// https://syzkaller.appspot.com/bug?id=4fc9d2ddc73973ad187070a489f58d30e82148b8 // 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")) { } } 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)); } } #define FUSE_MIN_READ_BUFFER 8192 enum fuse_opcode { FUSE_LOOKUP = 1, FUSE_FORGET = 2, FUSE_GETATTR = 3, FUSE_SETATTR = 4, FUSE_READLINK = 5, FUSE_SYMLINK = 6, FUSE_MKNOD = 8, FUSE_MKDIR = 9, FUSE_UNLINK = 10, FUSE_RMDIR = 11, FUSE_RENAME = 12, FUSE_LINK = 13, FUSE_OPEN = 14, FUSE_READ = 15, FUSE_WRITE = 16, FUSE_STATFS = 17, FUSE_RELEASE = 18, FUSE_FSYNC = 20, FUSE_SETXATTR = 21, FUSE_GETXATTR = 22, FUSE_LISTXATTR = 23, FUSE_REMOVEXATTR = 24, FUSE_FLUSH = 25, FUSE_INIT = 26, FUSE_OPENDIR = 27, FUSE_READDIR = 28, FUSE_RELEASEDIR = 29, FUSE_FSYNCDIR = 30, FUSE_GETLK = 31, FUSE_SETLK = 32, FUSE_SETLKW = 33, FUSE_ACCESS = 34, FUSE_CREATE = 35, FUSE_INTERRUPT = 36, FUSE_BMAP = 37, FUSE_DESTROY = 38, FUSE_IOCTL = 39, FUSE_POLL = 40, FUSE_NOTIFY_REPLY = 41, FUSE_BATCH_FORGET = 42, FUSE_FALLOCATE = 43, FUSE_READDIRPLUS = 44, FUSE_RENAME2 = 45, FUSE_LSEEK = 46, FUSE_COPY_FILE_RANGE = 47, FUSE_SETUPMAPPING = 48, FUSE_REMOVEMAPPING = 49, CUSE_INIT = 4096, CUSE_INIT_BSWAP_RESERVED = 1048576, FUSE_INIT_BSWAP_RESERVED = 436207616, }; struct fuse_in_header { uint32_t len; uint32_t opcode; uint64_t unique; uint64_t nodeid; uint32_t uid; uint32_t gid; uint32_t pid; uint32_t padding; }; struct fuse_out_header { uint32_t len; uint32_t error; uint64_t unique; }; struct syz_fuse_req_out { struct fuse_out_header* init; struct fuse_out_header* lseek; struct fuse_out_header* bmap; struct fuse_out_header* poll; struct fuse_out_header* getxattr; struct fuse_out_header* lk; struct fuse_out_header* statfs; struct fuse_out_header* write; struct fuse_out_header* read; struct fuse_out_header* open; struct fuse_out_header* attr; struct fuse_out_header* entry; struct fuse_out_header* dirent; struct fuse_out_header* direntplus; struct fuse_out_header* create_open; struct fuse_out_header* ioctl; }; static int fuse_send_response(int fd, const struct fuse_in_header* in_hdr, struct fuse_out_header* out_hdr) { if (!out_hdr) { return -1; } out_hdr->unique = in_hdr->unique; if (write(fd, out_hdr, out_hdr->len) == -1) { return -1; } return 0; } static volatile long syz_fuse_handle_req(volatile long a0, volatile long