// https://syzkaller.appspot.com/bug?id=65f3caae39807b0b41f8e62dec2a517a7e510651 // 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 #ifndef __NR_clone3 #define __NR_clone3 435 #endif #ifndef __NR_memfd_create #define __NR_memfd_create 319 #endif static unsigned long long procid; 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; } #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, 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 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, loopfd = -1, 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) { memset(loopname, 0, sizeof(loopname)); snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid); if (setup_loop_device(data, size, loopname, &loopfd) == -1) return -1; 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) { ioctl(loopfd, LOOP_CLR_FD, 0); close(loopfd); } errno = err; return res; } static void setup_common() { 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); setsid(); struct rlimit rlim; rlim.rlim_cur = rlim.rlim_max = (200 << 20); setrlimit(RLIMIT_AS, &rlim); rlim.rlim_cur = rlim.rlim_max = 32 << 20; setrlimit(RLIMIT_MEMLOCK, &rlim); rlim.rlim_cur = rlim.rlim_max = 136 << 20; setrlimit(RLIMIT_FSIZE, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_STACK, &rlim); rlim.rlim_cur = rlim.rlim_max = 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); setup_common(); sandbox_common(); drop_caps(); if (unshare(CLONE_NEWNET)) { } write_file("/proc/sys/net/ipv4/ping_group_range", "0 65535"); setup_binderfs(); loop(); exit(1); } #define FS_IOC_SETFLAGS _IOW('f', 2, long) static void remove_dir(const char* dir) { int iter = 0; DIR* dp = 0; retry: while (umount2(dir, MNT_DETACH | UMOUNT_NOFOLLOW) == 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, MNT_DETACH | UMOUNT_NOFOLLOW) == 0) { } struct stat st; if (lstat(filename, &st)) exit(1); if (S_ISDIR(st.st_mode)) { remove_dir(filename); continue; } int i; for (i = 0;; i++) { if (unlink(filename) == 0) break; if (errno == EPERM) { int fd = open(filename, O_RDONLY); if (fd != -1) { long flags = 0; if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) { } close(fd); continue; } } if (errno == EROFS) { break; } if (errno != EBUSY || i > 100) exit(1); if (umount2(filename, MNT_DETACH | UMOUNT_NOFOLLOW)) 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, MNT_DETACH | UMOUNT_NOFOLLOW)) 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 close_fds() { for (int fd = 3; fd < MAX_FDS; fd++) close(fd); } #define