// https://syzkaller.appspot.com/bug?id=d446033bdbea6f4bb32a9af4d35209886c537173 // 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 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"); } else if (strncmp(fs, "gfs2", 4) == 0 && (strstr(opts, "errors=panic") || strstr(opts, "debug"))) { strcat(opts, ",errors=withdraw"); } 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; } 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"); } 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 < 3; 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); if (call == 0) break; event_timedwait(&th->done, 50 + (call == 0 ? 4000 : 0) + (call == 1 ? 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++) { reset_loop(); int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { 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; } } } void execute_call(int call) { switch (call) { case 0: // syz_mount_image$ext4 arguments: [ // fs: ptr[in, buffer] { // buffer: {65 78 74 34 00} (length 0x5) // } // dir: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8) // } // flags: mount_flags = 0x1008002 (8 bytes) // opts: ptr[in, fs_options[ext4_options]] { // fs_options[ext4_options] { // elems: array[fs_opt_elem[ext4_options]] { // fs_opt_elem[ext4_options] { // elem: union ext4_options { // noblock_validity: buffer: {6e 6f 62 6c 6f 63 6b 5f 76 61 6c // 69 64 69 74 79} (length 0x10) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // resgid: fs_opt["resgid", fmt[hex, gid]] { // name: buffer: {72 65 73 67 69 64} (length 0x6) // eq: const = 0x3d (1 bytes) // val: gid (resource) // } // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // data_writeback: buffer: {64 61 74 61 3d 77 72 69 74 65 62 61 // 63 6b} (length 0xe) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // usrjquota: buffer: {75 73 72 6a 71 75 6f 74 61 3d} (length // 0xa) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // nodelalloc: buffer: {6e 6f 64 65 6c 61 6c 6c 6f 63} (length // 0xa) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // journal_dev: fs_opt["journal_dev", fmt[hex, int32]] { // name: buffer: {6a 6f 75 72 6e 61 6c 5f 64 65 76} (length // 0xb) eq: const = 0x3d (1 bytes) val: int32 = 0x1f00 (18 // bytes) // } // } // comma: const = 0x2c (1 bytes) // } // } // common: array[fs_opt_elem[fs_options_common]] { // } // null: const = 0x0 (1 bytes) // } // } // chdir: int8 = 0xfb (1 bytes) // size: len = 0x477 (8 bytes) // img: ptr[in, buffer] { // buffer: (compressed buffer with length 0x477) // } // ] // returns fd_dir memcpy((void*)0x200000000080, "ext4\000", 5); memcpy((void*)0x200000000480, "./file0\000", 8); memcpy((void*)0x2000000001c0, "noblock_validity", 16); *(uint8_t*)0x2000000001d0 = 0x2c; memcpy((void*)0x2000000001d1, "resgid", 6); *(uint8_t*)0x2000000001d7 = 0x3d; sprintf((char*)0x2000000001d8, "0x%016llx", (long long)0); *(uint8_t*)0x2000000001ea = 0x2c; memcpy((void*)0x2000000001eb, "data=writeback", 14); *(uint8_t*)0x2000000001f9 = 0x2c; memcpy((void*)0x2000000001fa, "usrjquota=", 10); *(uint8_t*)0x200000000204 = 0x2c; memcpy((void*)0x200000000205, "nodelalloc", 10); *(uint8_t*)0x20000000020f = 0x2c; memcpy((void*)0x200000000210, "journal_dev", 11); *(uint8_t*)0x20000000021b = 0x3d; sprintf((char*)0x20000000021c, "0x%016llx", (long long)0x1f00); *(uint8_t*)0x20000000022e = 0x2c; *(uint8_t*)0x20000000022f = 0; memcpy( (void*)0x200000000dc0, "\x78\x9c\xec\xdc\xcb\x6f\x1b\xc5\x1f\x00\xf0\xef\x3a\x4e\x9a\xf4\xf1" "\x4b\x7f\xa5\x3c\x5a\x5a\x08\x14\x44\xc5\x23\x69\xd2\x07\x3d\x70\x01" "\x81\xc4\x01\x04\x12\x1c\x8a\x38\x05\x27\xad\x4a\xdd\x06\x35\x41\xa2" "\x55\x05\x85\x43\x11\xe2\x80\x2a\x71\x47\x1c\x91\xf8\x0b\x38\xc1\x05" "\x01\x27\x24\xae\x70\x47\x95\x10\xea\xa5\x85\x93\xd1\x7a\x77\x5b\xc7" "\xb5\x83\x93\x38\x71\x82\x3f\x1f\x69\xdb\x99\xdd\x75\x67\xbe\x3b\x3b" "\xf6\xec\x8c\xdd\x00\xfa\xd6\x58\xfa\x47\x12\xb1\x3d\x22\x7e\x8d\x88" "\xd1\x2c\xbb\xf8\x84\xb1\xec\xaf\x9b\xd7\x2f\x55\xfe\xba\x7e\xa9\x92" "\x44\xad\xf6\xda\x9f\x49\xfd\xbc\x1b\xd7\x2f\x55\xf2\x7f\xe2\xd6\xeb" "\xb6\x65\x3b\x6a\xb5\x3c\xbf\xa5\x45\xb9\x57\xde\x8c\x98\xae\x56\x67" "\xcf\xe7\xf9\x89\x85\xb3\xef\x4c\xcc\x5f\xb8\xf8\xd4\xe9\xb3\xd3\xa7" "\x66\x4f\xcd\x9e\x9b\x3a\x7e\xfc\xc8\xe1\xfd\x43\xc7\xa6\x8e\x76\x25" "\xce\x34\xae\x1b\x7b\xdf\x9f\xdb\xb7\xe7\xc5\x37\xae\xbe\x5c\x39\x71" "\xf5\xad\x1f\xbf\x4e\xeb\xbb\x3d\x3f\x5e\xc4\xd1\x4d\x63\xd9\xd5\x6d" "\xe9\xd1\x6e\x17\xd6\x63\x3b\x1a\xd2\x49\xb9\xcd\x49\x23\xeb\x54\x19" "\x3a\x96\xb6\x5b\xda\x5c\x83\xf5\xfe\x3f\x1a\x03\x0d\x8d\x34\x1a\x2f" "\x7c\xd4\xd3\xca\x01\x6b\xaa\x56\xab\xd5\x5a\x7d\x3e\xe7\x2e\xd7\x80" "\xff\xb0\x24\x7a\x5d\x03\xa0\x37\x8a\x0f\xfa\xf4\xf9\xb7\xd8\xd6\x69" "\xe8\xb1\x21\xfc\xf1\x6c\xf6\x00\x94\xc6\x7d\x33\xdf\xb2\x23\xe5\x28" "\xe5\xe7\x0c\x36\x3d\xdf\x76\xd3\x70\x44\x9c\xb8\xfc\xf7\x17\xe9\x16" "\x6b\x34\x0f\