// https://syzkaller.appspot.com/bug?id=89d915d5742afef8552cd7cf41c7bfb1314e5196 // 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_bpf #define __NR_bpf 280 #endif #ifndef __NR_memfd_create #define __NR_memfd_create 279 #endif #ifndef __NR_mmap #define __NR_mmap 222 #endif #ifndef __NR_mount #define __NR_mount 40 #endif #ifndef __NR_munmap #define __NR_munmap 215 #endif #ifndef __NR_openat #define __NR_openat 56 #endif #ifndef __NR_writev #define __NR_writev 66 #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 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 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_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"); } 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 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 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); } } static void setup_test() { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); setpgrp(); write_file("/proc/self/oom_score_adj", "1000"); if (symlink("/dev/binderfs", "./binderfs")) { } } 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[] = { {"/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) ; } #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; } static void execute_one(void); #define WAIT_FLAGS __WALL static void loop(void) { 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_one(void) { intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } NONFAILING(memcpy((void*)0x20000040, "ext4\000", 5)); NONFAILING(memcpy((void*)0x20000000, "./file1\000", 8)); NONFAILING(memcpy((void*)0x20000380, "delalloc", 8)); NONFAILING(*(uint8_t*)0x20000388 = 0x2c); NONFAILING(memcpy((void*)0x20000389, "data_err=abort", 14)); NONFAILING(*(uint8_t*)0x20000397 = 0x2c); NONFAILING(memcpy((void*)0x20000398, "barrier", 7)); NONFAILING(*(uint8_t*)0x2000039f = 0x3d); NONFAILING(sprintf((char*)0x200003a0, "0x%016llx", (long long)2)); NONFAILING(*(uint8_t*)0x200003b2 = 0x2c); NONFAILING(memcpy((void*)0x200003b3, "dioread_lock", 12)); NONFAILING(*(uint8_t*)0x200003bf = 0x2c); NONFAILING(memcpy((void*)0x200003c0, "data_err=ignore", 15)); NONFAILING(*(uint8_t*)0x200003cf = 0x2c); NONFAILING(memcpy((void*)0x200003d0, "max_dir_size_kb", 15)); NONFAILING(*(uint8_t*)0x200003df = 0x3d); NONFAILING(sprintf((char*)0x200003e0, "0x%016llx", (long long)0x4007b1)); NONFAILING(*(uint8_t*)0x200003f2 = 