a1, volatile long a2, volatile long a3) { struct syz_fuse_req_out* req_out = (struct syz_fuse_req_out*)a3; struct fuse_out_header* out_hdr = NULL; char* buf = (char*)a1; int buf_len = (int)a2; int fd = (int)a0; if (!req_out) { return -1; } if (buf_len < FUSE_MIN_READ_BUFFER) { return -1; } int ret = read(fd, buf, buf_len); if (ret == -1) { return -1; } if ((size_t)ret < sizeof(struct fuse_in_header)) { return -1; } const struct fuse_in_header* in_hdr = (const struct fuse_in_header*)buf; if (in_hdr->len > (uint32_t)ret) { return -1; } switch (in_hdr->opcode) { case FUSE_GETATTR: case FUSE_SETATTR: out_hdr = req_out->attr; break; case FUSE_LOOKUP: case FUSE_SYMLINK: case FUSE_LINK: case FUSE_MKNOD: case FUSE_MKDIR: out_hdr = req_out->entry; break; case FUSE_OPEN: case FUSE_OPENDIR: out_hdr = req_out->open; break; case FUSE_STATFS: out_hdr = req_out->statfs; break; case FUSE_RMDIR: case FUSE_RENAME: case FUSE_RENAME2: case FUSE_FALLOCATE: case FUSE_SETXATTR: case FUSE_REMOVEXATTR: case FUSE_FSYNCDIR: case FUSE_FSYNC: case FUSE_SETLKW: case FUSE_SETLK: case FUSE_ACCESS: case FUSE_FLUSH: case FUSE_RELEASE: case FUSE_RELEASEDIR: case FUSE_UNLINK: case FUSE_DESTROY: out_hdr = req_out->init; if (!out_hdr) { return -1; } out_hdr->len = sizeof(struct fuse_out_header); break; case FUSE_READ: out_hdr = req_out->read; break; case FUSE_READDIR: out_hdr = req_out->dirent; break; case FUSE_READDIRPLUS: out_hdr = req_out->direntplus; break; case FUSE_INIT: out_hdr = req_out->init; break; case FUSE_LSEEK: out_hdr = req_out->lseek; break; case FUSE_GETLK: out_hdr = req_out->lk; break; case FUSE_BMAP: out_hdr = req_out->bmap; break; case FUSE_POLL: out_hdr = req_out->poll; break; case FUSE_GETXATTR: case FUSE_LISTXATTR: out_hdr = req_out->getxattr; break; case FUSE_WRITE: case FUSE_COPY_FILE_RANGE: out_hdr = req_out->write; break; case FUSE_FORGET: case FUSE_BATCH_FORGET: return 0; case FUSE_CREATE: out_hdr = req_out->create_open; break; case FUSE_IOCTL: out_hdr = req_out->ioctl; break; default: return -1; } return fuse_send_response(fd, in_hdr, out_hdr); } 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 < 6; 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); 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, 0x0}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: memcpy((void*)0x200000c0, "/dev/fuse\000", 10); res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x200000c0ul, /*flags=*/2ul, /*mode=*/0ul); if (res != -1) r[0] = res; break; case 1: memcpy((void*)0x20000040, "fuse\000", 5); memcpy((void*)0x20000000, "./file0\000", 8); memcpy((void*)0x20002280, "fd", 2); *(uint8_t*)0x20002282 = 0x3d; sprintf((char*)0x20002283, "0x%016llx", (long long)r[0]); *(uint8_t*)0x20002295 = 0x2c; memcpy((void*)0x20002296, "rootmode", 8); *(uint8_t*)0x2000229e = 0x3d; sprintf((char*)0x2000229f, "%023llo", (long long)0x4000); *(uint8_t*)0x200022b6 = 0x2c; memcpy((void*)0x200022b7, "user_id", 7); *(uint8_t*)0x200022be = 0x3d; sprintf((char*)0x200022bf, "%020llu", (long long)0); *(uint8_t*)0x200022d3 = 0x2c; memcpy((void*)0x200022d4, "group_id", 8); *(uint8_t*)0x200022dc = 0x3d; sprintf((char*)0x200022dd, "%020llu", (long long)0); *(uint8_t*)0x200022f1 = 0x2c; *(uint8_t*)0x200022f2 = 0; syz_mount_image(/*fs=*/0x20000040, /*dir=*/0x20000000, /*flags=*/0, /*opts=*/0x20002280, /*chdir=*/0, /*size=*/0, /*img=*/0); break; case 2: res = syscall(__NR_read, /*fd=*/r[0], /*buf=*/0x20006340ul, /*len=*/0x2020ul); if (res != -1) r[1] = *(uint64_t*)0x20006348; break; case 3: *(uint32_t*)0x200021c0 = 0x18; *(uint32_t*)0x200021c4 = 0; *(uint64_t*)0x200021c8 = r[1]; *(uint64_t*)0x200021d0 = 7; syscall(__NR_write, /*fd=*/r[0], /*arg=*/0x200021c0ul, /*len=*/0x18ul); break; case 4: memcpy((void*)0x20000080, "./file0\000", 8); memcpy((void*)0x200000c0, "./file0\000", 8); memcpy((void*)0x20000180, "incremental-fs\000", 15); syscall(__NR_mount, /*src=*/0x20000080ul, /*dst=*/0x200000c0ul, /*type=*/0x20000180ul, /*flags=*/0ul, /*opts=*/0ul); break; case 5: memcpy( (void*)0x2000b900, "\xb8\x0f\x31\x1b\x4f\xcf\x60\xca\x4b\x03\x49\x73\x60\x90\x12\x18\x9c" "\x5c\x91\x2f\x0b\x58\x7f\xeb\xeb\x3f\x79\xd5\x02\x87\xd1\x01\x92\xb0" "\xf2\xc2\x81\x53\xae\xb3\x4e\x26\x62\x22\x22\x29\xff\x42\x14\x88\xd7" "\x1c\xd4\x27\x3c\x3e\x40\xe7\xbc\x9a\x84\x7f\x72\x9e\xac\x0d\xa8\xba" "\xb2\x57\xc8\x3c\x34\x2e\x4f\x4e\x1e\x5d\x48\x02\x5a\x3d\x2a\x6b\x69" "\xd6\x38\xb3\x99\x46\x2b\x8a\x0f\x9f\x8c\x49\xb2\x28\x36\x6c\x91\x9b" "\xa2\xb8\xe1\x59\x83\xcc\xfe\x93\xf5\x37\x16\x10\xf8\x9c\x93\x83\x11" "\x81\x90\x64\xd4\x30\xea\x6c\x5d\x7e\x1b\xe9\xd5\x18\x48\x42\xb1\x62" "\x91\x8a\x27\xc8\xb1\x4b\x62\x01\x53\xca\x15\x1c\x64\