// https://syzkaller.appspot.com/bug?id=7f7ef738ef874395fd4ed352ab45d26cb6bcd0cf // 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 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"); } 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 (;;) { if (waitpid(-1, &status, WNOHANG | WAIT_FLAGS) == pid) break; sleep_ms(1); if (current_time_ms() - start < 5000) continue; kill_and_wait(pid, &status); break; } } } void execute_one(void) { memcpy((void*)0x20000240, "exfat\000", 6); memcpy((void*)0x20000080, "./file2\000", 8); memcpy( (void*)0x200027c0, "\x78\x9c\xec\xdc\x09\xb8\x8f\xd5\xf6\x38\xf0\xb5\xf6\xde\x2f\x87\x0c\xdf" "\x24\xf3\xbb\xf6\x7a\xf9\x26\xc3\x26\x49\x32\x24\xc9\x90\x24\x49\x48\xe6" "\x84\x24\x49\x92\x24\x71\xc8\x94\x84\x24\x64\x3c\x49\xc6\x13\x92\x29\x9d" "\x74\xcc\xf3\x90\x39\xe9\xe4\x4a\x92\x24\x24\x24\xec\xff\x73\x1a\xfe\x7e" "\xb7\x7b\xef\xdf\xbd\xf7\xdf\xef\xe7\x3e\xbf\xb3\x3e\xcf\xb3\x1f\x7b\x79" "\xdf\xb5\xbe\x7b\x9f\xf5\x9c\xf3\x0e\xcf\x73\xce\xb7\xdd\x47\xd4\x6c\x52" "\xab\x5a\x43\x66\x86\x7f\x87\xfe\x7d\x82\xbf\xfe\x93\x08\x00\x09\x00\x30" "\x18\x00\x72\x02\x40\x00\x00\xe5\x72\x95\xcb\x95\x7e\x3c\x8b\xc6\xc4\x7f" "\xeb\x43\xc4\x7f\x93\x46\xb3\xae\xf6\x0a\xc4\xd5\x24\xfd\xcf\xd8\xa4\xff" "\x19\x9b\xf4\x3f\x63\x93\xfe\x67\x6c\xd2\xff\x8c\x4d\xfa\x9f\xb1\x49\xff" 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"\xd8\x7b\xb1\xf9\xb1\xf7\x63\x0b\x62\x0b\x63\x8b\x62\x8b\x63\x4b\x62\x1f" "\xc4\x96\xc6\x3e\x8c\xa5\xc4\x3e\x8a\x2d\x8b\x7d\x1c\x4b\x8d\x2d\x8f\xad" "\x88\xad\x8c\xad\x8a\xad\x8e\x79\x5f\x70\x7b\xe4\x0b\xfb\x22\x3e\xee\x6f" "\xf0\x45\xfd\x8d\xbe\x98\x2f\xee\x4b\xf8\x92\xde\xf9\x52\xbe\xb4\xbf\xc9" "\x97\xf1\x37\xfb\xb2\xfe\x16\x5f\xce\xdf\xea\xcb\xfb\xdb\x7c\x05\x5f\xd1" "\x57\xf2\xcd\x7c\x73\xdf\xc2\xb7\xf4\xad\x7c\x6b\xff\x88\x6f\xe3\x1f\xf5" "\x6d\x7d\x3b\xdf\xde\x3f\xe6\x3b\xf8\xc7\x7d\x47\xff\x84\xef\xe4\x9f\xf4" "\x9d\xfd\x53\xbe\x8b\x7f\xda\x77\xf5\xcf\xf8\x6e\xfe\x59\xdf\xdd\x3f\xe7" "\x7b\xf8\xe7\x7d\x4f\xff\x82\xef\xe5\x5f\xf4\xbd\x7d\x1f\x9f\xe8\xfb\xfa" "\x7e\xfe\x25\xdf\xdf\x0f\xf0\x03\xfd\x20\x3f\xd8\xbf\xec\x87\xf8\x57\xfc" "\x50\xff\xaa\x1f\xe6\x87\xfb\x11\xfe\x35\x3f\xd2\xbf\xee\x47\xf9\x37\xfc" "\x68\x3f\xc6\x8f\xf5\x6f\xfa\x71\x7e\xbc\x9f\xe0\x27\xfa\x49\x7e\xb2\x4f" "\xf2\x6f\xf9\x29\xfe\x6d\x3f\xd5\xbf\xe3\