// https://syzkaller.appspot.com/bug?id=7fd6fd80d128efe147bddab480bcf51560bcfbb6 // 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_fspick #define __NR_fspick 433 #endif #ifndef __NR_memfd_create #define __NR_memfd_create 319 #endif static unsigned long long procid; static __thread int clone_ongoing; static __thread int skip_segv; static __thread jmp_buf segv_env; static void segv_handler(int sig, siginfo_t* info, void* ctx) { if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) { exit(sig); } uintptr_t addr = (uintptr_t)info->si_addr; const uintptr_t prog_start = 1 << 20; const uintptr_t prog_end = 100 << 20; int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0; int valid = addr < prog_start || addr > prog_end; if (skip && valid) { _longjmp(segv_env, 1); } exit(sig); } static void install_segv_handler(void) { struct sigaction sa; memset(&sa, 0, sizeof(sa)); sa.sa_handler = SIG_IGN; syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8); syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8); memset(&sa, 0, sizeof(sa)); sa.sa_sigaction = segv_handler; sa.sa_flags = SA_NODEFER | SA_SIGINFO; sigaction(SIGSEGV, &sa, NULL); sigaction(SIGBUS, &sa, NULL); } #define NONFAILING(...) \ ({ \ int ok = 1; \ __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST); \ if (_setjmp(segv_env) == 0) { \ __VA_ARGS__; \ } else \ ok = 0; \ __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST); \ ok; \ }) static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static void use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } static void thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { int state; } event_t; static void event_init(event_t* ev) { ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { if (ev->state) exit(1); __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE); syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1000000); } static void event_wait(event_t* ev) { while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE)) syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0); } static int event_isset(event_t* ev) { return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE); } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; for (;;) { uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts); if (__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE)) return 1; now = current_time_ms(); if (now - start > timeout) return 0; } } static bool write_file(const char* file, const char* what, ...) { char buf[1024]; va_list args; va_start(args, what); vsnprintf(buf, sizeof(buf), what, args); va_end(args); buf[sizeof(buf) - 