USLEEP_FORKED_CHILD (3 * 50 * 1000) static long handle_clone_ret(long ret) { if (ret != 0) { return ret; } usleep(USLEEP_FORKED_CHILD); syscall(__NR_exit, 0); while (1) { } } #define MAX_CLONE_ARGS_BYTES 256 static long syz_clone3(volatile long a0, volatile long a1) { unsigned long copy_size = a1; if (copy_size < sizeof(uint64_t) || copy_size > MAX_CLONE_ARGS_BYTES) return -1; char clone_args[MAX_CLONE_ARGS_BYTES]; memcpy(&clone_args, (void*)a0, copy_size); uint64_t* flags = (uint64_t*)&clone_args; *flags &= ~CLONE_VM; return handle_clone_ret((long)syscall(__NR_clone3, &clone_args, copy_size)); } 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) { 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); close_fds(); } 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 (;;) { if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; sleep_ms(1); 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: memcpy((void*)0x20000000, "hfsplus\000", 8); memcpy((void*)0x20000100, "./file0\000", 8); memcpy( (void*)0x20000c80, "\x78\x9c\xec\xdd\xcd\x6f\x1c\x67\x1d\x07\xf0\xef\x6e\xbc\x6b\x3b\x48" "\xa9\xd3\x26\x69\x40\x95\x88\x1a\xa9\x20\x22\x12\x27\x96\x53\xcc\x85" "\x80\x10\xf2\xa1\x42\x55\x39\x20\x8e\x56\xe2\x34\x56\x36\x6e\x65\xbb" "\xc8\x89\x10\x84\xf7\x03\x17\x0e\xfd\x03\x8a\x84\x6f\x9c\x90\xb8\x47" "\x2a\x67\xe0\xd4\xab\x8f\x95\x90\xb8\xf4\x14\x40\x62\xd1\xcc\xce\xda" "\xeb\x97\xd8\xbb\x8e\xe3\xb5\xd5\xcf\x27\x7a\xf6\x79\x66\x9f\x97\x79" "\xe6\xb7\x33\x3b\x2f\xab\xc8\x01\x3e\xb7\x66\xaf\x64\xe4\x49\x6a\x99" "\xbd\xf2\xd6\x6a\xb1\xbc\xbe\x36\xd5\x5a\x5f\x9b\x7a\xd0\x2d\x27\x19" "\x4d\x52\x4f\x46\x3a\x59\x6a\x8b\x49\xed\xe3\xe4\x56\x3a\x29\x5f\x2c" "\xde\xac\x86\xab\x3d\x6b\x3d\x1f\x2e\xcc\xbc\xf3\xc9\x67\xeb\x9f\x76" "\x96\x46\xaa\x54\xb6\xaf\xef\xd5\x6f\x87\x9b\xbb\xbd\xf9\xb8\x4a\xb9" "\x94\xe4\x54\x95\x3f\x87\x2d\xe3\xdd\xde\x36\x5e\x73\xe0\xe1\x6a\x1b" "\x5b\x58\x04\xec\x72\x37\x70\x30\x6c\x8d\x24\xed\x2d\x7e\x74\x61\xb3" "\x66\x5f\xfd\x1f\xb7\xc0\xb1\x55\xeb\x9c\x37\x77\x1c\xd0\x13\xc9\xe9" "\x24\x63\xd5\x75\x40\xe7\xac\xd8\x39\x67\x9f\x68\x8f\x87\x3d\x01\x00" "\x00\x00\x38\x02\x2f\xfd\xae\xbc\x85\x3f\x33\xec\x79\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\xc0\x49\x52\xfd\xfd\xff\x5a\x95\xea\xdd\xf2" "\xa5\xd4\xba\x7f\xff\xbf\x59\xbd\x97\xaa\x7c\xa2\x3d\x19\xf6\x04\x00" "\x00\x00\x00\x00\x00\x00\xe0\x10\x7c\xf9\x69\x9e\x66\x35\x67\xba\xcb" "\xed\x5a\xf9\x9b\xff\xeb\xe5\xc2\xb9\xf2\xf5\x0b\xf9\x20\xcb\x99\xcf" "\x52\xae\x66\x35\x73\x59\xc9\x4a\x96\x72\x3d\xc9\x44\x59\xdf\x28\x5f" "\x9b\xab\x73\x2b\x2b\x4b\xd7\xfb\xe8\x79\x63\xa3\x67\x7a\x7a\xde\xe8" "\x73\xc2\xe3\x87\xb3\xdd\x00\x00\x00\x00\x00\x00\x00\x70\x9c\x8d\x0c" "\xde\xe5\x17\x99\xdd\xfc\xfd\x1f\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x8e\x83\x5a\x72\xaa\x93\x95\xe9\x5c\xb7\x3c\x91\xfa" "\x48\x92\xb1\x24\xcd\xa2\xdd\xe3\xe4\xef\xdd\xf2\x09\xd0\xfe\x6f\xbb" "\xb4\xa3\xe2\xc9\x50\xa6\x03\x00\x00\x00\x47\xeb\xa5\xa7\x79\x9a\xd5" "\x9c\xe9\x2e\xb7\x6b\xe5\x3d\xff\x85\xf2\xbe\x7f\x2c\x1f\x64\x31\x2b" "\x59\xc8\x4a\x5a\x99\xcf\x9d\xf2\x59\x40\xe7\xae\xbf\xbe\xbe\x36\xd5" "\x5a\x5f\x9b\x7a\x50\xa4\x9d\xe3\x7e\xfb\x5f\x03\x4d\xa3\x1c\x31\x9d" "\x67\x0f\xbb\xaf\xf9\x62\xd9\x62\x3c\x77\xb3\x50\xbe\x73\x35\xb7\xf3" "\x5e\x5a\xb9\x93\x7a\xd9\xb3\x70\xb1\x3b\x9f\xdd\xe7\xf5\xf3\x62\x4e" "\xb5\x6f\x55\xfa\x9c\xd9\x9d\x2a\x2f\xb6\xfc\xf7\x69\x0c\xb4\x55\x07" "\x51\xeb\xbb\xe5\x44\x19\x91\x62\x46\x9d\x88\x4c\x56\x7d\x8b\x68\x9c" "\xdd\x3b\x12\x03\x7e\x3a\xdd\x35\x75\x63\x7f\x3d\xf5\x8d\x27\x3f\xe7" "\x0e\x33\xe6\xab\x9d\xec\xcd\x3f\x76\xf2\x62\x7b\x7e\x33\x50\x4c\x5e" "\xb4\xed\x91\xb8\xd1\xb3\xf7\x5d\xd8\x3b\x12\xc9\x57\xfe\xf2\xa7\x1f" "\xde\x6b\x2d\xde\x1f\xbd\xbb\x7c\xe5\xf8\x6c\xd2\x00\x46\x7b\x9e\xa0" "\x6d\x8f\xc4\x54\x4f\x24\x5e\xed\x37\x12\xf7\x4e\x6a\x24\x7a\x4d\x96" "\x91\x38\xbf\xb1\x3c\x9b\xef\xe5\x07\xb9\x92\x4b\x79\x3b\x4b\x59\xc8" "\x8f\x33\x97\x95\xcc\xe7\x52\xbe\x9b\xb9\x9c\xca\x5c\xb5\x3f\x17\xaf" "\x13\x7b\x47\xea\xd6\x96\xa5\xb7\xf7\x9b\x49\xb3\xfc\x5c\x1a\xd5\xb7" "\x68\xff\x73\x5a\xc9\x5c\x5e\x2f\xfb\x9e\xc9\x42\xbe\x9f\xf7\x72\x27" "\xf3\xb9\x59\xfe\xbb\x91\xeb\x79\x33\xd3\x99\xce\x4c\xcf\x27\x7c\xbe" "\x8f\xa3\xbe\x3e\xd8\x37\xed\xe5\xaf\xf6\x3c\x4c\xfe\x6d\x92\xf1\xfe" "\xfa\x1d\x81\x62\x62\x67\x37\xce\x4e\xbd\x7b\xfd\x64\x79\x1c\x9c\xdd" "\xf2\xce\x66\x94\x5e\x3e\xfc\xf3\xd1\xc8\x97\xaa\x42\xb1\x8e\x5f\x56" "\xf9\xf1\xb0\x3d\x12\xd7\x7b\x22\xf1\xca\xde\x91\xf8\x43\xf9\xb5\xb2" "\xdc\x5a\xbc\xbf\x74\x6f\xee\xfd\x3e\xd7\xf7\x46\x95\x17\xc7\xd1\xaf" "\x8f\xd5\x59\xa2\xd8\x5f\x5e\x2e\x3e\xac\x72\x69\xeb\xde\x51\xd4\xbd" "\xb2\xbd\x6e\xac\x13\xaf\x66\xf5\x8b\x4b\xa7\x6e\xeb\x19\xb7\xa8\x3b" "\xbf\x51\xb7\xdf\x91\xda\xac\xae\xe1\x76\x8e\x74\xa3\xac\x7b\x75\xd7" "\xba\xa9\xb2\xee\x62\x4f\xdd\x96\xeb\xad\x5b\x9d\xeb\x2d\x00\x8e\xbd" "\xd3\x5f\x3b\xdd\x1c\xff\xe7\xf8\xdf\xc6\x3f\x1a\xff\xd5\xf8\xbd\xf1" "\xb7\xc6\xbe\x33\xfa\x8d\xd1\xd7\x9a\x69\xfc\xb5\xf1\xcd\x91\xc