x3a\x30\x12\xae" "\x3a\x54\xd7\xfd\x6e\xbd\x54\x17\x2a\xa6\x09\x46\x91\xed\xdc\xca\x2f" "\xae\x9e\x0b\x76\xc9\xa1\x63\x93\x1e\x14\x46\x81\x29\x4b\xe4\xb5\xe9" "\xcc\x4c\xe5\x33\x0a\x35\x79\x8a\x35\xca\x90\xdc\x94\xc5\xf5\x0b\xb8" "\xc9\x19\x9d\x3d\xfe\xff\x37\x29\xd6\xdd\x76\x8e\x5a\xe8\xc3\x8a\x07" "\x91\x10\x80\xdc\xbb\xcf\x5c\x37\x1b\x34\x9f\x8d\xf0\x9f\x3b\xf9\x9a" "\x06\x49\xfa\x8f\x3c\xa8\xa1\x85\x18\xf5\x41\xd3\x31\x35\x34\x9e\x04" "\x50\x34\xc4\xed\x76\xae\x59\xbd\x44\x52\x25\x0e\x7d\x14\xfc\x81\x4c" "\x2f\xad\xd3\xd3\x77\xd0\x12\x63\x95\x54\x97\x0b\x5b\x9e\xdb\x0f\x8d" "\xc7\x94\x95\xc5\x4f\x4d\x12\xb3\xf2\x3a\x75\xf5\xe3\x56\xea\xc4\xc9" "\x53\xcb\xe8\xbe\x63\xdd\x70\x60\x75\xf5\x5c\x78\xb8\xa3\xf2\x45\x15" "\xa2\x9f\x8f\xd9\x8f\x85\x66\x1a\x42\x15\xe4\x5e\xe9\x52\xcc\x26\x7b" "\x52\x16\xc8\x82\xcd\xd3\x2a\x68\xa7\x64\xc4\xf5\x35\x57\xa4\xb7\x9f" "\x24\x96\x04\x7e\x46\xde\xef\x37\x45\x0e\xee\xc7\x7c\x62\xe0\xe0\xd8" "\x56\xf9\x56\xf6\x5a\xc6\xbf\x3a\xee\xa0\xad\xc5\x7f\x0a\xe8\xb4\xf2" "\x64\x7e\xbf\xec\x93\xf9\xaa\xfc\x27\x32\x3b\x46\x94\xb7\xb4\xf4\xd2" "\x4b\xcb\xbb\x70\xd7\xc9\xfb\xcd\xce\xf6\x63\x28\xc7\xe5\x1d\xe6\xb6" "\x92\x88\xf9\x64\x73\x21\x04\x99\xa7\xc3\xd7\xf7\x10\x37\x20\xc6\x86" "\x34\x0f\xa8\x85\x39\x9c\xe0\x76\xb2\x9f\x0f\x1d\x18\x65\x38\x9a\x73" "\x59\xcc\xc6\xf8\xf6\x87\xb6\x52\xa1\xd8\x64\x47\xb8\x69\x2b\x52\x2d" "\x59\x48\x9c\x59\x91\xe5\x51\x79\x41\x75\xb2\x3d\x27\xfd\x04\xbd\x8c" "\xd1\xf6\x6d\x86\xb0\x85\x3a\x4b\xfa\x64\xc4\xaa\x61\x02\x5d\xfb\x47" "\x83\x3e\x6d\xf9\x1c\x2d\xcc\x5a\x50\x9f\x35\xb2\x53\xcc\x67\xfc\x6a" "\xef\x68\xb8\x93\x15\x8f\x7a\x6a\x2b\x1f\x0c\x80\x7f\x67\xc3\x2b\x6d" "\xb1\x16\x66\xc3\x6c\x31\x8c\x70\x6b\x1b\x20\x43\xd5\x22\x34\x84\x63" "\xbd\x39\xd6\x60\x15\xb8\x25\x95\x84\x78\x9e\x57\x9e\xd4\x98\x81\x48" "\xa4\x5e\xb9\x7f\x03\xca\xec\xb1\xad\xed\xe8\x6b\xff\xbb\x0d\xa7\x86" "\x72\x92\x2b\x33\x79\x3f\xa5\x1d\x88\x31\x83\xa5\x17\xf9\x83\xe7\x75" "\x4a\xb2\xe0\x13\x86\x17\x46\x8a\xf9\xba\x7c\x60\x51\xc6\x86\xb0\x0f" "\x1f\x10\x82\x43\xf8\x1c\xe0\x76\x08\x47\xa0\x9f\xb9\x3f\xe4\x33\x8e" "\x8b\xa4\x1f\xb9\x18\x7c\xf0\xbe\x7d\x03\x29\x85\xe2\x54\x31\x25\xf3" "\x32\x4b\x3a\x5a\x70\x12\x6b\x49\xa9\x34\xda\xf5\xf8\xec\x80\xf1\x28" "\x01\x9b\x1a\xd9\xcd\x1f\xcc\x55\x0a\xf8\x62\xcd\xff\xff\x99\xb6\x2c" "\xe2\x1c\x98\x99\xf0\xbc\xd3\x2