1] = 0; int len = strlen(buf); int fd = open(file, O_WRONLY | O_CLOEXEC); if (fd == -1) return false; if (write(fd, buf, len) != len) { int err = errno; close(fd); errno = err; return false; } close(fd); return true; } //% 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")) { } } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void execute_one(void) { if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } int i, call, thread; for (call = 0; call < 9; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); event_timedwait(&th->done, 50 + (call == 0 ? 4000 : 0) + (call == 2 ? 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 (;;) { 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[2] = {0xffffffffffffffff, 0xffffffffffffffff}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: NONFAILING(memcpy((void*)0x20000040, "ext4\000", 5)); NONFAILING(memcpy((void*)0x20000200, "./file1\000", 8)); NONFAILING(*(uint8_t*)0x20000140 = 0); NONFAILING(memcpy( (void*)0x200008c0, "\x78\x9c\xec\xdd\xdf\x6b\x5b\x55\x1c\x00\xf0\xef\x4d\xdb\xad\xfb\xa1" "\xed\x60\x0c\xf5\x41\x0a\x7b\x70\x32\x97\xae\xad\x3f\x26\xf8\x30\x1f" "\x45\x87\x03\x7d\xd7\x90\x64\x65\x34\x5d\x46\x93\x8e\xb5\x0e\xdc\x1e" "\xdc\x8b\x2f\x32\x04\x11\x07\xa2\xef\xbe\xfb\x38\xfc\x07\xfc\x2b\x06" "\x3a\x18\x32\x8a\x3e\xec\x25\x72\xd3\x9b\x2e\x5b\x93\x36\xed\xd2\xb5" "\x5b\x3e\x1f\xb8\xed\x39\xf7\xde\xf4\x9c\x6f\xee\xfd\x9e\x9e\x9b\x9b" "\x90\x00\x06\xd6\x44\xfa\x23\x17\xf1\x6a\x44\x7c\x97\x44\x8c\xb5\x6d" "\x1b\x8e\x6c\xe3\xc4\xea\x7e\x2b\x0f\xae\x15\xd3\x25\x89\x46\xe3\xb3" "\x7f\x92\x48\xb2\x75\xad\xfd\x93\xec\xf7\xa1\xac\xf2\x4a\x44\xfc\xf1" "\x4d\xc4\xc9\xdc\xfa\x76\x6b\x4b\xcb\x73\x85\x4a\xa5\xbc\x90\xd5\x27" "\xeb\xf3\x97\x27\x6b\x4b\xcb\xa7\x2e\xce\x17\x66\xcb\xb3\xe5\x4b\xd3" "\x33\x33\x67\xde\x99\x99\x7e\xff\xbd\x77\xfb\x16\xeb\x9b\xe7\xff\xfb" "\xf1\xd3\x3b\x1f\x9d\xf9\xf6\xf8\xca\x0f\xbf\xdd\x3b\x72\x2b\x89\xb3" "\x71\x38\xdb\xd6\x1e\xc7\x53\xb8\xde\x5e\x99\x88\x89\xec\x39\x19\x89" "\xb3\x4f\xec\x38\xd5\x87\xc6\xf6\x92\x64\xb7\x3b\xc0\xb6\x0c\x65\x79" "\x3e\x12\xe9\x18\x30\x16\x43\x59\xd6\x77\xd4\x18\x7b\x96\x5d\x03\x76" "\xd8\xd7\x69\x5a\x03\x03\x2a\x91\xff\x30\xa0\x5a\xf3\x80\xd6\xb5\x7d" "\x9f\xae\x83\x9f\x1b\xf7\x3f\x5c\xbd\x00\x5a\x1f\xff\xf0\xea\x6b\x23" "\x31\xda\xbc\x36\x3a\xb8\x92\x3c\x76\x65\x94\x5e\xef\x8e\xf7\xa1\xfd" "\xb4\x8d\xdf\xff\xbe\x7d\x2b\x5d\xa2\x7f\xaf\x43\x00\x6c\xea\xfa\x8d" "\x88\x38\x3d\x3c\xbc\x7e\xfc\x4b\xb2\xf1\x6f\xfb\x4e\xf7\xb0\xcf\x93" "\x6d\x18\xff\xe0\xd9\xb9\x93\xce\x7f\xde\xea\x34\xff\xc9\xad\xcd\x7f" "\xa2\xc3\xfc\xe7\x50\x87\xdc\xdd\x8e\xcd\xf3\