// https://syzkaller.appspot.com/bug?id=762e7debe9358b9fb086b72671bc0b97bc686a88 // 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 #include #include #include #include #include #include #include #ifndef __NR_memfd_create #define __NR_memfd_create 319 #endif static unsigned long long procid; static __thread int clone_ongoing; static __thread int skip_segv; static __thread jmp_buf segv_env; static void segv_handler(int sig, siginfo_t* info, void* ctx) { if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) { exit(sig); } uintptr_t addr = (uintptr_t)info->si_addr; const uintptr_t prog_start = 1 << 20; const uintptr_t prog_end = 100 << 20; int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0; int valid = addr < prog_start || addr > prog_end; if (skip && valid) { _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(...) \ ({ \ int ok = 1; \ __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST); \ if (_setjmp(segv_env) == 0) { \ __VA_ARGS__; \ } else \ ok = 0; \ __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST); \ ok; \ }) 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); } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { int state; } event_t; static void event_init(event_t* ev) { ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { if (ev->state) exit(1); __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE); syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1000000); } static void event_wait(event_t* ev) { while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE)) syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0); } static int event_isset(event_t* ev) { return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE); } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; for (;;) { uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts); if (__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE)) return 1; now = current_time_ms(); if (now - start > timeout) return 0; } } 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[4096]; }; static void netlink_init(struct nlmsg* nlmsg, int typ, int flags, const void* data, int size) { memset(nlmsg, 0, sizeof(*nlmsg)); struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf; hdr->nlmsg_type = typ; hdr->nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK | flags; memcpy(hdr + 1, data, size); nlmsg->pos = (char*)(hdr + 1) + NLMSG_ALIGN(size); } static void netlink_attr(struct nlmsg* nlmsg, int typ, const void* data, int size) { struct nlattr* attr = (struct nlattr*)nlmsg->pos; attr->nla_len = sizeof(*attr) + size; attr->nla_type = typ; if (size > 0) memcpy(attr + 1, data, size); nlmsg->pos += NLMSG_ALIGN(attr->nla_len); } static int netlink_send_ext(struct nlmsg* nlmsg, int sock, uint16_t reply_type, int* reply_len, bool dofail) { if (nlmsg->pos > nlmsg->buf + sizeof(nlmsg->buf) || nlmsg->nesting) exit(1); struct nlmsghdr* hdr = (struct nlmsghdr*)nlmsg->buf; hdr->nlmsg_len = nlmsg->pos - nlmsg->buf; struct sockaddr_nl addr; memset(&addr, 0, sizeof(addr)); addr.nl_family = AF_NETLINK; ssize_t n = sendto(sock, nlmsg->buf, hdr->nlmsg_len, 0, (struct sockaddr*)&addr, sizeof(addr)); if (n != (ssize_t)hdr->nlmsg_len) { if (dofail) exit(1); return -1; } n = recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0); if (reply_len) *reply_len = 0; if (n < 0) { if (dofail) exit(1); return -1; } if (n < (ssize_t)sizeof(struct nlmsghdr)) { errno = EINVAL; if (dofail) exit(1); return -1; } if (hdr->nlmsg_type == NLMSG_DONE) return 0; if (reply_len && hdr->nlmsg_type == reply_type) { *reply_len = n; return 0; } if (n < (ssize_t)(sizeof(struct nlmsghdr) + sizeof(struct nlmsgerr))) { errno = EINVAL; if (dofail) exit(1); return -1; } if (hdr->nlmsg_type != NLMSG_ERROR) { errno = EINVAL; if (dofail) exit(1); return -1; } errno = -((struct nlmsgerr*)(hdr + 1))->error; return -errno; } static int netlink_send(struct nlmsg* nlmsg, int sock) { return netlink_send_ext(nlmsg, sock, 0, NULL, true); } static int netlink_query_family_id(struct nlmsg* nlmsg, int sock, const char* family_name, bool dofail) { struct genlmsghdr genlhdr; memset(&genlhdr, 0, sizeof(genlhdr)); genlhdr.cmd = CTRL_CMD_GETFAMILY; netlink_init(nlmsg, GENL_ID_CTRL, 0, &genlhdr, sizeof(genlhdr)); netlink_attr(nlmsg, CTRL_ATTR_FAMILY_NAME, family_name, strnlen(family_name, GENL_NAMSIZ - 1) + 1); int n = 0; int err = netlink_send_ext(nlmsg, sock, GENL_ID_CTRL, &n, dofail); if (err < 0) { return -1; } uint16_t id = 0; struct nlattr* attr = (struct nlattr*)(nlmsg->buf + NLMSG_HDRLEN + NLMSG_ALIGN(sizeof(genlhdr))); for (; (char*)attr < nlmsg->buf + n; attr = (struct nlattr*)((char*)attr + NLMSG_ALIGN(attr->nla_len))) { if (attr->nla_type == CTRL_ATTR_FAMILY_ID) { id = *(uint16_t*)(attr + 1); break; } } if (!id) { errno = EINVAL; return -1; } recv(sock, nlmsg->buf, sizeof(nlmsg->buf), 0); return id; } 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); if (err < 0) { } } 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)); if (err < 0) { } } 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)); if (err < 0) { } } 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); if (err < 0) { } } static struct nlmsg nlmsg; 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 = 200; 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); } 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 || errno == EBADF || errno == EBADFD) return -1; exit(1); } return rv; } static void flush_tun() { char data[1000]; while (read_tun(&data[0], sizeof(data)) != -1) { } } #define MAX_FDS 30 //% This code is derived from puff.{c,h}, found in the zlib development. The //% original files come with the following copyright notice: //% Copyright (C) 2002-2013 Mark Adler, all rights reserved //% version 2.3, 21 Jan 2013 //% This software is provided 'as-is', without any express or implied //% warranty. In no event will the author be held liable for any damages //% arising from the use of this software. //% Permission is granted to anyone to use this software for any purpose, //% including commercial applications, and to alter it and redistribute it //% freely, subject to the following restrictions: //% 1. The origin of this software must not be misrepresented; you must not //% claim that you wrote the original software. If you use this software //% in a product, an acknowledgment in the product documentation would be //% appreciated but is not required. //% 2. Altered source versions must be plainly marked as such, and must not be //% misrepresented as being the original software. //% 3. This notice may not be removed or altered from any source distribution. //% Mark Adler madler@alumni.caltech.edu //% BEGIN CODE DERIVED FROM puff.