// https://syzkaller.appspot.com/bug?id=7a185609aa78b2069b780ea42fae8d00029ea41c // 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 #include #include #ifndef __NR_bpf #define __NR_bpf 321 #endif #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 thread_start(void* (*fn)(void*), void* arg) { pthread_t th; pthread_attr_t attr; pthread_attr_init(&attr); pthread_attr_setstacksize(&attr, 128 << 10); int i = 0; for (; i < 100; i++) { if (pthread_create(&th, &attr, fn, arg) == 0) { pthread_attr_destroy(&attr); return; } if (errno == EAGAIN) { usleep(50); continue; } break; } exit(1); } typedef struct { int state; } event_t; static void event_init(event_t* ev) { ev->state = 0; } static void event_reset(event_t* ev) { ev->state = 0; } static void event_set(event_t* ev) { if (ev->state) exit(1); __atomic_store_n(&ev->state, 1, __ATOMIC_RELEASE); syscall(SYS_futex, &ev->state, FUTEX_WAKE | FUTEX_PRIVATE_FLAG, 1000000); } static void event_wait(event_t* ev) { while (!__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE)) syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, 0); } static int event_isset(event_t* ev) { return __atomic_load_n(&ev->state, __ATOMIC_ACQUIRE); } static int event_timedwait(event_t* ev, uint64_t timeout) { uint64_t start = current_time_ms(); uint64_t now = start; for (;;) { uint64_t remain = timeout - (now - start); struct timespec ts; ts.tv_sec = remain / 1000; ts.tv_nsec = (remain % 1000) * 1000 * 1000; syscall(SYS_futex, &ev->state, FUTEX_WAIT | FUTEX_PRIVATE_FLAG, 0, &ts); if (__atomic_load_n(&ev->state, __ATOMIC_ACQUIRE)) return 1; now = current_time_ms(); if (now - start > timeout) return 0; } } 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"); } 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; } 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"); } struct thread_t { int created, call; event_t ready, done; }; static struct thread_t threads[16]; static void execute_call(int call); static int running; static void* thr(void* arg) { struct thread_t* th = (struct thread_t*)arg; for (;;) { event_wait(&th->ready); event_reset(&th->ready); execute_call(th->call); __atomic_fetch_sub(&running, 1, __ATOMIC_RELAXED); event_set(&th->done); } return 0; } static void execute_one(void) { if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } int i, call, thread; for (call = 0; call < 6; call++) { for (thread = 0; thread < (int)(sizeof(threads) / sizeof(threads[0])); thread++) { struct thread_t* th = &threads[thread]; if (!th->created) { th->created = 1; event_init(&th->ready); event_init(&th->done); event_set(&th->done); thread_start(thr, th); } if (!event_isset(&th->done)) continue; event_reset(&th->done); th->call = call; __atomic_fetch_add(&running, 1, __ATOMIC_RELAXED); event_set(&th->ready); if (call == 1) break; event_timedwait(&th->done, 50 + (call == 1 ? 