// https://syzkaller.appspot.com/bug?id=b30ea69cb87bce1089eefd3969b308f63c4e218c // 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 #ifndef __NR_memfd_create #define __NR_memfd_create 319 #endif static unsigned long long procid; //% 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; } uint64_t r[2] = {0xffffffffffffffff, 0xffffffffffffffff}; int main(void) { syscall(__NR_mmap, /*addr=*/0x3ffffffff000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); syscall(__NR_mmap, /*addr=*/0x400000000000ul, /*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=*/0x400001000000ul, /*len=*/0x1000ul, /*prot=*/0ul, /*flags=MAP_FIXED|MAP_ANONYMOUS|MAP_PRIVATE*/ 0x32ul, /*fd=*/-1, /*offset=*/0ul); const char* reason; (void)reason; intptr_t res = 0; if (write(1, "executing program\n", sizeof("executing program\n") - 1)) { } memcpy((void*)0x4000000004c0, "ext4\000", 5); memcpy((void*)0x400000000000, "./file0\000", 8); *(uint8_t*)0x400000000340 = 0; memcpy( (void*)0x400000000540, "\x78\x9c\xec\xdd\xcf\x6f\x23\x57\x1d\x00\xf0\xef\x4c\xe2\x4d\x9a\xa6\x4d" "\x0a\x95\x0a\x08\xe8\x52\x0a\x0b\x5a\xad\x9d\x78\xdb\xa8\xea\xa9\x5c\x40" "\xa8\xaa\x84\xa8\x38\x71\x48\x43\xe2\x8d\xa2\xd8\x71\x14\x3b\xa5\x09\x2b" "\x35\xf9\x1f\x90\xa8\xc4\x01\xc1\x89\x33\x07\x24\x0e\x95\x7a\xe2\x88\xe0" "\x06\xb7\xbd\x2c\x07\xa4\x05\x56\xa0\x0d\x12\x07\xa3\xf1\x8f\x6c\x76\x63" "\x27\x61\xd7\xb1\x55\xfb\xf3\x91\x46\x33\x6f\xde\x78\xbe\xef\xad\x35\xef" 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"\xf9\x7f\x18\x5f\xf2\xff\x30\xbe\xe4\xff\x61\x7c\x35\x1a\x49\xaf\x35\xff" "\xd3\xe3\x4b\x00\x80\x91\x22\xc7\x0f\x0c\xf4\xe7\xff\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x30\x22\x66\x9b\xdb\xfc\x89\x72\x9a\xe6\xf3\x11\xcf\x45\xc4\x7c\xe4" "\x92\x5b\x1b\xe5\xd2\x42\x44\x3c\x1f\x11\x7f\x9e\xca\x4d\x65\xe5\xc5\xa1" "\xb6\x18\x00\x78\x7a\xe9\xdf\x92\xf6\xfa\x5f\xd7\xe6\x5e\x9d\x7d\xbc\xf6" "\x4a\xf2\x9f\xa9\xe6\x3e\x22\x7e\xfc\xf3\x77\x7f\xf6\xc1\x4a\xbd\xbe\xb3" "\x98\x9d\xff\xe7\xf1\xf9\xfa\x47\xed\xf3\xc5\x61\xb4\x1f\x00\x38\x4f\x67" "\x9e\xee\xcc\xe3\x1d\x0f\xee\xdf\x5e\xed\x6c\x83\x6c\xcf\xbd\x6f\xb5\x16" "\x17\xcd\xe2\x1e\xb5\xb7\x56\xcd\x64\x4c\x66\xbb\x3f\x4e\x47\x2e\x22\x66" "\xfe\x95\xb4\xca\x6d\xd9\xe7\x95\x89\x3e\xc4\x3f\x38\x8c\x88\xcf\x75\xeb" "\x7f\xd2\xcc\x8d\xcc\xb7\x57\x3e\x7d\x3c\x7e\x16\xfb\xb9\x81\xc6\x4f\x1f" "\x89\x9f\x36\xeb\x5a\xfb\xec\xdf\xe2\xb3\xa7\xee\x3c\xd5\x33\xe6\x79\x6b" "\xbd\xc2\xb8\xf8\x24\x1b\x7f\xde\xea\xf6\xfc\xa5\x71\xb5\xb9\x9f\xee\xba" "\xf8\xf1\x74\x73\x84\x7a\x7a\x9d\xf1\xef\xe8\xd4\xf8\xd7\x79\xde\xa7\x9b" "\x63\x4d\xb7\xf1\xef\xea\x45\x63\xbc\xf6\xfb\xef\xf6\xac\x3b\x8c\xf8\xc2" "\x64\xb7\xf8\xc9\x71\xfc\xa4\x47\xfc\x57\x2f\x18\xff\xce\x17\xbf\xfc\x4a" "\xaf\xba\xc6\x2f\x23\xae\