{c,h} #define MAXBITS 15 #define MAXLCODES 286 #define MAXDCODES 30 #define MAXCODES (MAXLCODES + MAXDCODES) #define FIXLCODES 288 struct puff_state { unsigned char* out; unsigned long outlen; unsigned long outcnt; const unsigned char* in; unsigned long inlen; unsigned long incnt; int bitbuf; int bitcnt; jmp_buf env; }; static int puff_bits(struct puff_state* s, int need) { long val = s->bitbuf; while (s->bitcnt < need) { if (s->incnt == s->inlen) longjmp(s->env, 1); val |= (long)(s->in[s->incnt++]) << s->bitcnt; s->bitcnt += 8; } s->bitbuf = (int)(val >> need); s->bitcnt -= need; return (int)(val & ((1L << need) - 1)); } static int puff_stored(struct puff_state* s) { s->bitbuf = 0; s->bitcnt = 0; if (s->incnt + 4 > s->inlen) return 2; unsigned len = s->in[s->incnt++]; len |= s->in[s->incnt++] << 8; if (s->in[s->incnt++] != (~len & 0xff) || s->in[s->incnt++] != ((~len >> 8) & 0xff)) return -2; if (s->incnt + len > s->inlen) return 2; if (s->outcnt + len > s->outlen) return 1; for (; len--; s->outcnt++, s->incnt++) { if (s->in[s->incnt]) s->out[s->outcnt] = s->in[s->incnt]; } return 0; } struct puff_huffman { short* count; short* symbol; }; static int puff_decode(struct puff_state* s, const struct puff_huffman* h) { int first = 0; int index = 0; int bitbuf = s->bitbuf; int left = s->bitcnt; int code = first = index = 0; int len = 1; short* next = h->count + 1; while (1) { while (left--) { code |= bitbuf & 1; bitbuf >>= 1; int count = *next++; if (code - count < first) { s->bitbuf = bitbuf; s->bitcnt = (s->bitcnt - len) & 7; return h->symbol[index + (code - first)]; } index += count; first += count; first <<= 1; code <<= 1; len++; } left = (MAXBITS + 1) - len; if (left == 0) break; if (s->incnt == s->inlen) longjmp(s->env, 1); bitbuf = s->in[s->incnt++]; if (left > 8) left = 8; } return -10; } static int puff_construct(struct puff_huffman* h, const short* length, int n) { int len; for (len = 0; len <= MAXBITS; len++) h->count[len] = 0; int symbol; for (symbol = 0; symbol < n; symbol++) (h->count[length[symbol]])++; if (h->count[0] == n) return 0; int left = 1; for (len = 1; len <= MAXBITS; len++) { left <<= 1; left -= h->count[len]; if (left < 0) return left; } short offs[MAXBITS + 1]; offs[1] = 0; for (len = 1; len < MAXBITS; len++) offs[len + 1] = offs[len] + h->count[len]; for (symbol = 0; symbol < n; symbol++) if (length[symbol] != 0) h->symbol[offs[length[symbol]]++] = symbol; return left; } static int puff_codes(struct puff_state* s, const struct puff_huffman* lencode, const struct puff_huffman* distcode) { static const short lens[29] = {3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 15, 17, 19, 23, 27, 31, 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258}; static const short lext[29] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 0}; static const short dists[30] = { 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577}; static const short dext[30] = {0, 0, 0, 0, 1, 1, 2, 2, 3, 3, 4, 4, 5, 5, 6, 6, 7, 7, 8, 8, 9, 9, 10, 10, 11, 11, 12, 12, 13, 13}; int symbol; do { symbol = puff_decode(s, lencode); if (symbol < 0) return symbol; if (symbol < 256) { if (s->outcnt == s->outlen) return 1; if (symbol) s->out[s->outcnt] = symbol; s->outcnt++; } else if (symbol > 256) { symbol -= 257; if (symbol >= 29) return -10; int len = lens[symbol] + puff_bits(s, lext[symbol]); symbol = puff_decode(s, distcode); if (symbol < 0) return symbol; unsigned dist = dists[symbol] + puff_bits(s, dext[symbol]); if (dist > s->outcnt) return -11; if (s->outcnt + len > s->outlen) return 1; while (len--) { if (dist <= s->outcnt && s->out[s->outcnt - dist]) s->out[s->outcnt] = s->out[s->outcnt - dist]; s->outcnt++; } } } while (symbol != 256); return 0; } static int puff_fixed(struct puff_state* s) { static int virgin = 1; static short lencnt[MAXBITS + 1], lensym[FIXLCODES]; static short distcnt[MAXBITS + 1], distsym[MAXDCODES]; static struct puff_huffman lencode, distcode; if (virgin) { lencode.count = lencnt; lencode.symbol = lensym; distcode.count = distcnt; distcode.symbol = distsym; short lengths[FIXLCODES]; int symbol; for (symbol = 0; symbol < 144; symbol++) lengths[symbol] = 8; for (; symbol < 256; symbol++) lengths[symbol] = 9; for (; symbol < 280; symbol++) lengths[symbol] = 7; for (; symbol < FIXLCODES; symbol++) lengths[symbol] = 8; puff_construct(&lencode, lengths, FIXLCODES); for (symbol = 0; symbol < MAXDCODES; symbol++) lengths[symbol] = 5; puff_construct(&distcode, lengths, MAXDCODES); virgin = 0; } return puff_codes(s, &lencode, &distcode); } static int puff_dynamic(struct puff_state* s) { static const short order[19] = {16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15}; int nlen = puff_bits(s, 5) + 257; int ndist = puff_bits(s, 5) + 1; int ncode = puff_bits(s, 4) + 4; if (nlen > MAXLCODES || ndist > MAXDCODES) return -3; short lengths[MAXCODES]; int index; for (index = 0; index < ncode; index++) lengths[order[index]] = puff_bits(s, 3); for (; index < 19; index++) lengths[order[index]] = 0; short lencnt[MAXBITS + 1], lensym[MAXLCODES]; struct puff_huffman lencode = {lencnt, lensym}; int err = puff_construct(&lencode, lengths, 19); if (err != 0) return -4; index = 0; while (index < nlen + ndist) { int symbol; int len; symbol = puff_decode(s, &lencode); if (symbol < 0) return symbol; if (symbol < 16) lengths[index++] = symbol; else { len = 0; if (symbol == 16) { if (index == 0) return -5; len = lengths[index - 1]; symbol = 3 + puff_bits(s, 2); } else if (symbol == 17) symbol = 3 + puff_bits(s, 3); else symbol = 11 + puff_bits(s, 7); if (index + symbol > nlen + ndist) return -6; while (symbol--) lengths[index++] = len; } } if (lengths[256] == 0) return -9; err = puff_construct(&lencode, lengths, nlen); if (err && (err < 0 || nlen != lencode.count[0] + lencode.count[1])) return -7; short distcnt[MAXBITS + 1], distsym[MAXDCODES]; struct puff_huffman distcode = {distcnt, distsym}; err = puff_construct(&distcode, lengths + nlen, ndist); if (err && (err < 0 || ndist != distcode.count[0] + distcode.count[1])) return -8; return puff_codes(s, &lencode, &distcode); } static int puff(unsigned char* dest, unsigned long* destlen, const unsigned char* source, unsigned long sourcelen) { struct puff_state s = { .out = dest, .outlen = *destlen, .outcnt = 0, .in = source, .inlen = sourcelen, .incnt = 0, .bitbuf = 0, .bitcnt = 0, }; int err; if (setjmp(s.env) != 0) err = 2; else { int last; do { last = puff_bits(&s, 1); int type = puff_bits(&s, 2); err = type == 0 ? puff_stored(&s) : (type == 1 ? puff_fixed(&s) : (type == 2 ? puff_dynamic(&s) : -1)); if (err != 0) break; } while (!last); } *destlen = s.outcnt; return err; } //% END CODE DERIVED FROM puff.