// https://syzkaller.appspot.com/bug?id=fb00b8b809677cea9a0d4cea16da75e4efc1fdd3 // 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$ext4 arguments: [ // fs: ptr[in, buffer] { // buffer: {65 78 74 34 00} (length 0x5) // } // dir: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8) // } // flags: mount_flags = 0x10000 (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 { // grpid: buffer: {67 72 70 69 64} (length 0x5) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // auto_da_alloc: buffer: {61 75 74 6f 5f 64 61 5f 61 6c 6c 6f // 63} (length 0xd) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // lazytime: buffer: {6c 61 7a 79 74 69 6d 65} (length 0x8) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // dioread_nolock: buffer: {64 69 6f 72 65 61 64 5f 6e 6f 6c 6f // 63 6b} (length 0xe) // } // comma: const = 0x2c (1 bytes) // } // } // common: array[fs_opt_elem[fs_options_common]] { // } // null: const = 0x0 (1 bytes) // } // } // chdir: int8 = 0x3 (1 bytes) // size: len = 0x4d4 (8 bytes) // img: ptr[in, buffer] { // buffer: (compressed buffer with length 0x4d4) // } // ] // returns fd_dir memcpy((void*)0x200000000040, "ext4\000", 5); memcpy((void*)0x200000000000, "./file1\000", 8); memcpy((void*)0x200000000100, "grpid", 5); *(uint8_t*)0x200000000105 = 0x2c; memcpy((void*)0x200000000106, "auto_da_alloc", 13); *(uint8_t*)0x200000000113 = 0x2c; memcpy((void*)0x200000000114, "lazytime", 8); *(uint8_t*)0x20000000011c = 0x2c; memcpy((void*)0x20000000011d, "dioread_nolock", 14); *(uint8_t*)0x20000000012b = 0x2c; *(uint8_t*)0x20000000012c = 0; memcpy( (void*)0x200000000180, "\x78\x9c\xec\xdc\xcf\x6f\x14\x65\x1f\x00\xf0\xef\x6c\x77\x69\x81\x97\xd7" "\x8a\x88\x82\x28\x05\x34\x36\x26\xb6\x50\x50\x38\x78\xc1\xc4\xc4\x83\x26" 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"\x86\x49\xd3\x34\xed\x6f\xff\xf1\x6c\xda\xec\xe6\xa2\x25\xc0\x96\x95\xc4" "\x66\x97\x00\xd8\x1c\xc5\x17\x7d\xf6\xfb\xb7\x78\x6d\x50\xd7\xe3\xb1\x70" "\xef\x74\xfd\x07\x50\x56\xef\x87\xf9\xab\xfe\x49\x39\x4a\x79\x9a\x4a\xd3" "\xef\xdb\xb5\x34\x14\x11\x1f\xcf\xfe\xfb\x4d\xf6\x8a\x4e\xe3\x10\x7f\xae" "\x53\x01\x00\x80\x9e\xf3\xcb\xe9\xa2\x27\xd8\xdc\xff\x2b\xc5\xde\x86\x74" "\xff\xcf\xe7\x50\x06\x23\xe2\xe9\x88\xd8\x1d\x11\xcf\x44\xc4\x9e\x88\x78" "\x36\xa2\x96\xf6\xb9\x88\x78\xbe\x39\x83\x24\x22\xed\x90\xff\x9e\xa6\xf8" "\x7c\xfe\x3f\xe6\xb3\x08\xa5\xbb\xab\xae\x64\x07\x59\xff\