// https://syzkaller.appspot.com/bug?id=e16a8f6ab953c839cf615efb6da92676cc397585 // 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_memfd_create #define __NR_memfd_create 279 #endif #ifndef __NR_mmap #define __NR_mmap 222 #endif #ifndef __NR_name_to_handle_at #define __NR_name_to_handle_at 264 #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 < 2; 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); } void execute_call(int call) { 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 31 00} (length 0x8) // } // flags: mount_flags = 0x1 (8 bytes) // opts: ptr[inout, array[ANYUNION]] { // array[ANYUNION] { // union ANYUNION { // ANYBLOB: buffer: {75 6e 69 5f 78 6c 61 74 65 3d 30 2c 73 68 6f // 72 74 6e 61 6d 65 3d 77 69 6e 39 35 2c 73 68 6f 72 74 6e 61 6d // 65 3d 77 69 6e 6e 74 2c 75 6e 69 5f 78 6c 61 74 65 3d 31 2c 73 // 68 6f 72 74 6e 61 6d 65 3d 6c 6f 77 65 72 2c 73 68 6f 72 74 6e // 61 6d 65 3d 6c 6f 77 65 72 2c 72 6f 64 69 72 2c 75 74 66 38 3d // 31 2c 6e 66 73 3d 6e 6f 73 74 61 6c 65 5f 72 6f 2c 75 69 64 3d} // (length 0x78) // } // union ANYUNION { // ANYRESHEX: ANYRES64 (resource) // } // union ANYUNION { // ANYBLOB: buffer: {2c 73 68 6f 72 74 6e 61 6d 65 3d 77 69 6e 6e // 74 2c 75 6e 69 5f 78 6c 61 74 65 3d 30 2c 73 79 73 5f 69 6d 6d // 75 74 61 62 6c 65 2c 69 6f 63 68 61 72 73 65 74 3d 61 73 63 69 // 69 2c 66 6d 61 73 6b 3d 30 30 30 30 30 30 30 30 30 30 30 30 30 // 30 30 30 30 30 30 31 37 37 37 2c 73 68 6f 72 74 6e 61 6d 65 3d // 6c 6f 77 65 72 2c 73 68 6f 72 74 6e 61 6d 65 3d 6c 6f 77 65 72 // 2c 73 6d 61 63 6b 66 73 66 6c 6f 6f 72 3d 73 68 6f 72 74 6e 61 // 6d 65 3d 6c 6f 77 65 72 2c 66 75 6e 63 3d 46 49 4c 45 5f 4d 4d // 41 50 2c 00 58 a0 17 66 68 22 a0 96 4b a9 29 ec 69 fb 77 5c 0c // a6 18 3e de 26 af 80 c1 d6 b7 e4 51 8e 18 79 b3 76 51 02 30 8c // 53 81 38 ce 14 94 a2 2e 64 1b} (length 0xd6) // } // } // } // chdir: int8 = 0x0 (1 bytes) // size: len = 0x2b0 (8 bytes) // img: ptr[in, buffer] { // buffer: (compressed buffer with length 0x2b0) // } // ] // returns fd_dir memcpy((void*)0x20003880, "vfat\000", 5); memcpy((void*)0x20000000, "./file1\000", 8); memcpy((void*)0x200061c0, "uni_xlate=0,shortname=win95,shortname=winnt,uni_xlate=1,shortname=" "lower,shortname=lower,rodir,utf8=1,nfs=nostale_ro,uid=", 120); sprintf((char*)0x20006238, "0x%016llx", (long