{c,h} #define ZLIB_HEADER_WIDTH 2 static int puff_zlib_to_file(const unsigned char* source, unsigned long sourcelen, int dest_fd) { if (sourcelen < ZLIB_HEADER_WIDTH) return 0; source += ZLIB_HEADER_WIDTH; sourcelen -= ZLIB_HEADER_WIDTH; const unsigned long max_destlen = 132 << 20; void* ret = mmap(0, max_destlen, PROT_WRITE | PROT_READ, MAP_PRIVATE | MAP_ANON, -1, 0); if (ret == MAP_FAILED) return -1; unsigned char* dest = (unsigned char*)ret; unsigned long destlen = max_destlen; int err = puff(dest, &destlen, source, sourcelen); if (err) { munmap(dest, max_destlen); errno = -err; return -1; } if (write(dest_fd, dest, destlen) != (ssize_t)destlen) { munmap(dest, max_destlen); return -1; } return munmap(dest, max_destlen); } static int setup_loop_device(unsigned char* data, unsigned long size, const char* loopname, int* loopfd_p) { int err = 0, loopfd = -1; int memfd = syscall(__NR_memfd_create, "syzkaller", 0); if (memfd == -1) { err = errno; goto error; } if (puff_zlib_to_file(data, size, memfd)) { err = errno; goto error_close_memfd; } 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; } } close(memfd); *loopfd_p = loopfd; return 0; error_close_loop: close(loopfd); error_close_memfd: close(memfd); error: errno = err; return -1; } static void reset_loop_device(const char* loopname) { int loopfd = open(loopname, O_RDWR); if (loopfd == -1) { return; } if (ioctl(loopfd, LOOP_CLR_FD, 0)) { } close(loopfd); } static long syz_mount_image(volatile long fsarg, volatile long dir, volatile long flags, volatile long optsarg, volatile long change_dir, volatile unsigned long size, volatile long image) { unsigned char* data = (unsigned char*)image; int res = -1, err = 0, need_loop_device = !!size; char* mount_opts = (char*)optsarg; char* target = (char*)dir; char* fs = (char*)fsarg; char* source = NULL; char loopname[64]; if (need_loop_device) { int loopfd; memset(loopname, 0, sizeof(loopname)); snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid); if (setup_loop_device(data, size, loopname, &loopfd) == -1) return -1; close(loopfd); source = loopname; } mkdir(target, 0777); char opts[256]; memset(opts, 0, sizeof(opts)); if (strlen(mount_opts) > (sizeof(opts) - 32)) { } strncpy(opts, mount_opts, sizeof(opts) - 32); if (strcmp(fs, "iso9660") == 0) { flags |= MS_RDONLY; } else if (strncmp(fs, "ext", 3) == 0) { bool has_remount_ro = false; char* remount_ro_start = strstr(opts, "errors=remount-ro"); if (remount_ro_start != NULL) { char after = *(remount_ro_start + strlen("errors=remount-ro")); char before = remount_ro_start == opts ? '\0' : *(remount_ro_start - 1); has_remount_ro = ((before == '\0' || before == ',') && (after == '\0' || after == ',')); } if (strstr(opts, "errors=panic") || !has_remount_ro) strcat(opts, ",errors=continue"); } else if (strcmp(fs, "xfs") == 0) { strcat(opts, ",nouuid"); } res = mount(source, target, fs, flags, opts); if (res == -1) { err = errno; goto error_clear_loop; } res = open(target, O_RDONLY | O_DIRECTORY); if (res == -1) { err = errno; goto error_clear_loop; } if (change_dir) { res = chdir(target); if (res == -1) { err = errno; } } error_clear_loop: if (need_loop_device) reset_loop_device(loopname); errno = err; return res; } #define XT_TABLE_SIZE 1536 #define XT_MAX_ENTRIES 10 struct xt_counters { uint64_t pcnt, bcnt; }; struct ipt_getinfo { char name[32]; unsigned int valid_hooks; unsigned int hook_entry[5]; unsigned int underflow[5]; unsigned int num_entries; unsigned int size; }; struct ipt_get_entries { char name[32]; unsigned int size; uint64_t entrytable[XT_TABLE_SIZE / sizeof(uint64_t)]; }; struct ipt_replace { char name[32]; unsigned int valid_hooks; unsigned int num_entries; unsigned int size; unsigned int hook_entry[5]; unsigned int underflow[5]; unsigned int num_counters; struct xt_counters* counters; uint64_t entrytable[XT_TABLE_SIZE / sizeof(uint64_t)]; }; struct ipt_table_desc { const char* name; struct ipt_getinfo info; struct ipt_replace replace; }; static struct ipt_table_desc ipv4_tables[] = { {.name = "filter"}, {.name = "nat"}, {.name = "mangle"}, {.name = "raw"}, {.name = "security"}, }; static struct ipt_table_desc ipv6_tables[] = { {.name = "filter"}, {.name = "nat"}, {.name = "mangle"}, {.name = "raw"}, {.name = "security"}, }; #define IPT_BASE_CTL 64 #define IPT_SO_SET_REPLACE (IPT_BASE_CTL) #define IPT_SO_GET_INFO (IPT_BASE_CTL) #define IPT_SO_GET_ENTRIES (IPT_BASE_CTL + 1) struct arpt_getinfo { char name[32]; unsigned int valid_hooks; unsigned int hook_entry[3]; unsigned int underflow[3]; unsigned int num_entries; unsigned int size; }; struct arpt_get_entries { char name[32]; unsigned int size; uint64_t entrytable[XT_TABLE_SIZE / sizeof(uint64_t)]; }; struct arpt_replace { char name[32]; unsigned int valid_hooks; unsigned int num_entries; unsigned int size; unsigned int hook_entry[3]; unsigned int underflow[3]; unsigned int num_counters; struct xt_counters* counters; uint64_t entrytable[XT_TABLE_SIZE / sizeof(uint64_t)]; }; struct arpt_table_desc { const char* name; struct arpt_getinfo info; struct arpt_replace replace; }; static struct arpt_table_desc arpt_tables[] = { {.name = "filter"}, }; #define ARPT_BASE_CTL 96 #define ARPT_SO_SET_REPLACE (ARPT_BASE_CTL) #define ARPT_SO_GET_INFO (ARPT_BASE_CTL) #define ARPT_SO_GET_ENTRIES (ARPT_BASE_CTL + 1) static void checkpoint_iptables(struct ipt_table_desc* tables, int num_tables, int family, int level) { int fd = socket(family, SOCK_STREAM, IPPROTO_TCP); if (fd == -1) { switch (errno) { case EAFNOSUPPORT: case ENOPROTOOPT: case ENOENT: return; } exit(1); } for (int i = 0; i < num_tables; i++) { struct ipt_table_desc* table = &tables[i]; strcpy(table->info.name, table->name); strcpy(table->replace.name, table->name); socklen_t optlen = sizeof(table->info); if (getsockopt(fd, level, IPT_SO_GET_INFO, &table->info, &optlen)) { switch (errno) { case EPERM: case ENOENT: case ENOPROTOOPT: continue; } exit(1); } if (table->info.size > sizeof(table->replace.entrytable)) exit(1); if (table->info.num_entries > XT_MAX_ENTRIES) exit(1); struct ipt_get_entries entries; memset(&entries, 0, sizeof(entries)); strcpy(entries.name, table->name); entries.size = table->info.size; optlen = sizeof(entries) - sizeof(entries.entrytable) + table->info.size; if (getsockopt(fd, level, IPT_SO_GET_ENTRIES, &entries, &optlen)) exit(1); table->replace.valid_hooks = table->info.valid_hooks; table->replace.num_entries = table->info.num_entries; table->replace.size = table->info.size; memcpy(table->replace.hook_entry, table->info.hook_entry, sizeof(table->replace.hook_entry)); memcpy(table->replace.underflow, table->info.underflow, sizeof(table->replace.underflow)); memcpy(table->replace.entrytable, entries.entrytable, table->info.size); } close(fd); } static void reset_iptables(struct ipt_table_desc* tables, int num_tables, int family, int level) { int fd = socket(family, SOCK_STREAM, IPPROTO_TCP); if (fd == -1) { switch (errno) { case EAFNOSUPPORT: case ENOPROTOOPT: case ENOENT: return; } exit(1); } for (int i = 0; i < num_tables; i++) { struct ipt_table_desc* table = &tables[i]; if (table->info.valid_hooks == 0) continue; struct ipt_getinfo info; memset(&info, 0, sizeof(info)); strcpy(info.name, table->name); socklen_t optlen = sizeof(info); if (getsockopt(fd, level, IPT_SO_GET_INFO, &info, &optlen)) exit(1); if (memcmp(&table->info, &info, sizeof(table->info)) == 0) { struct ipt_get_entries entries; memset(&entries, 0, sizeof(entries)); strcpy(entries.name, table->name); entries.size = table->info.size; optlen = sizeof(entries) - sizeof(entries.entrytable) + entries.size; if (getsockopt(fd, level, IPT_SO_GET_ENTRIES, &entries, &optlen)) exit(1); if (memcmp(table->replace.entrytable, entries.entrytable, table->info.size) == 0) continue; } struct