0x2c); NONFAILING(memcpy((void*)0x200003f3, "data_err=ignore", 15)); NONFAILING(*(uint8_t*)0x20000402 = 0x2c); NONFAILING(memcpy((void*)0x20000403, "grpquota", 8)); NONFAILING(*(uint8_t*)0x2000040b = 0x2c); NONFAILING(memcpy((void*)0x2000040c, "nobh", 4)); NONFAILING(*(uint8_t*)0x20000410 = 0x2c); NONFAILING(memcpy((void*)0x20000411, "user_xattr", 10)); NONFAILING(*(uint8_t*)0x2000041b = 0x2c); NONFAILING(memcpy((void*)0x2000041c, "bh", 2)); NONFAILING(*(uint8_t*)0x2000041e = 0x2c); NONFAILING(memcpy((void*)0x2000041f, "dioread_nolock", 14)); NONFAILING(*(uint8_t*)0x2000042d = 0x2c); NONFAILING(*(uint8_t*)0x2000042e = 0); NONFAILING(memcpy( (void*)0x20000a40, "\x78\x9c\xec\xdd\xdf\x6b\x5b\x55\x1c\x00\xf0\xef\x4d\xdb\xfd\xd6\x75\x30" "\x86\x8a\x48\x61\x0f\x4e\xe6\xd2\xb5\xf5\xc7\x04\x1f\xe6\xa3\xe8\x70\xa0" "\xef\x33\xb4\x77\x65\x34\x59\x46\x93\x8e\xb5\x0e\xdc\x1e\xdc\x8b\x2f\x32" "\x04\x11\x07\xe2\xbb\xbe\xfb\x38\xfc\x07\xfc\x2b\x06\x3a\x18\x32\x8a\x3e" "\xf8\x12\xb9\xe9\x4d\x97\xad\x49\x9b\x75\xd9\xd2\x99\xcf\x07\x6e\x39\x27" "\xf7\x26\xe7\x7e\x73\xef\xf7\xf4\xdc\x9c\x1b\x12\xc0\xd0\x9a\xc8\xfe\x14" "\x22\x5e\x8e\x88\x6f\x92\x88\x83\x11\x91\xe4\xeb\x46\x23\x5f\x39\xb1\xb6" "\xdd\xea\xfd\xab\xb3\xd9\x92\x44\xa3\xf1\xe9\x5f\x49\x73\xbb\xac\xde\x7a" "\xad\xd6\xf3\xf6\xe7\x95\x97\x22\xe2\xb7\xaf\x22\x8e\x17\x36\xb6\x5b\x5b" "\x5e\x59\x28\x95\xcb\xe9\x62\x5e\x9f\xac\x57\x2e\x4d\xd6\x96\x57\x4e\x5c" "\xa8\x94\xe6\xd3\xf9\xf4\xe2\xf4\xcc\xcc\xa9\xb7\x67\xa6\xdf\x7b\xf7\x9d" "\xbe\xc5\xfa\xc6\xd9\x7f\xbe\xff\xe4\xf6\x87\xa7\xbe\x3e\xba\xfa\xdd\x2f" "\x77\x0f\xdd\x4c\xe2\x74\x1c\xc8\xd7\xb5\xc7\xf1\x04\xae\xb5\x57\x26\x62" "\x22\x7f\x4f\xc6\xe2\xf4\x23\x1b\x4e\xf5\xa1\xb1\x9d\x24\x19\xf4\x0e\xb0" "\x2d\x23\x79\x9e\x8f\x45\xd6\x07\x1c\x8c\x91\x3c\xeb\x81\xff\xbf\x2f\x23" "\xa2\x01\x0c\xa9\x44\xfe\xc3\x90\x6a\x8d\x03\x5a\xd7\xf6\x7d\xba\x0e\x7e" "\x6e\xdc\xfb\x60\xed\x02\x68\x63\xfc\xa3\x6b\x9f\x8d\xc4\x9e\xe6\xb5\xd1" "\xbe\xd5\xe4\xa1\x2b\xa3\xec\x7a\x77\xbc\x0f\xed\x67\x6d\xfc\xfa\xe7\xad" "\x9b\xd9\x12\xfd\xfb\x1c\x02\x60\x4b\xd7\xae\x47\xc4\xc9\xd1\xd1\x8d\xfd" "\x5f\x92\xf7\x7f\xdb\x77\xb2\x87\x6d\x1e\x6d\x43\xff\x07\xcf\xce\xed\x6c" "\xfc\xf3\x66\xa7\xf1\x4f\x61\x7d\xfc\x13\x1d\xc6\x3f\xfb\x3b\xe4\xee\x76" "\x6c\x9d\xff\x85\xbb\x7d\x68\xa6\xab\x6c\xfc\xf7\x7e\xc7\xf1\xef\xfa\xa4" "\xd5\xf8\x48\x5e\x7b\xa1\x39\xe6\x1b\x4b\xce\x5f\x28\xa