// https://syzkaller.appspot.com/bug?id=9bcce2bee542fa9e87b18b57267db95c9e91db0e // 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 #ifndef __NR_memfd_create #define __NR_memfd_create 319 #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) { errno = EMSGSIZE; return -1; } 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, 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) { if (strstr(opts, "errors=panic") || strstr(opts, "errors=remount-ro") == 0) 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; } int main(void) { syscall(__NR_mmap, 0x1ffff000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul); syscall(__NR_mmap, 0x20000000ul, 0x1000000ul, 7ul, 0x32ul, -1, 0ul); syscall(__NR_mmap, 0x21000000ul, 0x1000ul, 0ul, 0x32ul, -1, 0ul); memcpy((void*)0x20000180, "hfsplus\000", 8); memcpy((void*)0x20000640, "./file0\000", 8); memcpy( (void*)0x20000cc0, "\x78\x9c\xec\xdd\xc1\x6f\x1c\x57\x1d\x07\xf0\xef\x6c\xe2\xcd\x3a\x48\xe9" "\x26\x4d\x9a\x80\x90\xb0\xca\x01\xd4\x88\xd4\xf6\x56\x51\x90\x90\x80\x52" "\x90\x85\x2a\x54\x89\x4b\xaf\x56\xb2\xa9\xad\x6c\xd2\xc8\xde\x22\x37\x07" "\x14\x10\xe7\xf6\x5f\x28\x07\x73\xe6\xc0\x09\x05\x29\x07\xce\xfc\x0b\x46" "\x3d\x22\xb8\xfb\x66\x34\xb3\xb3\xde\x4d\xb2\x75\xed\x26\xcd\xae\xdd\xcf" "\x47\x9a\x7d\xef\xcd\x9b\x79\xf3\x9b\x9f\x67\x46\x33\xb3\xb2\x36\xc0\x37" "\xd6\xca\xfb\x99\x7b\x9c\x22\x2b\x57\xdf\xdd\x2a\xdb\x3b\xdb\x9d\xde\xce" "\x76\xe7\xee\xb0\x9e\xe4\x4c\x92\x46\xd2\x4a\x52\x94\xb3\xff\x96\xe4\xf3" "\xe4\x61\x06\x53\xbe\x3d\xec\x18\x2b\x9f\x51\x7c\xba\x72\x73\xed\xd1\x27" "\x97\x07\xad\x56\x3d\x55\xcb\x17\x07\xad\x77\x38\xfb\xb1\xb4\x07\xb1\x56" "\xe5\x8b\x1a\x6f\xf9\x28\xe3\x35\x27\xcd\x1c\xed\xe1\x42\x92\x0b\x75\x09" "\x53\xb7\x37\xf4\xef\x89\xdd\xcf\x79\x5e\x02\x00\xb3\xac\x48\x4e\x4d\x9a" "\xdf\x4e\xce\xd6\x37\xeb\xe5\x73\xc0\xe0\xae\x78\x70\x8f\x7d\xac\x3d\x9c" "\x76\x00\x00\x00\x00\xf0\x12\xbc\xb2\x9b\xdd\x6c\xe5\xdc\xb4\xe3\x00\x00" "\x00\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\xe3\xa4\xfe\xfd\xff\xa2\x9e\x1a\xc3\xfa" "\x42\x8a\xe1\xef\xff\x37\xeb\x79\xa9\xeb\xc7\xda\xe3\x69\x07\x00\x00\x00" "\x00\x00\x00\x00\x00\x2f\xc0\xf7\x76\xb3\x9b\xad\x9c\x1b\xb6\xf7\x8a\xea" "\x3b\xff\xd7\xab\xc6\xc5\xea\xf3\x5b\xf9\x28\x9b\xe9\x66\x23\xd7\xb2\x95" "\xd5\xf4\xd3\xcf\x46\x96\x92\xb4\xc7\x06\x6a\x6e\xad\xf6\xfb\x1b\x4b\x87" "\x58\x73\x79\xe2\x9a\xcb\x2f\x67