xt_counters counters[XT_MAX_ENTRIES]; table->replace.num_counters = info.num_entries; table->replace.counters = counters; optlen = sizeof(table->replace) - sizeof(table->replace.entrytable) + table->replace.size; if (setsockopt(fd, level, IPT_SO_SET_REPLACE, &table->replace, optlen)) exit(1); } close(fd); } static void checkpoint_arptables(void) { int fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (fd == -1) { switch (errno) { case EAFNOSUPPORT: case ENOPROTOOPT: case ENOENT: return; } exit(1); } for (unsigned i = 0; i < sizeof(arpt_tables) / sizeof(arpt_tables[0]); i++) { struct arpt_table_desc* table = &arpt_tables[i]; strcpy(table->info.name, table->name); strcpy(table->replace.name, table->name); socklen_t optlen = sizeof(table->info); if (getsockopt(fd, SOL_IP, ARPT_SO_GET_INFO, &table->info, &optlen)) { switch (errno) { case EPERM: case ENOENT: case ENOPROTOOPT: continue; } exit(1); } if (table->info.size > sizeof(table->replace.entrytable)) exit(1); if (table->info.num_entries > XT_MAX_ENTRIES) exit(1); struct arpt_get_entries entries; memset(&entries, 0, sizeof(entries)); strcpy(entries.name, table->name); entries.size = table->info.size; optlen = sizeof(entries) - sizeof(entries.entrytable) + table->info.size; if (getsockopt(fd, SOL_IP, ARPT_SO_GET_ENTRIES, &entries, &optlen)) exit(1); table->replace.valid_hooks = table->info.valid_hooks; table->replace.num_entries = table->info.num_entries; table->replace.size = table->info.size; memcpy(table->replace.hook_entry, table->info.hook_entry, sizeof(table->replace.hook_entry)); memcpy(table->replace.underflow, table->info.underflow, sizeof(table->replace.underflow)); memcpy(table->replace.entrytable, entries.entrytable, table->info.size); } close(fd); } static void reset_arptables() { int fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (fd == -1) { switch (errno) { case EAFNOSUPPORT: case ENOPROTOOPT: case ENOENT: return; } exit(1); } for (unsigned i = 0; i < sizeof(arpt_tables) / sizeof(arpt_tables[0]); i++) { struct arpt_table_desc* table = &arpt_tables[i]; if (table->info.valid_hooks == 0) continue; struct arpt_getinfo info; memset(&info, 0, sizeof(info)); strcpy(info.name, table->name); socklen_t optlen = sizeof(info); if (getsockopt(fd, SOL_IP, ARPT_SO_GET_INFO, &info, &optlen)) exit(1); if (memcmp(&table->info, &info, sizeof(table->info)) == 0) { struct arpt_get_entries entries; memset(&entries, 0, sizeof(entries)); strcpy(entries.name, table->name); entries.size = table->info.size; optlen = sizeof(entries) - sizeof(entries.entrytable) + entries.size; if (getsockopt(fd, SOL_IP, ARPT_SO_GET_ENTRIES, &entries, &optlen)) exit(1); if (memcmp(table->replace.entrytable, entries.entrytable, table->info.size) == 0) continue; } else { } struct xt_counters counters[XT_MAX_ENTRIES]; table->replace.num_counters = info.num_entries; table->replace.counters = counters; optlen = sizeof(table->replace) - sizeof(table->replace.entrytable) + table->replace.size; if (setsockopt(fd, SOL_IP, ARPT_SO_SET_REPLACE, &table->replace, optlen)) exit(1); } close(fd); } #define NF_BR_NUMHOOKS 6 #define EBT_TABLE_MAXNAMELEN 32 #define EBT_CHAIN_MAXNAMELEN 32 #define EBT_BASE_CTL 128 #define EBT_SO_SET_ENTRIES (EBT_BASE_CTL) #define EBT_SO_GET_INFO (EBT_BASE_CTL) #define EBT_SO_GET_ENTRIES (EBT_SO_GET_INFO + 1) #define EBT_SO_GET_INIT_INFO (EBT_SO_GET_ENTRIES + 1) #define EBT_SO_GET_INIT_ENTRIES (EBT_SO_GET_INIT_INFO + 1) struct ebt_replace { char name[EBT_TABLE_MAXNAMELEN]; unsigned int valid_hooks; unsigned int nentries; unsigned int entries_size; struct ebt_entries* hook_entry[NF_BR_NUMHOOKS]; unsigned int num_counters; struct ebt_counter* counters; char* entries; }; struct ebt_entries { unsigned int distinguisher; char name[EBT_CHAIN_MAXNAMELEN]; unsigned int counter_offset; int policy; unsigned int nentries; char data[0] __attribute__((aligned(__alignof__(struct ebt_replace)))); }; struct ebt_table_desc { const char* name; struct ebt_replace replace; char entrytable[XT_TABLE_SIZE]; }; static struct ebt_table_desc ebt_tables[] = { {.name = "filter"}, {.name = "nat"}, {.name = "broute"}, }; static void checkpoint_ebtables(void) { int fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (fd == -1) { switch (errno) { case EAFNOSUPPORT: case ENOPROTOOPT: case ENOENT: return; } exit(1); } for (size_t i = 0; i < sizeof(ebt_tables) / sizeof(ebt_tables[0]); i++) { struct ebt_table_desc* table = &ebt_tables[i]; strcpy(table->replace.name, table->name); socklen_t optlen = sizeof(table->replace); if (getsockopt(fd, SOL_IP, EBT_SO_GET_INIT_INFO, &table->replace, &optlen)) { switch (errno) { case EPERM: case ENOENT: case ENOPROTOOPT: continue; } exit(1); } if (table->replace.entries_size > sizeof(table->entrytable)) exit(1); table->replace.num_counters = 0; table->replace.entries = table->entrytable; optlen = sizeof(table->replace) + table->replace.entries_size; if (getsockopt(fd, SOL_IP, EBT_SO_GET_INIT_ENTRIES, &table->replace, &optlen)) exit(1); } close(fd); } static void reset_ebtables() { int fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP); if (fd == -1) { switch (errno) { case EAFNOSUPPORT: case ENOPROTOOPT: case ENOENT: return; } exit(1); } for (unsigned i = 0; i < sizeof(ebt_tables) / sizeof(ebt_tables[0]); i++) { struct ebt_table_desc* table = &ebt_tables[i]; if (table->replace.valid_hooks == 0) continue; struct ebt_replace replace; memset(&replace, 0, sizeof(replace)); strcpy(replace.name, table->name); socklen_t optlen = sizeof(replace); if (getsockopt(fd, SOL_IP, EBT_SO_GET_INFO, &replace, &optlen)) exit(1); replace.num_counters = 0; table->replace.entries = 0; for (unsigned h = 0; h < NF_BR_NUMHOOKS; h++) table->replace.hook_entry[h] = 0; if (memcmp(&table->replace, &replace, sizeof(table->replace)) == 0) { char entrytable[XT_TABLE_SIZE]; memset(&entrytable, 0, sizeof(entrytable)); replace.entries = entrytable; optlen = sizeof(replace) + replace.entries_size; if (getsockopt(fd, SOL_IP, EBT_SO_GET_ENTRIES, &replace, &optlen)) exit(1); if (memcmp(table->entrytable, entrytable, replace.entries_size) == 0) continue; } for (unsigned j = 0, h = 0; h < NF_BR_NUMHOOKS; h++) { if (table->replace.valid_hooks & (1 << h)) { table->replace.hook_entry[h] = (struct ebt_entries*)table->entrytable + j; j++; } } table->replace.entries = table->entrytable; optlen = sizeof(table->replace) + table->replace.entries_size; if (setsockopt(fd, SOL_IP, EBT_SO_SET_ENTRIES, &table->replace, optlen)) exit(1); } close(fd); } static void checkpoint_net_namespace(void) { checkpoint_ebtables(); checkpoint_arptables(); checkpoint_iptables(ipv4_tables, sizeof(ipv4_tables) / sizeof(ipv4_tables[0]), AF_INET, SOL_IP); checkpoint_iptables(ipv6_tables, sizeof(ipv6_tables) / sizeof(ipv6_tables[0]), AF_INET6, SOL_IPV6); } static void reset_net_namespace(void) { reset_ebtables(); reset_arptables(); reset_iptables(ipv4_tables, sizeof(ipv4_tables) / sizeof(ipv4_tables[0]), AF_INET, SOL_IP); reset_iptables(ipv6_tables, sizeof(ipv6_tables) / sizeof(ipv6_tables[0]), AF_INET6, SOL_IPV6); } static void mount_cgroups(const