// https://syzkaller.appspot.com/bug?id=e98697201e604df4f4214fa9f7691b1249801550 // 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 #include #include static 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 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); } 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; #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 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; if (ioctl(tunfd, TUNSETIFF, (void*)&ifr) < 0) { exit(1); } 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); } struct fs_image_segment { void* data; uintptr_t size; uintptr_t offset; }; #define IMAGE_MAX_SEGMENTS 4096 #define IMAGE_MAX_SIZE (129 << 20) #define sys_memfd_create 319 static unsigned long fs_image_segment_check(unsigned long size, unsigned long nsegs, long segments) { unsigned long i; struct fs_image_segment* segs = (struct fs_image_segment*)segments; if (nsegs > IMAGE_MAX_SEGMENTS) nsegs = IMAGE_MAX_SEGMENTS; for (i = 0; i < nsegs; i++) { if (segs[i].size > IMAGE_MAX_SIZE) segs[i].size = IMAGE_MAX_SIZE; segs[i].offset %= IMAGE_MAX_SIZE; if (segs[i].offset > IMAGE_MAX_SIZE - segs[i].size) segs[i].offset = IMAGE_MAX_SIZE - segs[i].size; if (size < segs[i].offset + segs[i].offset) size = segs[i].offset + segs[i].offset; } if (size > IMAGE_MAX_SIZE) size = IMAGE_MAX_SIZE; return size; } static long syz_mount_image(volatile long fsarg, volatile long dir, volatile unsigned long size, volatile unsigned long nsegs, volatile long segments, volatile long flags, volatile long optsarg) { char loopname[64], fs[32], opts[256]; int loopfd, err = 0, res = -1; unsigned long i; NONFAILING(size = fs_image_segment_check(size, nsegs, segments)); int memfd = syscall(sys_memfd_create, "syz_mount_image", 0); if (memfd == -1) { err = errno; goto error; } if (ftruncate(memfd, size)) { err = errno; goto error_close_memfd; } for (i = 0; i < nsegs; i++) { struct fs_image_segment* segs = (struct fs_image_segment*)segments; int res1 = 0; NONFAILING(res1 = pwrite(memfd, segs[i].data, segs[i].size, segs[i].offset)); if (res1 < 0) { } } snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid); loopfd = open(loopname, O_RDWR); if (loopfd == -1) { err = errno; goto error_close_memfd; } if (ioctl(loopfd, LOOP_SET_FD, memfd)) { if (errno != EBUSY) { err = errno; goto error_close_loop; } ioctl(loopfd, LOOP_CLR_FD, 0); usleep(1000); if (ioctl(loopfd, LOOP_SET_FD, memfd)) { err = errno; goto error_close_loop; } } mkdir((char*)dir, 0777); memset(fs, 0, sizeof(fs)); NONFAILING(strncpy(fs, (char*)fsarg, sizeof(fs) - 