7\x59\xdf\xf6\x62" "\x44\x1c\x8b\xb1\xdd\x59\x7d\xb3\xf9\x9c\x53\xab\x77\x1a\xdd\xd6\xb5\x8f" "\xff\xb2\x25\x6b\xbf\x35\x16\xcc\xf7\xe3\xee\xe8\xee\x87\x9f\x33\x57\xaa" "\x97\x9e\x24\xe6\x76\xf7\xae\x47\xbc\xd2\x71\xfc\x9b\xac\x1f\xff\xa4\xc3" "\xf1\xcf\xde\x8f\xb3\x3d\xb6\x71\x24\xbd\xf5\x5a\xb7\x75\x5b\xc7\xff\x74" "\x35\x7e\x8a\x78\xbd\xe3\xf1\x7f\x30\xa3\x95\x6c\x3e\x3f\x39\xd9\x3c\x1f" "\x26\x5b\x67\xc5\x46\x7f\xdf\x38\xf2\x7b\xb7\xf6\x07\x1d\x7f\x76\xfc\xf7" "\x6d\x1e\xff\x78\xd2\x3e\x5f\x5b\x7b\xfc\x36\x7e\xdc\xf3\x6f\xda\x6d\xdd" "\x43\xf1\x47\xef\xe7\xff\xae\xe4\xb3\x66\x79\x57\xfe\xd8\x95\x52\xbd\xbe" "\x38\x15\xb1\x2b\xf9\x78\xe3\xe3\xd3\x0f\x9e\xdb\xaa\xb7\xb6\xcf\xe2\x3f" "\x76\x74\xf3\xfe\xaf\xd3\xf9\xbf\x37\x22\x3e\xef\x31\xfe\x1b\x87\x7f\x7e" "\xb5\xa7\xf8\x07\x74\xfc\xe7\x1e\xeb\xf8\x3f\x7e\xe1\xce\x47\x5f\xfc\xd0" "\xad\xfd\xde\xfa\xbf\xb7\x9a\xa5\x63\xf9\x23\xbd\xf4\x7f\xbd\xee\xe0\x93" "\xbc\x77\x00\x00\x00\x00\x00\x00\xb0\xd3\x14\x22\xe2\x40\x24\x85\xe2\x7a" "\xb9\x50\x28\x16\xd7\xee\xef\x38\x1c\xfb\x0a\xe5\x6a\xad\x7e\xfc\x7c\x75" "\xe9\xe2\x5c\x34\xbf\x2b\x3b\x1e\x63\x85\xd6\x4c\xf7\xc1\xb6\xfb\x21\xa6" "\xf2\xfb\x61\x5b\xf5\xe9\x47\xea\x33\x11\x71\x28\x22\xbe\x1d\xd9\xdb\xac" "\x17\x67\xab\xe5\xb9\x41\x07\x0f\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x3b\xc4\xfe\x2e\xdf\xff\xcf\xfc\x31\x32\xe8\xbd\x03" "\x9e\x3a\x3f\xf9\x0d\xc3\x6b\xcb\xfc\xef\xc7\x2f\x3d\x01\x3b\x92\xff\xff" "\x30\xbc\xe4\x3f\x0c\x2f\xf9\x0f\xc3\x4b\xfe\xc3\xf0\x92\xff\x30\xbc\xe4" "\x3f\x0c\x2f\xf9\x0f\xc3\x4b\xfe\x03\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x40\x5f\x9d\x3d\x73\x26\x5b" "\x1a\xab\xf7\xaf\xce\x66\xf5\xb9\xcb\xcb\x4b\x0b\xd5\xcb\x27\xe6\xd2\xda" "\x42\xb1\xb2\x34\x5b\x9c\xad\x2e\x5e\x2a\xce\x57\xab\xf3\xe5\xb4\x38\x5b" "\xad\x6c\xf5\x7a\xe5\x6a\xf5\xd2\xd4\x74\x2c\x5d\x99\xac\xa7\xb5\xfa\x64" "\x6d\x79\xe5\x5c\xa5\xba\x74\xb1\x7e\xee\x42\xa5\x34\x9f\x9e\x4b\xc7\x9e" "\x49\x54\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xf0" "\x7c\xa9\x2d\xaf\x2c\x94\xca\xe5\x74\x51\x41\x61\x5b\x85\xd1\x9d\xb1\x1b" "\x0a\x7d\x2e\x0c\xba\x67\x02\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x80\x07\xfe\x0b\x00\x00\xff\xff\xe8\x06\x37\xb1", 1363)); NONFAILING(syz_mount_image( /*fs=*/0x20000040, /*dir=*/0x20000000, /*flags=MS_LAZYTIME|MS_STRICTATIME|MS_NOSUID|MS_NODEV|MS_MANDLOCK*/ 