char* dir, const char** controllers, int count) { if (mkdir(dir, 0777)) { return; } char enabled[128] = {0}; int i = 0; for (; i < count; i++) { if (mount("none", dir, "cgroup", 0, controllers[i])) { continue; } umount(dir); strcat(enabled, ","); strcat(enabled, controllers[i]); } if (enabled[0] == 0) { if (rmdir(dir) && errno != EBUSY) exit(1); return; } if (mount("none", dir, "cgroup", 0, enabled + 1)) { if (rmdir(dir) && errno != EBUSY) exit(1); } if (chmod(dir, 0777)) { } } static void mount_cgroups2(const char** controllers, int count) { if (mkdir("/syzcgroup/unified", 0777)) { return; } if (mount("none", "/syzcgroup/unified", "cgroup2", 0, NULL)) { if (rmdir("/syzcgroup/unified") && errno != EBUSY) exit(1); return; } if (chmod("/syzcgroup/unified", 0777)) { } int control = open("/syzcgroup/unified/cgroup.subtree_control", O_WRONLY); if (control == -1) return; int i; for (i = 0; i < count; i++) if (write(control, controllers[i], strlen(controllers[i])) < 0) { } close(control); } static void setup_cgroups() { const char* unified_controllers[] = {"+cpu", "+io", "+pids"}; const char* net_controllers[] = {"net", "net_prio", "devices", "blkio", "freezer"}; const char* cpu_controllers[] = {"cpuset", "cpuacct", "hugetlb", "rlimit", "memory"}; if (mkdir("/syzcgroup", 0777)) { return; } mount_cgroups2(unified_controllers, sizeof(unified_controllers) / sizeof(unified_controllers[0])); mount_cgroups("/syzcgroup/net", net_controllers, sizeof(net_controllers) / sizeof(net_controllers[0])); mount_cgroups("/syzcgroup/cpu", cpu_controllers, sizeof(cpu_controllers) / sizeof(cpu_controllers[0])); write_file("/syzcgroup/cpu/cgroup.clone_children", "1"); write_file("/syzcgroup/cpu/cpuset.memory_pressure_enabled", "1"); } static void setup_cgroups_loop() { int pid = getpid(); char file[128]; char cgroupdir[64]; 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/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(file, sizeof(file), "%s/memory.soft_limit_in_bytes", cgroupdir); write_file(file, "%d", 299 << 20); snprintf(file, sizeof(file), "%s/memory.limit_in_bytes", cgroupdir); write_file(file, "%d", 300 << 20); 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); } static void setup_cgroups_test() { 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")) { } } static void initialize_cgroups() { if (mkdir("./syz-tmp/newroot/syzcgroup", 0700)) exit(1); if (mkdir("./syz-tmp/newroot/syzcgroup/unified", 0700)) exit(1); if (mkdir("./syz-tmp/newroot/syzcgroup/cpu", 0700)) exit(1); if (mkdir("./syz-tmp/newroot/syzcgroup/net", 0700)) exit(1); unsigned bind_mount_flags = MS_BIND | MS_REC | MS_PRIVATE; if (mount("/syzcgroup/unified", "./syz-tmp/newroot/syzcgroup/unified", NULL, bind_mount_flags, NULL)) { } if (mount("/syzcgroup/cpu", "./syz-tmp/newroot/syzcgroup/cpu", NULL, bind_mount_flags, NULL)) { } if (mount("/syzcgroup/net", "./syz-tmp/newroot/syzcgroup/net", NULL, bind_mount_flags, NULL)) { } } static void setup_binderfs(); static void setup_fusectl(); static void sandbox_common_mount_tmpfs(void) { write_file("/proc/sys/fs/mount-max", "100000"); if (mkdir("./syz-tmp", 0777)) exit(1); if (mount("", "./syz-tmp", "tmpfs", 0, NULL)) exit(1); if (mkdir("./syz-tmp/newroot", 0777)) exit(1); if (mkdir("./syz-tmp/newroot/dev", 0700)) exit(1); unsigned bind_mount_flags = MS_BIND | MS_REC | MS_PRIVATE; if (mount("/dev", "./syz-tmp/newroot/dev", NULL, bind_mount_flags, NULL)) exit(1); if (mkdir("./syz-tmp/newroot/proc", 0700)) exit(1); if (mount("syz-proc", "./syz-tmp/newroot/proc", "proc", 0, NULL)) exit(1); if (mkdir("./syz-tmp/newroot/selinux", 0700)) exit(1); const char* selinux_path = "./syz-tmp/newroot/selinux"; if (mount("/selinux", selinux_path, NULL, bind_mount_flags, NULL)) { if (errno != ENOENT) exit(1); if (mount("/sys/fs/selinux", selinux_path, NULL, bind_mount_flags, NULL) && errno != ENOENT) exit(1); } if (mkdir("./syz-tmp/newroot/sys", 0700)) exit(1); if (mount("/sys", "./syz-tmp/newroot/sys", 0, bind_mount_flags, NULL)) exit(1); if (mount("/sys/kernel/debug", "./syz-tmp/newroot/sys/kernel/debug", NULL, bind_mount_flags, NULL) && errno != ENOENT) exit(1); if (mount("/sys/fs/smackfs", "./syz-tmp/newroot/sys/fs/smackfs", NULL, bind_mount_flags, NULL) && errno != ENOENT) exit(1); if (mount("/proc/sys/fs/binfmt_misc", "./syz-tmp/newroot/proc/sys/fs/binfmt_misc", NULL, bind_mount_flags, NULL) && errno != ENOENT) exit(1); initialize_cgroups(); if (mkdir("./syz-tmp/pivot", 0777)) exit(1); if (syscall(SYS_pivot_root, "./syz-tmp", "./syz-tmp/pivot")) { if (chdir("./syz-tmp")) exit(1); } else { if (chdir("/")) exit(1); if (umount2("./pivot", MNT_DETACH)) exit(1); } if (chroot("./newroot")) exit(1); if (chdir("/")) exit(1); setup_binderfs(); setup_fusectl(); } static void setup_fusectl() { if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) { } } static void setup_binderfs() { if (mkdir("/dev/binderfs", 0777)) { } if (mount("binder", "/dev/binderfs", "binder", 0, NULL)) { } } static void loop(); static void sandbox_common() { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); if (getppid() == 1) exit(1); 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 = 128 << 20; setrlimit(RLIMIT_CORE, &rlim); rlim.rlim_cur = rlim.rlim_max = 256; setrlimit(RLIMIT_NOFILE, &rlim); if (unshare(CLONE_NEWNS)) { } if (mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, NULL)) { } 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); sandbox_common(); drop_caps(); if (unshare(CLONE_NEWNET)) { } write_file("/proc/sys/net/ipv4/ping_group_range", "0 65535"); initialize_tun(); sandbox_common_mount_tmpfs(); loop(); exit(1); } #define FS_IOC_SETFLAGS _IOW('f', 2, long) static void remove_dir(const char* dir) { int iter = 0; DIR* dp = 0; const int umount_flags = MNT_FORCE | UMOUNT_NOFOLLOW; retry: while (umount2(dir, umount_flags) == 0) { } dp = opendir(dir); if (dp == NULL) { if (errno == EMFILE) { exit(1); } exit(1); } struct dirent* ep = 0; 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, umount_flags) == 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, umount_flags)) exit(1); } } closedir(dp); for (int 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, umount_flags)) 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); for (int 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_loop() { setup_cgroups_loop(); checkpoint_net_namespace(); } static void reset_loop() { char buf[64]; snprintf(buf, sizeof(buf), "/dev/loop%llu", procid); int loopfd = open(buf, O_RDWR); if (loopfd != -1) { ioctl(loopfd, LOOP_CLR_FD, 0); close(loopfd); } reset_net_namespace(); } static void setup_test() { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); setpgrp(); setup_cgroups_test(); write_file("/proc/self/oom_score_adj", "1000"); flush_tun(); if (symlink("/dev/binderfs", "./binderfs")) { } } static void close_fds() { for (int fd = 3; fd < MAX_FDS; fd++) close(fd); } static const char* setup_binfmt_misc() { if (mount(0, "/proc/sys/fs/binfmt_misc", "binfmt_misc", 0, 0) && errno != EBUSY) { return NULL; } if (!