// https://syzkaller.appspot.com/bug?id=c08b6a7889fe966f824be8d5bd6554cdc5dc7a9c // 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; 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")) { } } #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) { if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } int i, call, thread; for (call = 0; call < 8; 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 (;;) { 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[3] = {0xffffffffffffffff, 0x0, 0xffffffffffffffff}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: NONFAILING(memcpy((void*)0x20000180, "tmpfs\000", 6)); NONFAILING(memcpy((void*)0x200000c0, "./file0\000", 8)); NONFAILING(syz_mount_image(/*fs=*/0x20000180, /*dir=*/0x200000c0, /*flags=MS_I_VERSION|MS_NOEXEC*/ 0x800008, /*opts=*/0, /*chdir=*/1, /*size=*/0, /*img=*/0x200006c0)); break; case 1: NONFAILING(memcpy((void*)0x20000300, "/dev/fuse\000", 10)); res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x20000300ul, /*flags=*/2ul, /*mode=*/0ul); if (res != -1) r[0] = res; break; case 2: NONFAILING(memcpy((void*)0x200020c0, "./file0\000", 8)); NONFAILING(memcpy((void*)0x20002100, "fuse\000", 5)); NONFAILING(memcpy((void*)0x200003c0, "fd=", 3)); NONFAILING(sprintf((char*)0x200003c3, "0x%016llx", (long long)r[0])); NONFAILING(memcpy((void*)0x200003d5, ",rootmode=00000000000000000040000,user_id=", 42)); NONFAILING(sprintf((char*)0x200003ff, "%020llu", (long long)0)); NONFAILING(memcpy((void*)0x20000413, ",group_id=", 10)); NONFAILING(sprintf((char*)0x2000041d, "%020llu", (long long)0)); syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x200020c0ul, /*type=*/0x20002100ul, /*flags=*/0ul, /*opts=*/0x200003c0ul); break; case 3: res = syscall(__NR_read, /*fd=*/r[0], /*buf=*/0x20002140ul, /*len=*/0x2020ul); if (res != -1) NONFAILING(r[1] = *(uint64_t*)0x20002148); break; case 4: NONFAILING(memcpy( (void*)0x20008400, "\x92\x75\x6f\x43\xb3\x1f\xfe\x54\x27\x88\xef\x58\x6b\x7c\x5a\x34\x44" "\x24\xe3\xac\xac\x25\x90\xbe\x6b\xbe\x37\xad\xfa\xce\x4a\x8f\x2e\x53" "\x4f\xfe\x76\xa8\x3a\x93\xf0\xb3\x68\x0a\x72\xfd\xdf\xde\x83\xf9\x6d" "\x01\x98\x23\x84\xe8\xd6\x89\x21\x9c\xb9\x66\x9b\x14\xdb\xaa\x1b\x79" "\x9f\x82\xea\x1f\xc9\x26\x12\x6a\x41\x63\x61\x8e\x16\xd4\xf9\x41\x43" "\xa4\xe0\xf2\x7c\x44\xfc\xef\x39\x20\xa0\xb3\x80\x5e\xd4\xe7\x80\x98" "\xd8\x68\x9c\xc7\x79\x1b\xd8\x66\x48\x07\x07\x18\xd2\x38\x66\x43\x32" "\x94\x8d\x87\x86\x6c\x8d\x25\x90\xfc\x0f\x01\x7f\x98\x53\xab\xd9\xed" "\x60\xb9\x9f\x1a\xa6\xae\x2d\xbd\x24\xab\x6d\xbc\xeb\xdb\x05\x52\x46" "\x81\x5a\xce\x14\x7c\xc5\x0f\xa3\xb2\x86\x11\x48\xfc\xda\x37\x4d\x5b" "\x20\x3e\x51\xd7\x2c\x45\xe4\xdd\xe3\xe9\xee\x9a\x47\xff\xe4\x58\xba" "\xf7\xbb\x49\x03\x51\x35\xa8\x19\x4a\xa1\xf0\xa8\x3f\xa2\xab\xed\x56" "\x39\x8f\x90\xda\xff\x67\x96\x34\x61\x94\x53\xf5\x33\xf2\x25\x83\xa6" "\xe0\xa4\xdc\x09\xe9\xde\x46\x68\x4d\x5e\x01\x36\xe2\x29\x51\x0f\x37" "\x02\xcf\x3a\x4c\xd0\x06\x5d\x3e\x5d\x3c\x41\x9e\x38\xa8\x0b\x07\x0c" "\xa5\x50\x10\xe0\x82\xa9\xc5\x10\xfd\x18\xcc\x0b\x26\xbb\x5e\x8e\x45" "\x9e\x74\x7b\xef\xbc\x5c\x6b\x60\xac\xe8\x0b\xf4\x14\x17\xb7\xb7\x8c" "\xf5\x7e\x5b\x39\x84\xf0\xcd\xdd\xc6\x15\xc5\xe0\x00\x04\x54\xd3\xf4" "\xa1\x96\xfb\x6d\x18\xaa\x62\x9c\xf0\xb0\x24\x5f\x95\xba\x95\x8d\x86" "\xdc\x17\x56\x16\xf8\xcd\x3a\xc4\x73\x05\x7d\xc3\xa5\xff\x71\x07\x97" "\x33\x26\x35\x01\x07\xf4\x46\x8e\x7e\xcd\x48\xd6\x89\xb8\x2c\x12\xd2" "\x2a\xe5\xf1\x85\x83\x02\xa1\xb4\xcf\xde\x8f\xd3\x47\xa9\x9d\xdc\xde" "\x40\xd1\xc4\x9d\x9b\x50\x99\xfb\xcc\xf0\x9e\x78\x22\x12\xbe\x4b\x2c" "\xe3\x6a\x2b\xc3\xc9\xee\x79\x4a\xbf\xfe\x72\xa5\x50\x1e\x6c\x4f\x3f" "\x7f\x68\xb7\x47\x61\xff\xd6\x62\x06\x09\x22\x4a\x3b\xf1\x1f\x65\x5d" "\xad\xb5\xc8\xa5\x81\x3b\x02\xfb\x46\x83\x0e\x9a\xc6\x82\x5f\x5d\x0e" "\x89\x91\x03\x52\xeb\x3a\x58\xc0\xdd\x82\xd0\x94\xf9\x4d\xd2\xc8\x56" "\x66\xf6\x84\xa8\xf4\x37\xbb\xd0\xe6\x6b\x9f\x4d\x36\x61\x17\xb6\x7a" "\x05\x4d\x21\x2c\x4f\xbc\x28\x78\x48\xcb\x05\x78\x39\x13\x35\xd5\xd6" "\x16\xb1\x4d\x99\xa2\xe3\xdf\x8e\x8a\x15\x2d\x5d\xe9\x9b\xce\xfc\xaa" "\xb5\xbb\x5c\xc7\x1f\x3d\xdd\x66\xb3\x79\xc1\x04\x64\x8e\x19\x0e\x0b" "\x28\xa1\x80\xd3\xae\xcc\x54\x23\x57\x5d\x4b\xa7\xdb\xf3\x12\x15\xc7" "\x17\xda\x7b\x87\xdd\x45\x4b\x6e\xfc\xd3\x6c\x91\xaa\xa6\x31\x12\x7f" "\x5b\xd8\x87\x23\xd2\x21\x75\x2f\x10\x2b\xc0\xc7\xac\x6c\x5c\x7a\x1a" "\xd6\x74\x7a\xf4\x0d\x01\xb6\xd3\x9e\xab\x7b\x0e\x12\x92\xb4\x46\x83