xef\xad\x7c\x6e" "\x6b\x61\xff\xaf\xe8\xfd\xc5\x60\x5f\x1e\xdb\x15\x51\x74\x98\xa7\x8e\xe6" "\xfb\x64\x38\x2a\xfd\x9f\x9c\xaf\x4e\x1d\x6b\xb3\xfd\x6d\x4b\xe4\xdf\xd8" "\xff\xcb\x5e\x59\xfe\x45\x5f\x30\x2f\xc7\xdd\x72\xd3\x00\xdd\xe4\xf8\xcc" "\xf8\xca\x6a\xbb\xd8\xbd\x9b\x11\xfb\xcb\xcd\xf5\x4f\xca\xd9\x81\x2b\xa6" "\x71\x92\x88\xd8\x17\x11\xfb\xbb\xd8\xee\x60\x43\xf8\xfc\x6b\xdf\x1d\x98" "\x8b\x54\xf2\xf7\xaf\xeb\x6f\x4b\xd7\xbf\x26\x6d\x31\xa5\xd7\xf5\x7c\x5c" "\x2b\xe9\xb7\x11\xaf\xd6\x8f\xff\x6c\x34\x1e\xff\x64\x3e\xc7\xa4\xf3\xfc" "\xe4\xe8\x40\x54\xa7\x8e\x8e\x66\x67\xc1\xd1\x96\x79\xfc\xf6\xfb\xad\x0f" "\xda\xe5\xbf\x64\xfd\x7f\xfa\xab\x79\x95\x77\x4e\xfe\x7c\x66\xd5\xf5\x2e" "\x64\xc7\x7f\x47\xc3\xf9\x1f\xc5\xfc\xed\xfc\x24\xea\x60\x12\x91\xcc\xcd" "\xd7\x4e\x47\xa4\x7d\xdd\xe5\x71\xeb\x8f\xf6\x2b\xac\xf4\xfc\xdf\x96\x7c" "\x54\x0b\x17\xed\xeb\xf3\xf1\x99\x99\x2b\xc7\x22\xb6\x25\xef\x2d\x5e\x3e" "\x36\xbf\x6e\x11\x2f\xd2\x67\xf5\x1f\x3e\xd2\xba\xfd\xef\xce\xd7\xc9\xf6" "\xc4\x0b\x11\x91\x9d\xc4\x2f\x46\xc4\x4b\x11\x71\x30\x2f\xfb\xa1\x88\x38" "\x1c\x11\x47\x3a\xd4\xff\xd7\xb7\x5f\xfe\x74\xe5\xf5\x5f\x5f\x59\xfd\x27" "\x5b\x5e\xff\x16\x1c\xff\xf9\xf9\xfa\x65\x06\x8a\x95\xb3\x25\x7d\x17\x0e" "\xdd\x79\xd4\xe6\xe2\xb1\xbc\xe3\x7f\xa2\x16\x1a\xce\x97\xb4\xbe\xfe\x25" "\x0b\x2e\x11\xcb\x2d\xe9\xea\xf6\x1e\x00\x00\x00\x6c\x0d\xa5\xa8\xfd\xef" "\x7f\x69\x64\x2e\x5c\x2a\x8d\x8c\xd4\xc7\x80\xf6\xc4\x8e\x52\xf5\xf2\xf4" "\xcc\xc1\x88\xb8\x34\x59\xbf\x47\x60\x30\x2a\xa5\x62\xa4\xab\x3e\x1e\x5c" "\x49\x8a\xf1\xcf\xc1\x86\xf8\x58\x53\xfc\x78\x3e\x6e\xfc\x55\xdf\xf6\x5a" "\x7c\x64\xe2\x72\x75\x72\xb3\x2b\x0f\x3d\x6e\x67\xad\xcd\x27\x8b\xda\x7f" "\xe6\xef\x2e\xc7\x79\x81\x2d\x68\x0d\xe6\xd1\x80\x2d\x6a\xa9\xf6\xbf\xf7" "\xf6\x06\x15\x04\xd8\x70\xbe\xff\xa1\x77\x35\xb4\xff\xd9\x36\x49\x66\xfd" "\xa7\x0c\x3c\x99\x7c\xff\x43\xef\x6a\xd5\xfe\x6f\xc4\xf7\x1d\xef\x5d\x70" "\xcd\x80\xad\x2f\xd5\x96\xa1\xa7\x69\xff\xd0\xbb\xca\xf1\xe1\x5c\xb8\x76" "\xdb\x73\xcb\xbb\x6d\x81\x27\x91\xef\x7f\xe8\x49\xdd\xde\xd7\xbf\x9c\x40" "\xf1\xb8\x86\x6b\x17\xd2\xfe\xd6\x69\x06\xa2\xc5\x13\x03\x06\xd6\xb8\x18" "\x79\x60\x7b\x8b\xbc\x36\x25\x90\xf5\xac\xd6\x70\x83\x95\x88\x58\x5e\xe2" "\xed\x2b\xc9\xa2\xe8\x02\xb6\x7f\xc2\x43\xa9\xbb\x0d\xf6\xc7\xe2\x8f\xfa" "\xa2\xd3\x5a\x49\x17\xcf\x71\x28\x02\xd9\x5e\x59\x32\xf1\xb9\xbd\x6b\x7e" "\xf2\x17\xcf\x44\x59\xeb\xd3\xe6\x87\xf9\x76\x5a\x69\x38\x16\xe5\xa5\x8e" "\xce\xea\x03\x1b\x7a\x19\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\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x58\x37\xff\x05\x00\x00\xff\xff\x26\x89\xcf\x1a", 