long)0); memcpy( (void*)0x2000624a, "\x2c\x73\x68\x6f\x72\x74\x6e\x61\x6d\x65\x3d\x77\x69\x6e\x6e\x74\x2c" "\x75\x6e\x69\x5f\x78\x6c\x61\x74\x65\x3d\x30\x2c\x73\x79\x73\x5f\x69" "\x6d\x6d\x75\x74\x61\x62\x6c\x65\x2c\x69\x6f\x63\x68\x61\x72\x73\x65" "\x74\x3d\x61\x73\x63\x69\x69\x2c\x66\x6d\x61\x73\x6b\x3d\x30\x30\x30" "\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x30\x31" "\x37\x37\x37\x2c\x73\x68\x6f\x72\x74\x6e\x61\x6d\x65\x3d\x6c\x6f\x77" "\x65\x72\x2c\x73\x68\x6f\x72\x74\x6e\x61\x6d\x65\x3d\x6c\x6f\x77\x65" "\x72\x2c\x73\x6d\x61\x63\x6b\x66\x73\x66\x6c\x6f\x6f\x72\x3d\x73\x68" "\x6f\x72\x74\x6e\x61\x6d\x65\x3d\x6c\x6f\x77\x65\x72\x2c\x66\x75\x6e" "\x63\x3d\x46\x49\x4c\x45\x5f\x4d\x4d\x41\x50\x2c\x00\x58\xa0\x17\x66" "\x68\x22\xa0\x96\x4b\xa9\x29\xec\x69\xfb\x77\x5c\x0c\xa6\x18\x3e\xde" "\x26\xaf\x80\xc1\xd6\xb7\xe4\x51\x8e\x18\x79\xb3\x76\x51\x02\x30\x8c" "\x53\x81\x38\xce\x14\x94\xa2\x2e\x64\x1b", 214); memcpy( (void*)0x20000140, "\x78\x9c\xec\xdd\x3f\x6b\x3b\x75\x1c\x07\xf0\xcf\xa5\x69\x12\x75\x48" "\x66\x11\xbc\xc1\xf9\x47\xdb\xd5\x25\x1d\x5a\x10\x3b\x29\x1d\x74\xd1" "\x62\x5b\x28\x4d\x10\x5a\x28\x54\xc4\xb4\x93\xab\x4f\xc0\x47\x20\x08" "\xae\x3e\x07\x17\x9f\x81\xe0\x2a\x38\x16\x2c\x9c\x5c\xee\xae\x69\xfe" "\x9d\x56\x9a\xd6\x1f\x7d\xbd\x96\x7e\xfa\xbd\xef\xfb\xbe\x7f\x7a\x21" "\x43\xc9\x37\x9f\xbf\x33\x3c\x3d\x4c\xe3\xf8\xfa\xeb\xdf\xa2\xd3\x49" "\xa2\xd1\x8f\x7e\xdc\x24\xd1\x8b\x46\x54\xae\x62\x4a\xff\xbb\x00\x00" "\x5e\x67\x37\x59\x16\x7f\x66\x85\x87\xe4\x92\x88\xe8\xac\x6e\x5a\x00" "\xc0\x0a\xcd\xbd\xff\x27\x49\x7d\xe0\xa7\xa7\x99\x17\x00\xb0\x3a\x1f" "\x7f\xf2\xe9\x87\xdb\x7b\x7b\x3b\x1f\xa5\x69\x27\x76\x87\xdf\x5e\xec" "\xe7\xef\xff\xf9\xcf\xe2\xfa\xf6\x71\x9c\xc4\x20\x8e\x62\x23\xba\x71" "\x1b\x91\xdd\x29\xea\xdd\x2c\xcb\x46\xcd\x34\xd7\x8b\xf7\x86\xa3\x8b" "\xfd\x3c\x39\xfc\xec\x97\xf2\xfe\xdb\x7f\x44\x8c\xf3\x9b\xd1\x8d\xde" "\xb8\x69\x3a\xff\xc1\xde\xce\x66\x5a\xb8\x97\x1f\xe5\xf3\x78\xb3\x1c" "\xbf\x9f\xe7\xb7\xa2\x1b\x7f\x4d\x8d\x5f\xfd\x83\x62\x67\x6b\x2e\x1f" "\x11\xcd\xde\xf4\xfc\x5f\x45\x37\x7e\xfd\x22\xbe\x8c\x41\x1c\x8e\x27" "\x31\x19\xff\x9b\xcd\x34\x3d\xf9\xb9\xda\x91\x3c\x9f\x8c\x2e\xf6\xdb" "\xe3\x7e\x13\xd9\xda\x13\xfc\x39\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x78\x21\x5e\x95\x67\xe7\xb4\x63\x7c" "\x7e\x4f\xde\x54\x9e\xbf\xb3\x76\x9b\xff\xb2\x1e\x69\