c\xcf\x13\x55\x72\x9a\xc9\x18\x79\x4a" "\x52\x32\xa3\x9d\xbc\x50\xac\xd8\x13\x46\x23\x20\x9f\xa9\xca\x0d\xca" "\x5d\xc5\x29\x45\x14\xe0\x5c\xcf\x9a\xe3\x89\xc7\xd9\x42\x91\xf3\x03" "\x78\xbb\x49\xef\x24\xa6\x01\xb6\xb3\x72\x87\x61\x77\x7c\xd5\x01\x2c" "\x4a\x26\x0e\x97\x2c\xba\xcb\xcb\x38\xd7\x2e\xf3\x58\x00\x0e\xd3\xc5" "\xe9\xe7\xd1\x8c\x0e\x63\xaf\xf5\xa5\x35\x54\x1f\x7e\x9f\xb2\x9a\x06" "\x9f\x69\xf3\xed\x5e\xa5\x6c\x0e\x30\x20\x2a\xc4\x4a\x98\x04\x01\x2a" "\x6c\xe9\x3f\x3d\xa0\xe2\xbf\xe7\x59\x2e\xa5\x28\xd5\xe6\xa2\x11\x3f" "\x32\x19\x71\xf2\x95\xb5\x46\x16\x35\xc0\x72\x38\x5d\xe8\xce\x28\xbe" "\xf0\x45\xe4\xd1\x74\x44\x9e\x1d\xe6\xe2\x8b\xec\xbc\x34\x80\xfa\x1d" "\x34\xcb\x4f\x70\x86\x9e\x4d\x23\x32\x85\xb2\xcf\xd4\xc4\xcc\x56\x5e" "\x46\x5d\x15\x76\x67\x1d\x22\xa2\x29\xd4\xc9\x09\x27\xe6\x5b\x4b\xff" "\x5d\x31\xc3\x74\x7d\x6e\x12\xc4\xcc\xf2\x0b\x6a\xf2\x85\x27\xa3\x97" "\x6c\xfc\x04\x95\xaf\x75\xf5\xa9\x62\x6f\x48\x3f\x28\x81\xe4\x0a\xb4" "\x79\x98\x65\x7d\x70\x55\x71\x55\x9c\x75\x5b\x55\x48\x0f\xb5\x02\xbe" "\xfc\x2b\x03\xc2\x3d\x91\x15\x01\xad\xae\xaf\x02\xf2\x96\x03\x17\xfd" "\x0b\xd2\x54\xdd\xa8\xdf\x84\x50\x8f\xb0\xf4\x2e\xc8\x94\x20\x0f\xd3" "\x10\x12\x6d\x91\x3e\x6a\x16\x2c\xe2\xfc\xfb\x15\x84\x1d\x69\xb6\xa0" "\xc3\x08\xc2\x50\x78\x4f\x26\xf1\x86\x4f\xd7\x5c\x13\xa5\xfd\x01\xcb" "\xcc\x73\x88\x17\xe6\x87\xcf\xc9\x9b\xd1\x59\x3e\xf4\x00\x76\x39\x75" "\x4e\x4e\xbf\xb5\x5b\x04\xb2\xdb\x03\x58\x9e\xb5\x28\x68\xa8\x93\x0d" "\x61\xc9\x5e\x84\x2b\x1d\x80\xc8\x5b\xde\xcf\xc7\x78\x4b\x66\xaa\x91" "\x8e\x56\xbb\x94\xc6\xc2\xed\x24\x77\x5c\x72\x57\x1d\x92\x35\x5e\x93" "\x0f\xbe\x62\x81\xb3\x53\x20\xe7\xe5\x5d\xec\x32\xf9\xcc\x53\x28\xc2" "\xc4\x6d\x65\x6c\x56\x59\x5f\xa8\x18\x92\xbb\xba\xbc\x9c\x55\xc8\x44" "\xeb\xbc\xa0\x35\x71\xa9\xf7\xf1\xea\x4d\xde\xf5\xdc\x25\xec\x14\x0f" "\xad\xae\x36\x7a\x8f\x92\x1f\xcc\x8a\xf6\xb0\x1f\x81\xeb\x2b\x8f\xc3" "\x8f\xd3\xcd\x80\x92\x88\x61\xf7\xc5\x5e\x58\x2d\xc6\x61\xbd\xbc\x61" "\xb8\x83\xc7\x47\xed\x1c\xc5\xb0\x98\x65\x74\x53\x0e\x51\x3f\xa6\xa6" "\x62\x58\xad\xb2\x83\x97\xe1\xf4\x64\x6f\x17\xce\xb1\xba\xad\x17\x84" "\xf4\x1e\xb5\xee\xae\xf3\xfa\x89\x4e\x20\x5c\xd0\xa0\xfa\xf0\xc9\x89" 