// https://syzkaller.appspot.com/bug?id=d4a58de9696a60f9c0d79531cdc0d622e474e786 // 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 #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 #ifndef __NR_write #define __NR_write 64 #endif static unsigned long long procid; //% 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 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, loopfd = -1, 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) { memset(loopname, 0, sizeof(loopname)); snprintf(loopname, sizeof(loopname), "/dev/loop%llu", procid); if (setup_loop_device(data, size, loopname, &loopfd) == -1) return -1; 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) { ioctl(loopfd, LOOP_CLR_FD, 0); close(loopfd); } errno = err; return res; } uint64_t r[1] = {0xffffffffffffffff}; int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000ul, /*prot=*/7ul, /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=*/0x32ul, /*fd=*/-1, /*offset=*/0ul); intptr_t res = 0; memcpy((void*)0x200000c0, "hfs\000", 4); memcpy((void*)0x20000100, "./file2\000", 8); memcpy( (void*)0x20000c00, "\x78\x9c\xec\xdd\xcf\x4e\x13\x51\x14\xc7\xf1\xdf\x1d\x06\x98\x0a\xc1\x11" "\x30\x26\xc6\x85\x41\x49\x8c\x0b\x23\xb8\x31\x6e\x34\x86\x87\x70\x65\x54" "\x5a\x13\xe2\x04\x13\xc0\x28\x6c\x44\xd7\xc6\x07\x70\xef\x2b\xf8\x10\xae" "\x8c\x2f\xe0\x4a\x57\x3e\x40\x57\x8e\xb9\x77\x6e\xe9\x94\x76\x66\xf8\xd3" "\x32\x82\xdf\x4f\x42\x3b\x9d\xde\x33\x3d\xb7\xf3\xe7\xde\xd3\x84\x8c\x00" "\xfc\xb7\x1e\xae\xfc\xf8\x7c\xe7\x97\xfd\x33\xd2\x98\xc6\x24\xdd\x93\x02" "\xa5\x8a\xa4\x50\xd2\x45\x5d\x8a\x5e\xad\x6f\xad\x6d\x25\xad\x66\xd9\x86" "\xc6\x64\x23\xec\x9f\x51\x16\x69\xfa\xda\x18\xb5\x06\x85\xda\x38\x17\xe1" "\xc5\xf6\x55\xa8\xe9\x68\x08\xfd\x43\xb9\x28\x9d\x6c\xf8\xc5\x89\xc3\xc6" "\xa6\x99\xb7\xc3\xcf\x0a\x27\xcd\x9d\xfd\x6a\xf4\xad\x0f\xa4\x49\x7f\x76" "\xda\x6b\x83\xce\xca\x39\xb9\x5b\x77\x02\x35\x33\x6d\xb5\xf5\x46\x33\x75" "\xe7\x01\x00\xa8\x57\x36\xfe\xdb\xe1\xde\x3d\x4f\xfb\xf9\x7b\x10\x48\x8b" "\x7e\xd8\x3f\x53\xe3\x7f\xbb\xee\x04\x46\xa2\x7f\xfe\x56\x24\x37\xfe\xbb" "\xca\x2b\x35\x76\xff\x9e\x77\x6f\x75\xeb\x3d\x57\xc2\xd9\xf7\x83\x4e\x95" "\x78\x94\xac