// https://syzkaller.appspot.com/bug?id=a0bd8d1c892e8115c2abfd3937a7600127ff1615 // 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 279 #endif #ifndef __NR_mkdirat #define __NR_mkdirat 34 #endif #ifndef __NR_mmap #define __NR_mmap 222 #endif #ifndef __NR_mount #define __NR_mount 40 #endif #ifndef __NR_openat #define __NR_openat 56 #endif #ifndef __NR_pwrite64 #define __NR_pwrite64 68 #endif #ifndef __NR_write #define __NR_write 64 #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; } static long syz_open_dev(volatile long a0, volatile long a1, volatile long a2) { if (a0 == 0xc || a0 == 0xb) { char buf[128]; sprintf(buf, "/dev/%s/%d:%d", a0 == 0xc ? "char" : "block", (uint8_t)a1, (uint8_t)a2); return open(buf, O_RDWR, 0); } else { unsigned long nb = a1; char buf[1024]; char* hash; strncpy(buf, (char*)a0, sizeof(buf) - 1); buf[sizeof(buf) - 1] = 0; while ((hash = strchr(buf, '#'))) { *hash = '0' + (char)(nb % 10); nb /= 10; } return open(buf, a2 & ~O_CREAT, 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; } #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[2] = {0xffffffffffffffff, 0xffffffffffffffff}; void execute_one(void) { intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } // syz_mount_image$ext4 arguments: [ // fs: ptr[in, buffer] { // buffer: {65 78 74 34 00} (length 0x5) // } // dir: ptr[in, buffer] { // buffer: {2e 2f 62 75 73 00} (length 0x6) // } // flags: mount_flags = 0x8800 (8 bytes) // opts: ptr[in, fs_options[ext4_options]] { // fs_options[ext4_options] { // elems: array[fs_opt_elem[ext4_options]] { // fs_opt_elem[ext4_options] { // elem: union ext4_options { // journal_ioprio: fs_opt["journal_ioprio", fmt[hex, int32[0:7]]] // { // name: buffer: {6a 6f 75 72 6e 61 6c 5f 69 6f 70 72 69 6f} // (length 0xe) eq: const = 0x3d (1 bytes) val: int32 = 0x2 (18 // bytes) // } // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // usrquota: buffer: {75 73 72 71 75 6f 74 61} (length 0x8) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // minixdf: buffer: {6d 69 6e 69 78 64 66} (length 0x7) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // nombcache: buffer: {6e 6f 6d 62 63 61 63 68 65} (length 0x9) // } // comma: const = 0x2c (1 bytes) // } // } // common: array[fs_opt_elem[fs_options_common]] { // } // null: const = 0x0 (1 bytes) // } // } // chdir: int8 = 0x1 (1 bytes) // size: len = 0x52c (8 bytes) // img: ptr[in, buffer] { // buffer: (compressed buffer with length 0x52c) // } // ] // returns