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"\xc6\xe6\x8d\x06\x33\x2c\xf3\x85\x36\x9e\xd7\xd1\x29\x28\xcf\xa0\x04" "\x16\x89\x2d\x0b\x14\x76\x15\x86\x8c\xa8\x6d\xc9\x24\x30\x73\xa2\x14" "\x0a\xb1\xe0\x2b\xda\x11\xb3\x4c\x45\xc1\xa0\x9a\x82\x25\xdb\x5a\xf2" "\xe0\xbb\x8c\x39\xb0\xb9\x19\x57\xee\x25\xb1\xf9\x1c\xc2\x0c\xa3\xbd" "\x1c\xc1\xee\x46\x6a\x92\xea\x48\xd6\xd1\x2c\x0e\x97\x99\xa6\xc8\xed" "\xbf\x74\xa6\x70\x3d\xfe\xc8\xfa\x19\x34\x0d\x2f\xcf\x66\x16\x7e\x6b" "\xdd\x8a\x36\x48\x07\x6f\xd1\xa9\xc2\x08\x77\x63\xfe\xf0\x5a\xb6\xc3" "\xb5\xef\x16\xe4\x76\xd7\x4d\x1c\xce\x9c\xe0\xf6\x07\xfc\x3b\xa2\x24" "\x7f\xf4\xe3\xf6\x1e\x9c\xbf\x4e\x27\xc9\x58\x83\x95\xaf\x8d\x54\xbb" "\x15\xa8\x18\x08\x60\xba\x29\x81\xaf\x4c\xb2\x9e\xef\x31\xcb\x5b\xe8" "\x17\x18\xb9\x12\x07\x61\x4a\xeb\x6e\xc2\x60\xf3\x88\x54\xd5\x36\xd0" "\x60\x95\xf6\xaa\xee\xb1\x75\x6a\x39\x5c\xa4\x8b\xf1\x21\xab\x3a\x31" "\x19\x17\x7b\xbe\x1c\xeb\x42\x2f\xff\xc9\x7a\x67\x59\x77\xd1\xcb\x9c" "\x7b\xef\xf9\xce\xc6\x97\x6c\xd4\xec\x78\xac\xf7\x24\x79\xb4\x0e\xaf" "\x3f\x02\xb3\x22\x4f\xd1\x37\xcb\x48\xcb\xd1\x9f\xc6\x10\xf0\x6f\x80" "\x89\xd3\xda\x72\xd1\x5a\x3d\xe4\x7c\x8a\xca\x7e\x19\x28\xe8\xd8\x21" "\xcc\x11\x65\xf9\x38\x3d\x68\x23\x3a\x39\x1f\x31\xa0\xfa\x67\x31\x80" "\x53\x49\xd1\x54\x6c\x88\x86\x77\x87\x38\x18\xd6\x6f\xb1\x6f\x86\x5f" "\x11\x3f\xb7\x1b\x91\xae\x25\x8d\x9b\xe2\xa7\xc5\x7f\x54\x22\xae\xaf" "\x01\x6a\x6c\xff\x94\x04\x09\x46\x54\xc8\x41\xdb\xbf\xf4\x4b\xbf\xdb" "\x76\xe1\x20\x29\x57\xa8\xd7\x4c\x9c\xff\xa5\xfb\x7d\xad\xc7\xa4\x84" "\x43\x25\x9d\x68\xb7\x5e\x97\x91\x82\xff\xf0\x9e\x23\xe9\x8b\x74\xc1" "\xac\x2c\x3f\x6e\x24\xdf\x83\xdf\x64\xc7\xf7\x8d\x0f\x18\xc3\xdd\xac" "\x70\x0d\x0e\x0f\xd6\xc1\x02\x6e\x56\x8a\x32\xb8\xd0\xf1\x1d\xde\x6c" "\x55\xa0\xab\xe4\xc9\x10\x5f\xb2\xb9\xcb\xaa\x83\x38\x68\xd1\x50\xb4" "\x7a\x58\xbb\x5e\x7b\x55\xda\x17\x8d\x2e\x44\x26\x91\xeb\xd6\x22\x4f" "\x09\xd2\x3a\x0d\xee\xd5\x9e\x29\x72\xb3\x81\x54\xc0\xba\xc7\x71\x33" "\xaf\x78\x04\xbe\x44\xdd\x17\xf5\x44\x32\xff\x6b\x67\x96\x44\xd7\x5a" "\x1b\xcc\x59\xac\x46\x26\x0e\xf1\x99\xa5\xb7\x51\x49\xb3\xb5\xc8\x2d" "\x04\x46\xfc\xeb\x0e\x4d\x3c\xc8\xe0\xdc\x14\xdc\x07\x45\x0d\x86\x61" "\x8c\x9d\x3a\x8c\xee\xd4\x90\x80\xd1\x0e\x7b\x3b\x28\xa0\xdd\xa9\x24" "\x5d\x5f\xd7\xef\x6f\xed\xb7\x97\x4e\x0f\xf2\x28\xa2\x65\x1e\x6c\xfb" "\x5e\xdc\xfb\x6e\x68\xb3\x41\x3a\x32\xbf\xbf\x12\xbc\x74\x47\x70\x9e" "\x9b\x1e\x41\x1d\x32\x97\xc7\x78\xc2\xe2\x53\x69\x51\xb7\xc4\xff\x57" "\x53