// https://syzkaller.appspot.com/bug?id=3336e8ababe59f393092f260ce584bb27dc94c7c // 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 __thread int clone_ongoing; static __thread int skip_segv; static __thread jmp_buf segv_env; static void segv_handler(int sig, siginfo_t* info, void* ctx) { if (__atomic_load_n(&clone_ongoing, __ATOMIC_RELAXED) != 0) { exit(sig); } uintptr_t addr = (uintptr_t)info->si_addr; const uintptr_t prog_start = 1 << 20; const uintptr_t prog_end = 100 << 20; int skip = __atomic_load_n(&skip_segv, __ATOMIC_RELAXED) != 0; int valid = addr < prog_start || addr > prog_end; if (skip && valid) { _longjmp(segv_env, 1); } exit(sig); } static void install_segv_handler(void) { struct sigaction sa; memset(&sa, 0, sizeof(sa)); sa.sa_handler = SIG_IGN; syscall(SYS_rt_sigaction, 0x20, &sa, NULL, 8); syscall(SYS_rt_sigaction, 0x21, &sa, NULL, 8); memset(&sa, 0, sizeof(sa)); sa.sa_sigaction = segv_handler; sa.sa_flags = SA_NODEFER | SA_SIGINFO; sigaction(SIGSEGV, &sa, NULL); sigaction(SIGBUS, &sa, NULL); } #define NONFAILING(...) \ ({ \ int ok = 1; \ __atomic_fetch_add(&skip_segv, 1, __ATOMIC_SEQ_CST); \ if (_setjmp(segv_env) == 0) { \ __VA_ARGS__; \ } else \ ok = 0; \ __atomic_fetch_sub(&skip_segv, 1, __ATOMIC_SEQ_CST); \ ok; \ }) 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 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 setup_sysctl() { int cad_pid = fork(); if (cad_pid < 0) exit(1); if (cad_pid == 0) { for (;;) sleep(100); } char tmppid[32]; snprintf(tmppid, sizeof(tmppid), "%d", cad_pid); struct { const char* name; const char* data; } files[] = { {"/sys/kernel/debug/x86/nmi_longest_ns", "10000000000"}, {"/proc/sys/kernel/hung_task_check_interval_secs", "20"}, {"/proc/sys/net/core/bpf_jit_kallsyms", "1"}, {"/proc/sys/net/core/bpf_jit_harden", "0"}, {"/proc/sys/kernel/kptr_restrict", "0"}, {"/proc/sys/kernel/softlockup_all_cpu_backtrace", "1"}, {"/proc/sys/fs/mount-max", "100"}, {"/proc/sys/vm/oom_dump_tasks", "0"}, {"/proc/sys/debug/exception-trace", "0"}, {"/proc/sys/kernel/printk", "7 4 1 3"}, {"/proc/sys/kernel/keys/gc_delay", "1"}, {"/proc/sys/vm/oom_kill_allocating_task", "1"}, {"/proc/sys/kernel/ctrl-alt-del", "0"}, {"/proc/sys/kernel/cad_pid", tmppid}, }; for (size_t i = 0; i < sizeof(files) / sizeof(files[0]); i++) { if (!write_file(files[i].name, files[i].data)) { } } kill(cad_pid, SIGKILL); while (waitpid(cad_pid, NULL, 0) != cad_pid) ; } 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 loop(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); event_timedwait(&th->done, 50 + (call == 0 ? 