" "\xc5\x86\x38\x6a\xd0\x0a\xcf\x60\xfb\x8f\x9b\xac\x55\x1a\x6e\xb5\xba" "\xb7\x31\x7b\x5d\x89\xf6\x4d\xb1\x0b\xd9\x01\x8d\xfa\x6d\x65\xd9\x38" "\x62\xe8\x51\xaf\xbc\x30\xfd\x70\xfe\x5f\x0d\xe3\x22\x46\x20\x45\x17" "\x72\x31\x85\x2c\xa8\x0e\x4e\x78\xda\x4f\xea\x0c\x79\xba\x35\x43\x33" "\x02\x6c\x8b\xc7\x7d\x30\x8a\x8d\x25\x6a\x19\xec\x45\xd2\x08\x8c\x19" "\x66\x91\xd3\xf9\xaa\xc2\x8d\xed\x36\x00\x4a\x65\xee\x1c\xe4\x9b\xa9" "\x59\x9c\xee\xe8\x45\x34\xbb\x61\xd0\x2d\x04\xa6\x73\x2f\x1e\x27\xd7" "\x29\x62\xf7\x4b\x59\xf3\x52\x2b\xf8\x44\xc5\x02\x29\x86\xd5\x59\x34" "\xe4\x8b\x86\x81\xb7\xf5\xb7\x53\x23\x91\x44\x8c\xae\xef\x00\x31\x5d" "\x28\x32\x0a\x46\xd8\xbd\x78\x13\x54\x4e\x1e\x4b\xf9\x94\xe1\x4a\x51" "\x9c\x26\x54\xff\x20\xb4\x2b\xdb\x69\xc2\x62\x89\x7e\x28\xec\xa5\x28" "\xf0\x99\x98\x40\xb0\x0e\xd8\x25\x65\x97\xd2\x7c\xfc\x20\xd7\x1d\x5f" "\x40\xd0\xbb\xca\x75\x9f\x75\x94\xc6\x03\x4a\xa1\xe1\x6a\x84\xed\x15" "\x2f\xad\x0f\xdc\x1c\x30\x3a\x7f\x61\x22\x57\x12\x71\x4f\x82\x3a\xfc" "\x5e\xa2\x41\xd4\x82\xd3\x58\x57\x59\x62\x3a\xf8\xc9\x7c\xa6\xa8\x4a" "\x20\x33\xb3\xd7\x31\x4e\xa0\xef\x7b\xa9\xb2\x88\xb3\x62\xa2\x94\xc9" "\x2c\x8b\x97\x36\x82\x9c\x16\xf6\x1c\x5a\x1e\xe0\x4a\xca\x96\x5d\x71" "\x16\x22\x92\x27\x45\x95\xea\x62\xc9\xc2\x91\x8e\x82\x79\xc9\x9f\x5d" "\x28\x30\xc6\x17\xc5\x82\x11\xfd\x74\x52\x33\x01\x84\xb9\x42\x8d\x5e" "\xc1\xd5\xcd\x75\xdd\xcc\x6d\xe3\x32\x6f\xdc\x70\xe8\x91\x10\x4b\x3b" "\x01\x3c\x30\xff\xcc\xfa\xf3\x30\x8d\x96\x71\xb0\x1f\x6b\x08\x0a\x93" "\x0d\xac\x20\x52\xc6\xf3\x98\x17\xa6\x62\x12\x1d\x90\xd4\x0d\x6a\x1f" "\xac\xfb\x50\xbe\xc7\xd4\x08\x03\x0b\x6d\x0a\xe3\xe7\x44\xf3\xbc\xc3" "\x27\xc3\x5d\xc4\x3c\xf8\x6b\x74\x3d\xb7\x8f\xf2\xe5\x93\xb1\x99\x23" "\x23\x5e\xd6\x46\x7f\x29\x9b\x08\x71\x8f\xe1\x84\x0c\x16\xa7\x48\x93" "\x5d\xff\x94\x11\x50\xfb\x08\xb3\x05\x73\xb3\x7b\xf9\xaf\x5c\x86\xcc" "\x8d\x9e\x22\x9a\x83\x2e\x4e\xf2\x5e\xc9\x1f\x71\x12\x0f\x2b\x3e\x90" "\x62\x48\x59\x76\xc2\x80\xa2\xd1\x72\x38\x60\x29\xe2\xf2\xa4\x80\x11" "\x97\xfc\xa0\xa1\x35\x14\xed\xac\xf5\xdd\xba\xc5\xa6\x2e\x8b\xb1\x3d" "\xd1\x57\x26\x57\xa8\x21\xa8\x73\x92\x97\xf7\x2e\x29\x23\x9d\x1c\xdd" "\xdf\x3e\x30\xcb\xe9\xaf\x31\x41\xf2\x27\x5e\xe4\xae\x85\xd8\x6e\xc8