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")) return "write(/proc/sys/fs/binfmt_misc/register) failed"; return NULL; } static const char* setup_usb() { if (chmod("/dev/raw-gadget", 0666)) return "failed to chmod /dev/raw-gadget"; return NULL; } static void setup_sysctl() { int cad_pid = fork(); if (cad_pid < 0) exit(1); if (cad_pid == 0) { for (;;) sleep(100); } char tmppid[32]; snprintf(tmppid, sizeof(tmppid), "%d", cad_pid); struct { const char* name; const char* data; } files[] = { {"/sys/kernel/debug/x86/nmi_longest_ns", "10000000000"}, {"/proc/sys/kernel/hung_task_check_interval_secs", "20"}, {"/proc/sys/net/core/bpf_jit_kallsyms", "1"}, {"/proc/sys/net/core/bpf_jit_harden", "0"}, {"/proc/sys/kernel/kptr_restrict", "0"}, {"/proc/sys/kernel/softlockup_all_cpu_backtrace", "1"}, {"/proc/sys/fs/mount-max", "100"}, {"/proc/sys/vm/oom_dump_tasks", "0"}, {"/proc/sys/debug/exception-trace", "0"}, {"/proc/sys/kernel/printk", "7 4 1 3"}, {"/proc/sys/kernel/keys/gc_delay", "1"}, {"/proc/sys/vm/oom_kill_allocating_task", "1"}, {"/proc/sys/kernel/ctrl-alt-del", "0"}, {"/proc/sys/kernel/cad_pid", tmppid}, }; for (size_t i = 0; i < sizeof(files) / sizeof(files[0]); i++) { if (!write_file(files[i].name, files[i].data)) { } } kill(cad_pid, SIGKILL); while (waitpid(cad_pid, NULL, 0) != cad_pid) ; } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void execute_one(void) { if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } int i, call, thread; for (call = 0; call < 9; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); event_timedwait(&th->done, 50 + (call == 0 ? 4000 : 0) + (call == 7 ? 4000 : 0)); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); close_fds(); } static void execute_one(void); #define WAIT_FLAGS __WALL static void loop(void) { setup_loop(); int iter = 0; for (;; iter++) { char cwdbuf[32]; sprintf(cwdbuf, "./%d", iter); if (mkdir(cwdbuf, 0777)) exit(1); reset_loop(); int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { if (chdir(cwdbuf)) exit(1); setup_test(); execute_one(); exit(0); } int status = 0; uint64_t start = current_time_ms(); for (;;) { sleep_ms(10); if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } remove_dir(cwdbuf); } } uint64_t r[1] = {0xffffffffffffffff}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: NONFAILING(memcpy((void*)0x20000040, "ext4\000", 5)); NONFAILING(memcpy((void*)0x200001c0, "./file2\000", 8)); NONFAILING(memcpy((void*)0x20000200, "nogrpid", 7)); NONFAILING(*(uint8_t*)0x20000207 = 0x2c); NONFAILING(memcpy((void*)0x20000208, "resuid", 6)); NONFAILING(*(uint8_t*)0x2000020e = 0x3d); NONFAILING(sprintf((char*)0x2000020f, "0x%016llx", (long long)0xee01)); NONFAILING(*(uint8_t*)0x20000221 = 0x2c); NONFAILING(memcpy((void*)0x20000222, "debug_want_extra_isize", 22)); NONFAILING(*(uint8_t*)0x20000238 = 0x3d); NONFAILING(sprintf((char*)0x20000239, "0x%016llx", (long long)0x68)); NONFAILING(*(uint8_t*)0x2000024b = 0x2c); NONFAILING(memcpy((void*)0x2000024c, "debug", 5)); NONFAILING(*(uint8_t*)0x20000251 = 0x2c); NONFAILING(memcpy((void*)0x20000252, "nombcache", 9)); NONFAILING(*(uint8_t*)0x2000025b = 0x2c); NONFAILING(memcpy((void*)0x2000025c, "quota", 5)); NONFAILING(*(uint8_t*)0x20000261 = 0x2c); NONFAILING(*(uint8_t*)0x20000262 = 0); NONFAILING(memcpy( (void*)0x20000940, "\x78\x9c\xec\xdb\xcf\x6b\x1c\x55\x1c\x00\xf0\xef\xcc\x26\xad\xfd\x65" "\x62\xa9\x3f\x9a\x56\x8d\x56\x31\xf8\x23\x69\xd2\x5a\x7b\xf0\xa2\x28" "\x78\x50\x10\xf4\x50\x8f\x31\x49\x4b\xec\xb6\x91\x26\x82\x2d\x41\xa3" "\x48\x3d\x4a\xc1\xbb\x78\x14\xfc\x0b\x3c\xe9\x45\xd4\x93\xe0\x55\xef" "\x52\x28\x92\x4b\xab\xa7\x95\xd9\x9d\x49\x76\x37\xbb\x69\x92\x6e\xb2" "\xd5\xfd\x7c\x60\x92\xf7\x66\xde\xf2\xde\x77\x67\xde\xee\x7b\xf3\x76" "\x02\xe8\x59\xc3\xd9\x9f\x24\x62\x7f\x44\xfc\x1e\x11\x03\xb5\x6c\x63" "\x81\xe1\xda\xbf\x5b\xcb\x8b\x53\x7f\x2f\x2f\x4e\x25\x51\xa9\xbc\xf5" "\x57\x52\x2d\x77\x73\x79\x71\xaa\x28\x5a\xbc\x6e\x5f\x91\xe9\x8b\x48" "\x3f\x4b\xe2\x48\x8b\x7a\xe7\x2f\x5f\x39\x3f\x59\x2e\xcf\x5c\xca\xf3" "\x63\x0b\x17\xde\x1f\x9b\xbf\x7c\xe5\xb9\xd9\x0b\x93\xe7\x66\xce\xcd" "\x5c\x9c\x38\x7d\xfa\xe4\x89\xf1\x17\x4e\x4d\x3c\xdf\x91\x38\xb3\xb8" "\x6e\x0e\x7d\x34\x77\xf4\xf0\x6b\xef\x5c\x7b\x63\xea\xcc\xb5\x77\x7f" "\xfe\x36\x29\xe2\x6f\x8a\xa3\x43\x86\xd7\x3b\xf8\x64\xa5\xd2\xe1\xea" "\xba\xeb\x40\x5d\x3a\xe9\xeb\x62\x43\xd8\x94\x52\xad\x9b\x46\x7f\xb5" "\xff\x0f\x44\x29\x56\x4f\xde\x40\xbc\xfa\x69\x57\x1b\x07\x6c\xab\x4a" "\xa5\x52\x79\xa0\xfd\xe1\xa5\x0a\xf0\x3f\x96\x44\xb7\x5b\x00\x74\x47" "\xf1\x45\x9f\xcd\x7f\x8b\x6d\x87\x86\x1e\x77\x85\x1b\x2f\xd5\x26\x40" "\x59\xdc\xb7\xf2\xad\x76\xa4\x2f\xd2\xbc\x4c\x7f\xd3\xfc\xb6\x93\x86" "\x23\xe2\xcc\xd2\x3f\x5f\x65\x5b\x6c\xcf\x7d\x08\x00\x80\x06\xdf\x67" "\xe3\x9f\x67\x5b\x8d\xff\xd2\xa8\xbf\x2f\x74\x6f\xbe\x86\x32\x18\x11" "\xf7\x45\xc4\xc1\x88\x38\x15\x11\x87\x22\xe2\xfe\x88\x6a\xd9\x07\x23" "\xe2\xa1\x4d\xd6\xdf\xbc\x48\xb2\x76\xfc\x93\x5e\xdf\x52\x60\x1b\x94" "\x8d\xff\x5e\xcc\xd7\xb6\x1a\xc7\x7f\xc5\xe8\x2f\x06\x4b\x79\xee\x40" "\x35\xfe\xfe\xe4\xec\x6c\x79\xe6\x78\xfe\x9e\x8c\x44\xff\xee\x2c\x3f" "\xbe\x4e\x1d\x3f\xbc\xf2\xdb\x17\xed\x8e\xd5\x8f\xff\xb2\x2d\xab\xbf" "\x18\x0b\xe6\xed\xb8\xde\xb7\xbb\xf1\x35\xd3\x93\x0b\x93\x77\x12\x73" "\xbd\x1b\x9f\x44\x0c\xf5\xb5\x8a\x3f\x59\x59\x09\x48\x22\xe2\x70\x44" "\x0c\x6d\xb1\x8e\xd9\xa7\xbf\x39\xda\xee\xd8\xed\xe3\x5f\x47\x07\xd6" "\x99\x2a\x5f\x47\x3c\x55\x3b\xff\x4b\xd1\x14\x7f\x21\x59\x7f\x7d\x72" "\xec\x9e\x28\xcf\x1c\x1f\x2b\xae\x8a\xb5\x7e\xf9\xf5\xea\x9b\xed\xea" "\xbf\xa3\xf8\x3b\x20\x3b\xff\x7b\x5b\x5e\xff\x2b\xf1\x0f\x26\xf5\xeb" "\xb5\xf3\x9b\xaf\xe3\xea\x1f\x9f\xb7\x9d\xd3\x6c\xf5\xfa\xdf\x95\xbc" "\xdd\xb0\xef\xc3\xc9\x85\x85\x4b\xe3\x11\xbb\x92\xd7\x6b\x8d\xae\xdf" "\x3f\xd1\x54\x6e\x62\xb5\x7c\x16\xff\xc8\xb1\xd6\xfd\xff\x60\xac\xbe" "\x13\x47\x22\x22\xbb\x88\x1f\x8e\x88\x47\x22\xe2\xd1\xbc\xed\x8f\x45" "\xc4\xe3\x11\x71\x6c\x9d\xf8\x7f\x7a\xf9\x89\xf7\xb6\x1e\xff\xf6\xca" "\xe2\x9f\xde\xd4\xf9\x5f\x4d\xec\x8a\xe6\x3d\xad\x13\xa5\xf3\x3f\x7e" "\xd7\x50\xe9\xe0\x66\xe2\xcf\xce\xff\xc9\x6a\x6a\x24\xdf\xb3\x91\xcf" "\xbf\x8d\xb4\x6b\x6b\x57\x33\x00\x00\x00\xfc\xf7\xa4\x11\xb1\x3f\x92" "\x74\x74\x25\x9d\xa6\xa3\xa3\xb5\xdf\xf0\x1f\x8a\xbd\x69\x79\x6e\x7e" "\xe1\x99\xb3\x73\x1f\x5c\x9c\xae\x3d\x23\x30\x18\xfd\x69\x71\xa7\x6b" "\xa0\xee\x7e\xe8\x78\x3e\xad\x2f\xf2\x13\x4d\xf9\x13\xf9\x7d\xe3\x2f" "\x4b\x7b\xaa\xf9\xd1\xa9\xb9\xf2\x74\xb7\x83\x87\x1e\xb7\xaf\x4d\xff" "\xcf\xfc\x59\xea\x76\xeb\x80\x6d\xe7\x79\x2d\xe8\x5d\xfa\x3f\xf4\x2e" "\xfd\x1f\x7a\x97\xfe\x0f\xbd\xab\x45\xff\xdf\xd3\x8d\x76\x00\x3b\xaf" "\xd5\xf7\xff\xc7\x5d\x68\x07\xb0\xf3\x9a\xfa\xbf\x65\x3f\xe8\x21\xe6" "\xff\xd0\xbb\xf4\x7f\xe8\x5d\xfa\x3f\xf4\xa4\xf9\x3d\x71\xfb\x87\xe4" "\x25\x24\xd6\x24\x22\xbd\x2b\x9a\x21\xb1\x4d\x89\x6e\x7f\x32\x01\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x74\xc6\xbf\x01\x00\x00\xff\xff\x50\x38\xe6\xd5", 1071)); NONFAILING(syz_mount_image(/*fs=*/0x20000040, /*dir=*/0x200001c0, /*flags=MS_NODEV|MS_NOATIME*/ 0x404, /*opts=*/0x20000200, /*chdir=*/3, /*size=*/0x42f, /*img=*/0x20000940)); break; case 