x3f\x77\xaf\x0f\xcd\x74" "\x95\xce\xff\x3e\xe8\x38\xff\x5d\xbb\x69\x35\x3e\x94\xd5\x5e\x6a\xce" "\xf9\x46\x92\x0b\x17\x2b\xe5\x74\x6c\x7b\x39\x22\x4e\xc4\xc8\xfe\xb4" "\xbe\xc1\xfd\x9c\x2f\x73\x2b\x77\x1b\xdd\x36\xb6\xcf\xff\xd2\x25\x6d" "\xbf\x35\x17\xcc\xfa\x71\x6f\x78\xff\xe3\x8f\x29\x15\xea\x85\xa7\x0a" "\xba\xcd\xfd\x1b\x11\xaf\x75\x9c\xff\x26\x6b\xc7\x3f\xe9\x70\xfc\xd3" "\xe7\xe3\x7c\x8f\x6d\x1c\x2b\xdf\x7e\xbd\xdb\xb6\xcd\xe3\xdf\x59\x8d" "\x5f\x22\xde\xe8\x78\xfc\x1f\xdd\xd1\x4a\x36\xbe\x3f\x39\xd9\x3c\x1f" "\x26\x5b\x67\xc5\x7a\xff\xde\x3c\xf6\x67\xb7\xf6\x77\x3b\xfe\xf4\xf8" "\x1f\xdc\x38\xfe\xf1\xa4\xfd\x7e\x6d\x6d\xeb\x6d\xfc\x3c\xfa\xb0\xdc" "\x6d\xdb\x76\xcf\xff\x7d\xc9\xe7\xcd\xf2\xbe\x6c\xdd\xd5\x42\xbd\xbe" "\x30\x15\xb1\x2f\xf9\x64\xfd\xfa\xe9\x47\x8f\x6d\xd5\x5b\xfb\xa7\xf1" "\x9f\x38\xbe\xf1\xf8\xd7\xe9\xfc\x3f\x90\x26\x76\x8f\xf1\xdf\x3c\x7a" "\xb3\x7d\xd7\xd1\xad\xc5\xbf\xb3\xd2\xf8\x4b\x5b\x3a\xfe\x5b\x2f\xdc" "\xfd\xf8\xab\x9f\xba\xb5\xdf\xdb\xf1\x7f\xbb\x59\x3a\x91\xad\xe9\x65" "\xfc\xeb\xb5\x83\x4f\xf3\xdc\x01\x00\x00\x00\x00\x00\xc0\x5e\x93\x8b" "\x88\xc3\x91\xe4\xf2\x6b\xe5\x5c\x2e\x9f\x5f\x7d\x7f\xc7\xd1\x38\x98" "\xab\x54\x6b\xf5\x93\x17\xaa\x8b\x97\x4a\xd1\xfc\xac\xec\x78\x8c\xe4" "\x5a\x77\xba\xc7\xda\xde\x0f\x31\x95\xbd\x1f\xb6\x55\x9f\x7e\xa2\x3e" "\x13\x11\x47\x22\xe2\xfb\xa1\x03\xcd\x7a\xbe\x58\xad\x94\x76\x3b\x78" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xd8\x23" "\x0e\x45\x8c\x76\xfa\xfc\x7f\xea\xaf\xa1\xdd\xee\x1d\xb0\xe3\x36\xf8" "\xca\x6f\xe0\x05\xd7\x3d\xff\xb3\x2d\xfd\xf8\xa6\x27\x60\x4f\xf2\xff" "\x1f\x06\x97\xfc\x87\xc1\x25\xff\x61\x70\xc9\x7f\x18\x5c\xf2\x1f\x06" "\x97\xfc\x87\xc1\x25\xff\x61\x70\x6d\x25\xff\x7f\x3d\xb7\x83\x1d\x01" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x80\x17\xc3\xf9\x73\xe7\xd2\xa5\xb1\xf2\xe0\x5a\x31\xad" "\x97\xae\x2c\x2d\xce\x55\xaf\x9c\x2a\x95\x6b\x73\xf9\xf9\xc5\x62\xbe" "\x58\x5d\xb8\x9c\x9f\xad\x56\x67\x2b\xe5\x7c\xb1\x3a\xbf\xd9\xdf\xab" "\x54\xab\x97\xa7\xa6\x63\xf1\xea\x64\xbd\x5c\xab\x4f\xd6\x96\x96\xbf" "\x98\xaf\x2e\x5e\x7a\xd8\x58\x55\x1e\x79\x26\x51\x01\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xc0\xf3\xa5\xb6\xb4\x3c\x57" "\xa8\x54\xca\x0b\x0a\x0a\xdb\x2a\x0c\xef\x8d\x6e\x28\xf4\xb9\xb0\xdb" "\x23\x13\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x3c\xf2\x7f\x00\x00\x00\xff\xff\xbe\x62\x3f\xb0", 1376)); NONFAILING(syz_mount_image(/*fs=*/0x20000040, /*dir=*/0x20000200, /*flags=MS_RELATIME*/ 0x200000, /*opts=*/0x20000140, /*chdir=*/0xfc, /*size=*/0x560, /*img=*/0x200008c0)); break; case 1: NONFAILING(memcpy((void*)0x20000140, "pids.events\000", 