// https://syzkaller.appspot.com/bug?id=d5bfa3656b464f6ea64d9f5789b64fb0ce3e4442 // 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 #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; } //% 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; 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")) { } } 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 < 7; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); event_timedwait(&th->done, 50 + (call == 0 ? 4000 : 0) + (call == 6 ? 4000 : 0)); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); } 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*)0x20000100, "ext4\000", 5); memcpy((void*)0x20000500, "./file0\000", 8); memcpy( (void*)0x20000a80, "\x78\x9c\xec\xdd\xcf\x6f\x1c\x57\x1d\x00\xf0\xef\x8c\x7f\x36\x4d\xeb" "\x04\x7a\x80\x0a\x48\x80\x42\x40\x51\x76\xe3\x4d\x1b\x55\xbd\xb4\xb9" "\x80\x50\x55\x09\x51\x71\x40\x1c\x52\x63\x6f\x2c\x93\x5d\xaf\xf1\xae" "\x4b\x6d\x2c\xe1\xfe\x0d\x20\x81\xc4\x09\xfe\x04\x0e\x48\x1c\x90\x7a" "\xe2\xc0\x8d\x23\x12\x07\x84\x54\x0e\x48\x01\x2c\x50\x8c\x04\xd2\xa2" "\x99\x1d\x3b\x5b\x7b\x4d\x96\xec\x7a\x97\x7a\x3f\x1f\x69\x32\xf3\xe6" "\xcd\xcc\xf7\xbd\x6c\x66\xdf\xdb\xb7\x9b\x79\x01\x4c\xac\xab\x11\xb1" "\x17\x11\xb3\x11\xf1\x56\x44\x2c\x14\xfb\x93\x62\x89\xd7\x3a\x4b\x76" "\xdc\xc3\xfd\xdd\xe5\x83\xfd\xdd\xe5\x24\xda\xed\x37\xff\x9a\xe4\xf9" "\xd9\xbe\xe8\x3a\x27\xf3\x74\x71\xcd\xf9\x88\xf8\xda\x97\x23\xbe\x95" "\x9c\x8c\xdb\xdc\xde\xb9\xbf\x54\xab\x55\x37\x8b\x74\xb9\x55\xdf\x28" "\x37\xb7\x77\x6e\xac\xd5\x97\x56\xab\xab\xd5\xf5\x4a\xe5\xf6\xe2\xed" "\x9b\x2f\xdf\x7a\xa9\x32\xb4\xba\x5e\xa9\xff\xfc\xc1\x97\xd6\x5e\xff" "\xfa\xaf\x7e\xf9\xc9\xf7\x7f\xbb\xf7\xc5\xef\x65\xc5\xba\x58\xe4\x75" "\xd7\x63\x98\x3a\x55\x9f\x39\x8a\x93\x99\x8e\x88\xd7\xcf\x22\xd8\x18" "\x4c\x15\xeb\xd9\x31\x97\x83\x27\x93\x46\xc4\x47\x22\xe2\x33\xf9\xfd" "\xbf\x10\x53\xf9\xbf\x4e\x00\xe0\x3c\x6b\xb7\x17\xa2\xbd\xd0\x9d\x06" "\x00\xce\xbb\x34\x1f\x03\x4b\xd2\x52\x44\xa4\x69\xd1\x09\x28\x75\xc6" "\xf0\x9e\x8b\x0b\x69\xad\xd1\x6c\x5d\xbf\xd7\xd8\x5a\x5f\xe9\x8c\x95" "\x5d\x8a\x99\xf4\xde\x5a\xad\x7a\xf3\xf2\xdc\xef\xbf\x93\x1f\x3c\x93" "\x64\xe9\xc5\x3c\x2f\xcf\xcf\xd3\x95\x63\xe9\x5b\x11\x71\x39\x22\x7e" "\x38\xf7\x54\x9e\x2e\x2d\x37\x6a\x2b\xe3\xe9\xf2\x00\xc0\xc4\x7b\xba" "\xbb\xfd\x8f\x88\x7f\xcc\xa5\x69\xa9\xd4