// https://syzkaller.appspot.com/bug?id=05431ab282eb8c0a336f2107744c0d05db18c1a4 // 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 #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 void netlink_nest(struct nlmsg* nlmsg, 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(struct nlmsg* nlmsg) { struct nlattr* attr = nlmsg->nested[--nlmsg->nesting]; attr->nla_len = nlmsg->pos - (char*)attr; } 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 unsigned int queue_count = 2; static void netlink_add_device_impl(struct nlmsg* nlmsg, const char* type, const char* name, bool up) { struct ifinfomsg hdr; memset(&hdr, 0, sizeof(hdr)); if (up) hdr.ifi_flags = hdr.ifi_change = IFF_UP; netlink_init(nlmsg, RTM_NEWLINK, NLM_F_EXCL | NLM_F_CREATE, &hdr, sizeof(hdr)); if (name) netlink_attr(nlmsg, IFLA_IFNAME, name, strlen(name)); netlink_attr(nlmsg, IFLA_NUM_TX_QUEUES, &queue_count, sizeof(queue_count)); netlink_attr(nlmsg, IFLA_NUM_RX_QUEUES, &queue_count, sizeof(queue_count)); netlink_nest(nlmsg, IFLA_LINKINFO); netlink_attr(nlmsg, IFLA_INFO_KIND, type, strlen(type)); } 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 struct nlmsg nlmsg; //% 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"); } else if (strncmp(fs, "gfs2", 4) == 0 && (strstr(opts, "errors=panic") || strstr(opts, "debug"))) { strcat(opts, ",errors=withdraw"); } 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; } 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"}, {"/sys/kernel/debug/failslab/task-filter", "Y"}, {"/sys/kernel/debug/fail_page_alloc/task-filter", "Y"}, {"/sys/kernel/debug/fail_futex/task-filter", "Y"}, {"/sys/kernel/debug/fail_usercopy/task-filter", "Y"}, {"/sys/kernel/debug/fail_make_request/task-filter", "Y"}, {"/sys/kernel/debug/fail_io_timeout/task-filter", "Y"}, {"/sys/kernel/debug/fail_iommufd/task-filter", "Y"}, {"/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) ; } #define NL802154_CMD_SET_SHORT_ADDR 11 #define NL802154_ATTR_IFINDEX 3 #define NL802154_ATTR_SHORT_ADDR 10 static const char* setup_802154() { const char* error = NULL; int sock_generic = -1; int sock_route = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE); if (sock_route == -1) { error = "socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE) failed"; goto fail; } sock_generic = socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC); if (sock_generic == -1) { error = "socket(AF_NETLINK, SOCK_RAW, NETLINK_GENERIC) failed"; goto fail; } { int nl802154_family_id = netlink_query_family_id(&nlmsg, sock_generic, "nl802154", true); if (nl802154_family_id < 0) { error = "netlink_query_family_id failed"; goto fail; } for (int i = 0; i < 2; i++) { char devname[] = "wpan0"; devname[strlen(devname) - 1] += i; uint64_t hwaddr = 0xaaaaaaaaaaaa0002 + (i << 8); uint16_t shortaddr = 0xaaa0 + i; int ifindex = if_nametoindex(devname); struct genlmsghdr genlhdr; memset(&genlhdr, 0, sizeof(genlhdr)); genlhdr.cmd = NL802154_CMD_SET_SHORT_ADDR; netlink_init(&nlmsg, nl802154_family_id, 0, &genlhdr, sizeof(genlhdr)); netlink_attr(&nlmsg, NL802154_ATTR_IFINDEX, &ifindex, sizeof(ifindex)); netlink_attr(&nlmsg, NL802154_ATTR_SHORT_ADDR, &shortaddr, sizeof(shortaddr)); if (netlink_send(&nlmsg, sock_generic) < 0) { error = "NL802154_CMD_SET_SHORT_ADDR failed"; goto fail; } netlink_device_change(&nlmsg, sock_route, devname, true, 0, &hwaddr, sizeof(hwaddr), 0); if (i == 0) { netlink_add_device_impl(&nlmsg, "lowpan", "lowpan0", false); netlink_done(&nlmsg); netlink_attr(&nlmsg, IFLA_LINK, &ifindex, sizeof(ifindex)); if (netlink_send(&nlmsg, sock_route) < 0) { error = "netlink: adding device lowpan0 type lowpan link wpan0"; goto fail; } } } } fail: close(sock_route); close(sock_generic); return error; } 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 loop(void) { if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } int i, call, thread; for (call = 0; call < 5; 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)); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); } void execute_call(int call) { switch (call) { case 0: // syz_mount_image$ext4 arguments: [ // fs: ptr[in, buffer] { // buffer: {65 78 74 34 00} (length 0x5) // } // dir: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 33 00} (length 0x8) // } // flags: mount_flags = 0x1010041 (8 bytes) // opts: ptr[in, fs_options[ext4_options]] { // fs_options[ext4_options] { // elems: array[fs_opt_elem[ext4_options]] { // fs_opt_elem[ext4_options] { // elem: union ext4_options { // errors_continue: buffer: {65 72 72 6f 72 73 3d 63 6f 6e 74 // 69 6e 75 65} (length 0xf) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // errors_remount: buffer: {65 72 72 6f 72 73 3d 72 65 6d 6f 75 // 6e 74 2d 72 6f} (length 0x11) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // jqfmt_vfsv1: buffer: {6a 71 66 6d 74 3d 76 66 73 76 31} // (length 0xb) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // grpjquota: buffer: {67 72 70 6a 71 75 6f 74 61 3d} (length // 0xa) // } // comma: const = 0x2c (1 bytes) // } // } // common: array[fs_opt_elem[fs_options_common]] { // } // null: const = 0x0 (1 bytes) // } // } // chdir: int8 = 0x1 (1 bytes) // size: len = 0x546 (8 bytes) // img: ptr[in, buffer] { // buffer: (compressed buffer with length 0x546) // } // ] // returns fd_dir NONFAILING(memcpy((void*)0x200000000080, "ext4\000", 5)); NONFAILING(memcpy((void*)0x200000000040, "./file3\000", 8)); NONFAILING(memcpy((void*)0x200000000000, "errors=continue", 15)); NONFAILING(*(uint8_t*)0x20000000000f = 0x2c); NONFAILING(memcpy((void*)0x200000000010, "errors=remount-ro", 17)); NONFAILING(*(uint8_t*)0x200000000021 = 0x2c); NONFAILING(memcpy((void*)0x200000000022, "jqfmt=vfsv1", 11)); NONFAILING(*(uint8_t*)0x20000000002d = 0x2c); NONFAILING(memcpy((void*)0x20000000002e, "grpjquota=", 10)); NONFAILING(*(uint8_t*)0x200000000038 = 0x2c); NONFAILING(*(uint8_t*)0x200000000039 = 0); NONFAILING(memcpy( (void*)0x200000000180, "\x78\x9c\xec\xdd\xd1\x6b\x64\x57\x19\x00\xf0\xef\xde\x64\x76\xb3\xbb" "\xa9\x99\xaa\x0f\xb5\x60\x2d\xb6\xb2\x5b\x75\x27\x49\xe3\xb6\xc1\x87" "\xaa\x20\xfa\x54\x50\x2b\x3e\x09\x6b\x4c\x26\x21\x64\x92\x59\x92\x49" "\xbb\x09\x8b\x4d\xf1\x55\x10\x44\xb4\xe0\x8b\x3e\xf9\x22\xf8\x07\x08" "\xd2\x17\xdf\x45\x28\xd4\x77\x51\x51\xa4\x66\xf5\x41\xa1\xed\x95\x3b" "\x73\xa7\x9b\x4c\x66\x92\x14\x67\x72\x97\xe4\xf7\x83\xb3\xf7\x9e\x7b" "\x66\xee\xf7\x9d\x09\x73\xe6\xdc\x99\xbb\xf7\x06\x70\x61\x3d\x19\x11" "\x37\x22\x62\x2c\x22\x9e\x89\x88\xa9\x62\x7b\x5a\x94\xd8\xeb\x94\xfc" "\x71\xf7\xf7\xef\x2d\xe6\x25\x89\x2c\x7b\xe9\xed\x24\x92\x62\x5b\x77" "\x5f\x97\x8b\xe5\xb5\xe2\x69\x13\x11\xf1\x8d\xaf\x46\x7c\x37\x39\x1a" "\x77\x6b\x67\x77\x6d\xa1\xd1\xa8\x6f\x16\xf5\xe9\xd6\x7a\xf2\x4e\x96" "\xed\xde\x5c\x5d\x5f\x58\xa9\xaf\xd4\x37\xe6\xe6\x66\x9f\x9b\x7f\x7e" "\xfe\xd6\xfc\xcc\x50\xfa\x59\x8d\x88\x17\xbe\xfc\xd7\x9f\xfc\xf0\x97" "\x5f\x79\xe1\xb7\x9f\x7d\xe5\x4f\xb7\xff\x7e\xe3\x7b\x79\x5a\xff\xcd" "\xb2\x57\xa3\xa7\x1f\xc3\xd4\xe9\x7a\xa5\xfd\x5a\x74\x8d\x47\xc4\xe6" "\x28\x82\x95\x64\xbc\xdd\xc3\x8e\x5b\x25\xe7\x02\x00\xc0\xf1\xf2\xf9" "\xfe\x87\x23\xe2\x93\xed\xf9\xff\x54\x8c\xb5\x67\x73\x00\x00\x00\xc0" "\x79\x92\x7d\x61\x32\xde\x49\x22\x32\x00\x00\x00\xe0\xdc\x4a\x23\x62" "\x32\x92\xb4\x56\x9c\xef\x3b\x59\x9c\xb1\x7a\x2d\x22\x3e\x1a\x57\xd3" "\x46\x73\xab\xf5\x99\xe5\xe6\xf6\xc6\x52\xde\x16\x51\x8d\x4a\xba\xbc" "\xda\xa8\xcf\xc4\x44\xfb\xdc\x81\x6a\x54\x92\xbc\x3e\x5b\x9c\x63\xdb" "\xad\x3f\xdb\x53\x9f\x8b\x88\x47\x23\xe2\xc7\x53\x57\xda\xf5\xda\x62" "\xb3\xb1\x54\xf6\x97\x1f\x00\x00\x00\x70\x41\x5c\xeb\x39\xfe\xff\xf7" "\x54\x9a\xd6\x6a\x45\xe3\x5e\xc9\xc9\x01\x00\x00\x00\xc3\x53\x2d\x3b" "\x01\x00\x00\x00\x60\xe4\x1c\xff\x03\x00\x00\xc0\xf9\x57\xcd\xfa\xdc" "\xa1\xeb\xa8\x74\xf4\x99\x00\x00\x00\x00\x23\xf0\xb5\x17\x5f\xcc\x4b" "\xd6\xbd\xff\xf5\xd2\xcb\x3b\xdb\x6b\xcd\x97\x6f\x2e\xd5\xb7\xd6\x6a" "\xeb\xdb\x8b\xb5\xc5\xe6\xe6\x9d\xda\x4a\xb3\xb9\xd2\xbe\x66\xdf\xfa" "\x49\xfb\x6b\x34\x9b\x77\x3e\x17\x1b\xdb\x77\xa7\x5b\xf5\xad\xd6\xf4" "\xd6\xce\xee\xed\xf5\xe6\xf6\x46\xeb\xf6\xea\xa1\x5b\x60\x03\x00\x00" "\x00\x67\xe8\xd1\x4f\xbc\xf1\xc7\x24\x22\xf6\x3e\x7f\xa5\x5d\x72\x97" "\x8a\xb6\x4a\x44\x36\x76\xf0\xc1\xe3\x65\x64\x08\x8c\xca\x07\x3a\xa7" "\xe7\x2f\xa3\xcb\x03\x38\x7b\x07\x3f\xdf\xaf\x94\x98\x07\x70\xf6\x4c" "\xe9\xe1\xe2\xaa\x94\x9d\x00\x50\xba\x93\xfe\x03\xd0\xc0\x93\x77\x7e" "\x3f\xfc\x5c\x00\x00\x80\xd1\xb8\xfe\xb1\xc1\xbf\xff\xbf\xbd\x5c\x6a