// https://syzkaller.appspot.com/bug?id=7f0a5bdbdd9e24a6780456f16719826d6c92b45d // autogenerated by syzkaller (https://github.com/google/syzkaller) #define _GNU_SOURCE #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifndef __NR_memfd_create #define __NR_memfd_create 319 #endif static unsigned long long procid; 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; } static void setup_gadgetfs(); static void setup_binderfs(); static void setup_fusectl(); static void sandbox_common_mount_tmpfs(void) { write_file("/proc/sys/fs/mount-max", "100000"); if (mkdir("./syz-tmp", 0777)) exit(1); if (mount("", "./syz-tmp", "tmpfs", 0, NULL)) exit(1); if (mkdir("./syz-tmp/newroot", 0777)) exit(1); if (mkdir("./syz-tmp/newroot/dev", 0700)) exit(1); unsigned bind_mount_flags = MS_BIND | MS_REC | MS_PRIVATE; if (mount("/dev", "./syz-tmp/newroot/dev", NULL, bind_mount_flags, NULL)) exit(1); if (mkdir("./syz-tmp/newroot/proc", 0700)) exit(1); if (mount("syz-proc", "./syz-tmp/newroot/proc", "proc", 0, NULL)) exit(1); if (mkdir("./syz-tmp/newroot/selinux", 0700)) exit(1); const char* selinux_path = "./syz-tmp/newroot/selinux"; if (mount("/selinux", selinux_path, NULL, bind_mount_flags, NULL)) { if (errno != ENOENT) exit(1); if (mount("/sys/fs/selinux", selinux_path, NULL, bind_mount_flags, NULL) && errno != ENOENT) exit(1); } if (mkdir("./syz-tmp/newroot/sys", 0700)) exit(1); if (mount("/sys", "./syz-tmp/newroot/sys", 0, bind_mount_flags, NULL)) exit(1); if (mount("/sys/kernel/debug", "./syz-tmp/newroot/sys/kernel/debug", NULL, bind_mount_flags, NULL) && errno != ENOENT) exit(1); if (mount("/sys/fs/smackfs", "./syz-tmp/newroot/sys/fs/smackfs", NULL, bind_mount_flags, NULL) && errno != ENOENT) exit(1); if (mount("/proc/sys/fs/binfmt_misc", "./syz-tmp/newroot/proc/sys/fs/binfmt_misc", NULL, bind_mount_flags, NULL) && errno != ENOENT) exit(1); if (mkdir("./syz-tmp/newroot/syz-inputs", 0700)) exit(1); if (mount("/syz-inputs", "./syz-tmp/newroot/syz-inputs", NULL, bind_mount_flags | MS_RDONLY, NULL) && errno != ENOENT) exit(1); if (mkdir("./syz-tmp/pivot", 0777)) exit(1); if (syscall(SYS_pivot_root, "./syz-tmp", "./syz-tmp/pivot")) { if (chdir("./syz-tmp")) exit(1); } else { if (chdir("/")) exit(1); if (umount2("./pivot", MNT_DETACH)) exit(1); } if (chroot("./newroot")) exit(1); if (chdir("/")) exit(1); setup_gadgetfs(); setup_binderfs(); setup_fusectl(); } static void setup_gadgetfs() { if (mkdir("/dev/gadgetfs", 0777)) { } if (mount("gadgetfs", "/dev/gadgetfs", "gadgetfs", 0, NULL)) { } } static void setup_fusectl() { if (mount(0, "/sys/fs/fuse/connections", "fusectl", 0, 0)) { } } static void setup_binderfs() { if (mkdir("/dev/binderfs", 0777)) { } if (mount("binder", "/dev/binderfs", "binder", 0, NULL)) { } if (symlink("/dev/binderfs", "./binderfs")) { } } static void loop(); static void