1)); memset(opts, 0, sizeof(opts)); NONFAILING(strncpy(opts, (char*)optsarg, sizeof(opts) - 32)); if (strcmp(fs, "iso9660") == 0) { flags |= MS_RDONLY; } else if (strncmp(fs, "ext", 3) == 0) { if (strstr(opts, "errors=panic") || strstr(opts, "errors=remount-ro") == 0) strcat(opts, ",errors=continue"); } else if (strcmp(fs, "xfs") == 0) { strcat(opts, ",nouuid"); } if (mount(loopname, (char*)dir, fs, flags, opts)) { err = errno; goto error_clear_loop; } res = 0; error_clear_loop: ioctl(loopfd, LOOP_CLR_FD, 0); error_close_loop: close(loopfd); error_close_memfd: close(memfd); error: errno = err; return res; } 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); } static 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); } 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"); } void loop(void) { NONFAILING(memcpy((void*)0x20000100, "./file0\000", 8)); syscall(__NR_open, 0x20000100ul, 0x40c2ul, 0ul); NONFAILING(memcpy((void*)0x20000140, "minix\000", 6)); NONFAILING(memcpy((void*)0x20000080, "./file0\000", 8)); NONFAILING(*(uint64_t*)0x20000000 = 0x200000c0); NONFAILING(memcpy((void*)0x200000c0, "\x60\x00\x84\xe0\x02\x00\x0a\x00\x00" "\x00\x00\x01\x00\x00\x00\xc9\x8f\x13", 18)); NONFAILING(*(uint64_t*)0x20000008 = 0x12); NONFAILING(*(uint64_t*)0x20000010 = 0x400); NONFAILING(*(uint64_t*)0x20000018 = 0x20000880); NONFAILING(memcpy( (void*)0x20000880, "\xee\x9f\x84\xa4\x3e\xcc\xaf\x13\x15\xbb\x39\x7d\x00\xc1\xb6\xdd\x82\x0d" "\xd1\x39\x16\x18\x1d\xba\x62\x09\x38\xcb\x30\xf1\xc2\x1a\xfe\x3d\x92\x62" "\x98\xb2\x58\x34\xe8\x90\x09\x2d\x64\x2c\xaf\xe5\xdb\x21\xba\x94\x94\xfc" "\xbc\xf6\x60\x79\xb7\x22\xe7\x3b\xe3\xa8\x70\x8a\x36\x24\x25\x0f\x9f\x59" "\xfb\xbe\x94\x29\x97\xc6\xc1\xe8\x3a\x34\xe5\x77\x9e\x8a\x4f\x40\xfd\xb6" "\xff\xe5\x9f\xfe\x49\x03\x50\x0d\x3c\xd8\xc8\xf3\xed\x19\xad\x17\x6d\xaf" "\x94\xcf\x7f\xca\xf2\x92\x2f\x8a\xab\x3b\xec\xc6\x0c\x8d\x39\xdd\xf4\x3c" "\xd6\xd2\xe9\x30\x1d\xa3\xca\xa3\x57\x19\xf2\x5a\x83\x47\x85\x59\xe0\xe8" "\x91\xdc\xb7\x56\xee\x22\x96\x4d\x03\xf3\x75\x61\xf5\x79\x74\x90\xa0\xb9" "\x35\x06\x48\x28\x22\x07\x5b\xa9\x6d\xb3\x5a\x44\x0d\x04\x6e\x44\xeb\x4a" "\x79\x98\x6b\x51\x82\x81\x60\x90\x03\xb6\xfa\xe0\x4a\x18\xbe\x9a\x83\xce" "\x7e\xfa\x2a\xb8\x0f\x75\xc9\x0d\x78\xf0\xb4\x17\x9d\x67\x43\x76\xdb\x1f" "\x7a\xe8\x74\x56\x41\xad\xcd\xe0\xd2\x45\x72\x27\x44\xbc\xea\x2f\xac\x94" "\x45\x01\x4e\xe2\x29\x39\x85\x11\x95\x73\xff\xcc\x0c\x22\xeb\x07\x69\xde" "\x1e\x9e\x5d\xb5\x3a\xa3\x37\x8a\x44\x26\x50\x30\x10\xa7\xc6\x24\x72\x65" "\x83\x82\x11\x52\x7a\x01\x32\xcc\xf8\x83\xee\x08\xa6\xea\x1a\x78\x5e\x47" "