c5 = 0); |
| NONFAILING(*(uint8_t*)0x200000c6 = 0); |
| NONFAILING(*(uint8_t*)0x200000c7 = 0); |
| NONFAILING(*(uint8_t*)0x200000c8 = 0); |
| NONFAILING(*(uint8_t*)0x200000c9 = 0); |
| NONFAILING(*(uint8_t*)0x200000ca = 0); |
| NONFAILING(*(uint8_t*)0x200000cb = 0); |
| NONFAILING(*(uint8_t*)0x200000cc = 0); |
| NONFAILING(*(uint8_t*)0x200000cd = 0); |
| NONFAILING(*(uint8_t*)0x200000ce = 0); |
| NONFAILING(*(uint8_t*)0x200000cf = 0); |
| NONFAILING(*(uint8_t*)0x200000d0 = 0); |
| NONFAILING(*(uint8_t*)0x200000d1 = 0); |
| NONFAILING(*(uint8_t*)0x200000d2 = 0); |
| NONFAILING(*(uint8_t*)0x200000d3 = 0); |
| NONFAILING(*(uint8_t*)0x200000d4 = 0); |
| NONFAILING(*(uint8_t*)0x200000d5 = 0); |
| NONFAILING(*(uint8_t*)0x200000d6 = 0); |
| NONFAILING(*(uint8_t*)0x200000d7 = 0); |
| NONFAILING(*(uint8_t*)0x200000d8 = 0); |
| NONFAILING(*(uint8_t*)0x200000d9 = 0); |
| NONFAILING(*(uint8_t*)0x200000da = 0); |
| NONFAILING(*(uint8_t*)0x200000db = 0); |
| NONFAILING(*(uint8_t*)0x200000dc = 0); |
| NONFAILING(*(uint8_t*)0x200000dd = 0); |
| NONFAILING(*(uint8_t*)0x200000de = 0); |
| NONFAILING(*(uint8_t*)0x200000df = 0); |
| NONFAILING(*(uint16_t*)0x200000e0 = 0); |
| NONFAILING(*(uint32_t*)0x200000e4 = 0); |
| NONFAILING(*(uint32_t*)0x200000e8 = 0); |
| NONFAILING(*(uint64_t*)0x200000f0 = 3); |
| NONFAILING(*(uint64_t*)0x200000f8 = 0x30); |
| NONFAILING(*(uint32_t*)0x20000100 = 0); |
| syscall(__NR_ioctl, -1, 0xc0481273, 0x200000c0); |
| syscall(__NR_ioctl, -1, 0x40045565, 0); |
| syz_init_net_socket(0x1a, 2, 0); |
| syscall(__NR_ioctl, -1, 0x40087703, 0); |
| syscall(__NR_openat, 0xffffffffffffff9c, 0, 0x40802, 0); |
| res = syscall(__NR_socket, 0xa, 2, 0); |
| if (res != -1) |
| r[0] = res; |
| NONFAILING(*(uint8_t*)0x20000000 = 0); |
| NONFAILING(*(uint8_t*)0x20000001 = 0); |
| NONFAILING(*(uint8_t*)0x20000002 = 0); |
| NONFAILING(*(uint8_t*)0x20000003 = 0); |
| NONFAILING(*(uint8_t*)0x20000004 = 0); |
| NONFAILING(*(uint8_t*)0x20000005 = 0); |
| NONFAILING(*(uint8_t*)0x20000006 = 0); |
| NONFAILING(*(uint8_t*)0x20000007 = 0); |
| syscall(__NR_setsockopt, r[0], 0x29, 0x3b, 0x20000000, 8); |
| NONFAILING(*(uint16_t*)0x200000c0 = 0xa); |
| NONFAILING(*(uint16_t*)0x200000c2 = htobe16(0)); |
| NONFAILING(*(uint32_t*)0x200000c4 = 0); |
| NONFAILING(*(uint8_t*)0x200000c8 = 0xfe); |
| NONFAILING(*(uint8_t*)0x200000c9 = 0x80); |
| NONFAILING(*(uint8_t*)0x200000ca = 0); |
| NONFAILING(*(uint8_t*)0x200000cb = 0); |
| NONFAILING(*(uint8_t*)0x200000cc = 0); |
| NONFAILING(*(uint8_t*)0x200000cd = 0); |
| NONFAILING(*(uint8_t*)0x200000ce = 0); |
| NONFAILING(*(uint8_t*)0x200000cf = 0); |
| NONFAILING(*(uint8_t*)0x200000d0 = 0); |
| NONFAILING(*(uint8_t*)0x200000d1 = 0); |
| NONFAILING(*(uint8_t*)0x200000d2 = 0); |
| NONFAILING(*(uint8_t*)0x200000d3 = 0); |
| NONFAILING(*(uint8_t*)0x200000d4 = 0); |
| NONFAILING(*(uint8_t*)0x200000d5 = 0); |
| NONFAILING(*(uint8_t*)0x200000d6 = 0); |
| NONFAILING(*(uint8_t*)0x200000d7 = 0); |
| NONFAILING(*(uint32_t*)0x200000d8 = 4); |
