// https://syzkaller.appspot.com/bug?id=53142c1cfa33358ae71adf5da314a52c8dd8f291 // 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 #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 use_temporary_dir(void) { char tmpdir_template[] = "./syzkaller.XXXXXX"; char* tmpdir = mkdtemp(tmpdir_template); if (!tmpdir) exit(1); if (chmod(tmpdir, 0777)) exit(1); if (chdir(tmpdir)) exit(1); } 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; } #define FS_IOC_SETFLAGS _IOW('f', 2, long) static void remove_dir(const char* dir) { int iter = 0; DIR* dp = 0; const int umount_flags = MNT_FORCE | UMOUNT_NOFOLLOW; retry: while (umount2(dir, umount_flags) == 0) { } dp = opendir(dir); if (dp == NULL) { if (errno == EMFILE) { exit(1); } exit(1); } struct dirent* ep = 0; while ((ep = readdir(dp))) { if (strcmp(ep->d_name, ".") == 0 || strcmp(ep->d_name, "..") == 0) continue; char filename[FILENAME_MAX]; snprintf(filename, sizeof(filename), "%s/%s", dir, ep->d_name); while (umount2(filename, umount_flags) == 0) { } struct stat st; if (lstat(filename, &st)) exit(1); if (S_ISDIR(st.st_mode)) { remove_dir(filename); continue; } int i; for (i = 0;; i++) { if (unlink(filename) == 0) break; if (errno == EPERM) { int fd = open(filename, O_RDONLY); if (fd != -1) { long flags = 0; if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) { } close(fd); continue; } } if (errno == EROFS) { break; } if (errno != EBUSY || i > 100) exit(1); if (umount2(filename, umount_flags)) exit(1); } } closedir(dp); for (int i = 0;; i++) { if (rmdir(dir) == 0) break; if (i < 100) { if (errno == EPERM) { int fd = open(dir, O_RDONLY); if (fd != -1) { long flags = 0; if (ioctl(fd, FS_IOC_SETFLAGS, &flags) == 0) { } close(fd); continue; } } if (errno == EROFS) { break; } if (errno == EBUSY) { if (umount2(dir, umount_flags)) exit(1); continue; } if (errno == ENOTEMPTY) { if (iter < 100) { iter++; goto retry; } } } exit(1); } } 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"); if (symlink("/dev/binderfs", "./binderfs")) { } } static void execute_one(void); #define WAIT_FLAGS __WALL static void loop(void) { int iter = 0; for (;; iter++) { char cwdbuf[32]; sprintf(cwdbuf, "./%d", iter); if (mkdir(cwdbuf, 0777)) exit(1); reset_loop(); int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { if (chdir(cwdbuf)) exit(1); 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; } remove_dir(cwdbuf); } } uint64_t