1: NONFAILING(memcpy((void*)0x20000000, "./file0\000", 8)); syscall(__NR_chdir, /*dir=*/0x20000000ul); break; case 2: NONFAILING(memcpy((void*)0x20000040, "./bus\000", 6)); syscall(__NR_creat, /*file=*/0x20000040ul, /*mode=*/0ul); break; case 3: NONFAILING(memcpy((void*)0x20000040, "hugetlb.2MB.usage_in_bytes\000", 27)); syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000040ul, /*flags=*/0x275a, /*mode=*/0); break; case 4: NONFAILING(memcpy((void*)0x20000380, "/dev/loop", 9)); NONFAILING(*(uint8_t*)0x20000389 = 0x30 + procid * 1); NONFAILING(*(uint8_t*)0x2000038a = 0); NONFAILING(memcpy((void*)0x20000140, "./bus\000", 6)); syscall(__NR_mount, /*src=*/0x20000380ul, /*dst=*/0x20000140ul, /*type=*/0ul, /*flags=MS_BIND*/ 0x1000ul, /*data=*/0ul); break; case 5: NONFAILING(memcpy((void*)0x200002c0, "./bus\000", 6)); res = syscall(__NR_open, /*file=*/0x200002c0ul, /*flags=O_SYNC|O_DIRECT|O_RDWR*/ 0x105002ul, /*mode=*/0ul); if (res != -1) r[0] = res; break; case 6: syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x800000ul, /*prot=PROT_WRITE*/ 2ul, /*flags=MAP_STACK|MAP_POPULATE|MAP_FIXED|MAP_SHARED*/ 0x28011ul, /*fd=*/r[0], /*offset=*/0ul); break; case 7: NONFAILING(memcpy((void*)0x20000040, "exfat\000", 6)); NONFAILING(memcpy((void*)0x20000180, "\351\037q\211Y\036\2223aK\000", 11)); NONFAILING(*(uint8_t*)0x200003c0 = -1); NONFAILING(*(uint8_t*)0x200003c1 = -1); NONFAILING(sprintf((char*)0x200003c2, "0x%016llx", (long long)-1)); NONFAILING(*(uint64_t*)0x200003d4 = -1); NONFAILING(*(uint8_t*)0x200003dc = -1); NONFAILING(sprintf((char*)0x200003dd, "%020llu", (long long)0)); NONFAILING(memcpy( (void*)0x20001b00, "\x78\x9c\xec\xdc\x0b\xb8\x4e\xd5\xf6\x30\xf0\x31\xe6\x9c\x8b\x4d\xd2" "\x9b\xe4\x3e\xc7\x1c\x8b\x37\x6d\x4c\x97\x24\xb9\x24\xc9\x25\x49\x92" "\x23\x49\x6e\x09\x21\x49\x92\x90\xdc\x6f\x49\x48\x42\xee\x49\xee\x21" "\xb9\x85\xe4\x7e\xbf\xe5\x9e\x24\x49\x92\x24\x24\x24\x99\xdf\xe3\x9c" "\xce\xd7\x39\xa7\xf3\xff\xf7\xf5\xff\xf7\x7d\x9e\xef\xbf\xc7\xef\x79" "\xd6\xf3\xce\xf1\xae\x77\xcc\x35\xe6\x1e\x7b\xef\x77\xad\xb5\x9f\x77" "\x7f\xd3\x61\x48\xe5\xba\x55\x2a\xd4\x66\x66\xf8\x6f\xc1\xbf\x3d\x74" "\x07\x80\x14\x00\xe8\x0f\x00\xd7\x01\x40\x04\x00\x25\xb2\x94\xc8\x72" "\x65\x7f\x06\x8d\xdd\xff\x7b\x07\x11\x7f\xae\x87\xa6\x5f\xed\x0a\xc4" "\xd5\x24\xfd\x4f\xdb\xa4\xff\x69\x9b\xf4\x3f\x6d\x93\xfe\xa7\x6d\xd2" "\xff\xb4\x4d\xfa\x9f\xb6\x49\xff\xd3\x36\xe9\xbf\x10\x69\xd9\xf6\x19" "\x39\xaf\x97\x2d\xed\x6e\x72\xff\x3f\x2d\x93\xf7\xff\xff\x41\x8e\x16" "\x1e\xfb\xc5\xc6\xc2\x37\x76\xfc\x03\x29\xd2\xff\xb4\x4d\xfa\x9f\xb6" "\x49\xff\xd3\x36\xe9\x7f\xda\x26\xfd\x4f\xdb\xa4\xff\x69\x9b\xf4\x3f" "\x6d\x93\xfe\x0b\x91\x96\xfd\xd7\xef\x1d\xcb\xdf\x0e\xfe\x27\x6c\x57" "\xfb\xfb\x4f\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10" "\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08" "\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84" "\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42" "\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21" "\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10" "\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08" "\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x44\xda\x70\x21\xfc\xca" "\x00\xc0\xdf\xc7\x57\xbb\x2e\x21\x84\x10\x42\x08\x21\x84\x10\x42\xfc" "\x79\x42\xfa\xab\x5d\x81\x10\x42\x08\x21\x84\x10\x42\x08\x21\xfe\xef" "\x43\x50\xa0\xc1\x40\x04\xe9\x20\x3d\xa4\x40\x06\xc8\x08\xd7\x40\x26" "\xb8\x16\x32\xc3\x75\x90\x80\xeb\x21\x0b\xdc\x00\x59\xe1\x46\xc8\x06" "\xd9\x21\x07\xe4\x84\x5c\x90\x1b\xf2\x80\x05\x02\x07\x0c\x31\xe4\x85" "\x7c\x90\x84\x9b\x20\x3f\xdc\x0c\xa9\x50\x00\x0a\x42\x21\xf0\x50\x18" "\x8a\x40\x51\x28\x06\xb7\x40\x71\xb8\x15\x4a\xc0\x6d\x50\x12\x6e\x87" "\x52\x50\x1a\xca\x40\x59\xb8\x03\xca\xc1\x9d\x50\x1e\xee\x82\x0a\x70" "\x37\x54\x84\x4a\x50\x19\xaa\xc0\x3d\x50\x15\xee\x85\x6a\x70\x1f\x54" "\x87\xfb\xa1\x06\x3c\x00\x35\xe1\x41\xa8\x05\x7f\x81\xda\xf0\x10\xd4" "\x81\x87\xa1\x2e\x3c\x02\xf5\xe0\x51\xa8\x0f\x0d\xa0\x21\x34\x82\xc6" "\xff\xa5\xfc\x17\xa0\x0b\xbc\x08\x5d\xa1\x1b\x74\x87\x1e\xd0\x13\x7a" "\x41\x6f\xe8\x03\x7d\xa1\x1f\xf4\x87\x97\x60\x00\xbc\x0c\x03\xe1\x15" "\x18\x04\x83\x61\x08\xbc\x0a\x43\xe1\x35\x18\x06\xaf\xc3\x70\x18\x01" "\x23\xe1\x0d\x18\x05\xa3\x61\x0c\x8c\x85\x71\x30\x1e\x26\xc0\x9b\x30" "\x11\xde\x82\x49\xf0\x36\x4c\x86\x29\x30\x15\xa6\xc1\x74\x98\x01\x33" "\xe1\x1d\x98\x05\xb3\x61\x0e\xbc\x0b\x73\xe1\x3d\x98\x07\xf3\x61\x01" "\x2c\x84\x45\xf0\x3e\x2c\x86\x25\xb0\x14\x3e\x80\x65\xf0\x21\x2c\x87" "\x15\xb0\x12\x56\xc1\x6a\x58\x03\x6b\x61\x1d\xac\x87\x0d\xb0\x11\x36" "\xc1\x66\xd8\x02\x5b\x61\x1b\x6c\x87\x8f\x60\x07\xec\x84\x5d\xb0\x1b" "\xf6\xc0\x5e\xd8\x07\x1f\xc3\x7e\xf8\x04\x0e\xc0\xa7\x70\x10\x3e\xfb" "\x83\xf9\xe7\xff\x25\xbf\x23\x02\x02\x2a\x54\x68\xd0\x60\x3a\x4c\x87" "\x29\x98\x82\x19\x31\x23\x66\xc2\x4c\x98\x19\x33\x63\x02\x13\x98\x05" "\xb3\x60\x56\xcc\x8a\xd9\x30\x1b\xe6\xc0\x1c\x98\x0b\x73\x61\x1e\xcc" "\x83\x84\x84\x8c\x8c\x79\x31\x2f\x26\x31\x89\xf9\x31\x3f\xa6\x62\x2a" "\x16\xc4\x82\xe8\xd1\x63\x11\x2c\x82\xc5\xf0\x16\x2c\x8e\xc5\xb1\x04" "\x96\xc0\x92\x58\x12\x4b\x61\x69\x2c\x8d\x65\xb1\x2c\x96\xc3\x72\x58" "\x1e\xcb\x63\x05\xac\x80\x15\xb1\x22\x56\xc6\xca\x78\x0f\xde\x83\xf7" "\x62\x35\xac\x86\xd5\xb1\x3a\xd6\xc0\x1a\x58\x13\x6b\x62\x2d\xac\x85" "\xb5\xb1\x36\xd6\xc1\x3a\x58\x17\xeb\x62\x3d\xac\x87\xf5\xb1\x3e\x36" "\xc4\x86\xd8\x18\x1b\x63\x13\x6c\x82\x4d\xb1\x29\x36\xc7\xe6\xd8\x02" "\x5b\x60\x2b\x6c\x85\xad\xb1\x35\xb6\xc1\x36\xd8\x16\xdb\x62\x3b\x6c" "\x87\xed\xb1\x3d\x76\xc0\x0e\xd8\x11\x3b\x61\x27\x7c\x01\x5f\xc0\x17" "\xf1\x45\xec\x86\x15\x55\x0f\xec\x89\x3d\xb1\x37\xf6\xc6\xbe\xd8\x0f" "\xfb\xe1\x4b\x38\x00\x5f\xc6\x97\xf1\x15\x1c\x84\x83\x71\x08\xbe\x8a" "\xaf\xe2\x6b\x38\x0c\xcf\xe1\x70\x1c\x81\x23\x71\x24\x96\x53\xa3\x71" "\x0c\x8e\x45\x56\xe3\x71\x02\x4e\xc0\x89\x38\x11\x27\xe1\x24\x9c\x8c" "\x53\x70\x0a\x4e\xc3\xe9\x38\x03\x67\xe2\x4c\x9c\x85\xb3\x71\x36\xbe" "\x8b\x73\xf1\x3d\x7c\x0f\xe7\xe3\x7c\x5c\x88\x8b\x70\x11\x2e\xc6\x25" "\xb8\x14\x97\xe2\x32\x3c\x8f\xcb\x71\x05\xae\xc4\x55\xb8\x1a\xd7\xe0" "\x6a\x5c\x87\xeb\x71\x1d\x6e\xc4\x4d\xb8\x11\xb7\xe0\x16\xdc\x86\xdb" "\xf0\x23\xfc\x08\x77\xe2\x4e\xdc\x8d\xbb\x71\x2f\x1a\x00\xfc\x18\x3f" "\xc1\x4f\x70\x10\x1e\xc4\x83\x78\x08\x0f\xe1\x61\x3c\x8c\x47\xf0\x08" "\x1e\xc5\xa3\x78\x0c\x8f\xe1\x71\x3c\x8e\x27\xf0\x04\x9e\xc4\x93\x78" "\x0a\x4f\xe3\x19\x3c\x8d\x67\xf1\x2c\x9e\xc3\xf3\x78\x01\x2f\xe0\x45" "\xbc\x88\x97\xf0\xb9\x5c\x5f\xd5\xd9\x5b\x60\xc3\x20\x50\x57\x18\x65" "\x54\x3a\x95\x4e\xa5\xa8\x14\x95\x51\x65\x54\x99\x54\x26\x95\x59\x65" "\x56\x09\x95\x50\x59\x54\x16\x95\x55\x65\x55\xd9\x54\x36\x95\x43\xe5" "\x50\xb9\x54\x2e\x95\x47\xe5\x51\xa4\x48\xb1\x8a\x55\x5e\x95\x57\x25" "\x55\x52\xe5\x57\xf9\x55\xaa\x4a\x55\x05\x55\x41\xe5\x95\x57\x45\x54" "\x11\x55\x4c\x15\x53\xc5\x55\x71\x55\x42\xdd\xa6\x4a\xaa\xdb\x55\x29" "\x55\x5a\x35\xf3\x65\x55\x59\x55\x4e\x35\xf7\xe5\xd5\x5d\xaa\x82\xaa" "\xa0\x2a\xaa\x4a\xaa\xb2\xaa\xa2\xaa\xa8\xaa\xaa\xaa\xaa\xa6\xaa\xa9" "\xea\xaa\xba\xaa\xa1\x6a\xa8\x9a\xea\x41\x55\x4b\xf5\xc0\xbe