xa7\xf9\xe9\x7e\x86\x9f\xe9\x67" "\xf9\xd9\x3e\xd9\xbf\xeb\xe7\xf8\xb9\x7e\x9e\x7f\xcf\xcf\xf7\xef\xfb\x05" "\x7e\xa1\x5f\xe4\x17\xfb\x25\xfe\x03\xbf\xd4\x7f\xe8\x53\xfc\x47\x7e\x99" "\xff\xd8\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\x4f\xfc\x76\xbf" "\xc3\xef\xf4\xbb\xfc\x6e\xbf\xc7\xef\xf5\x9f\xfa\x7d\xfe\x33\xbf\xdf\x7f" "\xee\xd3\xfc\x17\xfe\x80\xff\x8b\x3f\xe8\xbf\xf4\x87\xfc\x57\xfe\xb0\xff" "\xda\x1f\xf1\xdf\xf8\xa3\xfe\x5b\x7f\xcc\x7f\xe7\x8f\xfb\xef\xfd\x09\x7f" "\xd2\x9f\xf2\x3f\xf8\xd3\xfe\x47\x7f\xc6\x9f\xf5\xe7\xfc\x4f\xfe\xbc\xff" "\xd9\x5f\xf0\x17\xfd\x25\xf9\x9d\x35\x21\x84\x10\x42\x88\x7f\x8a\xbe\xc2" "\xf1\xbe\x7f\xe7\xff\xd4\x6f\x23\x5d\x3f\x00\xc8\xbe\x23\xff\xe1\x3f\xd6" "\xdc\x94\xe7\xd7\xf9\x00\xb5\xaf\x73\x0c\x00\x9e\xec\xd3\xbd\xd1\xef\xa3" "\x51\xa3\xc4\xc4\xc4\xdf\xce\x4d\xd5\x10\x14\x59\x08\x00\xb1\xcb\xf9\x99" "\xe0\x72\xbc\x1c\xda\xc3\xe3\xd0\x09\xda\x41\x99\xbf\xbb\xbe\x01\xaa\x12" "\xf2\x15\xea\xc7\x6f\x05\xc8\x0a\x90\xe5\xf7\x9c\x04\xf8\x25\xfe\x43\xfd" "\x9b\xff\x41\xfd\x66\x1f\x5c\xb1\xfe\x42\x80\x62\x45\x2e\xe7\xa4\x7f\xd0" "\xef\xf1\xe5\xfa\x65\xff\x41\xfd\x3d\x1d\xae\x50\x3f\xcb\x97\x49\x00\x6d" "\xff\x4b\x4e\x36\xb8\x1c\x5f\xae\x5f\x1a\x1e\x85\xa7\xa0\xd3\x5f\x9d\x29" "\x84\x10\x42\x08\x21\x84\x10\x42\xfc\x6a\x80\x3a\xdf\xe3\x4a\xcf\xb7\xe9" "\xcf\xe7\x05\xcc\xe5\x9c\xcc\x70\x39\xbe\xd2\xf3\xf9\x15\x54\xfd\x33\xf6" "\x20\x84\x10\x42\x08\x21\x84\x10\x42\x88\xff\xb7\x67\x9e\xef\xf9\xc4\x23" "\x9d\x3a\xb5\xeb\xfa\xbf\x79\x92\xf9\x3f\x63\x19\xff\x01\x13\x04\x80\xff" "\x80\x65\xc8\xe4\x3f\x7f\x72\xb5\x7f\x32\x09\x21\x84\x10\x42\x08\x21\xfe" "\x6c\x97\x6f\xfa\xaf\xf6\x4a\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\x88\x8c\xeb\xdf\xff\x0b\x61\xea\x9f" "\x3e\xf9\x6a\xef\x51\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\x84\xb8" "\xda\xfe\x4f\x00\x00\x00\xff\xff\xce\xea\x5a\x34", 5376); syz_mount_image(/*fs=*/0x20000240, /*dir=*/0x20000080, /*flags=*/0, /*opts=*/0x20000040, /*chdir=*/1, /*size=*/0x1500, /*img=*/0x200027c0); memcpy((void*)0x20000100, "./file2\000", 8); syscall(__NR_truncate, /*file=*/0x20000100ul, /*len=*/0x6ffeul); memcpy((void*)0x20000040, "./file2\000", 8); syscall(__NR_creat, /*file=*/0x20000040ul, /*mode=*/0ul); } 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); loop(); return 0; }