x45\xf7\xf8\x27\x63\x15\xea\x95\xed\x42\x6d\x6f" "\xff\xc6\x46\x65\x65\xbd\xb4\x5e\xda\x2a\x16\x97\x16\x97\x16\xde\xb8\xf9" "\x7a\xb1\xd0\xcc\x51\x17\x3a\x99\xea\xd3\xfe\xfe\xe6\xf5\xe7\x7b\xf6\xff" "\xd7\x11\x33\x3d\xe2\x4f\x9f\xd3\xff\xaf\x9d\xd9\xeb\xc6\xf1\x00\xfc\xab" "\xff\xbe\xf7\xc3\xaf\xf4\x8a\x7f\x18\xf1\x8d\xaf\x76\x7f\xff\x5f\x3c\x23" "\x7e\x36\x27\x7e\xfd\xcc\xf8\x0f\xad\xcc\xfc\xb6\xe7\xf2\xdd\x59\xfc\xb5" "\x56\xff\x0f\xff\xdf\xf7\xff\xfa\x05\xe3\xdf\xfd\xeb\xfe\xda\x05\x2f\x05" "\x00\x06\xa0\xb6\xb7\xbf\xb9\x52\x2e\x97\x76\xfa\x7a\x90\x8b\x3e\xdf\xf0" "\xc4\x41\x72\x49\x6d\x76\x30\xe2\x07\xd9\xe7\xf1\xa7\xbd\xcf\x4b\xed\x94" "\x59\xd7\x6b\xfe\xf0\x8b\x8f\x5f\xca\x2a\x87\xde\xd3\xbe\x1c\x0c\x79\x60" "\x02\x2e\xdd\xc3\x87\x7e\xd8\x2d\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x7a\xb9\xf4\x3f\x27\x4a\x87\xdd\x43\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00" "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x46" "\xd9\xff\x02\x00\x00\xff\xff\x3c\x10\xcb\x2f", 1271); syz_mount_image(/*fs=*/0x4000000004c0, /*dir=*/0x400000000000, /*flags=MS_MANDLOCK*/ 0x40, /*opts=*/0x400000000340, /*chdir=*/0, /*size=*/0x4f7, /*img=*/0x400000000540); memcpy((void*)0x400000000440, "./bus\000", 6); syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x400000000440ul, /*flags=O_SYNC|O_NONBLOCK|O_NOATIME|O_CREAT|O_RDWR*/ 0x141842, /*mode=*/0); memcpy((void*)0x400000000380, "/dev/loop", 9); *(uint8_t*)0x400000000389 = 0x30; *(uint8_t*)0x40000000038a = 0; memcpy((void*)0x400000000140, "./bus\000", 6); syscall(__NR_mount, /*src=*/0x400000000380ul, /*dst=*/0x400000000140ul, /*type=*/0ul, /*flags=MS_BIND*/ 0x1000ul, /*data=*/0ul); memcpy((void*)0x400000000240, "./bus\000", 6); res = syscall( __NR_open, /*file=*/0x400000000240ul, /*flags=O_SYNC|O_NOCTTY|O_DIRECT|O_CLOEXEC|FASYNC|0x2*/ 0x187102ul, /*mode=S_IXOTH*/ 1ul); if (res != -1) r[0] = res; syscall(__NR_mmap, /*addr=*/0x400000000000ul, /*len=*/0x800000ul, /*prot=PROT_WRITE*/ 2ul, /*flags=MAP_STACK|MAP_POPULATE|MAP_FIXED|MAP_SHARED*/ 0x28011ul, /*fd=*/r[0], /*offset=*/0ul); memcpy((void*)0x400000000240, "./file0\000", 8); syscall(__NR_chdir, /*dir=*/0x400000000240ul); *(uint16_t*)0x400000000400 = 1; memcpy( (void*)0x400000000402, "\351\037q\211Y\036\2223aK\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_bind, /*fd=*/-1, /*addr=*/0x400000000400ul, /*addrlen=*/0x6eul); memcpy((void*)0x4000000001c0, "blkio.bfq.avg_queue_size\000", 25); res = syscall(__NR_openat, /*fd=*/0xffffff9c, /*file=*/0x4000000001c0ul, /*flags=*/0x275a, /*mode=*/0); if (res != -1) r[1] = res; memcpy((void*)0x400000000000, "#! ", 3); *(uint8_t*)0x400000000003 = 0xa; syscall(__NR_write, /*fd=*/r[1], /*data=*/0x400000000000ul, /*len=*/0x208e24bul); return 0; }