fd_dir memcpy((void*)0x20000180, "ext4\000", 5); memcpy((void*)0x20000540, "./bus\000", 6); memcpy((void*)0x20000500, "journal_ioprio", 14); *(uint8_t*)0x2000050e = 0x3d; sprintf((char*)0x2000050f, "0x%016llx", (long long)2); *(uint8_t*)0x20000521 = 0x2c; memcpy((void*)0x20000522, "usrquota", 8); *(uint8_t*)0x2000052a = 0x2c; memcpy((void*)0x2000052b, "minixdf", 7); *(uint8_t*)0x20000532 = 0x2c; memcpy((void*)0x20000533, "nombcache", 9); *(uint8_t*)0x2000053c = 0x2c; *(uint8_t*)0x2000053d = 0; memcpy( (void*)0x20000580, 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"\x3e\x8c\x93\xb9\x1c\x11\xdf\x3f\x8b\x60\x13\x70\xa9\xa8\xcf\xcc\xa4\x13" "\xe1\xff\x92\x44\xc4\x0b\x11\xf1\x4a\x7e\xff\xcf\xc7\xa5\xfc\xd3\x04\x00" "\x2e\xb2\x34\x9d\x8f\x74\xbe\x7f\xbb\xeb\x52\x0a\x00\x5c\x54\x49\x3e\x06" "\x56\x4a\xaa\xc5\x58\xc0\x5c\x24\x49\xb5\xda\x1d\xc3\x7b\x31\xae\x26\x8d" "\x56\xbb\x73\xfb\x61\x6b\x7b\x63\xa5\x3b\x56\x76\x23\xca\xc9\xc3\xb5\x46" "\xfd\x6e\x31\x56\x78\x23\xca\xa5\x6c\x7b\x31\x2f\x3f\xde\xae\x1d\xd9\xbe" "\x17\x11\xcf\x47\xc4\x2f\x66\xaf\xe4\xdb\xd5\xe5\x56\x63\x65\x92\xff\xf0" "\x01\x80\x29\x76\xed\x48\xff\xff\xef\xd9\x6e\xff\x0f\x00\x5c\x70\x95\x49" "\x27\x00\x00\x8c\xdd\x90\xfe\x7f\x6f\xdc\x79\x00\x00\xe3\xe3\xf9\x1f\x00" "\xa6\x8f\xfe\x1f\x00\xa6\x4f\x25\x7f\x87\xc3\x95\x49\xa7\x01\x00\x8c\x91" "\xe7\x7f\x00\x98\x3e\xfa\x7f\x00\x98\x2a\x3f\x78\xe7\x9d\x6c\x49\x0f\x8a" "\xf7\x5f\xaf\xbc\xbf\xb3\xbd\xde\x7a\xff\xce\x4a\xbd\xbd\x5e\x6d\x6e\x2f" "\x57\x97\x5b\x5b\x9b\xd5\xd5\x56\x6b\x35\x7f\x67\x4f\xf3\xb8\xeb\x35\x5a" "\xad\xcd\xc5\xd7\x63\xfb\x83\x1b\xdf\xde\x6c\x77\x16\xda\x3b\xbb\x0f\x9a" "\xad\xed\x8d\xce\x83\xfc\xbd\xde\x0f\xea\xe5\xfc\x2c\xdf\x2c\x00\x80\x49" "\x7a\xfe\xe5\x4f\xfe\x5c\xca\x7a\xe4\xb7\xae\xe4\x4b\xf4\xcd\xe5\x50\x9e" "\x68\x66\xc0\x59\x4b\x26\x9d\x00\x30\x31\x97\x86\x94\x81\x8b\xcf\x6c\x5f" "\x30\xbd\x4e\xf0\x8c\x6f\x78\x00\x2e\x88\x01\x53\xf4\x3e\xa1\x12\x03\xbe" "\x20\x94\xa6\x69\x7a\x76\x29\x01\x67\xec\xd6\x97\x8c\xff\xc3\xb4\xea\x1b" "\xff\xf7\xbf\x80\x61\xca\x18\xf3\x87\xe9\x65\xfc\x1f\xa6\x57\x9a\x96\x62" "\xc4\xa9\x82\x63\xd4\x13\x01\x80\xf3\xcd\x18\x3f\x30\xe4\xf7\xff\x2f\x14" "\xeb\xdf\x14\xbf\x1c\xf8\xf1\xca\xd1\x33\x3e\x3a\xcb\xac\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\xe0\x7c\xeb\xcd\xff\x5b\x2d\xe6\x02\x9f\x8b\x24\xa9\x56\x23\x9e" "\x8b\x88\x1b\x51\x2e\x3d\x5c\x6b\xd4\xef\x46\xc4\xf5\x88\xf8\xd3\x6c\x79" "\x36\xdb\x5e\x9c\x70\xce\x00\xc0\x49\x25\x7f\x2b\x15\xf3\x7f\xdd\x9a\x7