// https://syzkaller.appspot.com/bug?id=6a950e60e5fc7fca63bfb559f93ab8a9ae602ac7 // 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 #ifndef __NR_pidfd_open #define __NR_pidfd_open 434 #endif #ifndef __NR_pidfd_send_signal #define __NR_pidfd_send_signal 424 #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 long syz_pidfd_open(volatile long pid, volatile long flags) { if (pid == 1) { pid = 0; } return syscall(__NR_pidfd_open, pid, flags); } 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[2] = {0xffffffffffffffff, 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 30 00} (length 0x8) // } // flags: mount_flags = 0x800700 (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 { // norecovery: buffer: {6e 6f 72 65 63 6f 76 65 72 79} (length // 0xa) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // nodiscard: buffer: {6e 6f 64 69 73 63 61 72 64} (length 0x9) // } // 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 { // errors_remount: buffer: {65 72 72 6f 72 73 3d 72 65 6d 6f 75 // 6e 74 2d 72 6f} (length 0x11) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // resgid: fs_opt["resgid", fmt[hex, gid]] { // name: buffer: {72 65 73 67 69 64} (length 0x6) // eq: const = 0x3d (1 bytes) // val: gid (resource) // } // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // acl: buffer: {61 63 6c} (length 0x3) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // init_itable_val: fs_opt["init_itable", fmt[hex, int32]] { // name: buffer: {69 6e 69 74 5f 69 74 61 62 6c 65} (length // 0xb) 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 = 0x478 (8 bytes) // img: ptr[in, buffer] { // buffer: (compressed buffer with length 0x478) // } // ] // returns fd_dir memcpy((void*)0x200000000180, "ext4\000", 5); memcpy((void*)0x2000000001c0, "./file0\000", 8); memcpy((void*)0x200000000000, "norecovery", 10); *(uint8_t*)0x20000000000a = 0x2c; memcpy((void*)0x20000000000b, "nodiscard", 9); *(uint8_t*)0x200000000014 = 0x2c; memcpy((void*)0x200000000015, "debug_want_extra_isize", 22); *(uint8_t*)0x20000000002b = 0x3d; sprintf((char*)0x20000000002c, "0x%016llx", (long long)0x5a); *(uint8_t*)0x20000000003e = 0x2c; memcpy((void*)0x20000000003f, "errors=remount-ro", 17); *(uint8_t*)0x200000000050 = 0x2c; memcpy((void*)0x200000000051, "resgid", 6); *(uint8_t*)0x200000000057 = 0x3d; sprintf((char*)0x200000000058, "0x%016llx", (long long)0); *(uint8_t*)0x20000000006a = 0x2c; memcpy((void*)0x20000000006b, "acl", 3); *(uint8_t*)0x20000000006e = 0x2c; memcpy((void*)0x20000000006f, "init_itable", 11); *(uint8_t*)0x20000000007a = 0x3d; sprintf((char*)0x20000000007b, "0x%016llx", (long long)3); *(uint8_t*)0x20000000008d = 0x2c; *(uint8_t*)0x20000000008e = 