\x5c\x61\x11\xf8\x03\x68\x2f\x81\xaa\xaa\xd2\xe5\x12\x34\x9e" "\xaf\x25\xad\x5b\xab\x2f\x93\x66\xa0\xf7\xba\xef\xe5\x9a\xcd\xbb\xc7\x66" "\x76\xe8\x76\xf8\x6c\xdd\xc1\xfa\xae\x7f\xd3\x0b\x03\x6a\xd3\x12\x47\xef" "\xfb\x94\xeb\xc3\xb8\xed\xc3\x72\x41\xfe\x73\xc3\xfd\xc4\x6a\xe6\xab\xf9" "\x66\x1e\x9b\x58\x9f\xd4\xdc\x9b\xff\x85\xa9\xb1\xbb\xc9\xed\xa9\x78\xdf" "\x9e\xca\xf2\xbf\x5d\xbc\x45\xd7\xcb\x38\x6b\x55\xd0\xcb\x0b\xee\x43\x2e" "\xf7\x16\x99\x15\xbd\x8c\xb2\x34\xfe\xf8\x32\x33\xff\xd6\x84\xdf\x66\x98" "\x4f\x35\xae\xca\xd3\x45\xcd\xf6\xfc\xd4\xd0\xe9\xdd\x52\x45\xd4\xdc\xc0" "\xa8\xe5\x8a\xa8\xf9\xfd\x51\x7b\x47\xf3\x4f\xfb\x32\x29\x0e\x1f\x21\xf3" "\xd1\x3c\x32\x0b\xfa\xad\x2f\x5a\xc9\xcd\xff\x03\xfb\x4d\x2e\xea\x20\x67" "\xa6\x6d\xe3\x5a\x06\xe3\x0d\xfb\x8d\xdb\xb3\xb3\xb0\x65\xe8\x5a\xc6\xf9" "\x55\xbb\x57\x06\xb6\x0c\x0e\xb0\x06\xc7\xe6\x2f\x7d\x1f\xf4\x4c\x77\x35" "\xb3\xb9\xbd\x33\xf1\x34\x49\x5a\x1b\x9b\xdb\x3b\x2f\x58\x28\x5f\xf0\x57" "\xa2\x74\xe4\x9f\x15\x8e\xb8\x3b\x9d\x63\xe1\x9f\xf8\x56\x8f\xbb\xa0\xb8" "\xb5\xd1\x4e\xd3\xb4\xee\x7c\x1e\x5c\xd5\x70\x37\x68\xc7\x90\xfa\xba\x53" "\xe3\x25\x0a\x27\xa6\xbb\xd3\xeb\xce\x04\x35\xb1\xb3\x2c\x93\xd5\x7f\x53" "\x51\x77\xbe\xef\xe6\x09\xf6\x21\x2e\x99\xa7\xa7\xbd\x2f\xfb\xcb\xaa\x5c" "\x05\xb4\xd4\xad\x0d\x94\xaf\x0d\x66\xdd\xe3\xb9\xee\x74\xef\xe6\xeb\xec" "\xb9\xa4\x36\x98\x2a\xae\xe0\x0e\x5a\x73\x5d\xbb\x21\x5d\xcf\xad\xac\xa8" "\x46\x62\x9f\xe7\x19\x61\x56\xf4\x5d\x4f\xf8\xfd\x1f\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\xe0\xb4\x39\x89\x7f\x27\xa8\xbb\x8f" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x9c" "\x76\x45\xf7\xff\xd5\x28\xee\xff\xbb\xba\x7e\xa8\xfb\xff\xf6\xde\x3c\x07" "\xc0\xb0\xfd\x0d\x00\x00\xff\xff\x52\x55\x8b\xac", 678); syz_mount_image(/*fs=*/0x200000c0, /*dir=*/0x20000100, /*flags=*/0, /*opts=*/0x20000000, /*chdir=*/3, /*size=*/0x2a6, /*img=*/0x20000c00); memcpy((void*)0x20000040, "./file2\000", 8); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000040ul, /*flags=*/0x143842ul, /*mode=*/0ul); if (res != -1) r[0] = res; memcpy( (void*)0x20004200, "\x74\xef\xc4\xc4\x19\xfd\xb8\xd6\x6b\xbb\xa7\x28\xf3\x71\xd0\x56\xad\x6f" "\x01\xe9\x76\x2d\x70\x40\x1d\x1c\x9d\x33\x1b\x48\xb9\x25\xe9\xe6\xa7\x75" "\x9a\xbb\x20\x6b\x9b\x18\xbf\xc3\xf3\xf9\x6a\xdb\x2b\x37\xc2\x12\x1e\xf2" "\x1e\x91\xba\xc7\x68\xdd\x33\xdf\x29\x64\x9d\xa1\xd8\x2e\x82\x6a\x55\xc4" "\xd6\x20\xb6\xf5\x10\xda\xee\x26\x00\x4b\x74\x1c\x95\x1d\x52\x8d\x80\x6e" "\xfb\xe0\x0c\x43\x9f\x2d\xf4\x6d\x3a\xdf\x8b\xe2\x4e\x28\x0b\x94\x8a\x49" "\xaf\xd1\x7d\x56\x43\x7c\x6e\x75\x2d\x84\xf9\x9b\xf3\x7a\x88\xf0\xc5\x44" "\x88\xdd\x13\xb8\x48\xf2\x38\x1d\x7d\x2a\xec\xb6\x8e\xd1\x67\x62\xe4\xa3" "\xc1\xa8\x47\x56\x53\x64\xb9\xf1\xaf\x92\xc9\xc8\x9e\x06\xe8\x9f\xe6\x17" "\x9c\xb7\x07\x8a\x74\x2c\xb9\x68\xa9\xf0\x9c\xc6\x90\xdc\x47\x3d\xf2\x9d" "\x6a\xd9\xaf\x58\x79\xe9\xa2\x61\x8c\x63\x70\x21\x17\xa3\xa6\x3d\x3a\x42" "\x36\xba\xee\x86\xf5\xf4\x52\xe9\x66\x3a\x79\x53\x06\xda\xbb\x97\xdb\x88" "\x43\x48\xab\x43\x7b\xdc\x13\xb7\xcf\xb0\x3e\xff\x1c\xf2\x16\xf0\x9d\x21" "\x07\x8e\x18\x52\xfc\x7c\x96\x41\x3d\x9d\x65\xc5\x2c\xe9\xba\xa6\xbc\x26" "\xde\x7f\x02\x87\x38\xa1\x71\x20\xde\x30\xa4\x33\xc9\xc3\xc8\xe2\x76\xf3" "\xae\x5e\x18\xa1\xf9\x57\x67\xff\xfe\x8e\x98\xb0\xc3\xf1\x34\xf1\x22\x63" "\xb0\x1c\x36\x86\x6d\x4e\x0e\x85\x6c\xc1\x4e\xcf\x50\x27\x9a\xdb\x94\x38" "\xc6\x21\x9c\x49\xca\xe9\x73\xd8\xe7\xfa\xf3\x3d\xcd\xeb\x96\xd7\xef\x7e" "\x89\xae\x82\x8c\xb9\x1d\xf2\x29\x39\x30\x7b\xb1\xf7\xfb\x73\x92\xe1\xe2" "\x4f\x6b\x63\x16\x6b\x89\x93\x7c\x00\xeb\x8f\xea\x02\x45\xcd\x93\xe4\xaa" "\x80\x31\x60\xbd\x71\xc1\xa0\xbb\xb6\xb8\x28\x5d\x8a\xb6\x54\x48\x5a\xb9" "\x85\xf1\xdd\x2e\xb9\xab\xf5\x31\x31\xa9\x68\x0d\xca\xfe\x40\x00\xd3\xea" "\x52\x8d\xd5\x2a\xba\x3e\x4f\xf6\xa3\x88\x3e\xc6\x14\x25\x3d\x56\x27\xbd" "\x91\x52\x2d\x88\x11\x28\x32\x8e\xd1\xe0\x09\x07\xfa\x6c\xc4\x8c\xec\x52" "\x68\xbb\xed\xd8\x5e\xc0\x2d\x8b\xac\x31\x83\x46\x0d\xd1\xa2\x7f\xbc\x06" "\xb5\x64\x24\x73\xa4\x1a\x6c\xbf\xb0\x7f\x53\xde\xab\x24\x73\xb3\x7c\x3d" "\x10\xa1\x25\xd6\x10\xf1\xb9\xea\x5c\x83\xe7\xd4\x62\x04\x8f\x25\xfc\x1e" "\x79\x29\x5e\xef\xf7\x50\xa2\x3f\xaf\x5d\x54\x27\x58\xc4\x21\xbb\x06\x73" "\x50\x4c\x9d\xba\xe2\x95\x9f\x77", 512); syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x20004200ul, /*count=*/0xffe00ul); return 0; }