f" "\x6d\xee\x89\x43\x2f\x5d\x3b\x2c\xce\x44\xc4\x4f\x7f\xf5\xee\x2f\x3f\x58" "\xea\x74\xb6\xfe\x18\x31\x53\xfa\xe7\x6c\x6f\x7f\xe7\xa3\x62\x7f\x6d\xfc" "\xd9\x03\x00\xc7\xeb\xf5\xd3\xf9\xba\xef\x41\xfe\xf3\xfd\x47\xcb\xbd\x65" "\x9c\xf9\xfc\xfd\xbb\x11\x51\xe9\xc6\x3f\xd8\x9f\x89\x83\xc3\xf8\x97\xe3" "\x72\xbe\xae\x44\x39\x22\xae\xfe\xab\x54\x6c\x77\x95\xfa\xc6\x2e\x4e\x62" "\xef\xc3\x88\xf8\xe2\xa0\xfa\x97\x62\x2e\x1f\x03\xe9\xce\x7c\x7a\x34\x7e" "\x16\xfb\xb9\xb1\xc6\x4f\x9e\x88\x9f\xe4\xc7\xba\xeb\xec\xef\xe2\x0b\xa7" "\x90\x0b\x4c\x9b\x4f\xb2\xf6\xe7\xed\x41\xf7\x5f\x12\x37\xf3\xf5\xe0\xfb" "\xbf\x92\xb7\x50\x27\x57\xb4\x7f\xd9\xa5\x96\x0f\xf2\x36\xf0\x71\xfc\xee" "\xf5\x3f\xcb\xdb\x9a\x41\xed\xdf\xcd\x51\x63\xbc\xfe\xbb\xef\x75\x4b\x57" "\x9e\x3e\xf6\x61\xc4\x97\x2f\x47\xf4\x62\x1f\xf4\xb5\x3f\xbd\xf6\xb7\x34" "\x24\xfe\x6b\x23\xc6\xff\xcb\x57\x5e\x7a\x65\xd8\xb1\xf4\xd7\x11\xb7\x62" "\x70\xfc\xfe\x58\x0b\x9d\xe6\xe6\x42\x7b\x67\xf7\xce\x5a\x73\x69\xb5\xbe" "\x5a\xdf\xa8\xd5\xee\x2f\xde\xbf\xfb\xe6\xbd\x37\x6a\x0b\xf9\x18\xf5\xc2" "\xf0\xde\xe0\xb3\xb7\x6e\x5f\x1f\x76\x2c\xab\xff\xd5\x21\xf1\x2b\xc7\xd4" "\xff\xeb\x23\xd6\xff\xe3\xff\xbe\xf7\xa3\xaf\x3d\x23\xfe\x37\x5f\x1d\x14" "\x3f\x89\x17\x9f\x11\x3f\xeb\x13\xbf\x31\x62\xfc\xa5\xab\xbf\xad\x0c\x3b" "\x96\xc5\x5f\x19\x52\xff\xe3\x3e\xff\xdb\x23\xc6\xff\xf4\xaf\xbb\x4f\x4d" "\x1b\x0e\x00\x4c\x4e\xbb\xb2\xbb\xbe\xd4\x68\xd4\xb7\xda\x3b\xc3\x0b\xd7" "\x0f\x22\x8e\x3b\x67\x9c\x85\xa4\x97\xfc\x49\x2f\x18\xa3\x9d\xfc\xfb\x22" "\xde\x79\xa8\xfb\x74\x17\xb2\x4f\xe1\x1c\xa4\x31\xb0\xf0\x9d\xbe\x3d\xd7" "\xe2\x0c\x63\xcd\x0c\xb9\x19\x7f\xfe\x6a\xf7\xc7\x74\x36\xa2\xff\x07\x3b" "\x4d\x8f\x9c\xdc\x7b\x18\x78\x76\xac\x61\x2d\xc6\x69\x8c\xba\x01\xe7\xc1" "\xe1\x4d\x1f\x11\xff\x99\x74\x32\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\xc0\x40\xe3\xf8\x76\xd4\xa4\xeb\x08\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\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\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\xc5\xf5" "\xbf\x00\x00\x00\xff\xff\x1b\x6b\xc2\x08", 1324); syz_mount_image(/*fs=*/0x20000180, /*dir=*/0x20000540, /*flags=MS_SILENT|MS_NODIRATIME*/ 0x8800, /*opts=*/0x20000500, /*chdir=*/1, /*size=*/0x52c, /*img=*/0x20000580); // syz_open_dev$loop arguments: [ // dev: ptr[in, buffer] { // buffer: {2f 64 65 76 2f 6c 6f 6f 70 23 00} (length 0xb) // } // id: intptr = 0x0 (8 bytes) // flags: open_flags = 0x2 (8 bytes) // ] // returns fd_loop memcpy((void*)0x20000100, "/dev/loop#\000", 