\xf8\x90" "\xba\xd2\x99\xba\x6a\x30\xd6\x53\x43\xb0\xbe\x6a\xa0\x1a\xaa\x46\xea" "\x35\x7c\x4c\x35\x51\xc3\xb0\xa9\x6a\xa6\x9a\xab\x27\xd4\x08\x1c\x8e" "\xad\x54\x13\xdf\x5a\x3d\xa5\xda\xa8\x31\xd8\x56\x3d\xa3\xc6\xe2\xb3" "\xaa\xbd\x1a\x8f\x1d\xd4\xf3\xaa\xa3\xea\xa4\x3a\xab\x17\x54\x17\xd5" "\xd4\x77\x55\xdd\xd4\x64\xec\xa1\x7a\xaa\x69\xd8\x5b\xf5\x51\x7d\x55" "\x3f\x35\x0b\x2b\xa9\x2b\x1d\xab\xac\x5e\x51\x83\xd4\x60\x35\x44\xbd" "\xaa\x16\xe2\x6b\x6a\x98\x7a\x5d\x0d\x57\x23\xd4\x48\xf5\x86\x1a\xa5" "\x46\xab\x31\x6a\xac\x1a\xa7\xc6\xab\x09\xea\x4d\x35\x51\xbd\xa5\x26" "\xa9\xb7\xd5\x64\x35\x45\x4d\x55\xd3\xd4\x74\x35\x43\xcd\x54\xef\xa8" "\x59\x6a\xb6\x9a\xa3\xde\x55\x73\xd5\x7b\x6a\x9e\x9a\xaf\x16\xa8\x85" "\x6a\x91\x7a\x5f\x2d\x56\x4b\xd4\x52\xf5\x81\x5a\xa6\x3e\x54\xcb\xd5" "\x0a\xb5\x52\xad\x52\xab\xd5\x1a\xb5\x56\xad\x53\xeb\xd5\x06\xb5\x51" "\x6d\x52\x9b\xd5\x16\xb5\x55\x6d\x53\xdb\xd5\x47\x6a\x87\xda\xa9\x76" "\xa9\xdd\x6a\x8f\xda\xab\xf6\xa9\x8f\xd5\x7e\xf5\x89\x3a\xa0\x3e\x55" "\x07\xd5\x67\xea\x90\xfa\x5c\x1d\x56\x5f\xa8\x23\xea\x4b\x75\x54\x7d" "\xa5\x8e\xa9\xaf\xd5\x71\xf5\x8d\x3a\xa1\xbe\x55\x27\xd5\x77\xea\x94" "\x3a\xad\xce\xa8\xef\xd5\x59\xf5\x83\x3a\xa7\xce\xab\x0b\xea\x47\x75" "\x51\xfd\xa4\x2e\xa9\x9f\xd5\x65\x15\x14\x68\xd4\x4a\x6b\x6d\x74\xa4" "\xd3\xe9\xf4\x3a\x45\x67\xd0\x19\xf5\x35\x3a\x93\xbe\x56\x67\xd6\xd7" "\xe9\x84\xbe\x5e\x67\xd1\x37\xe8\xac\xfa\x46\x9d\x4d\x67\xd7\x39\x74" "\x4e\x9d\x4b\xe7\xd6\x79\xb4\xd5\xa4\x9d\x66\x1d\xeb\xbc\x3a\x9f\x4e" 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"\xcf\xe7\x93\xfe\x26\x9f\xdf\xdf\xec\x53\x7d\x01\x5f\xd0\x17\xf2\xde" "\x17\xf6\x45\x7c\x23\xdf\xd8\x37\xf6\x4d\xfc\xe3\xbe\xa9\x6f\xe6\x9b" "\xfb\x27\xfc\x13\xbe\xa5\x6f\xe9\x9f\xf4\x4f\xfa\xa7\x7c\x1b\xff\xb4" "\x6f\xeb\x9f\xf1\xed\xfc\xb3\xbe\xbd\x7f\xce\x3f\xe7\x9f\xf7\x1d\x7d" "\x27\xdf\xd9\xbf\xe0\xbb\xf8\x17\x7d\x57\xdf\xcd\x77\xf7\xdd\x7d\x4f" "\xdf\xd3\xf7\xf6\xbd\x7d\x5f\xdf\xd7\xf7\xf7\xfd\xfd\x00\x3f\xc0\x0f" "\xf4\x03\xfd\x20\x3f\xc8\x0f\xf1\x43\xfc\x50\x3f\xd4\x0f\xf3\xc3\xfc" "\x70\x3f\xdc\x8f\xf4\x23\xfd\x28\x3f\xca\x8f\xf1\x63\xfc\x38\x3f\xce" "\x4f\xf0\x13\xfc\x44\x3f\xd1\x4f\xf2\x93\x7c\x04\x00\x53\xfd\x54\x3f" "\xdd\x4f\xf7\x33\xfd\x4c\x3f\xcb\xcf\xf2\x73\xfc\x1c\x3f\x37\x75\xae" "\x9f\xe7\xe7\xf9\x05\x7e\x81\x5f\xe4\x17\xf9\xc5\x7e\xb1\x5f\xea\x97" "\xfa\x65\x7e\x99\x5f\xee\x97\xfb\x95\x7e\xa5\x5f\xed\x57\xfb\xb5\x7e" "\xad\x5f\xef\xd7\xfb\x8d\x7e\xa3\xdf\xec\x37\xfb\xad\x7e\xab\xdf\xee" "\xb7\xfb\x1d\x7e\x87\xdf\xe5\x77\xf9\x3d\x7e\x8f\xdf\xe7\xf7\xf9\xfd" "\x7e\xbf\x3f\xe0\x0f\xf8\x83\xfe\xa0\x3f\xe4\x0f\xf9\xc3\xfe\xb0\x3f" "\xe2\xbf\xf4\x47\xfd\x57\xfe\x98\xff\xda\x1f\xf7\xdf\xf8\x13\xfe\x5b" "\x7f\xd2\x7f\xe7\x4f\xf9\xd3\xfe\x8c\xff\xde\x9f\xf5\x3f\xf8\x73\xfe" "\xbc\xbf\xe0\x7f\xf4\x17\xfd\x4f\xfe\x92\xff\xd9\x5f\xf6\xc1\x4f\x48" "\xbc\x99\x98\x98\x78\x2b\x31\x29\xf1\x76\x62\x72\x62\x4a\x62\x6a\x62" "\x5a\x62\x7a\x62\x46\x62\x66\xe2\x9d\xc4\xac\xc4\xec\xc4\x9c\xc4\xbb" "\x89\xb9\x89\xf7\x12\xf3\x12\xf3\x13\x0b\x12\x0b\x13\x8b\x12\xef\x27" "\x16\x27\x96\x24\x96\x26\x3e\x48\x2c\x4b\x7c\x98\x58\x9e\x58\x91\x58" "\x99\x58\x95\x58\x9d\x58\x63\x20\xe4\xde\x11\x87\xbc\x21\x5f\x48\x86" "\x9b\x42\xfe\x70\x73\x48\x0d\x05\x42\xc1\x50\x28\xf8\x50\x38\x14\x09" "\x45\x43\xb1\x70\x4b\x28\x1e\x6e\x0d\x25\xc2\x6d\xa1\x64\xb8\x3d\x94" "\x0a\xa5\x43\x99\xf0\x68\xa8\x1f\x1a\x84\x86\xa1\x51\x68\x1c\x1e\x0b" "\x4d\xc2\xe3\xa1\x69\x68\x16\x9a\x87\x27\x42\x8b\xd0\x32\xb4\x0a\x4f" "\x86\xd6\xe1\xa9\xd0\x26\x3c\x1d\xda\x86\x67\x42\xbb\xf0\x6c\x68\x1f" "\x9e\x0b\x1d\xc2\xf3\xa1\x63\xe8\x14\x3a\x87\x17\x42\x97\xf0\x62\xe8" "\x1a\xba\x85\xee\xa1\x47\xe8\x19\x7a\x85\xde\xa1\x4f\xe8\x1b\xfa\x85" "\xfe\xe1\xa5\x30\x20\xbc\x1c\x06\x86\x57\xc2\xa0\x30\x38\x0c\x09\xaf" "\x86\xa1\xe1\xb5\x30\x2c\xbc\x1e\x86\x87\x11\x61\x64\x78\x23\x8c\x0a" "\xa3\xc3\x98\x30\x36\x8c\x0b\xe3\xc3\x84\xf0\x66\x98\x18\xde\x0a\x93" "\xc2\xdb\x61\x72\x98\x12\xa6\x86\x69\x61\x7a\x98\x11\x66\x86\x77\xc2" "\xac\x30\x3b\xcc\x09\xef\x86\xb9\xe1\xbd\x30\x2f\xcc\x0f\x0b\xc2\xc2" "\xb0\x28\xbc\x1f\x16\x87\x25\x61\x69\xf8\x20\x2c\x0b\x1f\x86\xe5\x61" "\x45\x58\x19\x56\x85\xd5\x61\x4d\x58\x1b\xd6\x85\xf5\x61\x43\xd8\x18" "\x36\x85\xcd\x61\x4b\xd8\x1a\xb6\x85\xed\xe1\xa3\xb0\x23\xec\x0c\xbb" "\xc2\xee\xb0\x27\xec\x0d\xfb\xc2\xc7\x61\x7f\xf8\x24\x1c\x08\x9f\x86" "\x83\xe1\xb3\x70\x28\x7c\x1e\x0e\x87\x2f\xc2\x91\xf0\x65\x38\x1a\xbe" "\x0a\xc7\xc2\xd7\xe1\x78\xf8\x26\x9c\x08\xdf\x86\x93\xe1\xbb\x70\x2a" "\x9c\x0e\x67\xc2\xf7\xe1\x6c\xf8\x21\x9c\x0b\xe7\xc3\x85\xf0\x63\xb8" "\x18\x7e\x0a\x97\xc2\xcf\xe1\xf2\x1f\xfc\xcc\x5a\xa5\x3f\xf3\x16\xba" "\x10\x42\x08\x21\xc4\xff\x47\x7a\xfd\xce\xfe\x1e\xff\xe6\x39\x03\x00" "\xea\x97\xf1\x4f\x21\x84\x6b\x77\xe6\x3c\xfa\x8f\xfb\x35\x00\x6c\xce" "\xf6\xb7\x71\x1f\x95\xab\x45\x02\x00\x9e\xea\xd6\xe1\xa1\xbf\x6f\x15" "\x2b\x76\xef\xde\xfd\x97\xd7\x2e\xd7\x10\xe5\x9b\x0f\x00\x89\x7f\x39" "\xc0\x2f\xf1\x0a\x68\x0e\x2d\xa1\x35\x34\x83\x62\xff\xb6\xbe\x3e\xaa" "\xd3\x45\xfe\x9d\xf9\x93\xb7\x01\x64\xfc\x87\x9c\x14\xf8\x35\xfe\x75" "\xfe\xcf\xff\x83\xf9\x1f\x7b\x62\xe4\xe2\x92\xf1\x85\x2c\xff\xc9\xfc" "\xf3\x01\x52\xf3\xfd\x9a\x73\xe5\x2a\xfc\xef\xf1\x0a\x68\x7e\x65\x35" "\xd0\x0c\x8a\xff\x07\xf3\x67\x6f\xf2\x3b\xf5\x67\xf8\x62\x02\x40\xd3" "\x7f\xc8\xc9\x04\x00\x4d\x33\xfc\x6b\xfd\x45\xe0\x71\x78\x1a\x5a\xff" "\xd3\x2b\x85\x10\x42\x08\x21\x84\x10\x42\x88\xbf\xe9\xa3\xca\xb4\xfb" "\xbd\xeb\xe7\x2b\xd7\xe7\xb9\xcc\xaf\x39\xe9\xe1\xd7\xf8\xf7\xae\xcf" "\x85\x10\x42\x08\x21\x84\x10\x42\x08\x71\xf5\x3d\xdb\xa9\xf3\x93\x8f" "\xb5\x6e\xdd\xac\x9d\x0c\x64\x20\x83\x34\x36\x68\xf9\x9f\xbc\xe6\x6a" "\xff\x66\x12\x42\x08\x21\x84\x10\x42\xfc\xd9\x7e\x3d\xe9\xff\xf5\xb9" "\x0c\x57\xb3\x20\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10" "\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08" "\x21\x84\x10\x42\x08\x21\x84\x10\x22\x0d\xfa\x7f\xf1\x9f\xc6\xae\xf6" "\x1a\x85\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84" "\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42" "\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x88\xab" "\xed\x7f\x05\x00\x00\xff\xff\x0f\x98\x37\x7d", 5383)); NONFAILING(syz_mount_image( /*fs=*/0x20000040, /*dir=*/0x20000180, /*flags=MS_I_VERSION|MS_POSIXACL|MS_RELATIME|MS_NOSUID|MS_NOEXEC*/ 0xa1000a, /*opts=*/0x200003c0, /*chdir=*/0x21, /*size=*/0x1507, /*img=*/0x20001b00)); break; case 8: NONFAILING(memcpy((void*)0x20000000, "./file0\000", 8)); syscall(__NR_mknod, /*file=*/0x20000000ul, /*mode=*/0ul, /*dev=*/0x701 + procid * 2); break; } } int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); setup_sysctl(); setup_cgroups(); const char* reason; (void)reason; if ((reason = setup_binfmt_misc())) printf("the reproducer may not work as expected: binfmt_misc setup failed: " "%s\n", reason); if ((reason = setup_usb())) printf("the reproducer may not work as expected: USB injection setup " "failed: %s\n", reason); install_segv_handler(); for (procid = 0; procid < 5; procid++) { if (fork() == 0) { use_temporary_dir(); do_sandbox_none(); } } sleep(1000000); return 0; }