r[1] = {0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } // syz_mount_image$exfat arguments: [ // fs: ptr[in, buffer] { // buffer: {65 78 66 61 74 00} (length 0x6) // } // dir: ptr[in, buffer] { // buffer: {2e 2f 62 75 73 00} (length 0x6) // } // flags: mount_flags = 0x200880 (8 bytes) // opts: ptr[inout, array[ANYUNION]] { // array[ANYUNION] { // union ANYUNION { // ANYBLOB: buffer: {74 69 6d 65 5f 6f 66 66 73 65 74 3d 30 78 30 30 // 30 30 30 30 30 30 00 30 30 30 30 30 30 36 2c 65 72 72 6f 72 73 3d // 63 6f 6e 74 69 6e 75 65 2c 75 74 66 38 2c 74 69 6d 65 5f 6f 66 66 // 73 65 74 3d 30 78 30 30 30 30 30 30 30 30 30 30 30 30 30 30 30 36 // 2c 75 74 66 38 2c 00} (length 0x59) // } // } // } // chdir: int8 = 0x3 (1 bytes) // size: len = 0x1512 (8 bytes) // img: ptr[in, buffer] { // buffer: (compressed buffer with length 0x1512) // } // ] // returns fd_dir memcpy((void*)0x200000000080, "exfat\000", 6); memcpy((void*)0x200000000380, "./bus\000", 6); memcpy((void*)0x2000000001c0, "time_offset=0x00000000\0000000006,errors=continue,utf8,time_offset=" "0x0000000000000006,utf8,\000", 89); memcpy( (void*)0x200000003a00, "\x78\x9c\xec\xdc\x0b\x9c\x4e\xd5\xfa\x38\xf0\xe7\x59\x6b\xed\x31\x24\xbd" "\x49\x2e\xc3\x5a\xeb\xd9\xbc\xc9\x65\x91\x24\xb9\x24\xc9\x25\x49\x92\x24" "\xc9\x2d\x21\x34\xe4\x48\x42\x62\xc8\x2d\x69\x48\x42\x72\x19\x92\xcb\x10" "\x92\xcb\xc4\xa4\x71\xbf\xdf\xaf\x49\x92\x34\x49\x92\x5b\x6e\xc9\xfa\x7f" "\xa6\x38\x4e\xa7\xfa\xf7\xeb\x77\xfa\x1d\xe7\x73\xe6\xf9\x7e\x3e\xfb\x63" "\x3d\xef\xda\xcf\xda\x6b\xcf\xb3\x5f\xef\xda\x9b\x77\xbe\xe9\x32\xb4\x7a" "\xc3\x1a\x55\xea\x13\x11\xfc\x4b\xf0\xe7\x3f\x12\x00\x20\x16\x00\x06\x02" "\xc0\x75\x00\x10\x00\x40\x99\x9c\x65\x72\x66\xf4\x67\x95\x98\xf0\xaf\x1d" "\x84\xfd\xb5\x1e\x49\xbe\xda\x33\x60\x57\x13\xd7\x3f\x73\xe3\xfa\x67\x6e" "\x5c\xff\xcc\x8d\xeb\x9f\xb9\x71\xfd\x33\x37\xae\x7f\xe6\xc6\xf5\xcf\xdc" "\xb8\xfe\x8c\x65\x66\x9b\xa7\xe7\xbb\x9e\xb7\xcc\xbb\xf1\xf3\xff\xcc\x8c" 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"\xa3\xdd\x18\x37\xc6\x8d\x73\xe3\x5c\x92\x4b\x72\x13\xdd\x44\x37\xc9\x4d" "\x72\x93\xdd\x64\x37\xd5\x4d\x75\xc9\x2e\xd9\xcd\x70\x33\xdc\x4c\x37\xd3" "\x55\x9a\xf5\xf3\x51\xe6\xba\xb9\x6e\xbe\x9b\xef\x52\x5c\x8a\x5b\xe8\x32" "\xd6\x8c\xa9\x6e\xb1\x5b\xec\xd2\x5c\x9a\x5b\xea\x96\xba\xe5\x6e\xb9\x5b" "\xe9\x56\xba\xd5\x6e\xb5\x5b\xeb\xd6\xba\xf5