// https://syzkaller.appspot.com/bug?id=dd363e7f1b3b438453a11b28953ffe739a190a4c // 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_connect #define __NR_connect 203 #endif #ifndef __NR_memfd_create #define __NR_memfd_create 279 #endif #ifndef __NR_mmap #define __NR_mmap 222 #endif #ifndef __NR_openat #define __NR_openat 56 #endif #ifndef __NR_prlimit64 #define __NR_prlimit64 261 #endif #ifndef __NR_sched_setscheduler #define __NR_sched_setscheduler 119 #endif #ifndef __NR_sendmmsg #define __NR_sendmmsg 269 #endif #ifndef __NR_unlinkat #define __NR_unlinkat 35 #endif #ifndef __NR_write #define __NR_write 64 #endif static unsigned long long procid; static void sleep_ms(uint64_t ms) { usleep(ms * 1000); } static uint64_t current_time_ms(void) { struct timespec ts; if (clock_gettime(CLOCK_MONOTONIC, &ts)) exit(1); return (uint64_t)ts.tv_sec * 1000 + (uint64_t)ts.tv_nsec / 1000000; } static 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 (;;) { 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_one(void) { intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } memcpy((void*)0x20000180, "hfs\000", 4); memcpy((void*)0x20000100, "\023\023w\305\3745\324\024T\325\324\035)\255\032`)" "Y\201F\346\276\026nA\255\r\275@T\003<\2373\273\332\202$" "\242\363\327r\347cnH\263<\277p\203r\350\361\271\223>" "\305\022wC\276\"\006 \236\360-\371\313\362\366\350\200\3238/\000", 78); memcpy( (void*)0x20000200, "\x71\x75\x69\x65\x74\x2c\x63\x6f\x64\x65\x70\x61\x67\x65\x3d\x69\x73\x6f" "\x38\x38\x35\x39\x2d\x31\x35\x2c\x70\x61\x72\x74\x3d\x30\x78\x30\x30\x30" "\x30\x30\x30\x30\x00\x00\x00\x00\x00\x00\x00\x00\x66\x2c\x00\xa2\x00\x00" "\x00\x07\x00\x00\x00\x00\xed\xe9\xde\xbf\x53\x0c\x3c\xc4\xd0\x4b\x54\x89" "\x19\xac\xa0\xc2\x93\x7d\x4d\xa1\xfc\x31\xdc\x42\xfc\x2e\x3e", 87); *(uint8_t*)0x20000257 = -1; memcpy( (void*)0x20000280, "\x78\x9c\xec\xdd\x4d\x6b\x13\x5b\x1c\xc7\xf1\xdf\x99\xa4\x4d\x7a\x1b\x7a" "\xe7\xb6\xbd\x5c\xb8\xcb\x6a\x41\x37\x52\xeb\x46\xdc\xa4\x48\x5e\x84\xb8" "\x10\xb5\x89\x50\x0c\x15\x6d\x05\xeb\xc6\x2a\xae\x44\x74\xef\xde\xb7\xe0" "\x5b\x10\xdc\x28\xbe\x01\x5d\xb9\xf2\x05\x44\x10\x46\xce\x99\xc9\xe4\xa1" "\xf3\x10\x43\x33\xd3\xe2\xf7\x03\x0d\x93\x99\x73\xe6\xfc\x4f\xe6\xe1\x9c" "\x7f\x20\x1d\x01\xf8\x63\x5d\x6d\x7d\x79\x7b\xe9\x9b\xfd\x33\x52\x45\x15" "\xe9\xc5\x15\xc9\x93\x54\x97\xaa\x92\xfe\xd5\x7f\xf5\x87\xbb\xfb\x3b\xfb" "\xdd\x4e\x3b\x63\x3f\xbd\xc0\xb1\xb5\x8c\xc2\x9a\xe6\x48\xa1\xed\xdd\x4e" "\x52\xdd\xba\xa2\x1a\x11\xdf\xbe\xab\xaa\x31\xbc\x0e\xb3\x11\x04\xc1\xd6" "\x57\x49\x7b\x65\x07\x82\x52\xb9\xab\x3f\x81\x27\xd5\xa2\xab\xd3\x6d\xaf" "\x17\x1e\x59\xb6\xa7\x53\xd6\x3b\x3c\xe6\x38\x4e\x1b\xd3\x53\x4f\x8f\xb4" "\x54\x76\x1c\x00\x80\x72\x45\xe3\xbf\x17\x8d\xf3\x8d\x68\xfe\xee\x79\xd2" "\x7a\x34\xec\x9f\xc8\xf1\x7f\x5a\xbd\xb2\x03\x98\xb9\x20\x73\xeb\xd0\xf8" "\xef\xb2\xac\xc0\xd8\xe3\xfb\xb7\xdb\x34\xc8\xf7\x5c\x0a\x67\xb7\x7b\xfd" "\x2c\x71\x92\x96\xe7\xc6\xde\xcf\x2b\x3c\xb3\x46\x26\x98\x26\x2f\xab\x74" "\xb1\x78\x0b\x77\x76\xba\x9d\x0b\xdb\xf7\xba\x6d\x4f\xcf\xd4\x8c\x0c\x15" "\x5b\x75\xaf\xed\xf0\xd4\xed\xcb\x89\x76\x2d\x21\x