12)); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000140ul, /*flags=*/0x275a, /*mode=*/0); if (res != -1) r[0] = res; break; case 2: NONFAILING(memcpy((void*)0x200000c0, "bfs\000", 4)); NONFAILING(memcpy((void*)0x20000100, "./file0\000", 8)); NONFAILING(memcpy( (void*)0x20002500, "\x9f\xce\xf7\x73\x37\x1e\x4e\x03\x5a\x4f\xf1\x90\xbe\xa4\xef\xd6\x86" "\x42\x04\x6c\x23\xbe\x8a\x9a\xae\x70\xa0\x04\x38\x60\xf9\x89\x31\xe9" "\xa9\xd2\xa4\xcb\x9b\x6c\xbf\xab\x8d\x88\x54\x2e\xaf\xc9\x85\x11\x79" "\xa8\xbc\x28\xda\xd0\xfb\xfc\x05\x80\x4b\x2b", 62)); NONFAILING(memcpy( (void*)0x20000180, "\x78\x9c\xec\xce\xa1\x0d\x02\x41\x14\x04\xd0\xe1\x0c\xa8\x6b\x00\x41" "\x07\xd7\x03\xa5\x10\x24\x38\x14\x84\x84\x8a\x68\x85\x12\xe8\x00\x81" "\xc5\x1c\x62\xc1\xac\xc4\x2c\xb9\xbc\x97\xfc\x9f\x4c\xc6\xcc\xed\x75" "\x5d\xa6\x4f\xc6\x4b\x32\x56\x0e\xc7\xd3\x6e\xb3\x2f\x3f\x4c\x52\x97" "\x64\x9e\x64\x91\x64\xd5\x97\xfc\x58\x97\x6e\xf6\xe9\xef\xcf\xf3\xf6" "\x7b\xad\xf7\x02\x00\x00\xbf\xeb\x32\xd4\x79\x68\x36\x06\x00\x00\x00" "\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\x0f\xbd\x03\x00\x00\xff\xff\xeb\x60" "\x23\x52", 138)); NONFAILING(syz_mount_image(/*fs=*/0x200000c0, /*dir=*/0x20000100, /*flags=*/0, /*opts=*/0x20002500, /*chdir=*/1, /*size=*/0x8a, /*img=*/0x20000180)); break; case 3: syscall(__NR_sync); break; case 4: NONFAILING(sprintf((char*)0x20000000, "0x%016llx", (long long)0)); syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x20000000ul, /*len=*/0xffffff6aul); break; case 5: NONFAILING(memcpy((void*)0x20000280, "memory.numa_stat\000", 17)); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000280ul, /*flags=*/0x275a, /*mode=*/0); if (res != -1) r[1] = res; break; case 6: NONFAILING(*(uint32_t*)0x200003c0 = 0); NONFAILING(*(uint32_t*)0x200003c4 = -1); NONFAILING(*(uint64_t*)0x200003c8 = 0); NONFAILING(*(uint64_t*)0x200003d0 = 0); NONFAILING(*(uint64_t*)0x200003d8 = 0); NONFAILING(*(uint64_t*)0x200003e0 = 4); syscall(__NR_ioctl, /*fd=*/r[1], /*cmd=*/0x8004587d, /*arg=*/0x200003c0ul); break; case 7: syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0xb36000ul, /*prot=PROT_WRITE*/ 2ul, /*flags=MAP_STACK|MAP_POPULATE|MAP_FIXED|MAP_SHARED*/ 0x28011ul, /*fd=*/r[0], /*offset=*/0ul); break; case 8: NONFAILING(memcpy((void*)0x20000000, ".\000", 2)); syscall(__NR_fspick, /*dfd=*/0xffffff9c, /*path=*/0x20000000ul, /*flags=*/0ul); 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); const char* reason; (void)reason; install_segv_handler(); for (procid = 0; procid < 6; procid++) { if (fork() == 0) { use_temporary_dir(); loop(); } } sleep(1000000); return 0; }