\x96\x84\xc2\xd2\x99\x40\x5f\xa7\x76\x94\x26\x2d\x8f\x56\x5c\x89" "\x3e\x83\xf9\x34\x62\x39\x26\x99\x7b\xce\xa7\x80\xa2\xa5\x81\x51\xf3" "\x07\x69\x67\x56\xc8\x2e\x7a\x00\x75\x6c\xa0\xa9\x12\x07\xda\xd2\xb8" "\xfa\x58\xac\x2a\x10\x25\x28\xbb\xc1\xf6\xa1\x05\xa9\xd4\xc9\xb6\x4e" "\xd2\x60\x78\x85\x30\xc5\x79\x06\x04\x3f\x22\xea\x6d\xcb\xa4\xfd\x8e" "\x65\x8a\x64\xfd\x35\x88\xba\x1f\x30\x63\x2d\xf0\xd4\x92\xdf\x63\x49" "\xfe\x3f\xe8\x81\xb5\xf6\x1f\xf7\x4b\x5f\x94\x98\x42\xad\x0e\x42\x8d" "\xb2\x42\x53\xd5\x92\x88\x85\xa9\x7e\xa4\xac\xaf\x03\x1b\x22\x1e\x2a" "\xbf\xdb\x7b\xfd\x16\x65\x38\x9c\x19\xcc\x6a\x44\x09\xaf\xd1\xac\xe8" "\x0b\xfc\x94\xd2\x5a\x24\xd3\x1e\xf2\x80\xd5\x23\xeb\x5c\x79\x3a\xf5" "\xf7\xdb\x1b\x81\x76\x9e\xaa\xa3\xa1\x26\xfa\x72\x67\xf2\xcc\xbd\x28" "\xe8\x2d\xc8\xac\x38\xc1\xec\x2c\xf9\xab\x37\xfc\xf3\x20\xfe", 8192); *(uint64_t*)0x20009300 = 0; *(uint64_t*)0x20009308 = 0; *(uint64_t*)0x20009310 = 0; *(uint64_t*)0x20009318 = 0; *(uint64_t*)0x20009320 = 0; *(uint64_t*)0x20009328 = 0; *(uint64_t*)0x20009330 = 0; *(uint64_t*)0x20009338 = 0; *(uint64_t*)0x20009340 = 0; *(uint64_t*)0x20009348 = 0; *(uint64_t*)0x20009350 = 0; *(uint64_t*)0x20009358 = 0x20008fc0; *(uint32_t*)0x20008fc0 = 0x90; *(uint32_t*)0x20008fc4 = 0; *(uint64_t*)0x20008fc8 = 8; *(uint64_t*)0x20008fd0 = 6; *(uint64_t*)0x20008fd8 = 3; *(uint64_t*)0x20008fe0 = 0x40; *(uint64_t*)0x20008fe8 = 5; *(uint32_t*)0x20008ff0 = 8; *(uint32_t*)0x20008ff4 = 0x500; *(uint64_t*)0x20008ff8 = 1; *(uint64_t*)0x20009000 = 9; *(uint64_t*)0x20009008 = 4; *(uint64_t*)0x20009010 = 3; *(uint64_t*)0x20009018 = 5; *(uint64_t*)0x20009020 = 0x8001; *(uint32_t*)0x20009028 = 0xfffffff9; *(uint32_t*)0x2000902c = 0xd45; *(uint32_t*)0x20009030 = 0x246; *(uint32_t*)0x20009034 = 0x2000; *(uint32_t*)0x20009038 = 0x401; *(uint32_t*)0x2000903c = 0; *(uint32_t*)0x20009040 = 0; *(uint32_t*)0x20009044 = 0xfff; *(uint32_t*)0x20009048 = 0x1c; *(uint32_t*)0x2000904c = 0; *(uint64_t*)0x20009360 = 0; *(uint64_t*)0x20009368 = 0; *(uint64_t*)0x20009370 = 0; *(uint64_t*)0x20009378 = 0; syz_fuse_handle_req(/*fd=*/r[0], /*buf=*/0x2000b900, /*len=*/0x2000, /*res=*/0x20009300); 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(); for (procid = 0; procid < 5; procid++) { if (fork() == 0) { use_temporary_dir(); loop(); } } sleep(1000000); return 0; }