37\xcd\x30\x41\xdf\x4d" "\xf2\x8c\x72\xd1\xf5\x61\xce\xf6\x61\x33\x25\xfe\x95\x29\x5b\x9c\x9a\xf9" "\x60\x3e\x99\x1b\xc6\xd7\x1b\xb5\xe3\xf9\x5f\x35\x30\xf6\x30\xb9\x23\xe5" "\x8f\x1d\xa9\x30\xfe\x8d\xf4\x3d\xba\x5e\xfa\xb6\x94\xa2\xdb\x46\xb3\xd9" "\xf4\x46\x8a\xfc\xe3\x1a\xf9\x3f\x6a\x21\x92\xd3\xcb\x7a\x72\x46\xa2\xe8" "\xf6\x64\xf7\x39\xf2\x05\x81\x9f\x17\xa7\x6b\x7b\x79\xac\x56\xd8\xbb\x8b" "\x39\xb5\x56\xc2\x5a\x5b\x0b\x23\xb5\x36\xfb\xef\x52\x6a\xad\x8e\xb4\x65" "\x7b\x13\x9f\xcd\xe9\xed\xcd\x9a\x79\x65\xae\x99\x35\x7d\xd7\x3b\xb5\x86" "\xe6\xff\x9e\x8d\x6f\x5d\x99\x57\xe6\xe0\xaa\x31\xeb\xe1\x50\xe0\x3e\xf1" "\xb0\x3f\xf3\xc9\xcd\x55\xdd\x3e\xfd\x23\x23\xc7\xa1\xae\x37\x46\xd7\xc4" "\x9f\x62\x2d\x2d\xf4\x1f\xd9\xf7\x34\x8c\x79\x92\xb1\xed\xa5\x6e\xeb\xb2" "\x96\xf6\x0e\x1e\xdf\xad\x74\xbb\x9d\x07\x76\xe1\x56\xc2\xc2\xfd\x46\xbc" "\x66\xee\xb9\x94\x58\xa6\x84\x05\x4f\x83\x35\x3a\x1c\x6c\xaa\x29\xfc\x22" "\xf2\x48\xad\xfe\xa0\x54\x64\xa8\xe7\x8f\x75\x87\xf6\xfe\x91\x5b\xd8\x5e" "\x65\x85\x74\xf0\xc4\x9c\x09\x65\x2c\xb4\x3e\x16\x7b\x22\x15\xb7\xd0\x88" "\xfb\x55\xd0\x3d\x0a\xa5\x1a\x1c\xfd\xdc\xa2\xef\x0b\x09\x08\x45\x73\xf3" "\xae\x30\xff\x1b\xca\x57\x36\xdc\x64\xcf\xbe\xf8\x19\xf3\xf4\xdc\x09\x59" "\xb4\xc7\xc0\xce\xb1\xe3\x0c\xa8\x3e\x52\x7f\xd9\x2d\xfd\xf5\x5b\x19\xdc" "\x62\x7a\x06\x37\x69\xce\x75\xe6\x9c\x74\x36\x5e\xf5\x33\x70\xad\x55\x53" "\x5b\xf4\xa3\x38\x4f\x87\x20\x6b\xea\x67\x99\x96\x3e\xeb\x26\xdf\xff\x03" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x9c\x36\x7b\x07" "\x35\x49\xb3\xfd\x5d\x41\x72\xcb\xa9\x3f\xee\x03\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x63\xe2\xe7\xff\xaa\xff\xfc" "\x5f\x4d\xf6\xfc\xdf\xf1\xff\xfc\x5d\x09\x9f\xf0\x72\x2c\xcf\xff\x7d\xbd" "\x2b\x9e\xff\x0b\xcc\xde\xaf\x00\x00\x00\xff\xff\x7f\x5a\x86\x5f", 736); syz_mount_image(/*fs=*/0x20000180, /*dir=*/0x20000100, /*flags=MS_LAZYTIME|MS_STRICTATIME|MS_DIRSYNC*/ 0x3000080, /*opts=*/0x20000200, /*chdir=*/0x11, /*size=*/0x2e0, /*img=*/0x20000280); syscall(__NR_prlimit64, /*pid=*/0, /*res=RLIMIT_RTPRIO*/ 0xeul, /*new=*/0ul, /*old=*/0ul); *(uint32_t*)0x20000080 = 7; syscall(__NR_sched_setscheduler, /*pid=*/0, /*policy=SCHED_FIFO*/ 1ul, /*prio=*/0x20000080ul); memcpy((void*)0x20000140, "blkio.bfq.io_service_bytes\000", 27); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x20000140ul, /*flags=*/0x275a, /*mode=*/0); if (res != -1) r[0] = res; sprintf((char*)0x20000000, "0x%016llx", (long long)0); syscall(__NR_write, /*fd=*/r[0], /*buf=*/0x20000000ul, /*len=*/0xffffff6aul); memcpy((void*)0x20000380, "./file1\000", 8); syscall(__NR_unlinkat, /*fd=*/0xffffff9c, /*path=*/0x20000380ul, /*flags=*/0ul); *(uint16_t*)0x2057eff8 = 0; memcpy((void*)0x2057effa, "./" "file0\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000" "\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000\000", 108); syscall(__NR_connect, /*fd=*/-1, /*addr=*/0x2057eff8ul, /*addrlen=*/0x6eul); syscall(__NR_sendmmsg, /*fd=*/-1, /*mmsg=*/0ul, /*vlen=*/0ul, /*f=*/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); const char* reason; (void)reason; loop(); return 0; }