0x3000046, /*opts=*/0x20000380, /*chdir=*/1, /*size=*/0x553, /*img=*/0x20000a40)); syscall(__NR_munmap, /*addr=*/0x20001000ul, /*len=*/0x3000ul); NONFAILING(*(uint32_t*)0x20000000 = 1); NONFAILING(*(uint32_t*)0x20000004 = 2); NONFAILING(*(uint64_t*)0x20000008 = 0); NONFAILING(*(uint64_t*)0x20000010 = 0); NONFAILING(*(uint32_t*)0x20000018 = 0); NONFAILING(*(uint32_t*)0x2000001c = 0); NONFAILING(*(uint64_t*)0x20000020 = 0); NONFAILING(*(uint32_t*)0x20000028 = 0); NONFAILING(*(uint32_t*)0x2000002c = 0); NONFAILING(memset((void*)0x20000030, 0, 16)); NONFAILING(*(uint32_t*)0x20000040 = 0); NONFAILING(*(uint32_t*)0x20000044 = 0); NONFAILING(*(uint32_t*)0x20000048 = -1); NONFAILING(*(uint32_t*)0x2000004c = 8); NONFAILING(*(uint64_t*)0x20000050 = 0); NONFAILING(*(uint32_t*)0x20000058 = 0); NONFAILING(*(uint32_t*)0x2000005c = 0x10); NONFAILING(*(uint64_t*)0x20000060 = 0); NONFAILING(*(uint32_t*)0x20000068 = 0); NONFAILING(*(uint32_t*)0x2000006c = 0); NONFAILING(*(uint32_t*)0x20000070 = 0); NONFAILING(*(uint32_t*)0x20000074 = 0); NONFAILING(*(uint64_t*)0x20000078 = 0); NONFAILING(*(uint64_t*)0x20000080 = 0); NONFAILING(*(uint32_t*)0x20000088 = 0x10); NONFAILING(*(uint32_t*)0x2000008c = 0); NONFAILING(*(uint32_t*)0x20000090 = 0); syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x20000000ul, /*size=*/0x94ul); NONFAILING(memcpy((void*)0x20004400, "./bus\000", 6)); res = syscall( __NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20004400ul, /*flags=O_NOFOLLOW|O_NOATIME|O_DIRECT|O_CREAT|FASYNC|0x2*/ 0x5a042, /*mode=*/0); if (res != -1) r[0] = res; NONFAILING(*(uint64_t*)0x20000040 = 0x20000800); NONFAILING(memcpy( (void*)0x20000800, "\x78\x1a\xb7\xf8\x61\x6e\x5d\x78\x7d\x3f\xd6\x02\x94\xf5\xe8\x84\xe2\x33" "\x1e\x1b\x18\x21\xac\xfe\x20\x3b\x17\xed\x28\xc5\x6a\x62\x8c\xd7\x75\xce" "\xa5\xcc\xba\x81\x4b\x92\xa3\x03\xcd\xb6\xf1\x66\x80\xad\x2d\xbd\xa2\x25" "\x00\x09\x4d\x38\x46\x83\xd4\x10\xb4\x35\x31\xd0\x36\x3d\x0e\xf2\xcf\x5d" "\x8a\x3b\x2a\x85\x87\x62\x56\xf3\xa7\xa2\x80\xeb\x5a\xc1\xfe\xcb\xd7\x29" "\xf0\x84\x24\xc5\xc5\x48\x5a\x43\x47\x7c\x20\x20\x7b\x23\xef\x18\x71\x81" "\xbb\xac\xad\xeb\x6c\x5f\x73\xad\xab\x73\xf6\xad\x0f\xc6\x98\xcd\x8e\xd0" "\x9c\x8b\x89\x76\xcb\x67\xd5\xb8\xc6\x38\xd6\xe1\x1e\x07\xc8\xe7\x65\x0c" "\xac\x6d\xea\x5f\x3c\x4d\x45\x34\xdd\xab\x35\x65\xa5\x0c\xb3\xcb\x8b\xe6" "\x80\xc9\x84\x30\x81\x65\xab\x04\x76\x15\x32\x10\xcf\x46\x1b\x