\xd7\xa9\x3d\xbe\xd5\x03\x00" "\x3e\x34\xe6\xc7\x5d\x00\x00\x60\xe4\xb4\xff\x00\x30\x79\xb4\xff\x00" "\x30\x79\xfa\x68\xff\x8b\x2f\xfb\xf7\xce\xbc\x2c\x00\xc0\x68\xf8\xfc" "\x0f\x00\x93\x47\xfb\x0f\x00\x93\x47\xfb\x0f\x00\x13\xe5\xab\x6f\xbc" "\x91\x2d\xed\x83\xe2\xf9\xd7\x2b\x6f\x6f\x6f\xdd\x6f\xbc\x7d\x63\xa5" "\xda\xbc\x5f\xaa\x6f\x2d\x97\x96\x1b\x9b\x1b\xa5\xd5\x46\x63\x35\x7f" "\x66\x4f\xfd\x71\xd7\xab\x35\x1a\x1b\x8b\x2f\xc6\xd6\x3b\xe5\x56\xb5" "\xd9\x2a\x37\xb7\x77\xee\xd6\x1b\x5b\xeb\xad\xbb\xf9\x73\xbd\xef\x56" "\x67\x46\x52\x2b\x00\xe0\xbf\xb9\x7c\xe5\xbd\xdf\x25\x11\xb1\xf7\xca" "\x53\xf9\x12\x5d\x73\x39\x68\xab\xe1\x7c\x4b\xc7\x5d\x00\x60\x6c\xa6" "\x06\x39\x59\x07\x01\x3e\xd4\xcc\xf6\x05\x93\xab\xaf\x26\x3c\xef\x24" "\xfc\xe6\xcc\xcb\x02\x8c\x47\xcf\x87\x79\xcf\xf7\xdc\xfc\xa0\x1f\xff" "\x0f\x41\xfc\xce\x08\xfe\xaf\x5c\xfb\x78\xff\xe3\xff\xe6\x78\x86\xf3" "\xc5\xf8\x3f\x4c\xae\x27\x1b\xff\x7f\x75\xe8\xe5\x00\x46\xcf\xf8\x3f" "\x4c\xae\x76\x3b\x39\x3e\xe7\xff\xec\x51\x16\x00\x70\x2e\x0d\xf0\x13" "\xbe\xf6\xf7\x87\xd5\x09\x01\xc6\xea\x71\x93\x79\x0f\xe5\xfb\x7f\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x38\x67\x2e\x46\xc4\xb7\x23\x49\x4b\xf9\x5c" "\xe0\x69\xf6\x67\x5a\x2a\x45\x3c\x13\x11\x97\x62\x26\xb9\xb7\x56\xab" "\xde\x8c\x88\x67\xe3\x4a\x44\xcc\xcc\x65\xe9\xc5\x71\x17\x1a\x00\x18" "\x50\xfa\xe7\xa4\x98\xff\xeb\xda\xc2\x0b\x17\x8f\xe7\xce\x26\xff\x9c" "\xcb\xd7\x11\xf1\xdd\x9f\xbc\xf9\xa3\x77\x96\x5a\xad\xcd\xc5\x6c\xff" "\xdf\x8e\xf6\xcf\x1d\x4e\x1f\x56\x79\x74\xde\x00\xf3\x0a\x02\x00\x43" "\x96\xb7\xdf\x95\x62\xdd\xf5\x41\xfe\xe1\xfe\xee\xf2\xe1\x32\xca\xf2" "\x3c\xb8\x13\xff\x2e\xa6\x22\x5e\x3e\xd8\xdf\xcd\x97\x4e\xce\x74\x64" "\x3b\x23\xe6\xf3\xbe\xc4\x85\xbf\x27\x31\x5d\x9c\x33\x1f\x11\xcf\x47" "\xc4\xd4\x10\xe2\xef\xbd\x1b\x11\x1f\xeb\x55\xff\x24\x1f\x1b\xb9\x54" "\xcc\x7c\xda\x1d\x3f\x8a\xd8\xcf\x8c\x34\x7e\xfa\x81\xf8\x69\x9e\xd7" "\x59\x67\x9d\xaf\x8f\x0e\xa1\x2c\x30\x69\xde\xbb\x13\x11\xaf\xf5\xba" "\xff\xd2\xb8\x9a\xaf\x7b\xdf\xff\xf3\xf9\x3b\xd4\xe0\x1e\xdc\xe9\x5c" "\xec\xf0\xbd\xef\xa0\x2b\xfe\x74\x11\x69\xaa\x47\xfc\xec\x9e\xbf\xda" "\x6f\x8c\x17\x7f\xfd\x95\x13\x3b\xdb\x0b\x9d\xbc\x77\x23\x9e\x9f\xee" "\x15\x3f\x39\x8a\x9f\x9c\x12\xff\x85\x3e\xe3\xff\xe1\x13\x9f\xfa\xc1" "\xab\xa7\xe4\xb5\x7f\x1a\x71\x2d\x7a\xc7\xef\x8e\x55\x6e\xd5\x37\xca" "\xcd\