" "\x88\xfe\x9a\x67\x51\xf2\x52\x05\x7e\x95\xb8\xbe\xb0\x55\xe2\x76\x43" "\x95\x81\xaf\xee\x93\xcd\x44\xf1\xe9\x2f\x70\xe5\xf7\x25\x45\x1d\x3a" "\xb6\x62\x91\x8f\xfb\xb1\x26\x95\x09\xfb\xd5\x11\xe9\x5a\x00\xec\x71" "\x7f\x9d\x60\xd6\x43\x86\x4a\xbd\x6a\xd1\xcc\x4d\xd7\xf9\x33\x37\x9a" "\x60\x78\xa8\x6c\x21\x58\xdb\x80\x76\xe7\xb6\x60\x36\x6f\xca\x7b\x1c" "\x46\xd0\x9d\x2c\x8e\x67\xa6\x49\x4b\xfb\x4c\x2c\x67\x50\xe7\x65\x93" "\x89\x5b\x5e\x2b\x2b\xc7\x80\x93\x84\x0c\x3c\x4a\x80\x78\x26\xbc\x27" "\x50\xa9\x6b\x4e\x1d\xd5\xb8\x2b\x49\x2b\xb2\x21\x55\x18\xc9\x20\x64" "\xd1\x76\x3c\x37\x13\x26\x04\xe5\x2e\x73\xfa\xc3\xf4\x51\x1f\x79\x17" "\x53\xae\xec\xfb\xb1\x98\x16\xe0\xda\x7a\x1b\xfb\xea\x9e\xea\xa0\xf2" 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"\xe4\xd6\x56\x70\xa5\x54\xa5\x37\x71\x2c\x6e\xe9\xf7\x51\x91\x63\x1d" "\x2a\x4c\x4d\xa0\x6f\xc3\x84\x23\xb1\xd5\xb8\x28\xd7\x20\x12\x35\xb2" "\x97\x41\x64\xf5\x2a\xa1\x6b\xee\x70\xee\x50\x92\x50\x75\x2f\x4f\xdd" "\x6b\x9f\x8d\x02\x19\x43\xdf\x83\x20\x68\x2a\x6f\x80\xff\x0d\x67\xab" "\x7a\x4c\xee\xa8\x07\xbd\x5b\x3b\x7b\x63\x80\xb0\xc7\xf0\xca\xa6\x7b" "\x02\x08\xba\x71\x31\x7f\x03\x55\xa3\xb7\x55\xaf\x0e\x2c\x00\x71\x86" "\x38\x94\x38\x61\x5d\xf8\x0b\x7b\x25\x10\x4a\x73\x3f\xc9\x06\x25\xb6" "\x26\x82\x19\x87\x33\xc0\xf1\x62\x5d\xfa\xa0\x8c\xf8\x1e\x3d\xf0\x43" "\x09\x4b\x7b\x5a\x09\x8b\x3b\x36\xf8\x03\xb5\xb0\xf1\x0a\x05\x7b\xf8" "\x14\xae\x35\x79\x93\x2c\x0a\x5f\x20\x89\x85\xba\xb3\xd8\x17\xf9\x75" "\x28\x3b\x88\x38\xae\x5c\xb7\x09\xbe\x72\xb5\x8d\xf7\x42\x5e\x05\x9f" "\xdb\xf4\xe0\xee\x51\xb3\xda\x01\xfe\x0b\x44\x96\x3c\x11\x96\xba\xee" "\x5e\xc5\x90\x9a\xd8\x0d\x9d\x16\x60\xf3\xed\xd9\x03\x74\x95\x2a\x0b" "\xf8\xb3\xbe\xce\x2c\x2f\x94\x45\x93\xf4\xde\x7d\xe5\xe0\x5d\xed\x09" "\x6b\x8f\x4f\x05\xd6\x5d\xfc\x2e\x80\x6f\x78\x22\x0d\x84\xb3\xdb\x56" "\x4f\xb1\x2f\x4e\x5e\x8f\x5e\xab\x31\x65\x91\xf0\x04\xe9\x37\x4c\xce" "\x8e\x78\x72\x63\xbc\x38\x27\xaf\xfe\x67\x93\xc1\x30\xb8\x62\x1d\x3b" "\xbb\x2a\x86\xfd\x87\xf0\x70\xea\x21\x71\x82\x81\xee\x7a\xec\x4b\xb3" "\xbb\x71\xaf\x4b\xf5\x72\x1c\xec\xd1\x39\xc4\xbe\x8c\x9d\xf4\xec\x8d" "\xfb\x09\xa5\xcf\x1d\x86\xa2\x5d\x39\xfa\xa9\xf0\x64\xa9\x97\xc2\x14" "\xf3\x34\xe4\x41