2e\x85\x6f" "\x03\x3a\x5b\x42\x1d\x44\xf3\x9c\x02\xc8\xd6\x5d\xb9\x80\x1c\x16\x7b\x39" "\xc5\xc5\xa3\x90\xa6\x7d\x9f\x49\x16\xc3\x19\xae\xc8\x6e\x35\xb2\x4c\x87" "\x2f\x23\x3d\x51\x00\xd0\x4c\x1b\x36\xb3\x36\x95\xba\xa6\xbd\x23\x4f\x38" "\x57\x14\x10\x9c\xcf\x08\x8e\xe7\x99\xf8\xb1\x31\x97\xea\x64\x97\x2e\x3e" "\x83\x14\x9c\x58\xd1\x2e\x37\xbb\x83\x24\x3a\xd9\xec\xaa\x78\x13\xbf\x93" "\x85\x39\x9e\x7a\xf8\x66\x0b\x62\xf4\x2e\x7b\xa4\x34\xbf\x08\xc7\x18\xe6" "\x94\x2a\x48\xee\x58\x10\x53\x0a\x87\x0b\x09\xdb\x24\xa6\x7c\xb9\xc2\x5b" "\x8c\x08\x65\x15\x6d\xd4\x4d\x99\x0c\xf1\x2b\xc9\x59\x2c\xff\xb8\xe2\x3c" "\x3c\x8d\x34\xa9\x6f\x9a\xa1\xd8\xd0\xcf\xb9\x2a\xe9\x0f\xa4\xa4\x48\xf5" "\x09\x5e\x88\x3f\x38\x4e\x09\x57\x0e\xb7\x5e\xa0\x0f\xc2\x9d\xdc\x42\x93" "\x48\x4b\x7e\xf7\x77\xb8\x70\x9d\x5b\x47\xdf\x5e\x47\x9d\xa0\xa8\x40\x2f" "\x4f\x27\x4b\x25\xc2\x81\xf8\xb4\x29\xc9\x05\xe7\x7e\xcc\xef\x53\x73\xbc" "\x71\xe0\x9f\x2b\xc5\xb1\x44\xb8\xe3\xe3\x2e\x12\xdd\xf6\xb9\x81\x2e\xd3" "\xaa\x58\x16\x16\xf0\x47\xee\x5b\xb5\xf7\x0b\x44\x35\xc9\xc0\x1c\x39\xf9" "\x59\x08\x64\x45\x8c\x04\xa1\xf5\xf8\x7f\x04\xb1\x35\x81\x0c\xe1\x1e\x53" "\xc5\xb3\xf3\xf5\x26\xd0\xde\x34\xdb\xe0\x1b\x93\xe3\xfe\xbe\x34\x45\x1f" "\x79\x38\x0a\x22\x42\xe3\xa3\x09\x2a\x1c\x65\x66\xfb\x2a\x7e\xf5\xa8\xdd" "\xb9\xab\xee\xae\xb5\x45\xd2\xaf\xd1\x8b\xe7\x54\x0e\x66\x5e\x9e\x83\xb8" "\x68\xbc\x24\xa1\xcc\x8e\x0b\x38\xa9\xf8\x26\xf0\xe4\x4a\x56\x18\xd7\xfc" "\xcc\xd5\x47\xfe\xb3\x1f\xfa\xdb\x1f\xd2\x8e\x5f\x05\xe6\x7d\x09\x04\x9a" "\xe9\xec\x48\x1e\xa3\x63\x43\x83\xb0\x42\xae\x31\x1d\xd9\x44\xfc\x61\x56" "\x0d\xf7\xf4\xd7\x0d\x4b\x36\x5a\x00\x00\x6c\x56\xa8\x56\x58\xea\x05\xb1" "\xcf\xa6\x37\x75\x2e\x19\x45\xc8\xe7\x29\x35\xcc\xe2\x89\x2d\x0e\x49\xc8" "\x0c\x2c\xc2\xcb\xa8\x2c\xeb\x60\x62\x52\x54\xa2\x0d\x32\x45\xa1\x07\x05" "\x12\xa5\x6d\x87\x9d\x5f\x41\xcd\x44\xf2\xdc\xf0\xea\x7c\xbc\x27\xe4\x49" "\xda\x63\xce\x60\x39\xa7\xbc\xe1\x1a\xfc\x75\xd1\x15\x84\x2b\x02\x1e\xeb" "\x3b\xe4\x33\x1d\xde\x3c\x8b\x42\x2f\x26\x72\xcc\xef\x05\xf1\xcc\x05\x35" "\xd7\x47\xcc\x26\x16\xd1\xfc\xfc\xef\x52\xaa\xb2\x40\xb8\x4d\x07\x7c\x41" "\xe3\x85\xc6\x52\xfb\x97\x01\x4a\x08\xed\x27\x8c\x21\xfb\xc8\x5a\x8e\x85" "\x64\x94\x3c\xa0\x84\x84\x65\x07\x27\x91\x0d\x6a\x00\xbf\x5e\xe3\x6d\x79" "\x41\x91\x00\x71\x27\xe9\xa3\x35\x96\x77\x02\x69\xb1\xb8\x1f\x6d\x75\x8a" "\x9b\x1a\xd8\x40\x71\xe1\x04\x60\xea\x6c\xf0\x90\x29\x12\xd3\xe6\x8a\xbb" "\x43\xee\x12\x97\x56\x24\x13\x5b\x52\x86\x7a\x5d\x71\x68\x1d\x92\x96\xe0" "\x04\x2e\xbd\xde\xd2\x56\xb2\x9b\xd4\x27\x66\x2e\x67\x29\x2b\x3f\x8c\x73" "\x5d\xcb\x98\xce\x9d\x1e\x5b\x6c\x9f\x16\xf1\x9b\x0b\x53\x25\xa8\x77\x24" "\x87\xa3\xe4\x00\xaf\x62\xcd\x6c\xd2\x78\x35\xfd\xc9\xdd\x55\x5b\x2a\x45" "\xcc\xae\x72\x43\xab\x2a\x6d\xc7\xf2\xf3\x7e\x4f\x38\xc3\x6a\xb8\xf2\x27" "\xf3\x94\x99\x69\x9e\xe8\xa6\xc6\x03\xaa\x60\x15\x67\xb8\xe0\x7e\xe1\xfe" "\x3d\x80\x84\x8f\x51\xfd\xa5\x94\xd6\x63\x74\x22\xe5\xda\xdc\xac\xad\x3d" "\x07\x12\x68\x06\xd3\xe8\x2b\xd1\x1f\x4a\x94\x5d\xd9\x71\x1b\x33\x6b\x14" "\x38\x37\x54\x62\x6e\xd7\x3b\x5e\x4e\x39\x9b\xdd\x58\x01\xd9\x7b\x99\x98" "\xd6\x6c\x84\x48\xd6\x5f\xe6\x37\x68\x8b\xfb\x11\x63\xaf\x5a\x23\xaf\x61" "\x66\xa7\x0e\xa7\x17\x86\x51\xff\xe0\xa0\xa0\x37\x48\xb4\x11\xc9\xf7\x85" "\x55\x86\x99\xf2\x3c\x25\xf3\x0a\x5a\x9f\x26\x4b\x80\x6f\xd8\x9f\xf3\x3f" "\x13\xfe\x23\xbf\xdb\x1c\xfe\xcc\x22\x06\xb0\x68\xc1\x5c\x91\x4b\xe4\x20" "\x65\x66\x2e\x6a\x5b\x06\x59\xa5\xb6\x92\x89\x0a\x33\x74\x4a\x50\xe3\xe5" "\x1e\xb9\x42\x7f\xfd\x06\x52\x4e\xd7\xbe\xe2\x19\x3f\x9b\xe8\x40\x28\xc4" "\x2d\x78\x16\xf8\xe5\x1d\xdb\x8c\xed\xd4\x77\x8b\x7f\xd4\x65\xd6\xad\xaa" "\x96\x38\xd5\xfd\xae\xc1\x8f\x07\xd8\xbe\x7d\xf3\x7a\x2c\xe2\x5a\x1f\x51" "\x10\x6b\xa8\x38\xab\xb4\x62\x81\x1c\x1a\xa1\xe5\x36\x6b\xd3\x16\x76\x67" "\x8c\x1a\x2d\xb2\xc0\x49\x66\xaa\x8d\x4b\x61\x7b\x56\xee\xa9\xb8\x8c\x0a" "\xa1\xfd\xf4\x9e\x39\x5a\x97\xb9\x91\xcc\x66\x75\xac\xe6\x0c\x5c\x65\x37" "\x47\xfd\x5f\x9c\x8c\xbf\x5a\x83\x33\xfc\xde\xdb\xa6\x2c\xeb\xae\xb7\x93" "\x9d\xdb\xda\x5c\x53\x12\xef\x56\xe3\x23\x9e\xdb\xfe\x5d\x0e\x2e\xf9\x80" "\x10\xf0\xc0\xb8\x55\x16\x38\xf1\xc1\x6f\xce\x81\xa1\xa1\x54\xcd\x49\x28" "\x7e\xa1\x6e\x38\x38\xc0\xb8\x17\x2e\x93\x48\x54\xeb\x6b\x83\x90\x77\x07" "\x95\xdf\x61\xbe\x95\xba\x14\xb8\xe8\x13\x46\xb1\x53\x07\x3d\x25\x7b\x02" "\x4f\x9b\xc1\xc9\xf9\x62\x4a\x25\xb8\x96\xa0\xe8\xa6\xb2\xdd\xb5\x3b\xaf" "\x28\x39\x53\x9a\x78\x75\xe3\x27\xa1\xaf\x31\x3e\xe8\x00\xaf\x4e\xcf\x11" "\x47\xb0\x21\x2d\xfb\x99\x90\xf1\xa0\x2a\xcf\x40\xf1\xeb\x4d\xf4\x7a\x6f" "\x88\x6f\x63\x94\x8d\xa0\x36\x4a\x0c\x4a\x72\xbb\xc8\x60\x51\xff\x9a\x60" "\x22\xe0\xe1\x0e\x0c\xed\x31\x3e\xbf\x9f\x55\x54\x00\xc5\x9e\x06\xed\xe3" "\xd7\x2a\x0e\x36\x65\x3e\x85\x06\x19\xa4\xe7\x7c\x5a\xdc\x1f\xbc\x75\xea" "\x5a\x13