\xce\x16\x66\x3f\x1c\x74\x4a\xf4\x92\x00\xd5\xf3\xbc\x32\x6e\x7d\x90\x89" "\xa5\xf1\x7d\x0a\xd0\x5f\x06\xe4\x8c\x20\x5f\x9b\x6d\x08\x7b\xa7\xd3\xb6" "\x74\x5e\x65\x70\x0c\x00\x95\x72\xa6\x5b\x4b\xfb\xf6\x68\x78\x21\xbc\x72" "\x3b\x61\xb5\xab\xe7\x35\x7e\x68\xa9\xb0\x64\x0b\xfb\x9c\x01\x00\x00\x80" "\x00\x00\x00\x00\x0e\x84\x0e\xcf\x37\x9c\x57\x6c\x05\x75\x7d\x44\xb1\x9d" "\xe0\xe2\xaa\x36\x4c\x42\x15\x62\x19\xa7\x2c\xc9\x43\xa6\x0f\x04\x10\x89" "\x1e\xd1\x34\xf3\x5f\x5f\xe6\xb4\xcf\x3a\xbb\xcb\x98\x44\x36\x32\x23\x58" "\xa7\xc9\x39\x37\x24\x86\x0d\x87\x25\x39\x81\xf9\xe7\x9d\xbe\xb7\x89\x57" "\x7e\xad\x0e\xde\x31\xe1\x9a\x2b\x11\x4a\x0e\x4d\x82\xb3\xe1\x02\x3d\xd2" "\x8b\x63\x82\xe6\x7e\x32\x46\xd2\x91\x2e\x55\xcf\x99\x28\xda\x32\xc1\x02" "\x7c\xef\x7c\x6c\x61\x0e\xa8\xfc\xe1\x49\xa7\xaf\x20\x22\x4b\x4e\x02\x86" "\x01\x93\x6e\xf9\xa7\x8d\x80\xff\x55\x67\x08\x4e\xc1\x28\x76\x6e\x82\x2d" "\x61\x24\x18\x6d\x82\xe7\x60\x12\x8d\xd7\xde\x26\x53\x93\x9d\x35\x3c\x12" "\xf9\x6d\xef\xf3\xa2\x8b\x02\x2c\x78\x4b\xd3\x7d\xf7\xf7\x66\x40\xbc\xbc" "\xb0\x1a\x46\x76\xd5\x8b\x3e\x9c\x2b\xaa\xe6\x62\x30\xe5\xf5\x4a\x37\x52" "\x7e\x81\x29\xd1\x61\xb0\xc0\x6f\x25\x64\x8c\x55\xa7\xe5\xb2\xdb\x52\x80" "\x53\xc3\xe3\x86\x4f\x41\x72\x8b\x79\x35\xe5\x75\x56\x8a\xd1\x14\xeb\x8c" "\x81\x1b\xd8\x9e\x07\xa3\x98\xba\xbb\xc6\x4f\xbe\xab\x84\x26\x88\x55\x47" "\x83\xed\x15\x51\x94\x9a\x79\x1e\x33\x79\x9e\x59\xa3\x4b\x6b\xda\xbc\x34" "\x58\xc3\x79\xc7\x35\x19\x82\x92\xe5\xa2\x72\x18\x74\x49\x24\x9d\x2c\x8a" "\x9a\xa5\x8f\x38\x35\xa3\xe1\x71\x60\x83\xbb\x04\xe4\xcb\xe1\x40\xd1\x58" "\x7a\x21\xe4\xec\x2a\xe1\xf3\xad\x81\x13\x4d\xf5\x59\x03\xff\xb8\xe1\x73" "\x64\x63\x52\x91\x5a\x2c\x70\x67\x09\xcf\x46\x53\x89\x78\x22\x4c\x0d\x6d" "\xc4\x37\xcb\xfc\x37\xab\xfb\xd1\xb7\x6f\xeb\x5c\xa3\xae\xb1\xac\x8c\xbd" "\x40\xd5\xba\x89\x6f\x79\xee\x8f\x76\xb0\x80\x9f\x59\xb8\x68\x62\x64\x87" "\x74\xd2\xac\xe9\x8b\x82\x5e\x7a\x46\x5b\x5d\xd8\x0e\x49\x19\x65\x97\x1e" "\x77\x97\xab\xa3\x96\x84\x41\xc7\x77\x17\xa2\x4c\xa4\x1e\xfb\x16\x0c\x03" "\x0c\xfc\x8e\x73\x87\x25\x40\xef\x4e\x5a\xec\xb0\xde\x86\xdd\x2a\x75\xbe" "\xe6\x1a\x93\x03\xa3\x32\x23\x3f\xf5\xa2\x59\xb0\x78\xa6", 806)); NONFAILING(*(uint64_t*)0x20000020 = 0x326); NONFAILING(*(uint64_t*)0x20000028 = 0x34f9); syz_mount_image(0x20000140, 0x20000080, 0x200000000, 2, 0x20000000, 0, 0); NONFAILING(memcpy((void*)0x20000480, "./file0\000", 8)); syscall(__NR_acct, 0x20000480ul); } 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); setup_binfmt_misc(); install_segv_handler(); use_temporary_dir(); do_sandbox_none(); return 0; }