sandbox_common() { prctl(PR_SET_PDEATHSIG, SIGKILL, 0, 0, 0); if (getppid() == 1) exit(1); struct rlimit rlim; rlim.rlim_cur = rlim.rlim_max = (200 << 20); setrlimit(RLIMIT_AS, &rlim); rlim.rlim_cur = rlim.rlim_max = 32 << 20; setrlimit(RLIMIT_MEMLOCK, &rlim); rlim.rlim_cur = rlim.rlim_max = 136 << 20; setrlimit(RLIMIT_FSIZE, &rlim); rlim.rlim_cur = rlim.rlim_max = 1 << 20; setrlimit(RLIMIT_STACK, &rlim); rlim.rlim_cur = rlim.rlim_max = 128 << 20; setrlimit(RLIMIT_CORE, &rlim); rlim.rlim_cur = rlim.rlim_max = 256; setrlimit(RLIMIT_NOFILE, &rlim); if (unshare(CLONE_NEWNS)) { } if (mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, NULL)) { } if (unshare(CLONE_NEWIPC)) { } if (unshare(0x02000000)) { } if (unshare(CLONE_NEWUTS)) { } if (unshare(CLONE_SYSVSEM)) { } typedef struct { const char* name; const char* value; } sysctl_t; static const sysctl_t sysctls[] = { {"/proc/sys/kernel/shmmax", "16777216"}, {"/proc/sys/kernel/shmall", "536870912"}, {"/proc/sys/kernel/shmmni", "1024"}, {"/proc/sys/kernel/msgmax", "8192"}, {"/proc/sys/kernel/msgmni", "1024"}, {"/proc/sys/kernel/msgmnb", "1024"}, {"/proc/sys/kernel/sem", "1024 1048576 500 1024"}, }; unsigned i; for (i = 0; i < sizeof(sysctls) / sizeof(sysctls[0]); i++) write_file(sysctls[i].name, sysctls[i].value); } static int wait_for_loop(int pid) { if (pid < 0) exit(1); int status = 0; while (waitpid(-1, &status, __WALL) != pid) { } return WEXITSTATUS(status); } static void drop_caps(void) { struct __user_cap_header_struct cap_hdr = {}; struct __user_cap_data_struct cap_data[2] = {}; cap_hdr.version = _LINUX_CAPABILITY_VERSION_3; cap_hdr.pid = getpid(); if (syscall(SYS_capget, &cap_hdr, &cap_data)) exit(1); const int drop = (1 << CAP_SYS_PTRACE) | (1 << CAP_SYS_NICE); cap_data[0].effective &= ~drop; cap_data[0].permitted &= ~drop; cap_data[0].inheritable &= ~drop; if (syscall(SYS_capset, &cap_hdr, &cap_data)) exit(1); } static int do_sandbox_none(void) { if (unshare(CLONE_NEWPID)) { } int pid = fork(); if (pid != 0) return wait_for_loop(pid); sandbox_common(); drop_caps(); if (unshare(CLONE_NEWNET)) { } write_file("/proc/sys/net/ipv4/ping_group_range", "0 65535"); sandbox_common_mount_tmpfs(); loop(); exit(1); } uint64_t r[1] = {0xffffffffffffffff}; void loop(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 { // jqfmt_vfsv0: buffer: {6a 71 66 6d 74 3d 76 66 73 76 30} // (length 0xb) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // stripe: fs_opt["stripe", fmt[hex, int32]] { // name: buffer: {73 74 72 69 70 65} (length 0x6) // eq: const = 0x3d (1 bytes) // val: int32 = 0x8 (18 bytes) // } // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // nombcache: buffer: {6e 6f 6d 62 63 61 63 68 65} (length 0x9) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // noinit_itable: buffer: {6e 6f 69 6e 69 74 5f 69 74 61 62 6c // 65} (length 