4000 : 0) + (call == 5 ? 500 : 0)); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); } static void execute_one(void); #define WAIT_FLAGS __WALL static void loop(void) { int iter = 0; for (;; iter++) { reset_loop(); int pid = fork(); if (pid < 0) exit(1); if (pid == 0) { 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; } } } uint64_t r[1] = {0xffffffffffffffff}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: memcpy((void*)0x400000000040, "./bus\000", 6); syscall(__NR_creat, /*file=*/0x400000000040ul, /*mode=*/0ul); break; case 1: memcpy((void*)0x400000000040, "ext4\000", 5); memcpy((void*)0x400000000000, "./bus\000", 6); memcpy((void*)0x400000000280, "errors=remount-ro", 17); *(uint8_t*)0x400000000291 = 0x2c; memcpy((void*)0x400000000292, "nodelalloc", 10); *(uint8_t*)0x40000000029c = 0x2c; memcpy((void*)0x40000000029d, "debug_want_extra_isize", 22); *(uint8_t*)0x4000000002b3 = 0x3d; sprintf((char*)0x4000000002b4, "0x%016llx", (long long)0x32); *(uint8_t*)0x4000000002c6 = 0x2c; memcpy((void*)0x4000000002c7, "inode_readahead_blks", 20); *(uint8_t*)0x4000000002db = 0x3d; sprintf((char*)0x4000000002dc, "0x%016llx", (long long)0x10000); *(uint8_t*)0x4000000002ee = 0x2c; memcpy((void*)0x4000000002ef, "block_validity", 14); *(uint8_t*)0x4000000002fd = 0x2c; memcpy((void*)0x4000000002fe, "quota", 5); *(uint8_t*)0x400000000303 = 0x2c; *(uint8_t*)0x400000000304 = 0; memcpy( (void*)0x400000000ec0, "\x78\x9c\xec\xdb\xcb\x6f\x1b\x45\x18\x00\xf0\x6f\xd7\x49\x4b\x5f\x24" "\x94\xf2\xe8\x03\x08\x14\x44\xc4\x23\x69\xd2\x02\x3d\x70\x00\x04\x12" "\x07\x90\x90\xb8\x94\x63\x48\xd2\xaa\xd4\x6d\x50\x13\x24\x5a\x55\x50" "\x10\x2a\x47\x54\x89\x3b\xe2\x88\xc4\x5f\xc0\x09\x2e\x08\x38\x21\x71" "\x85\x3b\xaa\x54\xa1\x5e\x28\x9c\x8c\xd6\xde\xad\x1f\xb5\x4d\x92\x3a" "\x59\xa8\x7f\x3f\x69\x9b\x99\xdd\xb1\x67\x3e\xcf\x8e\x3d\xbb\xd3\x0d" "\x60\x68\x4d\x64\xff\x24\x11\x3b\x23\xe2\xd7\x88\x18\x6b\x64\xdb\x0b" "\x4c\x34\xfe\x5c\xbf\x76\x61\xfe\xaf\x6b\x17\xe6\x93\xa8\xd5\xde\xfc" "\x23\xa9\x97\xfb\xf3\xda\x85\xf9\xa2\x68\xf1\xba\x1d\x79\x66\x32\x8d" "\x48\x3f\x49\x62\x7f\x97\x7a\x97\xcf\x9d\x3f\x35\x57\xad\x2e\x9e\xcd" "\xf3\xd3\x2b\xa7\xdf\x9d\x5e\x3e\x77\xfe\xe9\x93\xa7\xe7\x4e\x2c\x9e" "\x58\x3c\x33\x7b\xf4\xe8\x91\xc3\x33\xcf\x3d\x3b\xfb\xcc\x40\xe2\xbc" "\x2b\x6b\xeb\xbe\x0f\x96\x0e\xec\x7d\xf5\xad\xcb\xaf\xcf\x1f\xbb\xfc" "\xf6\x8f\x5f\x27\x45\xfc\x1d\x71\x0c\xc8\x44\xbf\x83\x8f\xd5\x6a\x03" "\xae\xae\x5c\xbb