\x6e\xbd\xdb\xe8\x36\xba\xcd" "\x6e\xb3\xdb\xea\xb6\xba\xed\x6e\xbb\xdb\xe9\x76\xba\xdd\x6e\xb7\xdb\xe3" "\xaf\xfb\x79\x50\xb7\xcf\xed\x77\xfb\xdd\x01\x77\xc0\x1d\x74\x5f\xba\x74" "\xf7\x95\x3b\xe4\xbe\x76\x87\xdd\x37\xee\x88\xfb\xd6\x1d\x75\xdf\xb9\x63" "\xee\xb8\x3b\xe1\x4e\xba\x53\xee\x7b\x77\xda\x9d\x71\x67\xdd\x39\x77\xde" "\xfd\xe0\x2e\xb8\x1f\xdd\x45\xe7\x5d\x52\x64\x42\x64\x62\xe4\xed\xc8\xa4" "\xc8\x3b\x91\xc9\x91\x29\x91\xa9\x91\x69\x91\xe4\xc8\xf4\xc8\x8c\xc8\xbb" "\x91\x99\x91\x59\x91\xd9\x91\xf7\x22\x73\x22\xef\x47\xe6\x46\xe6\x45\xe6" "\x47\x16\x44\x52\x22\x1f\x44\x16\x46\x16\x45\x52\x23\x1f\x46\x16\x47\x3e" "\x8a\xa4\x45\x96\x44\x96\x46\x96\x45\x96\x47\x56\x44\xbc\xcf\xbf\x35\xf4" "\x05\x7d\x21\x1f\xf5\x37\xf9\xc2\xfe\x66\x5f\xc4\x17\xf5\xc5\x7c\x71\xef" "\x7c\x09\x5f\xd2\xdf\xe2\x4b\xf9\x5b\x7d\x69\x7f\x9b\x2f\xe3\x6f\xf7\x65" "\xfd\x1d\xbe\x9c\x2f\xef\x2b\xf8\xc7\x7d\x63\xdf\xc4\x37\xf5\xcd\x7c\x73" "\xff\x84\x6f\xe1\x9f\xf4\x2d\x7d\x2b\xdf\xda\x3f\xe5\xdb\xf8\xb6\xbe\x9d" "\x7f\xda\xc7\xfb\xf6\xbe\x83\x7f\xc6\x77\xf4\x7f\xf3\x9d\xfc\xb3\xbe\xb3" "\x7f\xce\x77\xf1\xcf\xfb\xae\xbe\x9b\xef\xee\x5f\xf0\x3d\xfc\x8b\xbe\xa7" "\xef\xe5\x13\x7c\x6f\xdf\xc7\xbf\xe4\xfb\xfa\x7e\xbe\xbf\x1f\xe0\x07\xfa" "\x97\xfd\x20\xff\x8a\x1f\xec\x5f\xf5\x89\x7e\x88\x1f\xea\x5f\xf3\xc3\xfc" "\xeb\x7e\xb8\x7f\xc3\x8f\xf0\x23\xfd\xa8\x98\x37\xfd\xe8\xcb\xb7\xc8\x30" "\xde\x27\xf9\x09\x7e\xa2\x7f\xdb\x4f\xf2\xef\xf8\xc9\x7e\x8a\x9f\xea\xa7" "\xf9\x64\x3f\xdd\xcf\xf0\xef\xfa\x99\x7e\x96\x9f\xed\xdf\xf3\x73\xfc\xfb" "\x7e\xae\x9f\xe7\xe7\xfb\x05\x3e\xc5\x7f\xe0\x17\xfa\x45\x3e\xd5\x7f\xe8" "\x17\xfb\x8f\x7c\x9a\x5f\x72\xf9\xa1\xb2\x5f\xe9\x57\xf9\xd5\x7e\x8d\x5f" "\xeb\xd7\xf9\xf5\x7e\x83\xdf\xe8\x37\xf9\xcd\x7e\x8b\xdf\xea\xb7\xf9\xed" "\x7e\x87\xdf\xe9\x77\xf9\xdd\xfe\x63\xbf\xc7\x7f\xe2\xf7\xfa\x4f\xfd\x3e" "\xff\x99\xdf\xef\x3f\xf7\x07\xfc\x17\xfe\xa0\xff\xd2\xa7\xfb\xaf\xfc\x21" "\xff\xb5\x3f\xec\xbf\xf1\x47\xfc\xb7\xfe\xa8\xff\xce\x1f\xf3\xc7\xfd\x09" "\x7f\xd2\x9f\xf2\xdf\xfb\xd3\xfe\x8c\x3f\xeb\xcf\xf9\xf3\xfe\x07\x7f\xc1" "\xff\xe8\x2f\xf2\x77\xd6\x18\x63\x8c\x31\xc6\xfe\x47\x26\x5c\x69\x8a\xdf" "\xea\xef\xfd\x1b\xaf\x89\x7f\xd8\xb9\x0f\x00\x5c\xbb\x2d\x5f\xfa\x3f\xf6" "\x67\xac\x28\xd7\xe7\xfe\xb9\xdd\x4f\xc4\xb5\x89\x00\x40\xfb\x5e\x5d\x1e" "\xb9\xbc\x55\xad\x9a\x90\x90\x70\x69\xdf\x34\x09\x41\xa1\x79\x00\x97\xff" "\x25\x28\x43\x0c\x5c\x89\x97