| syscall(__NR_connect, r[0], 0x200000c0, 0x1c); |
| syscall(__NR_sendmmsg, r[0], 0x20005fc0, 0x8000000000000fc, 0x8000000); |
| NONFAILING(memcpy((void*)0x20000080, "/dev/nullb0\x00", 12)); |
| syscall(__NR_openat, 0xffffffffffffff9c, 0x20000080, 0x4000000004002, 0); |
| NONFAILING(*(uint64_t*)0x20000080 = 0); |
| NONFAILING(*(uint32_t*)0x20000088 = 0); |
| NONFAILING(*(uint64_t*)0x20000090 = 0x20005ff0); |
| NONFAILING(*(uint64_t*)0x20005ff0 = 0x20008000); |
| NONFAILING(memcpy((void*)0x20008000, |
| "\x05\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00\x00\x00" |
| "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x02\x01\x00\x00\x00", |
| 28)); |
| NONFAILING(*(uint64_t*)0x20005ff8 = 0x1c); |
| NONFAILING(*(uint64_t*)0x20000098 = 1); |
| NONFAILING(*(uint64_t*)0x200000a0 = 0); |
| NONFAILING(*(uint64_t*)0x200000a8 = 0); |
| NONFAILING(*(uint32_t*)0x200000b0 = 0); |
| syscall(__NR_sendmsg, -1, 0x20000080, 0xfffffffffffffffc); |
| NONFAILING(*(uint8_t*)0x20000000 = 0xaa); |
| NONFAILING(*(uint8_t*)0x20000001 = 0xaa); |
| NONFAILING(*(uint8_t*)0x20000002 = 0xaa); |
| NONFAILING(*(uint8_t*)0x20000003 = 0xaa); |
| NONFAILING(*(uint8_t*)0x20000004 = 0xaa); |
| NONFAILING(*(uint8_t*)0x20000005 = 0xaa); |
| NONFAILING(*(uint8_t*)0x20000006 = 0); |
| NONFAILING(*(uint8_t*)0x20000007 = 0); |
| NONFAILING(*(uint8_t*)0x20000008 = 0); |
| NONFAILING(*(uint8_t*)0x20000009 = 0); |
| NONFAILING(*(uint8_t*)0x2000000a = 0); |
| NONFAILING(*(uint8_t*)0x2000000b = 0); |
| NONFAILING(*(uint16_t*)0x2000000c = htobe16(0x86dd)); |
| NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x2000000e, 0, 0, 4)); |
| NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x2000000e, 6, 4, 4)); |
| NONFAILING(memcpy((void*)0x2000000f, "\xb4\x09\x00", 3)); |
| NONFAILING(*(uint16_t*)0x20000012 = htobe16(0x5ca)); |
| NONFAILING(*(uint8_t*)0x20000014 = 0x2c); |
| NONFAILING(*(uint8_t*)0x20000015 = 0); |
| NONFAILING(*(uint8_t*)0x20000016 = 0); |
| NONFAILING(*(uint8_t*)0x20000017 = 0); |
| NONFAILING(*(uint8_t*)0x20000018 = 0); |
| NONFAILING(*(uint8_t*)0x20000019 = 0); |
| NONFAILING(*(uint8_t*)0x2000001a = 0); |
| NONFAILING(*(uint8_t*)0x2000001b = 0); |
| NONFAILING(*(uint8_t*)0x2000001c = 0); |
| NONFAILING(*(uint8_t*)0x2000001d = 0); |
| NONFAILING(*(uint8_t*)0x2000001e = 0); |
| NONFAILING(*(uint8_t*)0x2000001f = 0); |
| NONFAILING(*(uint8_t*)0x20000020 = -1); |
| NONFAILING(*(uint8_t*)0x20000021 = -1); |
| NONFAILING(*(uint32_t*)0x20000022 = htobe32(0xe0000002)); |
| NONFAILING(*(uint8_t*)0x20000026 = -1); |
| NONFAILING(*(uint8_t*)0x20000027 = 2); |
| NONFAILING(*(uint8_t*)0x20000028 = 0); |
| NONFAILING(*(uint8_t*)0x20000029 = 0); |
| NONFAILING(*(uint8_t*)0x2000002a = 0); |
| NONFAILING(*(uint8_t*)0x2000002b = 0); |
| NONFAILING(*(uint8_t*)0x2000002c = 0); |
| NONFAILING(*(uint8_t*)0x2000002d = 0); |
| NONFAILING(*(uint8_t*)0x2000002e = 0); |
| NONFAILING(*(uint8_t*)0x2000002f = 0); |
| NONFAILING(*(uint8_t*)0x20000030 = 0); |