1236); syz_mount_image(/*fs=*/0x200000000040, /*dir=*/0x200000000000, /*flags=MS_POSIXACL*/ 0x10000, /*opts=*/0x200000000100, /*chdir=*/3, /*size=*/0x4d4, /*img=*/0x200000000180); // openat arguments: [ // fd: fd_dir (resource) // file: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8) // } // flags: open_flags = 0x181242 (4 bytes) // mode: open_mode = 0x148 (2 bytes) // ] // returns fd memcpy((void*)0x200000000180, "./file1\000", 8); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x200000000180ul, /*flags=O_TRUNC|O_SYNC|O_CREAT|O_CLOEXEC|O_RDWR*/ 0x181242, /*mode=S_IXGRP|S_IXUSR|S_IRUSR*/ 0x148); if (res != -1) r[0] = res; // pwrite64 arguments: [ // fd: fd (resource) // buf: ptr[in, buffer] { // buffer: {32} (length 0x1) // } // count: len = 0xfdef (8 bytes) // pos: intptr = 0xfecc (8 bytes) // ] memset((void*)0x200000000140, 50, 1); syscall(__NR_pwrite64, /*fd=*/r[0], /*buf=*/0x200000000140ul, /*count=*/0xfdeful, /*pos=*/0xfeccul); // syz_mount_image$ext4 arguments: [ // fs: ptr[in, buffer] { // buffer: {65 78 74 34 00} (length 0x5) // } // dir: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8) // } // flags: mount_flags = 0x0 (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 { // init_itable: buffer: {69 6e 69 74 5f 69 74 61 62 6c 65} // (length 0xb) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // dioread_nolock: buffer: {64 69 6f 72 65 61 64 5f 6e 6f 6c 6f // 63 6b} (length 0xe) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // debug_want_extra_isize: fs_opt["debug_want_extra_isize", // fmt[hex, int32]] { // name: buffer: {64 65 62 75 67 5f 77 61 6e 74 5f 65 78 74 72 // 61 5f 69 73 69 7a 65} (length 0x16) eq: const = 0x3d (1 // bytes) val: int32 = 0x5a (18 bytes) // } // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // grpid: buffer: {67 72 70 69 64} (length 0x5) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // dioread_nolock: buffer: {64 69 6f 72 65 61 64 5f 6e 6f 6c 6f // 63 6b} (length 0xe) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // bsdgroups: buffer: {62 73 64 67 72 6f 75 70 73} (length 0x9) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // min_batch_time: fs_opt["min_batch_time", fmt[hex, int32]] { // name: buffer: {6d 69 6e 5f 62 61 74 63 68 5f 74 69 6d 65} // (length 0xe) eq: const = 0x3d (1 bytes) val: int32 = 0x3 (18 // bytes) // } // } // 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 = 0x47a (8 bytes) // img: ptr[in, buffer] { // buffer: (compressed buffer with length 0x47a) // } // ] // returns fd_dir memcpy((void*)0x200000000180, "ext4\000", 5); memcpy((void*)0x200000000000, "./file1\000", 8); memcpy((void*)0x2000000001c0, "init_itable", 11); *(uint8_t*)0x2000000001cb = 0x2c; memcpy((void*)0x2000000001cc, "dioread_nolock", 14); *(uint8_t*)0x2000000001da = 0x2c; memcpy((void*)0x2000000001db, "debug_want_extra_isize", 22); *(uint8_t*)0x2000000001f1 = 0x3d; sprintf((char*)0x2000000001f2, "0x%016llx", (long long)0x5a); *(uint8_t*)0x200000000204 = 0x2c; memcpy((void*)0x200000000205, "grpid", 5); *(uint8_t*)0x20000000020a = 0x2c; memcpy((void*)0x20000000020b, "dioread_nolock", 14); *(uint8_t*)0x200000000219 = 0x2c; memcpy((void*)0x20000000021a, "bsdgroups", 9); *(uint8_t*)0x200000000223 = 0x2c; memcpy((void*)0x200000000224, "min_batch_time", 14); *(uint8_t*)0x200000000232 = 0x3d; sprintf((char*)0x200000000233, "0x%016llx", (long long)3); *(uint8_t*)0x200000000245 = 0x2c; *(uint8_t*)0x200000000246 = 0; memcpy( (void*)0x2000000006c0, "\x78\x9c\xec\xdb\xcf\x6f\x14\x55\x1c\x00\xf0\xef\xcc\xb6\x05\x14\x28\x22" "\xfe\x00\x51\xab\xc4\xa4\xd1\xd8\xd2\x82\xca\xc1\x8b\x46\x13\x63\x30\x9a" "\xe8\x01\x8f\xb5\x5d\x48\xc3\x42\x0d\xad\x46\x90\x48\x31\xc6\x93\x89\x21" "\xd1\x33\xf1\x68\xf4\x2f\xf0\x66\x4c\x8c\x7a\x32\xe1\xea\xc9\x93\x21\x21" "\xca\x05\xf0\x54\x33\xb3\x33\xb0\x5d\xb6\x2d\xd8\x5d\xb6\x74\x3f\x9f\x64" "\xb7\xef\xed\xbc\xd9\x79\xdf\xbe\xf9\xf1\xe6\xbd\x9d\x00\x7a\xd6\x50\xf6" "\x96\x44\x6c\x8e\x88\x3f\x22\x62\xb0\x9e\x5d\x5c\x60\xa8\xfe\xe7\xea\xe5" "\xd3\x93\xd7\x2e\x9f\x9e\x4c\x62\x61\xe1\xed\xbf\x93\xbc\xdc\x95\xcb\xa7" "\x27\xcb\xa2\xe5\x7a\xf7\x16\x99\xe1\x34\x22\xfd\x2c\x29\x36\xb2\xd8\xec" "\xc9\x53\x47\x27\x6a\xb5\xea\x89\x22\x3f\x3a\x77\xec\xfd\xd1\xd9\x93\xa7" "\x9e\xfd\xf0\xd8\xc4\x91\xea\x91\xea\xf1\xf1\x03\x07\xf6\xef\x1b\x7b\xe1" "\xf9\xf1\xe7\xda\x12\x67\x16\xd7\x95\x5d\x9f\xcc\xec\xde\xf9\xda\xbb\xe7" "\xde\x98\x3c\x74\xee\xbd\x5f\xbf\xcf\xea\xbb\xb9\x58\xde\x18\x47\xbb\x0c" "\x65\x81\xff\xb3\x90\x6b\x5e\xf6\x54\xbb\x37\xd6\x65\x5b\x1a\xd2\x49\x5f" "\x17\x2b\xc2\x6d\xa9\x44\x44\xd6\x5c\xfd\xf9\xf1\x3f\x18\x95\xb8\xd1\x78" "\x83\