x01\x00\xd0\xe8\xdb\x74\xfc\xf3\x64\xab\xf1\x5f\x29\xee" "\x69\x38\xef\x7f\xf9\x1a\xca\xce\x88\xf8\x7f\x44\xec\x8a\x88\xbb\x22" "\x62\x77\x44\xdc\x1d\x51\x3f\xf7\xde\x88\xb8\x6f\x99\xe5\x37\xaf\x90" "\xdc\x39\xfe\x29\x5d\x5b\x51\x60\x1d\x4a\xc7\x7f\xcf\xe4\x6b\x5b\x8b" "\xc7\x7f\xc5\xe8\x2f\x76\x0e\xe4\xb9\x1d\xf5\xf8\x07\x93\x93\xa7\xab" "\xb3\x87\xf2\x6b\x72\x30\x06\xb7\xa4\xf9\xc9\x45\x2f\x59\xec\xbb\xe7" "\x7f\xf9\xac\x79\xdf\xa7\xf9\x34\xfb\x58\xc3\xf8\x2f\xdd\xd2\xf2\x8b" "\xb1\x60\x5e\x8f\x6b\xe5\xa6\x09\xba\x99\xe9\x85\xe9\xae\x04\x9f\xc6" "\xff\x61\xc4\xde\x72\xab\xf8\x93\x28\x96\x71\x92\x88\xd8\x13\x11\x7b" "\x57\x58\xc6\xe9\xc7\xbf\xda\xd7\xee\xd8\xbf\xc7\xbf\x84\x76\xeb\x4c" "\xcb\x50\xfb\x32\xe2\xb1\xac\xfd\x2f\x47\x53\xfc\x85\xa4\xed\xfa\xe4" "\xe4\xd3\xc7\xa6\x8e\x4e\x0c\x47\x75\xf6\xd0\x44\x71\x57\xdc\xe9\xa7" "\x9f\xaf\xbc\xda\xae\xfc\x55\xc5\xdf\x05\x69\xfb\x6f\x6d\x79\xff\x67" "\xf1\xa7\xcf\x88\xc9\x70\xc4\xfc\x85\x8b\x67\xea\xeb\xb5\xf3\xcb\x2f" "\xe3\xca\x6f\x1f\x57\x92\x36\xc7\x76\xaf\xf0\xfe\x1f\x4a\x5e\xaf\xa7" "\x87\xf2\x7d\xef\x4d\x2f\x2c\x9c\x9f\x8c\x18\x4a\x5e\x4a\xb3\x23\x8b" "\xf6\x4f\xdd\x7e\x6d\x91\x2f\xce\x4f\xe3\x3f\x78\xa0\x75\xff\xdf\x95" "\x3d\x9e\xd5\xaf\xc4\xfd\x11\x91\xde\xc4\xfb\x23\xe2\x81\x88\x78\x30" "\x6f\xbb\x87\x22\xe2\xe1\x88\x38\xb0\x44\xfc\x3f\x3c\xf7\xc8\xdb\xed" "\x8e\xb5\x6f\xff\x25\x66\xe5\xbb\x28\x8d\x7f\x66\x89\xf6\x4f\xdf\xf2" "\xd2\xd4\xed\xf6\x5f\x7e\x62\xe0\xcc\xf7\xdf\xb4\x2b\xbf\xd6\x51\xfb" "\x1f\xa9\xa7\x0e\xe6\x7b\x3a\x79\xff\xeb\xb4\x82\xab\xb9\x76\x00\x00" "\x00\xb0\x59\x94\xea\xdf\x81\x4f\x4a\xe3\xb7\xd2\xa5\xd2\xf8\x78\xf6" "\x1d\xfe\xdd\xb1\xb5\x54\x9d\x9b\x5f\x78\xe2\xe4\xdc\xbb\xe7\x66\xb2" "\xef\xca\xef\x8c\xc1\x52\x31\xd3\x35\xda\x30\x1f\x3a\x99\xcf\x0d\x17" "\xf9\xa9\xa6\xfc\xe1\x7c\xde\xf8\xf3\x81\x91\x7a\x7e\xbc\x32\x57\x9d" "\xe9\x75\xf0\xd0\xe7\xb6\xb5\xe9\xff\xa9\xdf\x07\x7a\x5d\x3b\x60\xcd" "\x75\x61\x1d\x0d\xd8\xa4\xf4\x7f\xe8\x5f\xfa\x3f\xf4\x2f\xfd\x1f\xfa" "\x97\xfe\x0f\x7d\x6a\xa8\xf5\xee\x0f\xd6\xbb\x1e\x40\x4f\x2c\xff\xf3" "\x7f\x78\x4d\xea\x01\xac\x3f\xe3\x7f\xe8\x5f\xfa\x3f\xf4\x2f\xfd\x1f" "\xfa\x52\xdb\xdf\xc6\x97\x56\xf5\x93\xff\xcd\x9a\x28\x6f\x8c\x6a\xb4" "\x4c\x8c\x6c\x8c\x6a\x14\x89\x28\x6d\x88\x6a\x74\x2f\xf1\xca\x27\x59" "\x97\xd8\x28\xf5\x29\x12\xe5\x8e\xff\x33\x8b\x15\x26\xb6\xb4\x3c\xd4" "\xeb\x77\x26\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\xee\xf8\x27\x00\x00\xff\xff" "\x1a\xd6\xe6\x7f", 