| NONFAILING(*(uint8_t*)0x20000031 = 0); |
| NONFAILING(*(uint8_t*)0x20000032 = 0); |
| NONFAILING(*(uint8_t*)0x20000033 = 0); |
| NONFAILING(*(uint8_t*)0x20000034 = 0); |
| NONFAILING(*(uint8_t*)0x20000035 = 1); |
| NONFAILING(*(uint8_t*)0x20000036 = 0x88); |
| NONFAILING(*(uint8_t*)0x20000037 = 0); |
| NONFAILING(*(uint16_t*)0x20000038 = htobe16(0)); |
| NONFAILING(*(uint8_t*)0x2000003a = 0); |
| NONFAILING(*(uint8_t*)0x2000003b = 9); |
| NONFAILING(*(uint8_t*)0x2000003c = 4); |
| NONFAILING(*(uint8_t*)0x2000003d = 0); |
| NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x2000003e, 0, 0, 4)); |
| NONFAILING(STORE_BY_BITMASK(uint8_t, , 0x2000003e, 6, 4, 4)); |
| NONFAILING(memcpy((void*)0x2000003f, "\xb6\x80\xfa", 3)); |
| NONFAILING(*(uint16_t*)0x20000042 = htobe16(0)); |
| NONFAILING(*(uint8_t*)0x20000044 = 0); |
| NONFAILING(*(uint8_t*)0x20000045 = 0); |
| NONFAILING(*(uint8_t*)0x20000046 = 0); |
| NONFAILING(*(uint8_t*)0x20000047 = 0); |
| NONFAILING(*(uint8_t*)0x20000048 = 0); |
| NONFAILING(*(uint8_t*)0x20000049 = 0); |
| NONFAILING(*(uint8_t*)0x2000004a = 0); |
| NONFAILING(*(uint8_t*)0x2000004b = 0); |
| NONFAILING(*(uint8_t*)0x2000004c = 0); |
| NONFAILING(*(uint8_t*)0x2000004d = 0); |
| NONFAILING(*(uint8_t*)0x2000004e = 0); |
| NONFAILING(*(uint8_t*)0x2000004f = 0); |
| NONFAILING(*(uint8_t*)0x20000050 = -1); |
| NONFAILING(*(uint8_t*)0x20000051 = -1); |
| NONFAILING(*(uint32_t*)0x20000052 = htobe32(-1)); |
| NONFAILING(*(uint8_t*)0x20000056 = 0); |
| NONFAILING(*(uint8_t*)0x20000057 = 0); |
| NONFAILING(*(uint8_t*)0x20000058 = 0); |
| NONFAILING(*(uint8_t*)0x20000059 = 0); |
| NONFAILING(*(uint8_t*)0x2000005a = 0); |
| NONFAILING(*(uint8_t*)0x2000005b = 0); |
| NONFAILING(*(uint8_t*)0x2000005c = 0); |
| NONFAILING(*(uint8_t*)0x2000005d = 0); |
| NONFAILING(*(uint8_t*)0x2000005e = 0); |
| NONFAILING(*(uint8_t*)0x2000005f = 0); |
| NONFAILING(*(uint8_t*)0x20000060 = -1); |
| NONFAILING(*(uint8_t*)0x20000061 = -1); |
| NONFAILING(*(uint8_t*)0x20000062 = 0xac); |
| NONFAILING(*(uint8_t*)0x20000063 = 0x14); |
| NONFAILING(*(uint8_t*)0x20000064 = -1); |
| NONFAILING(*(uint8_t*)0x20000065 = 0xbb); |
| struct csum_inet csum_1; |
| csum_inet_init(&csum_1); |
| NONFAILING(csum_inet_update(&csum_1, (const uint8_t*)0x0, 16)); |
| NONFAILING(csum_inet_update(&csum_1, (const uint8_t*)0x0, 16)); |
| uint32_t csum_1_chunk_2 = 0x30000000; |
| csum_inet_update(&csum_1, (const uint8_t*)&csum_1_chunk_2, 4); |
| uint32_t csum_1_chunk_3 = 0x3a000000; |
| csum_inet_update(&csum_1, (const uint8_t*)&csum_1_chunk_3, 4); |
| NONFAILING(csum_inet_update(&csum_1, (const uint8_t*)0x0, 48)); |
| NONFAILING(*(uint16_t*)0x20000038 = csum_inet_digest(&csum_1)); |
| } |
| int main(void) |
| { |
| syscall(__NR_mmap, 0x20000000, 0x1000000, 3, 0x32, -1, 0); |
| install_segv_handler(); |
| for (procid = 0; procid < 6; procid++) { |
| if (fork() == 0) { |
| use_temporary_dir(); |
| do_sandbox_none(); |
| } |
| } |
| sleep(1000000); |
| return 0; |
| } |