9\x53" "\x6f\xd4\x5f\xab\xfd\x39\x1f\xe5\xa7\x9b\xf7\xff\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\xc0\xc1\x2d\x3f\x7c\x74\x7f\xae\xd5\x9a\x5f\xda\x56\x68\xb7\xdb" "\x3f\x7b\x46\xd5\x11\x15\x92\xfd\xda\x34\xb2\x7f\x9b\x17\x53\x68\x26" "\x79\x9e\x71\x46\xfb\x6a\xdc\x7c\xe6\xa7\x33\x60\xa1\x31\x68\xaf\xe4" "\x50\x02\x35\x52\xed\x64\x0f\x1f\xdd\xff\x77\xbb\xdd\x1e\xd2\x8e\xb4" "\xa5\xd0\xd8\x63\x9f\xdf\x2c\xb4\x2b\x43\x9d\xea\x01\x0a\xff\x69\x1f" "\xde\x80\x43\xfe\x62\x02\x5e\xb8\x6b\x2b\x0f\xde\xbf\xb6\xfc\xf0\xd1" "\xd7\x17\x1e\xcc\xbd\x3b\xff\xee\xfc\xe2\xcc\xf4\xf4\xcc\xe4\xcc\xf4" "\xcd\x7f\x5c\xbb\xbb\xd0\x9a\x9f\xec\xbc\x0e\x7b\x96\xc0\x8b\xd0\x7b" "\xbd\x0d\x00\x00\x00\x00\x00\x00\x00\x00\x00\x9c\x0c\x47\xf3\x3f\x79" "\x76\xf5\xbf\x23\xde\x54\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\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\x84\x9a\xbd\x32" "\x5a\x95\xae\x4e\x16\xaf\xeb\x6b\x53\xad\x22\x75\xcb\x1b\x0d\xcb\x66" "\xf5\x24\xb5\x9f\x24\xb5\x8f\x93\x5b\xe9\xa4\x4c\xf4\x0c\x57\x7b\xd6" "\x7a\x3e\x5c\x98\x79\xe7\x93\xcf\xd6\x3f\xed\x2c\x8d\x54\xa9\x6c\x5f" "\xdf\xd2\xaf\x71\x90\xad\x78\x5c\xa5\x5c\x4a\x72\xaa\xca\x7b\x8d\x3d" "\xc7\x78\xb7\xab\xfc\x40\x33\x2b\xd5\x36\xb6\xb0\x08\xd8\xe5\x6e\xe0" "\x60\xd8\xfe\x1f\x00\x00\xff\xff\xa1\x81\x13\xe0", 1644); syz_mount_image(/*fs=*/0x20000000, /*dir=*/0x20000100, /*flags=*/0x1000050, /*opts=*/0x20000080, /*chdir=*/0xc2, /*size=*/0x66c, /*img=*/0x20000c80); break; case 1: memcpy((void*)0x20000180, "./file1\000", 8); syscall(__NR_open, /*file=*/0x20000180ul, /*flags=*/0x14937eul, /*mode=*/0ul); break; case 2: memcpy((void*)0x20000040, "blkio.throttle.io_service_bytes\000", 32); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000040ul, /*flags=*/0x275aul, /*mode=*/0ul); if (res != -1) r[0] = res; break; case 3: syscall(__NR_write, /*fd=*/r[0], /*data=*/0x200000c0ul, /*len=*/0x208e24bul); break; case 4: *(uint64_t*)0x20008400 = 0x42000; *(uint64_t*)0x20008408 = 0; *(uint64_t*)0x20008410 = 0; *(uint64_t*)0x20008418 = 0; *(uint32_t*)0x20008420 = 0x21; *(uint64_t*)0x20008428 = 0x20000240; *(uint64_t*)0x20008430 = 0xa8; *(uint64_t*)0x20008438 = 0; *(uint64_t*)0x20008440 = 0; *(uint64_t*)0x20008448 = 0; *(uint32_t*)0x20008450 = r[0]; syz_clone3(/*args=*/0x20008400, /*size=*/0x58); break; } } int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=*/7ul, /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul); use_temporary_dir(); do_sandbox_none(); return 0; }