0; memcpy( (void*)0x2000000002c0, "\x78\x9c\xec\xdc\xcd\x6b\x1c\xe5\x1f\x00\xf0\xef\x4c\x5e\xda\xfe\xfa\x92" "\xfc\x6a\x7d\x69\xad\x1a\x2d\x42\x50\x4c\x9a\xb4\x6a\x0f\x5e\x14\x05\x91" "\x8a\x82\x1e\xea\x31\x26\xdb\x12\xba\x6d\xa4\x89\x62\x6b\xb1\xa9\x88\x27" "\x41\x0a\x7a\x16\x8f\xa2\x7f\x81\x37\x11\x44\x3d\x09\x5e\x3d\x79\x92\x42" "\xd1\x5e\xda\x7a\x8a\xcc\xec\x4c\xbb\xd9\x66\x13\x63\x36\x9d\x98\xfd\x7c" "\x60\x37\xcf\x33\xf3\xcc\xce\xf3\xdd\x67\x5e\x9e\x7d\x9e\xdd\x04\xd0\xb5" "\x86\xb2\xa7\x24\x62\x47\x44\xfc\x1a\x11\x03\x8d\xec\xe2\x02\x43\x8d\x3f" "\xd7\xaf\x9e\x9f\xbc\x71\xf5\xfc\x64\x12\x0b\x0b\xaf\xfd\x91\xe4\xe5\xae" "\x5d\x3d\x3f\x59\x16\x2d\xb7\xdb\x5e\x64\x86\xd3\x88\xf4\xc3\xa4\xd8\xc9" "\x62\xb3\x67\xcf\x9d\x9c\xa8\xd7\x6b\x67\x8a\xfc\xe8\xdc\xa9\xb7\x46\x67" "\xcf\x9e\x7b\xe2\x9d\x53\x13\x27\x6a\x27\x6a\xa7\xc7\x8f\x1c\x39\x7c\x68" "\xec\xe9\xa7\xc6\x9f\xec\x48\x9c\x59\x5c\xd7\xf6\xbd\x3f\xb3\x7f\xef\x8b" "\x6f\x5c\x7a\x79\xf2\xd8\xa5\x37\x7f\xfc\x3a\xab\xef\x8e\x62\x7d\x73\x1c" "\x9d\x32\x94\x05\xfe\xe7\x42\xae\x75\xdd\xa3\x9d\xde\x59\xc5\x76\x36\xa5" "\x93\xde\x0a\x2b\xc2\xaa\xf4\x44\x44\xd6\x5c\x7d\xf9\xf9\x3f\x10\x3d\x71" "\xab\xf1\x06\xe2\x85\x0f\x2a\xad\x1c\xb0\xae\xb2\x7b\xd3\x96\xf6\xab\xe7" "\x17\x80\x4d\x2c\x89\xaa\x6b\x00\x54\xa3\xbc\xd1\x67\x9f\x7f\xcb\xc7\x1d" "\xea\x7a\x6c\x08\x57\x9e\x6d\x7c\x00\xca\xe2\xbe\x5e\x3c\x1a\x6b\x7a\x23" "\x2d\xca\xf4\xb5\x7c\xbe\xed\xa4\xa1\x88\x38\x36\xff\xd7\xe7\xd9\x23\xd6" "\x69\x1c\x02\x00\xa0\xd9\xc7\x93\x9f\x1d\xed\x8f\x88\xf7\x6e\x7c\xf5\x52" "\xd6\xf7\x18\x88\x88\x72\x3c\xe8\x9e\xfc\xf9\xb7\xfc\x79\x57\x31\x87\x32" "\x18\x11\xff\x8f\x88\xdd\x11\x71\x57\x44\xec\x89\x88\xbb\x8b\xb2\xf7\x46" "\xc4\x7d\x6b\xac\xcf\xed\xfd\x9f\xf4\xf2\x1a\x5f\x72\x59\x59\xff\xef\x99" "\x62\x6e\x6b\x71\xff\xaf\xec\xfd\xc5\x60\x4f\x91\xdb\x99\xc7\xdf\x97\x1c" "\x9f\xae\xd7\x0e\x16\xef\xc9\x70\xf4\x6d\xc9\xf2\x63\xcb\xec\xe3\xdb\xe7" "\x7f\xf9\xa4\xdd\xba\xe6\xfe\x5f\xf6\xc8\xf6\x5f\xf6\x05\x8b\x7a\x5c\xee" "\x6d\x19\xa0\x9b\x9a\x98\x9b\xc8\x3b\xa5\x1d\x70\xe5\x62\xc4\xbe\xde\xa5" "\xe2\x4f\x6e\xce\x04\x24\x11\xb1\x37\x22\xf6\xad\xee\xa5\x77\x95\x89\xe9" "\xc7\xbe\xdc\xdf\xae\xd0\xca\xf1\x2f\xa3\x03\xf3\x4c\x0b\x5f\x64\xe1\xcd" "\x67\xf1\xcf\x47\x4b\xfc\xa5\xa4\x79\x7e\x72\xfa\xb6\xf9\xc9\xd1\xad\x51" "\xaf\x1d\x1c\x2d\x8f\x8a\xdb\xfd\xf4\xf3\x47\xaf\xb6\xdb\xff\x9a\xe2\xef" "\x80\x2b\xb5\xc6\xdf\xa6\xf6\x6f\x2d\x32\x98\x34\xcf\xd7\xce\x76\x76\xff" "\xff\xf2\xf8\x4f\xfb\x93\xd7\xf3\x79\xe6\xfe\x62\xd9\xbb\x13\x73\x73\x67" "\xc6\x22\xfa\x93\xa3\x79\x7e\xd1\xf2\xf1\x5b\xdb\x96\xf9\xb2\x7c\x76\xfc" "\x0f\x1f\x58\xfa\xfc\xdf\x5d\x6c\x93\xc5\x7f\x7f\x44\x64\x07\xf1\x03\x11" "\xf1\x60\x44\x3c\x54\xd4\xfd\xe1\x88\x78\x24\x22\x0e\x2c\x13\xe3\x0f\xcf" "\xad\x1c\x7f\xa4\x15\xb5\xff\xc5\x88\xa9\x25\xaf\x7f\x37\x8f\xff\x96\xf6" "\x5f\x7d\xa2\xe7\xe4\xf7\xdf\xb4\xdb\xff\x3f\x6b\xff\xc3\x79\x6a\xb8\x58" "\x92\x5f\xff\x56\xb0\x54\x75\xb2\xcb\x45\x6b\x05\xd7\xf2\xde\x01\x00\x00" "\xc0\x7f\x45\x9a\x7f\x07\x3e\x49\x47\x6e\xa6\xd3\x74\x64\xa4\xf1\x1d\xfe" "\x3d\xf1\xbf\xb4\x3e\x33\x3b\xf7\xf8\xf1\x99\xb7\x4f\x4f\x35\xbe\x2b\x3f" "\x18\x7d\x69\x39\xd2\x35\x50\x8c\x87\xd6\xa7\xeb\xb5\xb1\x64\xbe\x78\xc5" "\xc6\xf8\xe8\x78\x31\x56\x5c\x8e\x97\x1e\x2a\xc6\x8d\x3f\xed\xd9\x96\xe7" "\x47\x26\x67\xea\x53\x15\xc7\x0e\xdd\x6e\x7b\x9b\xf3\x3f\xf3\x7b\x4f\xd5" "\xb5\x03\xd6\xd9\xb6\x25\x97\x8e\xf7\xdf\xf1\x8a\x00\x15\x68\x9d\x47\x4f" "\x17\x67\x2f\xbc\x12