\x5a\xd2\xc9\x48\x89\x0d\x61\x4d\x2a\x11\x91\x75\xd7" "\x68\x7d\xfc\x8f\x45\x25\x9a\x9d\x37\x16\xaf\x7c\x5c\x6a\xe3\x80\x0d" "\x55\xcb\xf5\x38\x7c\xb1\x06\xdc\xc6\x92\x28\xbb\x05\x40\x39\x8a\x1f" "\xfa\xec\xfa\xb7\xd8\x36\x6f\xf6\x51\xbe\xab\x2f\x36\x2e\x80\xb2\xb8" "\xaf\xe7\x5b\xe3\xc8\x48\xa4\xd1\xb8\x30\x1a\xed\xb8\xbe\x1d\xa4\x89" "\x88\x38\x76\xf1\xef\x2f\xb2\x2d\x36\xe6\x3e\x04\x00\x40\x9b\x6f\xb3" "\xf9\xcf\x53\xdd\xe6\x7f\x69\xdc\xdb\x52\xee\xce\x7c\x6d\x68\x3c\x5f" "\x4b\xd9\x1d\x11\x77\x47\xc4\x9e\x88\xb8\x27\xa2\x5e\xf6\xbe\x88\xb8" "\x7f\x8d\xf5\x77\x2e\x92\xdc\x3c\xff\x49\xaf\xac\x2b\xb0\x55\xca\xe6" "\x7f\xcf\xe7\x6b\x5b\xed\xf3\xbf\xb4\x28\x32\x5e\xc9\x73\xbb\xea\x99" "\xd1\xe4\xf8\xc9\xea\xe2\xa1\xfc\x33\x99\x8c\xd1\xad\x59\x7e\xa6\x4f" "\x1d\xdf\xbd\xfc\xcb\x67\xbd\x8e\xb5\xce\xff\xb2\x2d\xab\xbf\x98\x0b" "\xe6\xed\xb8\x32\xb2\xb5\xfd\x35\x0b\x73\x2b\x73\xb7\x12\x73\xab\xab" "\x1f\x45\xec\x1b\xe9\x16\x7f\x72\x63\x25\x20\x89\x88\xbd\x11\xb1\x6f" "\x9d\x75\x9c\x7c\xe2\xab\x03\xbd\x8e\x75\xc6\x5f\x4b\xfa\xbd\xd3\x0b" "\xed\xd9\x01\xac\x33\xd5\xbe\x8c\x78\xbc\xd1\xff\x17\xa3\x23\xfe\x42" "\xd2\x7f\x7d\x72\xfa\x8e\xa8\x2e\x1e\x9a\x2e\xce\x8a\x9b\xfd\xf4\xf3" "\xa5\x37\x7a\xd5\xff\xef\xfd\xbf\xb1\xb2\xfe\xdf\xde\xf5\xfc\xbf\x11" "\xff\x78\xd2\xba\x5e\xbb\xbc\xf6\x3a\x2e\xfd\xf6\x69\xcf\x6b\x9a\xa9" "\x75\x9d\xff\xcd\x1d\x5b\xf2\xbf\xef\xcf\xad\xac\x9c\x9d\x89\xd8\x92" "\xbc\xd6\x68\x74\xeb\xfe\xd9\xe6\x6b\x8b\x7c\x51\x3e\x8b\x7f\xf2\x60" "\xf7\xf1\xbf\x3b\x9a\x9f\xc4\xfe\x88\xc8\x4e\xe2\x07\x22\xe2\xc1\x88" "\x78\x28\xef\xbb\x87\x23\xe2\x91\x88\x38\xd8\x19\x58\xda\x4c\xfe\xf0" "\xd2\xa3\xef\xf4\x8a\xff\xbf\xd0\xff\x0b\x1d\xfd\x3f\xde\x5e\xa4\xa3" "\xff\x9b\x89\x2d\xd1\xb9\xa7\x7b\xa2\x72\xea\xfb\x6f\xda\xdf\xb1\x99" "\x5c\xdd\xf7\xdf\x91\x7a\x6a\x32\xdf\xb3\x9a\xef\xbf\xd6\x56\x24\x7d" "\x1a\x78\x4b\x1f\x1e\x00\x00\x00\xfc\x4f\xa4\x11\xb1\x33\x92\x74\xea" "\x46\x3a\x4d\xa7\xa6\x1a\xff\x87\x7f\x4f\x6c\x4f\xab\x4b\xcb\x2b\x4f" "\x1e\x5f\x7a\xef\xcc\x42\xe3\x19\x81\xf1\x18\x4d\x8b\x3b\x5d\x8d\xfb" "\xc1\x8d\xfb\xa1\x33\xf9\x65\x7d\x91\x9f\xed\xc8\x1f\xce\xef\x1b\x7f" "\x5e\xd9\x56\xcf\x4f\xcd\x2f\x55\x17\xca\x0e\x1e\x86\xdc\x8e\x1e\xe3" "\x3f\xf3\x7b\xa5\xec\xd6\x01\x1b\xce\xf3\x5a\x30\xbc\x8c\x7f\x18\x5e" "\xc6\x3f\x0c\x2f\xe3\x1f\x86\x57\x97\xf1\xbf\xad\x8c\x76\x00\x9b\xaf" "\xdb\xef\xff\x87\xcd\x64\x6d\x6c\x33\x1b\x03\x6c\xaa\x8e\xf1\x6f\xd9" "\x0f\x86\x88\xeb\x7f\x18\x5e\xc6\x3f\x0c\xaf\xd6\xf1\xdf\xf7\xf9\x7b" "\xe0\x76\xb2\xbc\x2d\xfa\x3f\xbc\x2f\x21\xd1\x35\x11\x69\x69\xb5\xa7" "\x03\x7f\xe7\x64\x83\x47\xc1\xce\xf2\xfb\x6b\xad\x89\xb2\xbf\x99\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x06\xe3\x9f\x00\x00\x00\xff\xff\x33\xdc\xe4" "\xae", 