" "\x6a\xc0\x88\x15\xbf\xff\x27\xa7\xba\x00\x08\x70\xae\x8c\x95\x9d\x00" "\x50\x9a\xce\xef\x7f\xef\x65\x1d\x65\x67\x03\x9c\xa5\xca\x71\x33\x00" "\x07\x05\x70\xee\xa5\xc3\xf9\xfd\xff\x84\x53\x09\x13\x03\x0a\x00\x00" "\x94\x6c\xb2\x5d\x92\xb4\x56\x1c\x07\x4c\x46\x9a\xd6\x6a\x11\x8f\xb4" "\x6f\x0b\x58\x49\x96\x57\x1b\xf5\x99\x88\xf8\x50\x44\xbc\x35\x55\xb9" "\x9c\xd7\x67\xdb\xcf\x4c\xcc\xe6\x01\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xe0\x94\xb2\x2c\x89\x0c\x00" "\x00\x00\x38\xd7\x22\xd2\xbf\x75\xef\xcc\x75\x7d\xea\xe9\xc9\xde\xef" "\x07\x2e\x25\xff\x99\x6a\x2f\x23\xe2\x95\x9f\xbd\xf4\xd3\xbb\x0b\xad" "\xd6\xe6\x6c\xbe\xfd\x9f\xef\x6f\x6f\xbd\x5e\x6c\x7f\xb6\x8c\x6f\x30" "\x00\x00\x00\x80\x5e\xdd\xe3\xf4\xee\x71\x3c\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\x0c\xd3" "\xfd\xfd\x7b\x8b\xf7\xb3\x2c\xcb\xf6\xef\x2d\x9e\x65\xdc\x7f\x7c\x29" "\x22\xaa\x45\xfc\xa2\x74\x5a\xc6\x63\xa2\xbd\x9c\x88\x4a\x44\x5c\xfd" "\x57\x12\xe3\x07\x9e\x97\x44\xc4\xd8\x10\xe2\xef\xbd\x16\x11\x8f\xf5" "\x8b\x9f\xe4\x69\x45\xb5\xc8\xe2\x50\xfc\x4b\x11\x69\x44\x5c\x19\x56" "\xfc\xf8\x80\xf1\xa3\x13\xff\xda\x10\xe2\xc3\x45\xf6\x46\x3e\xfe\x7c" "\xb1\xdf\xfb\x2f\x8d\x27\xdb\xcb\xfe\xef\xbf\xf1\xa2\xfc\xbf\x06\x8f" "\x7f\xe9\xfb\xe3\xdf\xd8\x80\xf1\xef\x91\x41\x3b\xad\x1c\xae\x3e\xfe" "\xe6\xaf\xa7\x07\xc6\x7f\x2d\xe2\xf1\xf1\xfe\xe3\x4f\x37\x7e\x92\xef" "\xaf\x4f\xfc\xa7\x4e\xd9\xc7\xef\x7c\x73\x77\x77\x50\x5b\xf6\x8b\x88" "\xeb\xfd\xc6\xbf\xe4\x70\xac\xe9\xd6\xfa\x9d\xe9\xad\x9d\xdd\x9b\xab" "\xeb\x0b\x2b\xf5\x95\xfa\xc6\xdc\xdc\xec\x73\xf3\xcf\xcf\xdf\x9a\x9f" "\x99\x5e\x5e\x6d\xd4\x8b\x7f\xfb\xc6\xf8\xd1\xc7\x7f\xf3\xde\x83\xda" "\xbb\x47\xfa\x7f\xf5\x98\xf1\xb7\xdd\xff\x01\xaf\xff\xd3\xa7\xec\xff" "\xbb\x6f\xde\xdd\xff\x48\x67\xb5\xe7\x2f\x13\x95\xf8\x79\x96\xdd\x78" "\xaa\xff\xdf\xff\xb1\x7c\xf1\xe9\xa3\xf1\xbb\x9f\x7d\x9f\x2a\x3e\x07" "\xf2\x7a\xfe\x1a\xa6\xaf\x7f\xab\x6f\xfc\x27\x7e\xf5\x87\x27\x06\xe5" "\x96\xf7\x7f\x69\x40\xff\x27\x7a\xfa\x7f\xb9\xa7\xff\x37\x4e\xd9\xff" "\x67\xbe\xfe\xfd\x3f\x9f\xf2\xa1\x00\xc0\x19\xd8\xda\xd9\x5d\x5b\x68" "\x34\xea\x9b\x56\x0e\xae\x44\xf5\xa1\x48\xe3\xe1\x5d\xc9\xe7\x9d\xa5" "\xa7\x91\x44\x12\xf9\xca\x5b\x87\x9a\x16\xca\x4f\xac\xb3\xf2\x6a\xf1" "\x1e\x5b\x68\x74\xdf\x6d\x43\xda\xf3\xef\x8a\x83\xa3\x51\x26\x5f\xd2" "\x78\x04\x00\x00\x8c\xce\x83\x49\x7f\x6f\x4b\x52\x4e\x42\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x70\x01\x9d\x78\x19" "\xb0\x41\x4d\x69\x44\x3c\xd8\xf2\xed\x1f\x1c\x73\x35\xb2\xde\x98\x7b" "\xe5\x74\x15\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\xe0\x58\xff\x0b\x00" "\x00\xff\xff\x06\x23\xd6\x95", 1350)); NONFAILING(syz_mount_image( /*fs=*/0x200000000080, /*dir=*/0x200000000040, /*flags=MS_POSIXACL|MS_STRICTATIME|MS_RDONLY|MS_MANDLOCK*/ 