0xd) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // nomblk_io_submit: buffer: {6e 6f 6d 62 6c 6b 5f 69 6f 5f 73 75 // 62 6d 69 74} (length 0x10) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // minixdf: buffer: {6d 69 6e 69 78 64 66} (length 0x7) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // nobarrier: buffer: {6e 6f 62 61 72 72 69 65 72} (length 0x9) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // inode_readahead_blks: fs_opt["inode_readahead_blks", fmt[hex, // flags[ext4_inode_readahead_blks]]] { // name: buffer: {69 6e 6f 64 65 5f 72 65 61 64 61 68 65 61 64 // 5f 62 6c 6b 73} (length 0x14) eq: const = 0x3d (1 bytes) // val: ext4_inode_readahead_blks = 0x0 (18 bytes) // } // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // usrjquota: buffer: {75 73 72 6a 71 75 6f 74 61 3d} (length // 0xa) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // block_validity: buffer: {62 6c 6f 63 6b 5f 76 61 6c 69 64 69 // 74 79} (length 0xe) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // noblock_validity: buffer: {6e 6f 62 6c 6f 63 6b 5f 76 61 6c 69 // 64 69 74 79} (length 0x10) // } // comma: const = 0x2c (1 bytes) // } // fs_opt_elem[ext4_options] { // elem: union ext4_options { // noquota: buffer: {6e 6f 71 75 6f 74 61} (length 0x7) // } // comma: const = 0x2c (1 bytes) // } // } // common: array[fs_opt_elem[fs_options_common]] { // } // null: const = 0x0 (1 bytes) // } // } // chdir: int8 = 0x3 (1 bytes) // size: len = 0x47b (8 bytes) // img: ptr[in, buffer] { // buffer: (compressed buffer with length 0x47b) // } // ] // returns fd_dir memcpy((void*)0x200000000100, "ext4\000", 5); memcpy((void*)0x200000000240, "./file0\000", 8); memcpy((void*)0x200000000340, "jqfmt=vfsv0", 11); *(uint8_t*)0x20000000034b = 0x2c; memcpy((void*)0x20000000034c, "stripe", 6); *(uint8_t*)0x200000000352 = 0x3d; sprintf((char*)0x200000000353, "0x%016llx", (long long)8); *(uint8_t*)0x200000000365 = 0x2c; memcpy((void*)0x200000000366, "nombcache", 9); *(uint8_t*)0x20000000036f = 0x2c; memcpy((void*)0x200000000370, "noinit_itable", 13); *(uint8_t*)0x20000000037d = 0x2c; memcpy((void*)0x20000000037e, "nomblk_io_submit", 16); *(uint8_t*)0x20000000038e = 0x2c; memcpy((void*)0x20000000038f, "minixdf", 7); *(uint8_t*)0x200000000396 = 0x2c; memcpy((void*)0x200000000397, "nobarrier", 9); *(uint8_t*)0x2000000003a0 = 0x2c; memcpy((void*)0x2000000003a1, "inode_readahead_blks", 20); *(uint8_t*)0x2000000003b5 = 0x3d; sprintf((char*)0x2000000003b6, "0x%016llx", (long long)0); *(uint8_t*)0x2000000003c8 = 0x2c; memcpy((void*)0x2000000003c9, "usrjquota=", 10); *(uint8_t*)0x2000000003d3 = 0x2c; memcpy((void*)0x2000000003d4, "block_validity", 14); *(uint8_t*)0x2000000003e2 = 0x2c; memcpy((void*)0x2000000003e3, "noblock_validity", 16); *(uint8_t*)0x2000000003f3 = 0x2c; memcpy((void*)0x2000000003f4, "noquota", 