xed\x9d\x1b\x6b\xf5\xa5\xd5\xea\x6a\x75\xbd\x52\xb9\xbd\x78\xfb" "\xe6\xcb\xb7\x5e\xaa\x94\xf3\x31\xea\xf2\xe1\x48\xf5\x49\x7f\x79\xe5" "\xfa\xb3\xa7\x95\x2d\xab\xff\x85\x53\xe2\xcf\xf7\xac\xff\xec\xd1\xb9" "\x9f\xeb\xb3\xfe\x3f\xfb\xd7\x5b\xdf\xfc\xf4\xa3\xe4\xdc\xf1\xf8\x5f" "\xf8\x6c\xef\xd7\xff\xb9\x9e\xf1\x3b\xb2\x36\xf1\xf3\x7d\xc6\x5f\xba" "\xf0\x8b\x53\xa7\xef\xce\xe2\xaf\x9c\x52\xff\xc7\xbd\xfe\xd7\xfb\x8c" "\xff\xfe\x9f\x76\x56\xfa\x3c\x14\x00\x18\x81\xe6\xf6\xce\xfd\xa5\x5a" "\xad\xba\x39\xd0\x46\xf6\x29\x74\x18\xd7\x39\xb1\x91\x15\xb1\xbf\x83" "\x0f\xbb\x8b\x83\x05\xfd\x63\x9c\x45\x2d\x9e\x70\x63\xe6\xac\xfe\x56" "\xcf\x7c\x63\xfa\xa8\xaf\x38\xdc\x2b\x7f\x23\xbb\xe2\x88\xab\x93\x0e" "\xbd\x16\x03\x6d\x3c\x1c\x55\xac\xf1\xbd\x27\x01\xa3\xf1\xe8\xa6\x1f" "\x77\x49\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\xd3\x8c\xe2" "\xbf\x2e\x8d\xbb\x8e\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x9c\x5f\xff\x09\x00\x00\xff\xff\xb3\x8b\xcc\xe8", 1341); syz_mount_image(/*fs=*/0x20000100, /*dir=*/0x20000500, /*flags=MS_LAZYTIME|MS_SILENT|MS_NOSUID*/ 0x2008002, /*opts=*/0x20000080, /*chdir=*/1, /*size=*/0x53b, /*img=*/0x20000a80); break; case 1: memcpy((void*)0x20000100, ".\000", 2); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000100ul, /*flags=*/0ul, /*mode=*/0ul); if (res != -1) r[0] = res; break; case 2: syscall(__NR_getdents64, /*fd=*/r[0], /*ent=*/0x20000000ul, /*count=*/0x5bul); break; case 3: memcpy((void*)0x20000180, "trusted.overlay.nlink\000", 22); syscall(__NR_fsetxattr, /*fd=*/r[0], /*name=*/0x20000180ul, /*val=*/0ul, /*size=*/0ul, /*flags=*/0ul); break; case 4: memcpy((void*)0x20000140, "./file0\000", 8); syscall(__NR_creat, /*file=*/0x20000140ul, /*mode=S_IWUSR*/ 0x80ul); break; case 5: memcpy((void*)0x20000000, "io.stat\000", 8); syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000000ul, /*flags=*/0x275aul, /*mode=*/0ul); break; case 6: memcpy((void*)0x20000040, "vfat\000", 5); memcpy((void*)0x20000100, "./file0\000", 8); syz_mount_image(/*fs=*/0x20000040, /*dir=*/0x20000100, /*flags=MS_DIRSYNC*/ 0x80, /*opts=*/0, /*chdir=*/0, /*size=*/0, /*img=*/0x20000000); break; } } int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); for (procid = 0; procid < 5; procid++) { if (fork() == 0) { use_temporary_dir(); loop(); } } sleep(1000000); return 0; }