1143); syz_mount_image(/*fs=*/0x200000000080, /*dir=*/0x200000000480, /*flags=MS_STRICTATIME|MS_SILENT|MS_NOSUID*/ 0x1008002, /*opts=*/0x2000000001c0, /*chdir=*/0xfb, /*size=*/0x477, /*img=*/0x200000000dc0); break; case 1: // syz_mount_image$ext4 arguments: [ // fs: ptr[in, buffer] { // buffer: {65 78 74 34 00} (length 0x5) // } // dir: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8) // } // flags: mount_flags = 0x1008002 (8 bytes) // opts: ptr[in, fs_options[ext4_options]] { // fs_options[ext4_options] { // elems: array[fs_opt_elem[ext4_options]] { // fs_opt_elem[ext4_options] { // elem: union ext4_options { // noblock_validity: buffer: {6e 6f 62 6c 6f 63 6b 5f 76 61 6c // 69 64 69 74 79} (length 0x10) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // resgid: fs_opt["resgid", fmt[hex, gid]] { // name: buffer: {72 65 73 67 69 64} (length 0x6) // eq: const = 0x3d (1 bytes) // val: gid (resource) // } // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // data_writeback: buffer: {64 61 74 61 3d 77 72 69 74 65 62 61 // 63 6b} (length 0xe) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // usrjquota: buffer: {75 73 72 6a 71 75 6f 74 61 3d} (length // 0xa) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // nodelalloc: buffer: {6e 6f 64 65 6c 61 6c 6c 6f 63} (length // 0xa) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // journal_dev: fs_opt["journal_dev", fmt[hex, int32]] { // name: buffer: {6a 6f 75 72 6e 61 6c 5f 64 65 76} (length // 0xb) eq: const = 0x3d (1 bytes) val: int32 = 0x1f00 (18 // bytes) // } // } // comma: const = 0x2c (1 bytes) // } // } // common: array[fs_opt_elem[fs_options_common]] { // } // null: const = 0x0 (1 bytes) // } // } // chdir: int8 = 0xfb (1 bytes) // size: len = 0x477 (8 bytes) // img: ptr[in, buffer] { // buffer: (compressed buffer with length 0x477) // } // ] // returns fd_dir memcpy((void*)0x200000000080, "ext4\000", 5); memcpy((void*)0x200000000480, "./file0\000", 8); memcpy((void*)0x2000000001c0, "noblock_validity", 16); *(uint8_t*)0x2000000001d0 = 0x2c; memcpy((void*)0x2000000001d1, "resgid", 6); *(uint8_t*)0x2000000001d7 = 0x3d; sprintf((char*)0x2000000001d8, "0x%016llx", (long long)0); *(uint8_t*)0x2000000001ea = 0x2c; memcpy((void*)0x2000000001eb, "data=writeback", 14); *(uint8_t*)0x2000000001f9 = 0x2c; memcpy((void*)0x2000000001fa, "usrjquota=", 10); *(uint8_t*)0x200000000204 = 0x2c; memcpy((void*)0x200000000205, "nodelalloc", 10); *(uint8_t*)0x20000000020f = 0x2c; memcpy((void*)0x200000000210, "journal_dev", 11); *(uint8_t*)0x20000000021b = 0x3d; sprintf((char*)0x20000000021c, "0x%016llx", (long long)0x1f00); *(uint8_t*)0x20000000022e = 0x2c; *(uint8_t*)0x20000000022f = 0; memcpy( (void*)0x200000000dc0, "\x78\x9c\xec\xdc\xcb\x6f\x1b\xc5\x1f\x00\xf0\xef\x3a\x4e\x9a\xf4\xf1" "\x4b\x7f\xa5\x3c\x5a\x5a\x08\x14\x44\xc5\x23\x69\xd2\x07\x3d\x70\x01" "\x81\xc4\x01\x04\x12\x1c\x8a\x38\x05\x27\xad\x4a\xdd\x06\x35\x41\xa2" "\x55\x05\x85\x43\x11\xe2\x80\x2a\x71\x47\x1c\x91\xf8\x0b\x38\xc1\x05" "\x01\x27\x24\xae\x70\x47\x95\x10\xea\xa5\x85\x93\xd1\x7a\x77\x5b\xc7" "\xb5\x83\x93\x38\x71\x82\x3f\x1f\x69\xdb\x99\xdd\x75\x67\xbe\x3b\x3b" "\xf6\xec\x8c\xdd\x00\xfa\xd6\x58\xfa\x47\x12\xb1\x3d\x22\x7e\x8d\x88" "\xd1\x2c\xbb\xf8\x84\xb1\xec\xaf\x9b\xd7\x2f\x55\xfe\xba\x7e\xa9\x92" "\x44\xad\xf6\xda\x9f\x49\xfd\xbc\x1b\xd7\x2f\x55\xf2\x7f\xe2\xd6\xeb" "\xb6\x65\x3b\x6a\xb5\x3c\xbf\xa5\x45\xb9\x57\xde\x8c\x98\xae\x56\x67" "\xcf\xe7\xf9\x89\x85\xb3\xef\x4c\xcc\x5f\xb8\xf8\xd4\xe9\xb3\xd3\xa7" "\x66\x4f\xcd\x9e\x9b\x3a\x7e\xfc\xc8\xe1\xfd\x43\xc7\xa6\x8e\x76\x25" "\xce\x34\xae\x1b\x7b\xdf\x9f\xdb\xb7\xe7\xc5\x37\xae\xbe\x5c\x39\x71" "\xf5\xad\x1f\xbf\x4e\xeb\xbb\x3d\x3f\x5e\xc4\xd1\x4d\x63\xd9\xd5\x6d" "\xe9\xd1\x6e\x17\xd6\x63\x3b\x1a\xd2\x49\xb9\xcd\x49\x23\xeb\x54\x19" "\x3a\x96\xb6\x5b\xda\x5c\x83\xf5\xfe\x3f\x1a\x03\x0d\x8d\x34\x1a\x2f" "\x7c\xd4\xd3\xca\x01\x6b\xaa\x56\xab\xd5\x5a\x7d\x3e\xe7\x2e\xd7\x80" "\xff\xb0\x24\x7a\x5d\x03\xa0\x37\x8a\x0f\xfa\xf4\xf9\xb7\xd8\xd6\x69" "\xe8\xb1\x21\xfc\xf1\x6c\xf6\x00\x94\xc6\x7d\x33\xdf\xb2\x23\xe5\x28" "\xe5\xe7\x0c\x36\x3d\xdf\x76\xd3\x70\x44\x9c\xb8\xfc\xf7\x17\xe9\x16" "\x6b\x34\x0f\x01\x00\xd0\xe8\xdb\x74\xfc\xf3\x64\xab\xf1\x5f\x29\xee" "\x69\x38\xef\x7f\xf9\x1a\xca\xce\x88\xf8\x7f\x44\xec\x8a\x88\xbb\x22" "\x62\x77\x44\xdc\x1d\x51\x3f\xf7\xde\x88\xb8\x6f\x99\xe5\x37\xaf\x90" "\xdc\x39\xfe\x29\x5d\x5b\x51\x60\x1d\x4a\xc7\x7f\xcf\xe4\x6b\x5b\x8b" "\xc7\x7f\xc5\xe8\x2f\x76\x0e\xe4\xb9\x1d\xf5\xf8\x07\x93\x93\xa7\xab" "\xb3\x87\xf2\x6b\x72\x30\x06\xb7\xa4\xf9\xc9\x45\x2f\x59\xec\xbb\xe7" "\x7f\xf9\xac\x79\xdf\xa7\xf9\x34\xfb\x58\xc3\xf8\x2f\xdd\xd2\xf2\x8b" "\xb1\x60\x5e\x8f\x6b\xe5\xa6\x09\xba\x99\xe9\x85\xe9\xae\x04\x9f\xc6" "\xff\x61\xc4\xde\x72\xab\xf8\x93\x28\x96\x71\x92\x88\xd8\x13\x11\x7b" "\x57\x58\xc6\xe9\xc7