4000 : 0)); break; } } for (i = 0; i < 100 && __atomic_load_n(&running, __ATOMIC_RELAXED); i++) sleep_ms(1); } uint64_t r[1] = {0xffffffffffffffff}; void execute_call(int call) { intptr_t res = 0; switch (call) { case 0: NONFAILING(memcpy((void*)0x20000280, "exfat\000", 6)); 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"\x12\xdd\x55\x2e\xab\xcb\xe6\xb2\xbb\x1c\x2e\xe6\xae\x76\x39\xdd\x35" "\x2e\x97\xbb\xd6\xe5\x76\x79\x5c\x5e\x97\xcf\xe5\x77\x05\x5c\x41\x17" "\x3a\x72\xd6\xb1\x8b\x5c\x21\x57\xd8\xc5\xdd\x75\xae\x88\xbb\xde\x15" "\x75\xc5\x5c\x71\x57\xc2\x39\x57\xd2\x95\x72\x2d\x5c\x4b\xd7\xd2\xb5" "\x72\x8f\xb8\xd6\xae\x8d\x6b\xeb\x1e\x75\x8f\xba\xc7\xdc\x63\xee\xf1" "\x84\x5f\x0b\x77\x9d\xdc\x53\xae\xb3\x7b\xda\x75\x71\xcf\xb8\x67\xdc" "\xb3\xae\x9b\x7b\xce\x75\x77\xcf\xbb\x1e\xee\x05\xd7\xd3\xf5\x72\x49" "\x2e\xc9\xf5\x71\x7d\x5c\x5f\xd7\xd7\xf5\x77\xfd\xdd\x40\x37\xd0\x0d" "\x72\x83\xdc\x60\x37\xd8\x0d\x71\x43\xdc\x30\x37\xcc\x0d\x77\xc3\xdd" "\x08\x37\xc2\x8d\x74\x23\xdd\x68\x37\xda\x8d\x71\x63\xdc\x38\x37\xce" "\x4d\x70\x13\x5c\xb2\x4b\x76\x93\xdc\x24\x37\xd9\x4d\x76\x53\xdc\x14" "\x37\xcd\x4d\x73\x33\xdc\x0c\x37\xcb\xcd\x72\xb3\xdd\x6c\x37\xd7\xcd" "\x75\xf3\xdc\x3c\xb7\xc0\x2d\x70\x8b\xdc\x22\xb7\xc4\x2d\x71\x4b\xdd" "\x52\x97\xe2\x52\xdc\x32\xb7\xcc\xa5\xba\x54\xb7\xc2\xad\x70\xab\xdc" "\x2a\xb7\xc6\xad\x71\xeb\xdc\x3a\xb7\xc1\x6d\x70\x9b\xdc\x26\xb7\xc5" "\x6d\x71\xdb\xdc\x36\xb7\xdd\x6d\x77\x3b\xdd\x4e\xb7\xdb\xed\x76\x7b" "\xdd\x5e\xb7\xcf\xed\x73\xfb\xdd\x7e\x97\xe6\xd2\xdc\x01\x77\xc0\x1d" "\x74\x07\xdd\x21\xf7\x85\x3b\xec\xbe\x74\x47\xdc\x57\xee\xa8\xfb\xda" "\x1d\x73\xdf\xb8\xe3\xee\x5b\x77\xc2\x9d\x74\xa7\x9c\xd7\xa7\xdd\xf7" "\xee\x8c\x3b\xeb\xce\xb9\x1f\xdc\x79\xf7\xa3\xbb\xe0\x7e\x72\x17\x9d" "\x77\xc9\xb1\x37\x63\x93\x62\x6f\xc5\x26\xc7\xde\x8e\x4d\x89\x4d\x8d" "\x4d\x8b\x4d\x8f\xcd\x88\xcd\x8c\xcd\x8a\xbd\x13\x9b\x1d\x9b\x13\x9b" "\x1b\x7b\x37\x36\x2f\x36\x3f\xb6\x20\xb6\x30\xb6\x28\xb6\x38\xb6\x24" "\xf6\x5e\x6c\x69\xec\xfd\x58\x4a\xec\x83\xd8\xb2\xd8\x87\xb1\xd4\xd8" "\xf2\xd8\x8a\xd8\xca\xd8\xaa\xd8\xea\x98\xf7\x05\xb6\x47\xbe\x90\x2f" "\xec\xe3\xfe\x3a\x5f\xc4\x5f\xef\x8b\xfa\x62\xbe\xb8\x2f\xe1\x9d\x2f" "\xe9\x4b\xf9\x1b\x7c\x69\x7f\xa3\x2f\xe3\x6f\xf2\x65\xfd\xcd\xbe\x9c" "\xbf\xc5\x97\xf7\x15\x7c\x45\xdf\xc4\x37\xf5\xcd\x7c\x73\xdf\xc2\xb7" "\xf4\x0f\xfb\x56\xfe\x11\xdf\xda\xb7\xf1\x6d\xfd\xa3\xbe\x9d\x7f\xcc" "\xb7\xf7\x8f\xfb\x0e\xfe\x09\xdf\xd1\x3f\xe9\x3b\xf9\xa7\x7c\x67\xff" "\xb4\xef\xe2\x9f\xf1\x5d\xfd\xb3\xf3\x7f\xed\xb2\xef\xe1\x5f\xf0\x3d" "\x7d\x2f\x9f\xe4\x7b\xfb\x3e\xfe\x45\xdf\xd7\xf7\xf3\xfd\xfd\x00\x3f" "\xd0\xbf\xe4\x07\xf9\x97\xfd\x60\xff\x8a\x1f\xe2\x87\xfa\x61\xfe\x55" "\x3f\xdc\xbf\xe6\x47\xf8\xd7\xfd\x48\x3f\xca\x8f\xf6\x6f\xf8\x31\x7e" "\xac\x1f\xe7\xc7\xfb\x09\x7e\xa2\x4f\xf6\x6f\xfa\x49\xfe\x2d\x3f\xd9" "\xbf\xed\xa7\xf8\xa9\x7e\x9a\x9f\xee\x67\xf8\x99\x7e\x96\x7f\xc7\xcf" "\xf6\x73\xfc\x5c\xff\xae\x9f\xe7\xe7\xfb\x05\x7e\xa1\x5f\xe4\x17\xfb" "\x25\xfe\x3d\xbf\xd4\xbf\xef\x53\xfc\x07\x7e\x99\xff\xd0\xa7\xfa\xe5" "\x7e\x85\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\x8f\xfc\x76\xbf\xc3\xef\xf4" "\xbb\xfc\x6e\xbf\xc7\xef\xf5\x1f\xfb\x7d\xfe\x13\xbf\xdf\x7f\xea\xd3" "\xfc\x67\xfe\x80\xff\x8b\x3f\xe8\x3f\xf7\x87\xfc\x17\xfe\xb0\xff\xd2" "\x1f\xf1\x5f\xf9\xa3\xfe\x6b\x7f\xcc\x7f\xe3\x8f\xfb\x6f\xfd\x09\x7f" "\xd2\x9f\xf2\xdf\xf9\xd3\xfe\x7b\x7f\xc6\x9f\xf5\xe7\xfc\x0f\xfe\xbc" "\xff\xd1\x5f\xf0\x3f\xf9\x8b\xf2\x37\x6b\x42\x08\x21\x84\x10\xff\x14" "\x7d\x99\xfd\xbd\xff\xce\xff\xa9\x5f\xb7\x74\x7d\x00\x20\xdb\x8e\x7c" "\x87\xff\x7a\xce\x4d\xb9\x7f\x19\xf7\x53\xfb\x3a\xc6\x00\xe0\x89\x5e" "\x5d\x1b\xfc\xb6\x35\x68\x90\x94\x94\xf4\xeb\xb1\xa9\x1a\x82\xc2\x0b" "\x01\x20\x76\x29\xff\xe7\xef\x1f\xf8\x35\x5e\x0e\x6d\xe1\x31\xe8\x00" "\x6d\xa0\xf4\xdf\xad\xaf\x9f\xaa\xf8\xf3\x7d\xdf\x7f\x37\x7f\xfc\x66" "\x80\x44\x80\x2c\xbf\xe5\xa4\x3f\x1e\x25\xc2\x5f\xcf\x7f\xe3\x3f\x98" "\xbf\xc9\x7b\x7c\xb9\xf9\x17\x02\x14\x2d\x7c\x29\x27\xfd\x44\xbf\xc5" "\x97\xe6\x2f\xf3\x0f\xe6\xdf\xd3\xee\x32\xf3\x67\xf9\x3c\x19\xa0\xf5" "\x7f\xc9\xc9\x0a\x97\xe2\x4b\xf3\x97\x82\x47\xe0\x49\xe8\xf0\xbb\x23" "\x85\x10\x42\x08\x21\x84\x10\x42\x88\x5f\xf4\x53\xe7\xbb\x5d\xee\xf9" "\x36\xfd\xf9\x3c\xbf\xb9\x94\x93\x19\x2e\xc5\x97\x7b\x3e\xbf\x8c\xca" "\x7f\xc4\x1a\x84\x10\x42\x08\x21\x84\x10\x42\x08\xf1\xdf\x7b\xfa\xb9" "\xee\x8f\x3f\xdc\xa1\x43\x9b\xce\xff\xc9\x83\xcc\x7f\x8e\x32\xfe\x04" "\x03\x04\x80\x3f\x41\x19\x32\xf8\xf3\x0f\xae\xf4\x6f\x26\x21\x84\x10" "\x42\x08\x21\xc4\x1f\xed\xd2\x4d\xff\x95\xae\x44\x08\x21\x84\x10\x42" "\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21" "\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\xc8" "\xb8\xfe\xfd\x6f\x08\x53\xff\xf4\xc1\x57\x7a\x8d\x42\x08\x21\x84\x10" "\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08" "\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84\x10\x42\x08\x21\x84" "\x10\x42\x08\x21\x84\x10\x42\x08\x21\xc4\x95\xf6\x7f\x02\x00\x00\xff" "\xff\xe6\x0d\x55\xd3", 5377)); NONFAILING(syz_mount_image(/*fs=*/0x20000280, /*dir=*/0x200000c0, /*flags=MS_SYNCHRONOUS|MS_NODIRATIME*/ 0x810, /*opts=*/0x200018c0, /*chdir=*/0xfd, /*size=*/0x1501, /*img=*/0x200002c0)); break; case 