7); *(uint8_t*)0x2000000003fb = 0x2c; *(uint8_t*)0x2000000003fc = 0; memcpy( (void*)0x200000000bc0, "\x78\x9c\xec\xdc\xcf\x6f\x14\x55\x1c\x00\xf0\xef\xcc\xb6\x20\x3f\x5b\x11" "\x7f\x80\xa8\x55\x62\x6c\xfc\xd1\xd2\x82\xca\xc1\x83\x1a\x4d\x3c\x60\x34" "\xd1\x03\x1e\x6b\x5b\x08\x61\xa1\x86\xd6\x44\x08\x91\x6a\x0c\x5e\x4c\x0c" "\x51\xcf\xc6\xa3\x89\xff\x80\xde\xbc\x18\xf5\x64\x62\xe2\x49\xef\x86\x84" "\x28\x17\xd0\x53\xcd\xcc\xce\xc0\xee\xba\xdb\x2e\xb4\xdd\x52\xf6\xf3\x49" "\x66\x79\x6f\xe6\x4d\xdf\x7b\xfb\xe6\xcd\xbc\x99\x37\x4b\x00\x3d\x6b\x28" "\xfb\x48\x22\xb6\x46\xc4\xef\x11\x31\x50\x8b\x36\x26\x18\xaa\xfd\x73\xf5" "\xf2\xd9\xc9\x7f\x2e\x9f\x9d\x4c\x62\x61\xe1\x8d\xbf\x92\x3c\xdd\x95\xcb" "\x67\x27\xcb\xa4\xe5\x7e\x5b\x8a\xc8\x70\x1a\x91\x7e\x94\x14\x99\x34\x9a" "\x3d\x7d\xe6\xf8\x44\xb5\x3a\x7d\xaa\x88\x8f\xce\x9d\x78\x67\x74\xf6\xf4" "\x99\xa7\x8e\x9d\x98\x38\x3a\x7d\x74\xfa\xe4\xf8\xc1\x83\x07\xf6\x8f\x3d" "\xfb\xcc\xf8\xd3\x8b\x94\x7e\x63\x44\x3c\xdf\x51\x3d\xb3\x7a\x5d\xd9\xfd" "\xfe\xcc\x9e\x5d\xaf\xbc\x75\xe1\xd5\xc9\xc3\x17\xde\xfe\xe9\x9b\xac\xbc" "\x5b\x8b\xed\xf5\xf5\x58\x29\x43\x59\xc5\xff\x5e\xc8\xd5\xad\xfe\x2c\xfb" "\x78\x74\xa5\x33\x5b\x63\xdb\xea\xc2\x49\x5f\x9b\x44\xdf\x1e\xf8\xad\xda" "\xa5\xf2\xd0\x99\x4a\x44\x64\xcd\xd5\x9f\xf7\xff\x81\xa8\xc4\xf5\xc6\x1b" "\x88\x97\x3f\x5c\xd3\xc2\x01\xab\x2a\xbb\x36\x6d\x6c\xbf\x79\x7e\x01\xb8" "\x8d\x25\xd1\x61\xb2\xe8\x2c\x21\xb0\x5e\x94\x17\xfa\xec\xfe\xb7\x5c\xba" "\x34\xf4\xb8\x25\x5c\x7a\xa1\x76\x03\x94\xd5\xfb\x6a\xb1\xd4\xb6\xf4\x45" "\x5a\xa4\xe9\x6f\xba\xbf\x5d\x49\x43\x11\x71\x78\xfe\xdf\x2f\xb3\x25\x56" "\xe9\x39\x04\x00\x40\xbd\x4f\x26\xbf\x38\x14\x4f\xb6\x1a\xff\xa5\x71\x4f" "\x5d\xba\xed\xc5\x1c\xca\x60\x44\xdc\x19\x11\x3b\x22\xe2\xae\x88\xd8\x19" "\x11\x77\x47\xe4\x69\xef\x8d\x88\xfb\xda\xe6\xb4\xa1\xe5\xda\xe6\xa9\xa1" "\x86\xf1\x4f\x3e\xa1\x94\x5e\x5c\x56\x05\x97\x90\x8d\xff\x9e\x2b\xe6\xb6" "\x1a\xc7\x7f\xe5\xe8\xaf\x32\x58\x29\x62\xdb\xf2\xfa\xf7\x27\x47\x8e\x55" "\xa7\xf7\x15\xdf\xc9\x70\xf4\x6f\xcc\xe2\x63\x8b\xe4\xf1\xfd\x4b\xbf\x7e" "\xda\x6e\x5b\xfd\xf8\x2f\x5b\xb2\xfc\xcb\xb1\x60\x51\x8e\x8b\x7d\x4d\x0f" "\xe8\xa6\x26\xe6\x26\xf2\x41\xe9\x0a\xb8\xf4\x41\xc4\xee\xbe\x56\xf5\x4f" "\xae\xcd\x04\x64\xcd\xb0\x2b\x22\x76\x77\xf8\x37\x8b\xfd\xb6\x97\xf1\x63" "\x8f\x7f\xbd\xa7\x5d\xda\xa5\xeb\xbf\x74\x46\xcb\xb1\xf0\x55\xc4\x63\xb5" "\xf6\x9f\x8f\xa6\xfa\x97\x92\xc5\xe7\x27\x47\xef\x88\xea\xf4\xbe\xd1\xf2" "\xa8\xf8\xbf\x9f\x7f\x39\xff\x7a\xbb\xfc\x97\x55\xff\x15\x90\xb5\xff\xe6" "\xc6\xe3\xbf\x39\xc9\x60\x52\x3f\x5f\x3b\x7b\xe3\x79\x9c\xff\xe3\xe3\xb6" "\xf7\x34\x37\x7b\xfc\x6f\x48\xde\xcc\xdb\xa5\x3c\xab\xbc\x37\x31\x37\x77" "\x6a\x2c\x62\x43\x72\x28\x8f\x37\xac\x1f\xbf\xbe\x6f\x19\x2f\xd3\x67\xf5" "\x1f\xde\xdb\xba\xff\xef\xa8\x05\x36\x65\x1f\xf7\x47\x44\x76\x10\x3f\x10" "\x11\x0f\x46\xc4\x43