\xbf\xda\xd7\xee\xd8\xbf\xc7\xbf\x84\x76\xeb\x4c" "\xcb\x50\xfb\x32\xe2\xb1\xac\xfd\x2f\x47\x53\xfc\x85\xa4\xed\xfa\xe4" "\xe4\xd3\xc7\xa6\x8e\x4e\x0c\x47\x75\xf6\xd0\x44\x71\x57\xdc\xe9\xa7" "\x9f\xaf\xbc\xda\xae\xfc\x55\xc5\xdf\x05\x69\xfb\x6f\x6d\x79\xff\x67" "\xf1\xa7\xcf\x88\xc9\x70\xc4\xfc\x85\x8b\x67\xea\xeb\xb5\xf3\xcb\x2f" "\xe3\xca\x6f\x1f\x57\x92\x36\xc7\x76\xaf\xf0\xfe\x1f\x4a\x5e\xaf\xa7" "\x87\xf2\x7d\xef\x4d\x2f\x2c\x9c\x9f\x8c\x18\x4a\x5e\x4a\xb3\x23\x8b" "\xf6\x4f\xdd\x7e\x6d\x91\x2f\xce\x4f\xe3\x3f\x78\xa0\x75\xff\xdf\x95" "\x3d\x9e\xd5\xaf\xc4\xfd\x11\x91\xde\xc4\xfb\x23\xe2\x81\x88\x78\x30" "\x6f\xbb\x87\x22\xe2\xe1\x88\x38\xb0\x44\xfc\x3f\x3c\xf7\xc8\xdb\xed" "\x8e\xb5\x6f\xff\x25\x66\xe5\xbb\x28\x8d\x7f\x66\x89\xf6\x4f\xdf\xf2" "\xd2\xd4\xed\xf6\x5f\x7e\x62\xe0\xcc\xf7\xdf\xb4\x2b\xbf\xd6\x51\xfb" "\x1f\xa9\xa7\x0e\xe6\x7b\x3a\x79\xff\xeb\xb4\x82\xab\xb9\x76\x00\x00" "\x00\xb0\x59\x94\xea\xdf\x81\x4f\x4a\xe3\xb7\xd2\xa5\xd2\xf8\x78\xf6" "\x1d\xfe\xdd\xb1\xb5\x54\x9d\x9b\x5f\x78\xe2\xe4\xdc\xbb\xe7\x66\xb2" "\xef\xca\xef\x8c\xc1\x52\x31\xd3\x35\xda\x30\x1f\x3a\x99\xcf\x0d\x17" "\xf9\xa9\xa6\xfc\xe1\x7c\xde\xf8\xf3\x81\x91\x7a\x7e\xbc\x32\x57\x9d" "\xe9\x75\xf0\xd0\xe7\xb6\xb5\xe9\xff\xa9\xdf\x07\x7a\x5d\x3b\x60\xcd" "\x75\x61\x1d\x0d\xd8\xa4\xf4\x7f\xe8\x5f\xfa\x3f\xf4\x2f\xfd\x1f\xfa" "\x97\xfe\x0f\x7d\x6a\xa8\xf5\xee\x0f\xd6\xbb\x1e\x40\x4f\x2c\xff\xf3" "\x7f\x78\x4d\xea\x01\xac\x3f\xe3\x7f\xe8\x5f\xfa\x3f\xf4\x2f\xfd\x1f" "\xfa\x52\xdb\xdf\xc6\x97\x56\xf5\x93\xff\xcd\x9a\x28\x6f\x8c\x6a\xb4" "\x4c\x8c\x6c\x8c\x6a\x14\x89\x28\x6d\x88\x6a\x74\x2f\xf1\xca\x27\x59" "\x97\xd8\x28\xf5\x29\x12\xe5\x8e\xff\x33\x8b\x15\x26\xb6\xb4\x3c\xd4" "\xeb\x77\x26\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x80\xee\xf8\x27\x00\x00\xff\xff" "\x1a\xd6\xe6\x7f", 1143); syz_mount_image(/*fs=*/0x200000000080, /*dir=*/0x200000000480, /*flags=MS_STRICTATIME|MS_SILENT|MS_NOSUID*/ 0x1008002, /*opts=*/0x2000000001c0, /*chdir=*/0xfb, /*size=*/0x477, /*img=*/0x200000000dc0); break; case 2: // sendmsg$nl_route arguments: [ // fd: sock_nl_route (resource) // msg: nil // f: send_flags = 0x40000 (8 bytes) // ] syscall(__NR_sendmsg, /*fd=*/(intptr_t)-1, /*msg=*/0ul, /*f=MSG_BATCH*/ 0x40000ul); break; } } int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x200001000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); const char* reason; (void)reason; loop(); return 0; }