\x2e\x06\xb0\x59\xf9\xbd\x36\x74\xaf\x15\xce\xff\xe6" "\xdf\xc1\x00\x9b\x8c\xfb\x3f\x74\xaf\xa5\xce\xff\x0b\x2d\x79\x73\x01\xb0" "\x39\xb9\xff\x43\xf7\x72\xfe\x43\x97\x4a\xbf\xab\xba\x06\x40\x85\xdc\xff" "\xa1\x2b\xad\xe5\x77\xfd\xeb\x98\xd8\xba\x31\xaa\x51\x4d\x62\x83\x34\x4a" "\xf9\x0f\x20\x16\xaf\x8a\x28\x13\x69\xe5\x35\x94\x58\x45\x62\x6b\xac\x6e" "\xab\x8a\x2f\x4c\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x1d\xf2" "\x77\x00\x00\x00\xff\xff\x41\x6e\xe2\x4c", 1144); syz_mount_image(/*fs=*/0x200000000180, /*dir=*/0x2000000001c0, /*flags=MS_I_VERSION|MS_NOATIME|0x300*/ 0x800700, /*opts=*/0x200000000000, /*chdir=*/1, /*size=*/0x478, /*img=*/0x2000000002c0); // close arguments: [ // fd: fd (resource) // ] syscall(__NR_close, /*fd=*/(intptr_t)-1); // syz_pidfd_open arguments: [ // pid: pid (resource) // flags: const = 0x0 (8 bytes) // ] // returns fd_pidfd res = -1; res = syz_pidfd_open(/*pid=*/0, /*flags=*/0); if (res != -1) r[0] = res; // pidfd_send_signal arguments: [ // fd: fd_pidfd (resource) // sig: int32 = 0x2 (4 bytes) // info: nil // flags: const = 0x0 (8 bytes) // ] syscall(__NR_pidfd_send_signal, /*fd=*/r[0], /*sig=*/2, /*info=*/0ul, /*flags=*/0ul); // openat$kvm arguments: [ // fd: const = 0xffffffffffffff9c (8 bytes) // file: ptr[in, buffer] { // buffer: {2f 64 65 76 2f 6b 76 6d 00} (length 0x9) // } // flags: open_flags = 0x981c03 (4 bytes) // mode: const = 0x0 (2 bytes) // ] // returns fd_kvm memcpy((void*)0x200000000080, "/dev/kvm\000", 9); syscall( __NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x200000000080ul, /*flags=O_SYNC|O_NONBLOCK|O_CLOEXEC|O_APPEND|O_RDWR|0x800001*/ 0x981c03, /*mode=*/0); // ioctl$KVM_SET_USER_MEMORY_REGION arguments: [ // fd: fd_kvmvm (resource) // cmd: const = 0x4020ae46 (4 bytes) // arg: nil // ] syscall(__NR_ioctl, /*fd=*/(intptr_t)-1, /*cmd=*/0x4020ae46, /*arg=*/0ul); // mprotect arguments: [ // addr: VMA[0x3000] // len: len = 0x3000 (8 bytes) // prot: mmap_prot = 0x1 (8 bytes) // ] syscall(__NR_mprotect, /*addr=*/0x200000000000ul, /*len=*/0x3000ul, /*prot=PROT_READ*/ 1ul); // epoll_create1 arguments: [ // flags: epoll_flags = 0x80000 (8 bytes) // ] // returns fd_epoll res = syscall(__NR_epoll_create1, /*flags=EPOLL_CLOEXEC*/ 0x80000ul); if (res != -1) r[1] = res; // epoll_ctl$EPOLL_CTL_ADD arguments: [ // epfd: fd_epoll (resource) // op: const = 0x1 (8 bytes) // fd: fd (resource) // ev: nil // ] syscall(__NR_epoll_ctl, /*epfd=*/r[1], /*op=*/1ul, /*fd=*/(intptr_t)-1, /*ev=*/0ul); // epoll_ctl$EPOLL_CTL_MOD arguments: [ // epfd: fd_epoll (resource) // op: const = 0x3 (8 bytes) // fd: fd (resource) // ev: nil // ] syscall(__NR_epoll_ctl, /*epfd=*/r[1], /*op=*/3ul, /*fd=*/(intptr_t)-1, /*ev=*/0ul); } int main(void) { syscall(__NR_mmap, /*addr=*/0x1ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x200000000000ul, /*len=*/0x1000000ul, /*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=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/(intptr_t)-1, /*offset=*/0ul); const char* reason; (void)reason; use_temporary_dir(); loop(); return 0; }