\x7f\x01\x00\x00\x00\x00\x00\x00\xe0\x84" "\xfa\x63\x56\x46\xdf\xff\x03\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xc0" "\x2c\x28\x92\x53\x83\xa2\x9a\x2e\x0e\xeb\xed\x34\x4e\x27\x69\x25\x69\x96" "\xcb\x3d\x4c\x1e\x0d\xeb\xc7\xd9\xe3\x69\x07\x00\x00\x00\x00\x2f\xc1\x2b" "\xbb\xd9\xcd\x56\xce\x0d\xdb\x7b\x45\xf5\xcc\xff\x5a\xf5\xdc\xdf\xca\x47" "\xb9\x97\x7e\xd6\xd3\x4f\x2f\xdd\xdc\x4a\x63\x7f\xc5\xc6\xce\x76\xa7\xb7" "\xb3\xdd\xb9\x5b\x4e\xcf\x8e\xfb\xf3\xff\x1d\x29\x8c\x66\x39\x62\x06\xef" "\x1e\x26\x6f\x79\xb1\x5a\xe2\xd2\xfe\x1a\x2b\xf9\x55\x7e\x9b\xab\x59\xc8" "\x7b\xd9\xc8\x7a\x7e\x97\xd5\xf4\xd3\xcd\x42\xde\xa9\x6a\xab\x29\xd2\xae" "\xdf\x5e\xb4\x87\x71\x4e\x8e\xf7\x67\x4f\xb4\xde\xfb\xb2\x58\xaf\x54\x91" "\xcc\xe7\x76\xd6\xab\xd8\xae\xe5\x66\x3e\x4c\xaf\xca\xce\x30\x3f\x57\x0e" "\xde\xe2\x1f\xca\xec\x14\x3f\xad\x1d\x32\x47\xb7\xea\xb2\xdc\xa3\x5f\xd7" "\xe5\x6c\x68\x57\x19\x99\xdb\xcf\xc8\x62\x9d\xfb\x32\x1b\xe7\x0f\xce\xc4" 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"\xae\xfa\x2e\x4f\xec\xeb\x54\x7d\x57\xc6\xfa\x26\xdd\xe5\x00\x30\xf3\xce" "\xbe\x71\xb6\x39\xff\x9f\xf9\x7f\xcd\x7f\x36\xff\xa7\xf9\xb5\xf9\x77\x5b" "\x6f\x9f\xb9\x71\xe6\xbb\xcd\xcc\xfd\xf3\xf4\xdf\x4f\xfd\xb5\xf1\x97\xc6" "\x4f\x8a\x37\xf2\x59\x7e\x3f\x7a\xfe\x07\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xbe\xba\xcd" "\x8f\x1f\xdc\x59\xed\xf5\xba\x1b\x27\xb9\xb2\x77\x2a\x99\x81\x30\x54\x54" "\x8e\x4f\x65\xda\x57\x26\xe0\xeb\xf6\x66\xff\xee\xfd\x37\x37\x3f\x7e\xf0" "\xa3\xf5\xbb\xab\x1f\x74\x3f\xe8\xde\x7b\x6b\xe9\xc1\xb0\xeb\xf6\x7a\xaf" "\xbb\x38\xf8\x9c\x72\x94\x00\xc0\x8b\x34\xba\xe9\x9f\x76\x24\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\xc0\x17\x79\x19\xff\x4e\x3c\xed\x7d\x04" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" 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"\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x4e" "\xb6\x95\xf7\x33\xf7\x38\x45\x96\x16\xaf\x2d\x96\xed\x9d\xed\x4e\xaf\x9c" "\x86\xf5\xd1\x92\xad\x24\x45\x59\xf9\x47\x92\xcf\x93\x87\x19\x4c\x69\x8f" "\x0d\x57\x7c\xd1\x76\x8a\x4f\x57\x6e\xae\x3d\xfa\xe4\xf2\x68\xac\xd6\x70" "\xf9\xe2\xa0\xf5\x0e\xe7\x89\x58\x1a\x4f\xc5\xf4\xbc\xe3\x2d\x3f\xf7\x78" "\xa3\x3d\x5c\x48\x72\xa1\x2e\x61\xea\xfe\x1f\x00\x00\xff\xff\x02\x0c\xfb" "\x9b", 1495); syz_mount_image(0x20000180, 0x20000640, 0, 0x20000240, 1, 0x5d7, 0x20000cc0); return 0; }