1106); syz_mount_image( /*fs=*/0x400000000040, /*dir=*/0x400000000000, /*flags=MS_LAZYTIME|MS_NOSUID|MS_NOEXEC|MS_NODEV|0x100*/ 0x200010e, /*opts=*/0x400000000280, /*chdir=*/3, /*size=*/0x452, /*img=*/0x400000000ec0); break; case 2: memcpy((void*)0x400000000380, "/dev/loop", 9); *(uint8_t*)0x400000000389 = 0x30; *(uint8_t*)0x40000000038a = 0; memcpy((void*)0x400000000140, "./bus\000", 6); syscall(__NR_mount, /*src=*/0x400000000380ul, /*dst=*/0x400000000140ul, /*type=*/0ul, /*flags=MS_BIND*/ 0x1000ul, /*data=*/0ul); break; case 3: memcpy((void*)0x400000000040, "./bus\000", 6); res = syscall( __NR_open, /*file=*/0x400000000040ul, /*flags=O_TRUNC|O_NOCTTY|O_NOATIME|O_DIRECT|O_CREAT|0x2002*/ 0x46342ul, /*mode=*/0ul); if (res != -1) r[0] = res; break; case 4: syscall( __NR_mmap, /*addr=*/0x400000000000ul, /*len=*/0x600000ul, /*prot=PROT_GROWSUP|PROT_WRITE|0x8088e3ad102bc190*/ 0x8088e3ad122bc192ul, /*flags=MAP_UNINITIALIZED|MAP_LOCKED|MAP_FIXED|MAP_SHARED*/ 0x4002011ul, /*fd=*/r[0], /*offset=*/0ul); break; case 5: *(uint32_t*)0x400000000680 = 0x10; *(uint32_t*)0x400000000684 = 4; *(uint64_t*)0x400000000688 = 0x400000000380; memcpy((void*)0x400000000380, "\x18\x02\x00\x00\x00\xc4\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x85\x00\x00\x00\x3e\x00\x00\x00\x95", 25); *(uint64_t*)0x400000000690 = 0x4000000000c0; memcpy((void*)0x4000000000c0, "GPL\000", 4); *(uint32_t*)0x400000000698 = 1; *(uint32_t*)0x40000000069c = 0xa6; *(uint64_t*)0x4000000006a0 = 0x4000000003c0; *(uint32_t*)0x4000000006a8 = 0; *(uint32_t*)0x4000000006ac = 0; memset((void*)0x4000000006b0, 0, 16); *(uint32_t*)0x4000000006c0 = 0; *(uint32_t*)0x4000000006c4 = 0; *(uint32_t*)0x4000000006c8 = -1; *(uint32_t*)0x4000000006cc = 8; *(uint64_t*)0x4000000006d0 = 0; *(uint32_t*)0x4000000006d8 = 0; *(uint32_t*)0x4000000006dc = 0x10; *(uint64_t*)0x4000000006e0 = 0; *(uint32_t*)0x4000000006e8 = 0; *(uint32_t*)0x4000000006ec = 0; *(uint32_t*)0x4000000006f0 = 0; *(uint32_t*)0x4000000006f4 = 0; *(uint64_t*)0x4000000006f8 = 0; *(uint64_t*)0x400000000700 = 0; *(uint32_t*)0x400000000708 = 0x10; *(uint32_t*)0x40000000070c = 0; *(uint32_t*)0x400000000710 = 0; syscall(__NR_bpf, /*cmd=*/5ul, /*arg=*/0x400000000680ul, /*size=*/0x80ul); break; } } int main(void) { syscall(__NR_mmap, /*addr=*/0x3ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x400000000000ul, /*len=*/0x1000000ul, /*prot=PROT_WRITE|PROT_READ|PROT_EXEC*/ 7ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x400001000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); const char* reason; (void)reason; loop(); return 0; }