\x40\x6b\x68\x0b\xf1\xd0\x0a\x4a\xfd\xe6\xfc" "\xfb\x89\x6e\xe7\xe9\x0f\xc6\x8f\xde\x0e\x90\xed\x1f\x72\x62\xe1\x4a\x7c" "\x65\xfc\xcf\x7f\x67\xfc\x27\x9e\x1a\xb5\xb0\x6c\x78\x36\xe7\xff\x67\xfc" "\x79\x00\x45\x0a\x5d\xc9\xc9\x0a\x7f\x8f\xff\xfe\xed\x8a\x56\x50\xfa\x77" "\xc6\xcf\xd3\xe2\x0f\xe6\x9f\xf5\x8b\x24\x80\x96\xff\x90\x93\x1d\xae\xc4" "\x57\xe6\x5f\x12\x9e\x84\x67\x20\xfe\x17\x7b\x32\xc6\x18\x63\x8c\x31\xc6" "\x18\x63\x3f\xeb\x27\x2a\x74\xba\x7c\xff\x79\xf9\x7f\x7c\xfe\xd6\xfd\x79" "\x9c\xba\x92\x93\x71\x53\x7b\x39\xfe\xa3\xfb\x73\xc6\x18\x63\x8c\x31\xc6" "\x18\x63\x8c\x5d\x7d\xcf\x76\xeb\xfe\xf4\x13\xf1\xf1\xad\x3a\xfd\xf9\x46" "\xe5\xff\x55\x16\x37\xfe\x53\x1b\xde\x03\x5c\x7e\x45\x01\xc0\xbf\x38\x20" "\xc0\xbf\xfd\x2c\xb6\xfc\x5b\x8e\x95\x78\xe9\xad\xf3\xcf\x5d\xcb\xcf\xf9" "\x00\xfe\x33\x4a\xf9\x57\x34\xae\xf2\x5f\x4c\x8c\x31\xc6\x18\x63\x8c\xb1" "\xbf\xdc\x95\x45\xff\x2f\x5f\x57\x57\x6b\x42\x8c\x31\xc6\x18\x63\x8c\x31" "\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63" "\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x58\x26\xf4\xef\xf8" "\x75\x62\x57\xfb\x1c\x19\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c" "\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18" "\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\x31\xc6\x18\x63\x8c\xb1" "\xab\xed\xff\x05\x00\x00\xff\xff\x3e\x0b\x0a\x80", 5394); syz_mount_image(/*fs=*/0x200000000080, /*dir=*/0x200000000380, /*flags=MS_RELATIME|MS_NODIRATIME|MS_DIRSYNC*/ 0x200880, /*opts=*/0x2000000001c0, /*chdir=*/3, /*size=*/0x1512, /*img=*/0x200000003a00); // mount arguments: [ // src: nil // dst: ptr[in, buffer] { // buffer: {2e 00} (length 0x2) // } // type: nil // flags: mount_flags = 0x2390024 (8 bytes) // data: nil // ] memcpy((void*)0x200000000240, ".\000", 2); syscall( __NR_mount, /*src=*/0ul, /*dst=*/0x200000000240ul, /*type=*/0ul, /*flags=MS_LAZYTIME|MS_SHARED|MS_SLAVE|MS_POSIXACL|MS_REMOUNT|MS_RELATIME|0x4*/ 0x2390024ul, /*data=*/0ul); // openat$fuse arguments: [ // fd: const = 0xffffffffffffff9c (8 bytes) // file: ptr[in, buffer] { // buffer: {2f 64 65 76 2f 66 75 73 65 00} (length 0xa) // } // flags: const = 0x2 (4 bytes) // mode: const = 0x0 (2 bytes) // ] // returns fd_fuse memcpy((void*)0x200000000040, "/dev/fuse\000", 10); res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x200000000040ul, /*flags=*/2, /*mode=*/0); if (res != -1) r[0] = res; // syz_mount_image$fuse arguments: [ // fs: ptr[in, buffer] { // buffer: {66 75 73 65 00} (length 0x5) // } // dir: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8) // } // flags: mount_flags = 0x0 (8 bytes) // opts: ptr[in, fuse_options] { // fuse_options { // fd: fs_opt["fd", fmt[hex, fd_fuse]] { // name: buffer: {66 64} (length 0x2) // eq: const = 0x3d (1 bytes) // val: fd_fuse (resource) // } // comma0: const = 0x2c (1 bytes) // rootmode: fs_opt["rootmode", fmt[oct, flags[fuse_mode]]] { // name: buffer: {72 6f 6f 74 6d 6f 64 65} (length 0x8) // eq: const = 0x3d (1 bytes) // val: fuse_mode = 0x4000 (23 bytes) // } // comma1: const = 0x2c (1 bytes) // user_id: fs_opt["user_id", fmt[dec, uid]] { // name: buffer: {75 73 65 72 5f 69 64} (length 0x7) // eq: const = 0x3d (1 bytes) // val: uid (resource) // } // comma2: const = 0x2c (1 bytes) // group_id: fs_opt["group_id", fmt[dec, gid]] { // name: buffer: {67 72 6f 75 70 5f 69 64} (length 0x8) // eq: const = 0x3d (1 bytes) // val: gid (resource) // } // comma3: const = 0x2c (1 bytes) // opts: fs_options[fuse_opts] { // elems: array[fs_opt_elem[fuse_opts]] { // } // common: array[fs_opt_elem[fs_options_common]] { // } // null: const = 0x0 (1 bytes) // } // } // } // chdir: int8 = 0x0 (1 bytes) // size: const = 0x0 (8 bytes) // img: nil // ] // returns fd_dir memcpy((void*)0x200000002340, "fuse\000", 5); memcpy((void*)0x2000000000c0, "./file0\000", 8); memcpy((void*)0x2000000022c0, "fd", 2); *(uint8_t*)0x2000000022c2 = 0x3d; sprintf((char*)0x2000000022c3, "0x%016llx", (long long)r[0]); *(uint8_t*)0x2000000022d5 = 0x2c; memcpy((void*)0x2000000022d6, "rootmode", 8); *(uint8_t*)0x2000000022de = 0x3d; sprintf((char*)0x2000000022df, "%023llo", (long long)0x4000); *(uint8_t*)0x2000000022f6 = 0x2c; memcpy((void*)0x2000000022f7, "user_id", 7); *(uint8_t*)0x2000000022fe = 0x3d; sprintf((char*)0x2000000022ff, "%020llu", (long long)0); *(uint8_t*)0x200000002313 = 0x2c; memcpy((void*)0x200000002314, "group_id", 8); *(uint8_t*)0x20000000231c = 0x3d; sprintf((char*)0x20000000231d, "%020llu", (long long)0); *(uint8_t*)0x200000002331 = 0x2c; *(uint8_t*)0x200000002332 = 0; syz_mount_image(/*fs=*/0x200000002340, /*dir=*/0x2000000000c0, /*flags=*/0, /*opts=*/0x2000000022c0, /*chdir=*/0, /*size=*/0, /*img=*/0); } 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; use_temporary_dir(); loop(); return 0; }