1: NONFAILING(memcpy((void*)0x20000000, "./bus\000", 6)); syscall(__NR_open, /*file=*/0x20000000ul, /*flags=O_NOFOLLOW|O_NOCTTY|O_NOATIME|O_CREAT|O_RDWR*/ 0x60142ul, /*mode=*/0ul); break; case 2: NONFAILING(memcpy((void*)0x20000380, "/dev/loop", 9)); NONFAILING(*(uint8_t*)0x20000389 = 0x30); NONFAILING(*(uint8_t*)0x2000038a = 0); NONFAILING(memcpy((void*)0x20000140, "./bus\000", 6)); syscall(__NR_mount, /*src=*/0x20000380ul, /*dst=*/0x20000140ul, /*type=*/0ul, /*flags=MS_BIND*/ 0x1000ul, /*data=*/0ul); break; case 3: NONFAILING(memcpy((void*)0x20000500, "./bus\000", 6)); res = syscall(__NR_open, /*file=*/0x20000500ul, /*flags=*/0ul, /*mode=*/0ul); if (res != -1) r[0] = res; break; case 4: NONFAILING(*(uint64_t*)0x200007c0 = 0); NONFAILING(*(uint64_t*)0x200007c8 = 0); NONFAILING(*(uint64_t*)0x200007d0 = 0); NONFAILING(*(uint64_t*)0x200007d8 = 1); NONFAILING(*(uint64_t*)0x200007e0 = 0x8001); NONFAILING(*(uint32_t*)0x200007e8 = 0); NONFAILING(*(uint32_t*)0x200007ec = 0); NONFAILING(*(uint32_t*)0x200007f0 = 0); NONFAILING(*(uint32_t*)0x200007f4 = 0xa); NONFAILING(memcpy( (void*)0x200007f8, "\xef\x35\x9f\x41\x3b\xb9\x38\x52\xf7\xd6\xa4\xae\x6d\xdd\xfb\xd1\xce" "\x5d\x29\xc2\xee\x5e\x5c\x9d\x00\x0f\xf8\xee\x09\xe7\x37\xff\x0e\xdf" "\x11\x0f\xf4\x11\x76\x39\xc2\xeb\x4b\x78\xc6\x6e\xe6\x77\xdf\x70\x19" "\x05\xb9\xaa\xfa\xb4\xaf\xaa\xf7\x55\xa3\xf6\xa0\x04", 64)); NONFAILING(memcpy( (void*)0x20000838, "\xcb\xa3\xd6\x25\x78\x08\x20\xd1\xcb\xf7\xdb\x71\x03\x82\x59\xca\x17" "\x1c\xe1\xa3\x11\xef\x97\xe4\x29\x8d\x1e\x14\xef\x01\x06\x00\x00\xe9" "\x00\x96\x00\xfd\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x04\x00\x00\x00\x00\x00\x00\x00", 64)); NONFAILING(memcpy( (void*)0x20000878, "\x93\x00\xe6\xd6\xa8\x9e\xf3\x0b\xea\x2a\x00\x92\x00\x00\x10\x00\x00" "\x00\xaf\xf5\x71\xec\x31\x99\xbd\xe4\x00\x00\x00\x00\x00\x00", 32)); NONFAILING(*(uint64_t*)0x20000898 = 0); NONFAILING(*(uint64_t*)0x200008a0 = 0); syscall(__NR_ioctl, /*fd=*/r[0], /*cmd=*/0x4c04, /*arg=*/0x200007c0ul); break; case 5: NONFAILING(memcpy( (void*)0x20000e00, "./" "file0aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa" "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\000", 252)); syscall(__NR_creat, /*file=*/0x20000e00ul, /*mode=*/0ul); break; } } int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x20000000ul, /*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=*/0x21000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); setup_sysctl(); const char* reason; (void)reason; install_segv_handler(); use_temporary_dir(); loop(); return 0; }