xa5\x37\x7d\x3e" "\x4f\x91\xbf\x3b\x2d\x70\xe6\x7c\xa0\x51\x16\xdf\x57\xe7\xeb\x6c\xa4" "\x69\x9a\x95\x1d\x27\xf9\x66\xbc\xdd\x8c\xe6\xf3\xac\x1a\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xfe\x5f\xce\x2f\xbf" "\x3a\x3d\x18\x0c\x8e\xce\x1e\xa5\xa8\x4e\x03\xa8\x3e\xd6\xff\x5f\xef" "\xd3\xbf\xd7\xf2\x6e\x2c\xed\x9c\x0f\x73\xd0\x9e\x8c\xd5\x28\xcb\x9a" "\x3b\xc7\x5a\xd5\x27\x89\xa8\x9d\x46\xbe\x88\x47\xda\x96\xfa\xe2\xea" "\xf2\x8d\x65\x73\xfe\xe1\xc7\x9a\x78\x67\x51\xaa\xf3\xcf\x83\xae\xd7" "\xed\xcf\xe3\x14\xd5\xd3\x75\x7a\x90\x14\x7b\x98\xcc\xf4\x69\xc7\x64" "\x15\x45\x11\x8d\xfb\x0f\x64\x2b\xce\xce\xb3\x7f\x33\x56\x6b\xd9\xa5" "\xec\x41\x8f\x5f\x6b\xe1\xa5\xee\x83\xd7\xde\x7a\x6b\x5c\x8c\x6a\xfa" "\x44\x52\x37\xb1\xf7\x7f\x2f\xb6\xa1\x6c\x49\x66\x57\xd1\x1a\xef\xea" "\xc2\xf8\x7a\x59\x94\xf1\xc6\xdc\xd3\xdb\xc9\x5b\x5a\xcb\xe2\x73\xaf" "\x94\x29\xf9\xab\x2c\x71\x5a\x07\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\xac\xd4\xe4\x43\xbf\x0b\x2e\x5e\xd7\x46\x1b\x59" "\x7b\x65\xd3\x02\x00\x00\x00\x00\x00\x00\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\x27\x35\xf9\xfe\xff\xbb\xa2\x11\xb3\x2d\xb3\xc5\xa8\x0c\xd7\xf5" "\x29\x8b\x56\x9c\x9d\x3f\xf3\x12\x01\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x78\x01\xfe\x0e" "\x00\x00\xff\xff\xeb\x0f\x50\x72", 688); syz_mount_image(/*fs=*/0x20003880, /*dir=*/0x20000000, /*flags=MS_RDONLY*/ 1, /*opts=*/0x200061c0, /*chdir=*/0, /*size=*/0x2b0, /*img=*/0x20000140); break; case 1: // name_to_handle_at arguments: [ // fd: fd_dir (resource) // file: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8) // } // handle: ptr[in, file_handle] { // union file_handle { // FILEID_INO32_GEN: file_handle_t[FILEID_INO32_GEN, // fid_FILEID_INO32_GEN] { // handle_bytes: bytesize = 0x8 (4 bytes) // handle_type: const = 0x1 (4 bytes) // f_handle: fid_FILEID_INO32_GEN { // ino: int32 = 0x3 (4 bytes) // gen: int32 = 0x4 (4 bytes) // } // } // } // } // mnt: nil // flags: name_to_handle_at_flags = 0x0 (8 bytes) // ] memcpy((void*)0x20000080, "./file1\000", 8); *(uint32_t*)0x200000c0 = 8; *(uint32_t*)0x200000c4 = 1; *(uint32_t*)0x200000c8 = 3; *(uint32_t*)0x200000cc = 4; syscall(__NR_name_to_handle_at, /*fd=*/0xffffff9c, /*file=*/0x20000080ul, /*handle=*/0x200000c0ul, /*mnt=*/0ul, /*flags=*/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; }