0x1010041, /*opts=*/0x200000000000, /*chdir=*/1, /*size=*/0x546, /*img=*/0x200000000180)); break; case 1: // mount$overlay arguments: [ // src: const = 0x0 (8 bytes) // dst: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8) // } // type: ptr[in, buffer] { // buffer: {6f 76 65 72 6c 61 79 00} (length 0x8) // } // flags: mount_flags = 0x1004401 (8 bytes) // opts: ptr[in, fs_options[overlay_options]] { // fs_options[overlay_options] { // elems: array[fs_opt_elem[overlay_options]] { // fs_opt_elem[overlay_options] { // elem: union overlay_options { // lowerdir: fs_opt["lowerdir", stringnoz[filename]] { // name: buffer: {6c 6f 77 65 72 64 69 72} (length 0x8) // eq: const = 0x3d (1 bytes) // val: buffer: {2e} (length 0x1) // } // } // comma: const = 0x3a (1 bytes) // } // } // common: array[fs_opt_elem[fs_options_common]] { // } // null: const = 0x2f (1 bytes) // } // } // ] NONFAILING(memcpy((void*)0x200000000140, "./file0\000", 8)); NONFAILING(memcpy((void*)0x200000000180, "overlay\000", 8)); NONFAILING(memcpy((void*)0x2000000011c0, "lowerdir", 8)); NONFAILING(*(uint8_t*)0x2000000011c8 = 0x3d); NONFAILING(memset((void*)0x2000000011c9, 46, 1)); NONFAILING(*(uint8_t*)0x2000000011ca = 0x3a); NONFAILING(*(uint8_t*)0x2000000011cb = 0x2f); syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x200000000140ul, /*type=*/0x200000000180ul, /*flags=MS_REC|MS_STRICTATIME|MS_RDONLY|MS_NOATIME*/ 0x1004401ul, /*opts=*/0x2000000011c0ul); break; case 2: // chdir arguments: [ // dir: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8) // } // ] NONFAILING(memcpy((void*)0x200000000040, "./file0\000", 8)); syscall(__NR_chdir, /*dir=*/0x200000000040ul); break; case 3: // mount$9p_xen arguments: [ // src: nil // dst: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 33 00} (length 0x8) // } // type: nil // flags: mount_flags = 0x32048 (8 bytes) // opts: nil // ] NONFAILING(memcpy((void*)0x200000000100, "./file3\000", 8)); syscall( __NR_mount, /*src=*/0ul, /*dst=*/0x200000000100ul, /*type=*/0ul, /*flags=MS_UNBINDABLE|MS_POSIXACL|MS_NOEXEC|MS_MOVE|0x40*/ 0x32048ul, /*opts=*/0ul); break; case 4: // openat$tun arguments: [ // fd: const = 0xffffffffffffff9c (8 bytes) // file: ptr[in, buffer] { // buffer: {2f 64 65 76 2f 6e 65 74 2f 74 75 6e 00} (length 0xd) // } // flags: open_flags = 0x0 (4 bytes) // mode: const = 0x0 (2 bytes) // ] // returns fd_tun NONFAILING(memcpy((void*)0x2000000000c0, "/dev/net/tun\000", 13)); syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x2000000000c0ul, /*flags=*/0, /*mode=*/0); break; } } int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); setup_sysctl(); const char* reason; (void)reason; if ((reason = setup_802154())) printf("the reproducer may not work as expected: 802154 injection setup " "failed: %s\n", reason); install_segv_handler(); use_temporary_dir(); loop(); return 0; }