// https://syzkaller.appspot.com/bug?id=bed9892fa476c02b46eb2bc25ec16a44f94970a4 // 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 __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; 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 setup_sysctl() { char mypid[32]; snprintf(mypid, sizeof(mypid), "%d", getpid()); struct { const char* name; const char* data; } files[] = { {"/sys/kernel/debug/x86/nmi_longest_ns", "10000000000"}, {"/proc/sys/kernel/hung_task_check_interval_secs", "20"}, {"/proc/sys/net/core/bpf_jit_kallsyms", "1"}, {"/proc/sys/net/core/bpf_jit_harden", "0"}, {"/proc/sys/kernel/kptr_restrict", "0"}, {"/proc/sys/kernel/softlockup_all_cpu_backtrace", "1"}, {"/proc/sys/fs/mount-max", "100"}, {"/proc/sys/vm/oom_dump_tasks", "0"}, {"/proc/sys/debug/exception-trace", "0"}, {"/proc/sys/kernel/printk", "7 4 1 3"}, {"/proc/sys/kernel/keys/gc_delay", "1"}, {"/proc/sys/vm/oom_kill_allocating_task", "1"}, {"/proc/sys/kernel/ctrl-alt-del", "0"}, {"/proc/sys/kernel/cad_pid", mypid}, }; for (size_t i = 0; i < sizeof(files) / sizeof(files[0]); i++) { if (!write_file(files[i].name, files[i].data)) printf("write to %s failed: %s\n", files[i].name, strerror(errno)); } } 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)); 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[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*)0x20000500, "./file1\000", 8)); NONFAILING(memcpy((void*)0x20000440, "data_err=abort", 14)); NONFAILING(*(uint8_t*)0x2000044e = 0x2c); NONFAILING(memcpy((void*)0x2000044f, "norecovery", 10)); NONFAILING(*(uint8_t*)0x20000459 = 0x2c); NONFAILING(memcpy((void*)0x2000045a, "dioread_lock", 12)); NONFAILING(*(uint8_t*)0x20000466 = 0x2c); NONFAILING(memcpy((void*)0x20000467, "norecovery", 10)); NONFAILING(*(uint8_t*)0x20000471 = 0x2c); NONFAILING(memcpy((void*)0x20000472, "noauto_da_alloc", 15)); NONFAILING(*(uint8_t*)0x20000481 = 0x2c); NONFAILING(memcpy((void*)0x20000482, "resgid", 6)); NONFAILING(*(uint8_t*)0x20000488 = 0x3d); NONFAILING(sprintf((char*)0x20000489, "0x%016llx", (long long)0)); NONFAILING(*(uint8_t*)0x2000049b = 0x2c); NONFAILING(memcpy((void*)0x2000049c, "barrier", 7)); NONFAILING(*(uint8_t*)0x200004a3 = 0x2c); NONFAILING(memcpy((void*)0x200004a4, "auto_da_alloc", 13)); NONFAILING(*(uint8_t*)0x200004b1 = 0x2c); NONFAILING(memcpy((void*)0x200004b2, "max_dir_size_kb", 15)); NONFAILING(*(uint8_t*)0x200004c1 = 0x3d); NONFAILING(sprintf((char*)0x200004c2, "0x%016llx", (long