\xb1\xbe\xca\xe2\x67\xaf\x81\xed\xeb\x46\x38\xbe\x85\x7b\x9d\x09" "\x44\xc2\x87\xa6\xe2\xaa\xa2\x5d\x6d\x81\xef\x91\xa4\x3d\xff\x0f\xab\x44" "\xf7\x7b\xc8\x77\x87\x1e\x42\xea\x5b\x3a\x91\x17\x06\xa4\x69\x68\x85\xff" "\xdd\x9f\x66\xf3\x83\x6f\xfc\xab\xc3\xb5\x4b\x28\xac\x6a\xa4\x69\xc4\xde" "\xb3\x17\xd3\x1c\x24\xc6\xcb\xf4\xe9\x85\xc3\xbf\x70\x3b\xa6\x3f\xfb\x89" "\xcc\x12\x00\x3d\xf2\xcb\xf8\x5e\x66\x14\xff\x5a\x47\x25\x7f\xe2\x5d\xbd" "\x91\xc6\xec\xe3\x69\xf6\xb6\x1f\xf3\x8d\x4d\xec\xb4\x9b\x2f\x14\xe5\xff" "\xf8\xb6\xef\x70\x95\xed\x88\x70\x84\x23\xd0\x20\xbb\x3c\xe8\x84\xd4\x22" "\x78\x1e\xcd\x99\x8a\xc1\xd4\xfd\x73\xf5\x37\xc9\x11\x83\x32\xd7\x97\x8f" "\x23\x20\x97\x25\xff\x35\xeb\xde\x3c\x27\xd1\x65\xd4\xa8\xfb\x0e\xb9\xb1" "\x9e\x67\x81\x47\x84\xe7\xf7\x51\xe6\xfe\x5a\x0d\xc3\x6a\x76\x3d\x63\x1e" "\x26\x0b\x6f\x96\xe9\xbc\x0b\x54\x9b\x6a\x6c\x3a\xc2\xa6\xad\x76\x33\x24" "\x53\x60\xa7\xf0\xfb\x5e", 1536)); NONFAILING(*(uint64_t*)0x20000048 = 0x2000); syscall(__NR_writev, /*fd=*/r[0], /*vec=*/0x20000040ul, /*vlen=*/2ul); NONFAILING(memcpy((void*)0x20000400, "./file4\000", 8)); NONFAILING( syz_mount_image(/*fs=*/0, /*dir=*/0x20000400, /*flags=MS_POSIXACL|MS_STRICTATIME|MS_SILENT*/ 0x1018000, /*opts=*/0, /*chdir=*/1, /*size=*/0, /*img=*/0)); NONFAILING(memcpy((void*)0x20000040, "./file0\000", 8)); NONFAILING(memcpy((void*)0x20000540, "overlay\000", 8)); NONFAILING(memcpy((void*)0x200006c0, "workdir", 7)); NONFAILING(*(uint8_t*)0x200006c7 = 0x3d); NONFAILING(memcpy((void*)0x200006c8, "./file0", 7)); NONFAILING(*(uint8_t*)0x200006cf = 0x2c); NONFAILING(memcpy((void*)0x200006d0, "lowerdir", 8)); NONFAILING(*(uint8_t*)0x200006d8 = 0x3d); NONFAILING(memset((void*)0x200006d9, 46, 1)); NONFAILING(*(uint8_t*)0x200006da = 0x2c); NONFAILING(memcpy((void*)0x200006db, "upperdir", 8)); NONFAILING(*(uint8_t*)0x200006e3 = 0x3d); NONFAILING(memcpy((void*)0x200006e4, "./file4", 7)); NONFAILING(*(uint8_t*)0x200006eb = 0x2c); NONFAILING(*(uint8_t*)0x200006ec = 0x2c); syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x20000040ul, /*type=*/0x20000540ul, /*flags=MS_POSIXACL*/ 0x10000ul, /*opts=*/0x200006c0ul); } int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-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=*/(intptr_t)-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*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; }