\x09\x17\xfc\x3b\x4d\x67\xad\xa8\xd8\x7a\x38\xc0\xf8" "\x6b\x02\xbf\x65\x3d\xdd\xae\xb5\xb7\x5b\x30\x0f\x8b\xcf\xd7\x92\x85" "\x8b\xef\x8a\xb2\x3e\x06\x34\x21\x93\x9c\x59\x21\x29\x64\xc9\xed\x5d" "\xd5\x6e\x21\x5d\xb5\x8c\xef\x53\xd3\x1a\x96\x6b\xb8\xce\x4e\xd5\x62" "\x87\xfe\xcb\x3a\x85\xba\x43\x5e\x0b\x41\xb2\x0b\xa1\x16\x4b\x9c\x9f" "\x2c\x49\xfa\x0f\x7b\x17\xa8\x9e\x0e\xc4\x7e\xef\xe9\x92\xd6\x3e\xe2" "\x9c\x8c\x0a\x1e\xce\x26\x64\xfe\xe8\xed\xad\xd4\x36\x36\xa5\x4c\x48" "\x51\x9b\x4f\xcf\x55\xb0\xd9\x10\x36\x02\xb9\x24\x41\xa5\xf8\x5c\xf8" "\xc5\xe4\x06\xd0\xf5\x81\x5f\x8f\x37\x30\x99\x34\xbd\x78\xfb\xc2\xac" "\xf0\xa0\x3b\x05\x1b\x45\x28\xdb\x4f\x7c\x09\xde\x7d\x0a\xab\xaf\xca" "\x37\x36\xb8\x25\x9c\x81\x8c\xa3\x38\xca\x67\x54\xe0\x74\x77\x17\xc2" "\x79\x4d\x66\x4a\x1c\xac\xc1\xe9\xc5\x27\x64\xa3\x08\xe6\xdf\x73\xd9" "\x75\x63\x86\x30\xb7\x4c\xce\x6c\x49\xb1\xba\xc1\x64\x54\xe9\x68\x52" "\xc4\xf9\xd8\xed\x11\x8e\x86\xd2\xf1\xc8\xdc\x33\xbc\xcd\x4a\x07\xbe" "\x12\x8d\xb5\xe8\x0f\x56\x84\xdd\xcc\x11\x58\xe7\x44\x41\x1a\xcd\xe5" "\x90\xf9\x02\xf0\x98\x7c\xfb\x75\x0b\xb5\xbf\xee\xd5\x3b\xff\x07\x68" "\x68\x98\x6b\x56\x6d\x77\x01\xf4\x8d\xdf\xca\xcb\xd3\x25\xc8\xd9\x30" "\xbc\xef\x26\x71\x3b\xf6\x05\x85\xd5\xc9\x91\xe2\xa6\xcc\x33\xcc\xbc" "\x27\xf7\xdd\xfb\xa1\x8f\x99\x84\x97\xc2\xeb\x37\x8c\xc8\xf2\xcc\x07" "\xa1\xb4\xf1\x41\xc5\xe0\xfb\x6f\x52\xe1\x82\x42\xe5\x05\xbc\xf6\xdd" "\x20\xe3\x3a\x46\x9d\x05\x6a\x0b\x4f\xd5\xe7\x2d\x0d\xa9\xd0\xbc\xce" "\x1e\x2f\x9e\x9d\xc7\xd1\xc7\xb6\xcb\x0f\x36\x04\x28\x7e\xca", 8192)); NONFAILING(*(uint64_t*)0x200000c0 = 0); NONFAILING(*(uint64_t*)0x200000c8 = 0); NONFAILING(*(uint64_t*)0x200000d0 = 0); NONFAILING(*(uint64_t*)0x200000d8 = 0); NONFAILING(*(uint64_t*)0x200000e0 = 0); NONFAILING(*(uint64_t*)0x200000e8 = 0); NONFAILING(*(uint64_t*)0x200000f0 = 0); NONFAILING(*(uint64_t*)0x200000f8 = 0); NONFAILING(*(uint64_t*)0x20000100 = 0); NONFAILING(*(uint64_t*)0x20000108 = 0); NONFAILING(*(uint64_t*)0x20000110 = 0); NONFAILING(*(uint64_t*)0x20000118 = 0x20000200); NONFAILING(*(uint32_t*)0x20000200 = 0x90); NONFAILING(*(uint32_t*)0x20000204 = 0); NONFAILING(*(uint64_t*)0x20000208 = 0); NONFAILING(*(uint64_t*)0x20000210 = -1); NONFAILING(*(uint64_t*)0x20000218 = 0); NONFAILING(*(uint64_t*)0x20000220 = 0); NONFAILING(*(uint64_t*)0x20000228 = 0); NONFAILING(*(uint32_t*)0x20000230 = 0); NONFAILING(*(uint32_t*)0x20000234 = 0); NONFAILING(*(uint64_t*)0x20000238 = 0); NONFAILING(*(uint64_t*)0x20000240 = 0); NONFAILING(*(uint64_t*)0x20000248 = 0); NONFAILING(*(uint64_t*)0x20000250 = 0); NONFAILING(*(uint64_t*)0x20000258 = 0); NONFAILING(*(uint64_t*)0x20000260 = 0); NONFAILING(*(uint32_t*)0x20000268 = 0); NONFAILING(*(uint32_t*)0x2000026c = 0); NONFAILING(*(uint32_t*)0x20000270 = 0); NONFAILING(*(uint32_t*)0x20000274 = 0x6000); NONFAILING(*(uint32_t*)0x20000278 = 0); NONFAILING(*(uint32_t*)0x2000027c = 0); NONFAILING(*(uint32_t*)0x20000280 = 0); NONFAILING(*(uint32_t*)0x20000284 = 0x900); NONFAILING(*(uint32_t*)0x20000288 = 0); NONFAILING(*(uint32_t*)0x2000028c = 0); NONFAILING(*(uint64_t*)0x20000120 = 0); NONFAILING(*(uint64_t*)0x20000128 = 0); NONFAILING(*(uint64_t*)0x20000130 = 0); NONFAILING(*(uint64_t*)0x20000138 = 0); NONFAILING(syz_fuse_handle_req(/*fd=*/r[0], /*buf=*/0x20008400, /*len=*/0x2000, /*res=*/0x200000c0)); break; case 5: NONFAILING(*(uint32_t*)0x20000340 = 0x50); NONFAILING(*(uint32_t*)0x20000344 = 0); NONFAILING(*(uint64_t*)0x20000348 = r[1]); NONFAILING(*(uint32_t*)0x20000350 = 7); NONFAILING(*(uint32_t*)0x20000354 = 0x28); NONFAILING(*(uint32_t*)0x20000358 = 0); NONFAILING(*(uint32_t*)0x2000035c = 0); NONFAILING(*(uint16_t*)0x20000360 = 0); NONFAILING(*(uint16_t*)0x20000362 = 0); NONFAILING(*(uint32_t*)0x20000364 = 0); NONFAILING(*(uint32_t*)0x20000368 = 0); NONFAILING(*(uint16_t*)0x2000036c = 0); NONFAILING(*(uint16_t*)0x2000036e = 0); NONFAILING(memset((void*)0x20000370, 0, 32)); syscall(__NR_write, /*fd=*/r[0], /*arg=*/0x20000340ul, /*len=*/0x50ul); break; case 6: NONFAILING(memcpy((void*)0x20000a80, "./file0/file0\000", 14)); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000a80ul, /*flags=*/0ul, /*mode=*/0ul); if (res != -1) r[2] = res; break; case 7: syscall(__NR_ioctl, /*fd=*/r[2], /*cmd=*/0x40480923, /*arg=*/-1); 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 < 5; procid++) { if (fork() == 0) { use_temporary_dir(); loop(); } } sleep(1000000); return 0; }