// https://syzkaller.appspot.com/bug?id=d98382896eb4cb82f66ac6a806a39e2823b76d90 // 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 #ifndef __NR_ioctl #define __NR_ioctl 29 #endif #ifndef __NR_memfd_create #define __NR_memfd_create 279 #endif #ifndef __NR_mmap #define __NR_mmap 222 #endif #ifndef __NR_openat #define __NR_openat 56 #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; } } //% 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; } 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 loop(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); 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); } uint64_t r[1] = {0xffffffffffffffff}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: // syz_mount_image$vfat arguments: [ // fs: ptr[in, buffer] { // buffer: {76 66 61 74 00} (length 0x5) // } // dir: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8) // } // flags: mount_flags = 0x800 (8 bytes) // opts: ptr[in, fs_options[vfat_options]] { // fs_options[vfat_options] { // elems: array[fs_opt_elem[vfat_options]] { // fs_opt_elem[vfat_options] { // elem: union vfat_options { // iocharset: fs_opt["iocharset", stringnoz[codepages_names]] { // name: buffer: {69 6f 63 68 61 72 73 65 74} (length 0x9) // eq: const = 0x3d (1 bytes) // val: buffer: {61 73 63 69 69} (length 0x5) // } // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[vfat_options] { // elem: union vfat_options { // shortname_win95: buffer: {73 68 6f 72 74 6e 61 6d 65 3d 77 // 69 6e 39 35} (length 0xf) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[vfat_options] { // elem: union vfat_options { // shortname_lower: buffer: {73 68 6f 72 74 6e 61 6d 65 3d 6c // 6f 77 65 72} (length 0xf) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[vfat_options] { // elem: union vfat_options { // uni_xlateno: buffer: {75 6e 69 5f 78 6c 61 74 65 3d 30} // (length 0xb) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[vfat_options] { // elem: union vfat_options { // fat: union fat_options { // codepage: fs_opt["codepage", stringnoz[codepage_nums]] { // name: buffer: {63 6f 64 65 70 61 67 65} (length 0x8) // eq: const = 0x3d (1 bytes) // val: buffer: {38 36 35} (length 0x3) // } // } // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[vfat_options] { // elem: union vfat_options { // uni_xlateno: buffer: {75 6e 69 5f 78 6c 61 74 65 3d 30} // (length 0xb) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[vfat_options] { // elem: union vfat_options { // fat: union fat_options { // check_strict: buffer: {63 68 65 63 6b 3d 73 74 72 69 63 // 74} (length 0xc) // } // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[vfat_options] { // elem: union vfat_options { // numtail: buffer: {6e 6f 6e 75 6d 74 61 69 6c 3d 30} (length // 0xb) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[vfat_options] { // elem: union vfat_options { // fat: union fat_options { // allow_utime: fs_opt["allow_utime", fmt[oct, int32]] { // name: buffer: {61 6c 6c 6f 77 5f 75 74 69 6d 65} (length // 0xb) eq: const = 0x3d (1 bytes) val: int32 = 0x81 (23 // bytes) // } // } // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[vfat_options] { // elem: union vfat_options { // iocharset: fs_opt["iocharset", stringnoz[codepages_names]] { // name: buffer: {69 6f 63 68 61 72 73 65 74} (length 0x9) // eq: const = 0x3d (1 bytes) // val: buffer: {69 73 6f 38 38 35 39 2d 34} (length 0x9) // } // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[vfat_options] { // elem: union vfat_options { // rodir: buffer: {72 6f 64 69 72} (length 0x5) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[vfat_options] { // elem: union vfat_options { // uni_xlate: buffer: {75 6e 69 5f 78 6c 61 74 65 3d 31} // (length 0xb) // } // comma: const = 0x2c (1 bytes) // } // } // common: array[fs_opt_elem[fs_options_common]] { // } // null: const = 0x0 (1 bytes) // } // } // chdir: int8 = 0x41 (1 bytes) // size: len = 0x282 (8 bytes) // img: ptr[in, buffer] { // buffer: (compressed buffer with length 0x282) // } // ] // returns fd_dir memcpy((void*)0x20000040, "vfat\000", 5); memcpy((void*)0x200000c0, "./file0\000", 8); memcpy((void*)0x20000140, "iocharset", 9); *(uint8_t*)0x20000149 = 0x3d; memcpy((void*)0x2000014a, "ascii", 5); *(uint8_t*)0x2000014f = 0x2c; memcpy((void*)0x20000150, "shortname=win95", 15); *(uint8_t*)0x2000015f = 0x2c; memcpy((void*)0x20000160, "shortname=lower", 15); *(uint8_t*)0x2000016f = 0x2c; memcpy((void*)0x20000170, "uni_xlate=0", 11); *(uint8_t*)0x2000017b = 0x2c; memcpy((void*)0x2000017c, "codepage", 8); *(uint8_t*)0x20000184 = 0x3d; memcpy((void*)0x20000185, "865", 3); *(uint8_t*)0x20000188 = 0x2c; memcpy((void*)0x20000189, "uni_xlate=0", 11); *(uint8_t*)0x20000194 = 0x2c; memcpy((void*)0x20000195, "check=strict", 12); *(uint8_t*)0x200001a1 = 0x2c; memcpy((void*)0x200001a2, "nonumtail=0", 11); *(uint8_t*)0x200001ad = 0x2c; memcpy((void*)0x200001ae, "allow_utime", 11); *(uint8_t*)0x200001b9 = 0x3d; sprintf((char*)0x200001ba, "%023llo", (long long)0x81); *(uint8_t*)0x200001d1 = 0x2c; memcpy((void*)0x200001d2, "iocharset", 9); *(uint8_t*)0x200001db = 0x3d; memcpy((void*)0x200001dc, "iso8859-4", 9); *(uint8_t*)0x200001e5 = 0x2c; memcpy((void*)0x200001e6, "rodir", 5); *(uint8_t*)0x200001eb = 0x2c; memcpy((void*)0x200001ec, "uni_xlate=1", 11); *(uint8_t*)0x200001f7 = 0x2c; *(uint8_t*)0x200001f8 = 0; memcpy( (void*)0x200004c0, "\x78\x9c\xec\xdd\xb1\x6a\x5b\x57\x18\x07\xf0\x4f\xb6\x5c\xc9\x86\x22" "\x0d\x05\xd3\x52\xe8\x2d\x5d\x3a\x09\xdb\xc5\xbb\x4c\x71\xa1\x54\xd0" "\xd2\xa2\xa1\x9d\x6a\x62\x9b\x04\xcb\x31\xc4\x60\x48\x06\xdb\x9b\xc9" "\x3b\x24\xaf\x90\x8c\x59\x03\x19\x42\xd6\xbc\x40\x08\x04\x27\x90\x25" "\xce\xe4\x21\xa0\xa0\x5c\x59\x91\x1c\x49\xb1\x9c\x48\x32\xe4\xf7\x5b" "\xfc\x71\xcf\xf9\xeb\x9e\x73\x7c\xb8\x17\x0f\x3e\xfa\xff\xfb\xcd\x8d" "\xd5\xad\xed\xf5\xa3\xa3\xc3\xc8\xe7\x33\x91\x2d\x47\x39\x8e\x33\x51" "\x8c\x89\x98\x8c\xd4\x7e\x74\x95\xe9\x7e\