\x45\xd9\x1f\x8e\x88\x47\x22\x62\xef\x22\xf5\xff\xf1" "\xc5\xf6\xdb\x6e\x85\xf6\x9f\x6a\x79\xfe\xbb\x76\xfc\x37\xb5\xff\x8d\x07" "\x2a\xc7\x7f\xf8\xae\x5d\xfe\x9d\xb5\xff\x81\x3c\x34\x5c\xac\xc9\xcf\x7f" "\x4b\xe8\xb4\x80\xcb\xf9\xee\x00\x00\x00\x60\xbd\x48\xf3\x77\xe0\x93\x74" "\xe4\x5a\x38\x4d\x47\x46\x6a\xef\xf0\xef\x8c\xcd\x69\x75\x66\x76\xee\x89" "\x23\x33\xef\x9e\x9c\xaa\xbd\x2b\x3f\x18\xfd\x69\xf9\xa4\x6b\xa0\xee\x79" "\xe8\x58\x32\x5f\xfc\xc5\x5a\x7c\xbc\x78\x56\x5c\x6e\xdf\x5f\x3c\x37\xfe" "\xbc\xb2\x29\x8f\x8f\x4c\xce\x54\xa7\xd6\xb8\xee\xd0\xeb\xb6\xb4\xe9\xff" "\x99\x3f\x2b\x6b\x5d\x3a\x60\xd5\xb5\x9a\x47\x1b\x6f\x39\x5f\xdb\xf0\x43" "\x36\xe0\x36\xd0\xdc\xff\xd3\xc6\xe8\xb9\xd7\xba\x59\x18\xa0\xab\x56\xe0" "\x3d\x1a\x60\x9d\x5a\xa2\xff\xa7\xdd\x2a\x07\xd0\x7d\xae\xff\xd0\xbb\x5a" "\xf5\xff\x73\x4d\x71\x73\x01\x70\x7b\x72\xfd\x87\xde\xa5\xff\x43\xef\xd2" "\xff\xa1\x77\xe9\xff\xd0\x93\x96\xf3\xbb\xfe\x5e\x0e\x64\xa7\xcc\x5b\xa0" "\x18\xd5\x81\xa2\x1d\x6f\x74\xf7\xf2\xed\xce\x9b\xcf\x3d\xd2\xb5\xae\xbb" "\xc0\x6a\x04\x5a\xff\x3f\x4d\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\xeb\xd5\x7f\x01\x00\x00\xff\xff\x2a\xbd\xe4\x00", 1147); syz_mount_image(/*fs=*/0x200000000100, /*dir=*/0x200000000240, /*flags=MS_I_VERSION|MS_NOATIME|0x300*/ 0x800700, /*opts=*/0x200000000340, /*chdir=*/3, /*size=*/0x47b, /*img=*/0x200000000bc0); // mount$incfs arguments: [ // src: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8) // } // dst: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 30 00} (length 0x8) // } // type: ptr[in, buffer] { // buffer: {69 6e 63 72 65 6d 65 6e 74 61 6c 2d 66 73 00} (length 0xf) // } // flags: mount_flags = 0x82 (8 bytes) // opts: nil // ] memcpy((void*)0x200000000080, "./file0\000", 8); memcpy((void*)0x200000000140, "./file0\000", 8); memcpy((void*)0x200000000000, "incremental-fs\000", 15); syscall(__NR_mount, /*src=*/0x200000000080ul, /*dst=*/0x200000000140ul, /*type=*/0x200000000000ul, /*flags=MS_NOSUID|MS_DIRSYNC*/ 0x82ul, /*opts=*/0ul); // openat$dir arguments: [ // fd: const = 0xffffffffffffff9c (8 bytes) // file: ptr[in, buffer] { // buffer: {2e 00} (length 0x2) // } // flags: open_flags = 0x0 (4 bytes) // mode: open_mode = 0x0 (2 bytes) // ] // returns fd_dir memcpy((void*)0x200000000000, ".\000", 2); res = syscall(__NR_openat, /*fd=*/0xffffffffffffff9cul, /*file=*/0x200000000000ul, /*flags=*/0, /*mode=*/0); if (res != -1) r[0] = res; // unlinkat arguments: [ // fd: fd_dir (resource) // path: ptr[in, buffer] { // buffer: {2e 2f 66 69 6c 65 31 00} (length 0x8) // } // flags: unlinkat_flags = 0x200 (8 bytes) // ] memcpy((void*)0x200000000340, "./file1\000", 8); syscall(__NR_unlinkat, /*fd=*/r[0], /*path=*/0x200000000340ul, /*flags=AT_REMOVEDIR*/ 0x200ul); } 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; do_sandbox_none(); return 0; }