11); res = -1; res = syz_open_dev(/*dev=*/0x20000100, /*id=*/0, /*flags=O_RDWR*/ 2); if (res != -1) r[0] = res; // pwrite64 arguments: [ // fd: fd (resource) // buf: ptr[in, buffer] { // buffer: {50 14 6f e0 97 73 9d 2d 08 00 00 00 00 00 00 00 00 00 00 00 // 00 00 00 00 c6 85 73 f6 4e 1a 45 ca 82 65 f5 7f 48 ba 6d 81} (length // 0x28) // } // count: len = 0x28 (8 bytes) // pos: intptr = 0x1000 (8 bytes) // ] memcpy((void*)0x20001000, "\x50\x14\x6f\xe0\x97\x73\x9d\x2d\x08\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\xc6\x85\x73\xf6\x4e\x1a\x45\xca\x82\x65" "\xf5\x7f\x48\xba\x6d\x81", 40); syscall(__NR_pwrite64, /*fd=*/r[0], /*buf=*/0x20001000ul, /*count=*/0x28ul, /*pos=*/0x1000ul); // mkdirat arguments: [ // fd: fd_dir (resource) // path: ptr[in, buffer] { // buffer: {2e 2f 73 79 73 00} (length 0x6) // } // mode: open_mode = 0x1ff (8 bytes) // ] memcpy((void*)0x20000200, "./sys\000", 6); syscall( __NR_mkdirat, /*fd=*/0xffffff9c, /*path=*/0x20000200ul, /*mode=S_IXOTH|S_IWOTH|S_IROTH|S_IXGRP|S_IWGRP|S_IRGRP|S_IXUSR|S_IWUSR|0x100*/ 0x1fful); // mount arguments: [ // src: nil // dst: ptr[in, buffer] { // buffer: {2e 2f 73 79 73 00} (length 0x6) // } // type: ptr[in, buffer] { // buffer: {73 79 73 66 73 00} (length 0x6) // } // flags: mount_flags = 0x0 (8 bytes) // data: nil // ] memcpy((void*)0x20000200, "./sys\000", 6); memcpy((void*)0x20000240, "sysfs\000", 6); syscall(__NR_mount, /*src=*/0ul, /*dst=*/0x20000200ul, /*type=*/0x20000240ul, /*flags=*/0ul, /*data=*/0ul); // openat arguments: [ // fd: fd_dir (resource) // file: ptr[in, buffer] { // buffer: {2e 2f 73 79 73 2f 66 73 2f 62 63 61 63 68 65 2f 72 65 67 69 // 73 74 65 72 00} (length 0x19) // } // flags: open_flags = 0x1 (4 bytes) // mode: open_mode = 0x0 (2 bytes) // ] // returns fd memcpy((void*)0x20000300, "./sys/fs/bcache/register\000", 25); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000300ul, /*flags=O_WRONLY*/ 1, /*mode=*/0); if (res != -1) r[1] = res; // write arguments: [ // fd: fd (resource) // buf: ptr[in, buffer] { // buffer: {2f 64 65 76 2f 6c 6f 6f 70 30} (length 0xa) // } // count: len = 0xa (8 bytes) // ] memcpy((void*)0x20000400, "/dev/loop0", 10); syscall(__NR_write, /*fd=*/r[1], /*buf=*/0x20000400ul, /*count=*/0xaul); } int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x20000000ul, /*len=*/0x1000000, /*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=*/0x1000, /*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; }