long)0x4e1)); NONFAILING(*(uint8_t*)0x200004d4 = 0x2c); NONFAILING(*(uint8_t*)0x200004d5 = 0); NONFAILING(memcpy( (void*)0x20000540, "\x78\x9c\xec\xdd\xdf\x6b\x5b\xd7\x1d\x00\xf0\xef\xbd\xb6\xb2\xfc\x70" "\x66\x67\xdb\x43\x16\x58\x16\x96\x0c\x27\x6c\x91\xec\x78\x49\xcc\x1e" "\xb2\x0c\xc6\xf2\x14\xd8\x96\xbd\x67\x9e\x2d\x1b\x63\xd9\x32\x96\x9c" "\xc4\x26\x0c\x87\xfd\x01\x83\x31\xb6\x41\x9f\xfa\xd4\x97\x42\xff\x80" "\x42\xc9\x9f\x50\x0a\x81\xf6\xbd\xb4\xa5\xa5\xb4\x49\xfb\xd0\x87\xb6" "\x2a\x92\xae\xd2\xc4\x95\x62\x87\xc8\xbe\xc5\xfe\x7c\xe0\xe6\x9e\x73" "\xaf\xa4\xef\xf7\xc4\xe8\xe8\x9e\x7b\x8f\x74\x03\xd8\xb7\x4e\x45\xc4" "\xd5\x88\x18\x88\x88\x73\x11\x31\x9c\x6d\x4f\xb3\xe5\x5a\xb3\xb2\xd1" "\x7e\xdc\xa3\x87\x77\xa7\x9b\x4b\x12\x8d\xc6\x8d\x4f\x92\x48\xb2\x6d" "\x9d\xd7\x4a\xb2\xf5\x91\xf6\x53\xe2\x60\x44\xfc\xe5\x5a\xc4\xdf\x93" "\xef\xc6\xad\xad\xad\x2f\x4c\x55\x2a\xe5\x95\xac\x5e\xaa\x2f\x2e\x97" "\x6a\x6b\xeb\xe7\xe7\x17\xa7\xe6\xca\x73\xe5\xa5\x89\x89\xf1\x4b\x93" "\x97\x27\x2f\x4e\x8e\xf5\xa5\x9d\x23\x11\x71\xe5\x0f\x1f\xfc\xf7\x5f" "\xaf\xfc\xf1\xca\x1b\xbf\xbe\xfd\xee\xcd\x8f\xce\xfe\xa3\x99\xd6\x50" "\xb6\xff\xc9\x76\xf4\x53\xbb\xe9\x85\xd6\xff\x45\xc7\x60\x44\xac\xec" "\x44\xb0\x1c\x0c\x64\xeb\x42\xce\x79\x00\x00\xb0\x3d\xcd\x63\xfc\x1f" "\x45\xc4\x2f\x5a\xc7\xff\xc3\x31\xd0\x3a\x3a\x05\x00\x00\x00\xf6\x92" "\xc6\xef\x86\xe2\xcb\x24\xa2\x01\x00\x00\x00\xec\x59\x69\x6b\x0e\x6c" "\x92\x16\xb3\xb9\x00\x43\x91\xa6\xc5\x62\x7b\x0e\xef\x4f\xe2\x70\x5a" "\xa9\xd6\xea\xbf\x9a\xad\xae\x2e\xcd\xb4\xe7\xca\x8e\x44\x21\x9d\x9d" "\xaf\x94\xc7\xb2\xb9\xc2\x23\x51\x48\x9a\xf5\xf1\x6c\x8e\x6d\xa7\x7e" "\x61\x53\x7d\x22\x22\x8e\x45\xc4\x7f\x86\x0f\xb5\xea\xc5\xe9\x6a\x65" "\x26\xef\x93\x1f\x00\x00\x00\xb0\x4f\x1c\xc9\xc6\xff\x9d\xef\x71\x7e" "\x3e\xdc\x1e\xff\x03\x00\x00\x00\x7b\xcc\x48\xde\x09\x00\x00\x00\x00" "\x3b\xce\xf8\x1f\x00\x00\x00\xf6\x3e\xe3\x7f\x00\x00\x00\xd8\xd3\xfe" "\x74\xfd\x7a\x73\x69\x74\xee\x7f\x3d\x73\x6b\x6d\x75\xa1\x7a\xeb\xfc" "\x4c\xb9\xb6\x50\x5c\x5c\x9d\x2e\x4e\x57\x57\x96\x8b\x73\xd5\xea\x5c" "\xeb\x37\xfb\x16\xb7\x7a\xbd\x4a\xb5\xba\xfc\x9b\x58\x5a\xbd\x53\xaa" "\x97\x6b\xf5\x52\x6d\x6d\xfd\xe6\x62\x75\x75\xa9\x7e\x73\xfe\xa9\x5b" "\x60\x03\x00\x00\x00\xbb\xe8\xd8\xcf\xef\xbf\x93\x44\xc4\xc6\x6f\x0f" "\xb5\x96\xa6\x03\x79\x27\x05\xec\x8a\xe4\x79\x1e\xfc\xfe\xce\xe5\x01" "\xec\xbe\x81\xbc\x13\x00\x72\x33\x98\x77\x02\x40\x6e\x0a\x79\x27\x00" "\xe4\x6e\xab\xf3\x00\x3d\x27\xef