xf1\xea\xa7\x5d\xad\x1c\xd0\x51\xd9\xb5\x69\xc3\xd2\x8b\xe7\x17\x80" "\x75\x2c\x89\x6e\xd7\x00\xe8\x8e\xf2\x42\x9f\xdd\xff\x96\xaf\x3b\xd4\xf5" "\x58\x13\x2e\xbd\x54\xbf\x01\xca\xe2\xbe\x5a\xbc\xea\x4b\xfa\x22\x2d\xca" "\xf4\x37\xdd\xdf\xb6\xd3\x50\x44\x1c\x9a\xff\xf7\x7c\xf6\x8a\x0e\x8d\x43" "\x00\x00\x34\xfa\x62\xf2\xeb\x83\x03\x11\xf1\xf1\xb5\xef\x5e\xcf\xfa\x1e" "\x83\x11\x51\x8e\x07\x3d\x98\xbf\xff\x99\xbf\x6f\x2d\xe6\x50\xb6\x45\xc4" "\x7d\x11\xb1\x3d\x22\xee\x8f\x88\x1d\x11\xf1\x40\x51\xf6\xa1\x88\x78\x78" "\x95\xf5\xb9\xb9\xff\x93\x5e\x5c\xe5\x57\x2e\x2b\xeb\xff\xbd\x58\xcc\x6d" "\x2d\xee\xff\x95\xbd\xbf\xd8\x56\x29\x72\x5b\xf2\xf8\xfb\x93\xc3\xd3\xb5" "\xea\xde\xd8\x90\xff\x4f\x86\xa3\x7f\x43\x96\x1f\x5b\x66\x1b\x3f\xbe\x72" "\xe1\xcb\xa5\x96\x35\xf6\xff\xb2\x57\xb6\xfd\xb2\x2f\x58\xd4\xe3\x62\x5f" "\xd3\x00\xdd\xd4\xc4\xdc\x44\xde\x29\x6d\x83\x4b\x67\x23\x76\xf5\xb5\x8a" "\x3f\xb9\x3e\x13\x90\x44\xc4\xce\x88\xd8\xb5\x78\xd5\x4d\x2b\x7c\xf5\xd6" "\x32\x31\xfd\xf4\xb7\xbb\x97\x2a\xd4\x3a\xfe\x2b\xe7\x6f\xa9\xf2\x6d\x98" "\x67\x5a\xf8\x26\x0b\x6f\x3e\x8b\x7f\x3e\x9a\xe2\x2f\x25\x8d\xf3\x93\xd3" "\x37\xcd\x4f\x8e\x6e\x8c\x5a\x75\xef\x68\x7d\xaf\x68\xe5\xb7\xdf\x3f\x7f" "\x6b\xa9\xed\xaf\xdc\xfe\x9d\x75\xa9\x5a\xff\xdb\xd0\xfe\xcd\x45\xb6\x25" "\x8d\xf3\xb5\xb3\xed\xdd\xfe\xff\xdc\xff\xd3\x81\xe4\x9d\x7c\x9e\x79\xa0" "\xf8\xec\xa3\x89\xb9\xb9\x13\x63\x11\x03\xc9\xc1\x3c\xbf\xe8\xf3\xf1\x1b" "\xeb\x96\xf9\xb2\x7c\xb6\xff\x0f\xef\x69\x7d\xfc\x6f\x2f\xd6\xc9\xe2\x7f" "\x24\x22\xb2\x9d\xf8\xd1\x88\x78\x2c\x22\x1e\x2f\xea\xfe\x44\x44\x3c\x19" 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"\x89\x8d\x6b\xa3\x1a\xdd\x49\xac\xd5\x46\xc9\x13\x11\x65\x22\x5d\x13\xf5" "\x91\xe8\x50\xa2\xdb\x67\x26\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\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\xf6\xf8\x2f\x00\x00\xff\xff\xd3\x2a\xe6\xcf", 1146); syz_mount_image(/*fs=*/0x200000000180, /*dir=*/0x200000000000, /*flags=*/0, /*opts=*/0x2000000001c0, /*chdir=*/1, /*size=*/0x47a, /*img=*/0x2000000006c0); } int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*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=*/0x200001000000ul, /*len=*/0x1000, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); const char* reason; (void)reason; for (procid = 0; procid < 5; procid++) { if (fork() == 0) { use_temporary_dir(); loop(); } } sleep(1000000); return 0; }