x19\x00\xb8\xe8\x8e\xeb\xf5" "\x78\x55\x4f\x8d\x7b\x2c\x00\xc0\x68\x78\xff\x03\xc0\x97\xa7\xdf\xfb" "\x3f\xb3\xdf\xba\xf6\xd7\xe8\x47\x06\x00\x0c\xcb\x27\xfd\xfd\x3f\x31" "\x94\x21\x01\x00\x43\xf6\xcf\xbf\xff\xfd\xb1\x54\xa9\x2c\xff\x9d\x24" "\xf9\x88\xcd\x83\x9d\xea\x4e\x35\xfd\x99\xb6\x2f\xad\xc7\x95\xa8\xc5" "\x5a\xcc\x45\x21\xde\x44\xd4\x5b\xd2\xfa\xb7\xdf\x2b\xcb\x73\x49\xc3" "\xf3\x62\xe4\x37\xf7\x26\xd2\xfc\xde\x4e\x75\xb2\x33\x3f\x1f\x85\x28" "\x76\xcf\xcf\x27\xa9\xa8\x36\x72\x27\xf9\xa9\x98\x69\xe6\x9f\xcc\xc4" "\x5a\x2c\x44\x21\xbe\xe9\x9e\x5f\xe8\x9a\xff\x2a\x7e\xfe\xa9\xed\xfe" "\xa5\x28\xc4\xe3\x4b\xb1\x15\xb5\x58\x8d\x46\x36\xcd\xe7\x22\x62\x77" "\x3e\x49\x7e\xfd\xb3\xd2\x58\x80\xa6\x46\x3e\xf7\xae\x1f\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x0c\x43\x29" "\x69\x29\x76\x9e\x9f\x93\x9e\xdf\x53\x2a\xf5\x6a\x4f\xf3\xed\xe7\x03" "\x4d\xf7\x3b\x1f\xa8\xbe\x77\xea\x7c\x9e\x6c\x7c\x97\x1d\xef\xdc\x01" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xe0\xa2\xd8" "\xbe\x7e\x63\x63\xa5\x56\x5b\xbb\xd6\xaf\xb8\xfa\xe8\xce\x83\xc3\x5c" "\x1a\xf8\x68\xe7\xfe\x45\xa6\x79\xdf\xc1\x52\x07\x7d\xfb\x4c\x9f\x9e" "\x45\x3e\x22\x16\x23\xa2\x6f\xea\xeb\x1f\x9f\xdd\xea\xd6\x94\x8b\xdc" "\x99\xd6\xe7\x64\x26\xe7\x5e\x8d\xa9\x53\x23\x4c\x9a\x1f\x78\xff\x87" "\xf3\x2f\xef\xc8\x8a\x87\x87\x97\xbf\xfd\x65\x7b\x76\xb1\xad\xa9\xd2" "\xbe\x37\x22\xdb\x9e\xba\xd9\x98\x6a\xc7\xe7\xf4\xd8\x48\xd9\xb3\x6d" "\xc8\xc1\x8b\x97\x85\x88\x9e\x7d\xf2\x03\x6f\xc8\xf6\xe2\xee\x49\x51" "\x7e\xfd\x41\x9f\x5c\x6b\x93\x4c\x8f\xfb\x17\x37\x7b\xbb\xbc\x72\x6f" "\xf7\xe9\x8b\xb3\xa6\xfa\x3c\x34\xea\x93\x9f\xfb\x31\x04\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x74\xfc\x7f\x7b\xef\x3e" "\x8b\xa3\x1c\x10\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x8c\xc1\xfb\xef\xff\x1f\xb4\xc8\x45\xc7\x95\x7c\xcf\xce\xfb\xe3" "\x9e\x23\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\xbc\x0d\x00\x00\xff\xff\x26\x6d\x8b\x40", 642); syz_mount_image(/*fs=*/0x20000040, /*dir=*/0x200000c0, /*flags=MS_NODIRATIME*/ 0x800, /*opts=*/0x20000140, /*chdir=*/0x41, /*size=*/0x282, /*img=*/0x200004c0); break; case 1: // openat arguments: [ // fd: fd_dir (resource) // file: ptr[in, buffer] { // buffer: {2e 00} (length 0x2) // } // flags: open_flags = 0x0 (4 bytes) // mode: open_mode = 0x0 (2 bytes) // ] // returns fd memcpy((void*)0x20000040, ".\000", 2); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000040ul, /*flags=*/0, /*mode=*/0); if (res != -1) r[0] = res; break; case 2: // ioctl$FAT_IOCTL_GET_ATTRIBUTES arguments: [ // fd: fd (resource) // cmd: const = 0x80047210 (4 bytes) // arg: nil // ] syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x80047210, /*arg=*/0ul); break; } } int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-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=*/(intptr_t)-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x21000000ul, /*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; }