\xbc\xd9\xff\x5c\x00\x00\x80\x9d\x31" "\xfa\xd3\xde\xd7\xff\x9d\x1b\x80\xbd\x2d\xcd\x3b\x01\x00\x60\xd7\xb9" "\xfe\x0f\xfb\x57\xc1\x0c\x40\xd8\xf7\x7e\xb8\xc5\xfe\x17\xbf\xfe\xdf" "\x68\x3c\x57\x42\x00\x00\x40\xdf\x0d\xb5\xbe\x03\x98\xa4\xc5\xec\x5a" "\xe0\x50\xa4\x69\xb1\x18\x71\xb4\x75\x5b\x80\x42\x32\x3b\x5f\x29\x8f" "\xb5\xc7\x07\xc9\xdb\xc3\x85\x1f\x34\xeb\xe3\xad\x67\x26\xcf\xf7\xdd" "\x61\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\xd8\xc7\x1a\x8d\x24\x1a\x00\x00\x00\xc0\x9e\x16\x91\x7e" "\x98\xb4\x7e\xcd\x3f\x62\x74\xf8\xcc\xd0\xe6\xf3\x03\x07\x92\x2f\x86" "\x5b\xeb\x88\xb8\xfd\xd2\x8d\xff\xdd\x99\xaa\xd7\x57\xc6\x9b\xdb\x3f" "\x7d\xbc\xbd\xfe\xff\x6c\xfb\x85\x3c\xce\x60\x00\x00\x00\x00\x9b\x75" "\xc6\xe9\x9d\x71\x3c\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\xf4\xd3\xa3\x87\x77\xa7\x3b\xcb" "\x6e\xc6\xfd\xf8\xf7\x11\x31\xd2\x2d\xfe\x60\x1c\x6c\xad\x0f\x46\x21" "\x22\x0e\x7f\x96\xc4\xe0\x13\xcf\x4b\x22\x62\xa0\x0f\xf1\x37\xee\x45" "\xc4\xf1\x6e\xf1\x93\x66\x5a\x31\x92\x65\xd1\x2d\xfe\xa1\x1c\xe3\xa7" "\x11\x71\xa4\x0f\xf1\x61\x3f\xbb\xdf\xec\x7f\xae\x76\x7b\xff\xa5\x71" "\xaa\xb5\xee\xfe\xfe\x1b\xcc\x96\x17\xd5\xbb\xff\x4b\x1f\xf7\x7f\x03" "\x3d\xfa\x9f\xa3\xdb\x8c\x71\xe2\xc1\x6b\xa5\x9e\xf1\xef\x45\x9c\x18" "\xec\xde\xff\x74\xe2\x27\x3d\xe2\x9f\xde\x66\xfc\xbf\xfd\x75\x7d\xbd" "\xd7\xbe\xc6\xcb\x11\xa3\x5d\x3f\x7f\x92\xa7\x62\x95\xea\x8b\xcb\xa5" "\xda\xda\xfa\xf9\xf9\xc5\xa9\xb9\xf2\x5c\x79\x69\x62\x62\xfc\xd2\xe4" "\xe5\xc9\x8b\x93\x63\xa5\xd9\xf9\x4a\x39\xfb\xb7\x6b\x8c\x7f\xff\xec" "\xf5\xaf\x9f\xd5\xfe\xc3\x3d\xe2\x8f\x6c\xd1\xfe\x33\xdb\x6c\xff\x57" "\x0f\xee\x3c\xfc\x71\xbb\x58\xe8\x16\xff\xec\xe9\xee\x9f\xbf\xc7\x7b" "\xc4\x4f\xb3\xcf\xbe\x5f\x66\xe5\xe6\xfe\xd1\x4e\x79\xa3\x5d\x7e\xd2" "\xc9\x57\xdf\x3a\xf9\xac\xf6\xcf\xf4\x68\xff\x56\x7f\xff\xb3\xdb\x6c" "\xff\xb9\x3f\xff\xf3\xbd\x6d\x3e\x14\x00\xd8\x05\xb5\xb5\xf5\x85\xa9" "\x4a\xa5\xbc\xa2\xa0\xb0\xb3\x85\x03\xdf\x8f\x34\x14\xb6\x57\xc8\xbb" "\x67\x02\x00\x00\xfa\xed\xdb\x83\xfe\xbc\x33\x01\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\xfd\x6b\x37\x7e\x4e\x6c\x73" "\xcc\x8d\x7c\x9a\x0a\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xf0\x4c\xdf" "\x04\x00\x00\xff\xff\x59\x5b\xd4\x59", 1216)); NONFAILING(syz_mount_image(/*fs=*/0x20000040, /*dir=*/0x20000500, /*flags=MS_REC|MS_NOATIME|0x100*/ 0x4500, /*opts=*/0x20000440, /*chdir=*/0x11, /*size=*/0x4c0, /*img=*/0x20000540)); break; case 1: NONFAILING(memcpy((void*)0x20002000, "./bus\000", 6)); res = syscall( __NR_open, /*file=*/0x20002000ul, /*flags=O_SYNC|O_NOCTTY|O_NOATIME|O_CREAT|FASYNC|0x2*/ 0x143142ul, /*mode=*/0ul); if (res != -1) r[0] = res; break; case 2: NONFAILING(*(uint32_t*)0x200002c0 = 0x78); NONFAILING(*(uint32_t*)0x200002c4 = 0); NONFAILING(*(uint64_t*)0x200002c8 = 0); NONFAILING(*(uint64_t*)0x200002d0 = 0); NONFAILING(*(uint32_t*)0x200002d8 = 0); NONFAILING(*(uint32_t*)0x200002dc = 0); NONFAILING(*(uint64_t*)0x200002e0 = 0); NONFAILING(*(uint64_t*)0x200002e8 = 0); NONFAILING(*(uint64_t*)0x200002f0 = 0); NONFAILING(*(uint64_t*)0x200002f8 = 0); NONFAILING(*(uint64_t*)0x20000300 = 0); NONFAILING(*(uint64_t*)0x20000308 = 0); NONFAILING(*(uint32_t*)0x20000310 = 0); NONFAILING(*(uint32_t*)0x20000314 = 0); NONFAILING(*(uint32_t*)0x20000318 = 0); NONFAILING(*(uint32_t*)0x2000031c = 0); NONFAILING(*(uint32_t*)0x20000320 = 0); NONFAILING(*(uint32_t*)0x20000324 = 0); NONFAILING(*(uint32_t*)0x20000328 = 0); NONFAILING(*(uint32_t*)0x2000032c = 0); NONFAILING(*(uint32_t*)0x20000330 = 0); NONFAILING(*(uint32_t*)0x20000334 = 0); syscall(__NR_write, /*fd=*/r[0], /*arg=*/0x200002c0ul, /*len=*/0xfffffea1ul); break; case 3: NONFAILING(memcpy((void*)0x20000380, "/dev/loop", 9)); NONFAILING(*(uint8_t*)0x20000389 = 0x30 + procid * 1); NONFAILING(*(uint8_t*)0x2000038a = 0); NONFAILING(memcpy((void*)0x20000140, "./bus\000", 6)); syscall(__NR_mount, /*src=*/0x20000380ul, /*dst=*/0x20000140ul, /*type=*/0ul, /*flags=MS_BIND*/ 0x1000ul, /*data=*/0ul); break; case 4: NONFAILING(memcpy((void*)0x20000400, "./bus\000", 6)); res = syscall(__NR_open, /*file=*/0x20000400ul, /*flags=O_SYNC|O_NOCTTY|O_NOATIME|O_RDWR|0x3c*/ 0x14113eul, /*mode=*/0ul); if (res != -1) r[1] = res; break; case 5: syscall(__NR_write, /*fd=*/r[1], /*data=*/0x20000100ul, /*len=*/0x208e24bul); break; case 6: NONFAILING(*(uint16_t*)0x20000080 = 0); NONFAILING(*(uint16_t*)0x20000082 = 0); NONFAILING(*(uint64_t*)0x20000088 = 0); NONFAILING(*(uint64_t*)0x20000090 = 0xffffffff); NONFAILING(*(uint32_t*)0x20000098 = 0); NONFAILING(*(uint32_t*)0x2000009c = 0x48000000); NONFAILING(memset((void*)0x200000a0, 0, 16)); syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x4030582b, /*arg=*/0x20000080ul); 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); setup_sysctl(); install_segv_handler(); for (procid = 0; procid < 5; procid++) { if (fork() == 0) { use_temporary_dir(); loop(); } } sleep(1000000); return 0; }