S03 hardlink-missing-targetA hardlink to a member that is not in the archive.
Reject(draft) A strict parser must reject this archive.
S03-hardlink-missing-target.tar |
test archive, 1,536 bytes
sha256 3ae5def1b0b0062b91fbb67f5340492a6c840573b85f4c371e69e1ea23557ca3 |
S03-hardlink-missing-target.json | expected result |
S03-hardlink-missing-target.txt | annotated blocks |
S03-hardlink-missing-target.py | generator script |
The member h is a hardlink to missing. In POSIX, the target of a hardlink is a file previously archived, which missing is not. Read leniently, this case is ambiguous because the link is skipped, made to a file of that name that already exists where the archive is extracted, or made an empty file.
Decision point: what a hardlink to nothing does.
Seen in: none of the scanned tarballs.
Every block of 512 bytes, to scale, with its offset. Hover over a field for its bytes.
S03-hardlink-missing-target: must reject
A hardlink to a member that is not in the archive.
The member `h` is a hardlink to `missing`. In POSIX, the target of a hardlink is a file previously
archived, which `missing` is not. Read leniently, this case is ambiguous because the link is
skipped, made to a file of that name that already exists where the archive is extracted, or made
an empty file.
Decision point: what a hardlink to nothing does.
Seen in: none of the scanned tarballs.
0x000000 header: hardlink
name [ 0,100) "h" + 99 NUL
mode [100,108) "0000644" + NUL 644 (octal)
uid [108,116) "0000000" + NUL 0
gid [116,124) "0000000" + NUL 0
size [124,136) "00000000000" + NUL 0
mtime [136,148) "00000000000" + NUL 0
chksum [148,156) "010740\0 " 4576: the unsigned sum of the header, this field as spaces
typeflag [156,157) "1" hardlink
linkname [157,257) "missing" + 93 NUL
magic [257,263) "ustar" + NUL
version [263,265) "00"
uname [265,297) 32 NUL
gname [297,329) 32 NUL
devmajor [329,337) "0000000" + NUL 0
devminor [337,345) "0000000" + NUL 0
prefix [345,500) 155 NUL
pad [500,512) 12 NUL
0x000200 2 zero blocks: the end-of-archive marker
0x000600 end of file
As xxd writes it: xxd -r makes the archive of it.
00000000: 6800 0000 0000 0000 0000 0000 0000 0000 h............... 00000010: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000020: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000030: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000040: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000050: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000060: 0000 0000 3030 3030 3634 3400 3030 3030 ....0000644.0000 00000070: 3030 3000 3030 3030 3030 3000 3030 3030 000.0000000.0000 00000080: 3030 3030 3030 3000 3030 3030 3030 3030 0000000.00000000 00000090: 3030 3000 3031 3037 3430 0020 316d 6973 000.010740. 1mis 000000a0: 7369 6e67 0000 0000 0000 0000 0000 0000 sing............ 000000b0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000000c0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000000d0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000000e0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000000f0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000100: 0075 7374 6172 0030 3000 0000 0000 0000 .ustar.00....... 00000110: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000120: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000130: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000140: 0000 0000 0000 0000 0030 3030 3030 3030 .........0000000 00000150: 0030 3030 3030 3030 0000 0000 0000 0000 .0000000........ 00000160: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000170: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000180: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000190: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000001a0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000001b0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000001c0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000001d0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000001e0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000001f0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000200: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000210: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000220: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000230: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000240: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000250: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000260: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000270: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000280: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000290: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000002a0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000002b0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000002c0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000002d0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000002e0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000002f0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000300: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000310: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000320: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000330: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000340: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000350: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000360: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000370: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000380: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000390: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000003a0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000003b0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000003c0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000003d0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000003e0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000003f0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000400: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000410: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000420: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000430: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000440: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000450: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000460: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000470: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000480: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000490: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000004a0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000004b0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000004c0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000004d0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000004e0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000004f0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000500: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000510: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000520: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000530: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000540: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000550: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000560: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000570: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000580: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 00000590: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000005a0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000005b0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000005c0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000005d0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000005e0: 0000 0000 0000 0000 0000 0000 0000 0000 ................ 000005f0: 0000 0000 0000 0000 0000 0000 0000 0000 ................
| implementation | version | outcome | what it makes of it |
|---|---|---|---|
| GNU tar | tar (GNU tar) 1.35 | ✅ as the verdict says | error: tar: h: Cannot hard link to ‘missing’: No such file or directory tar: Exiting with failure status due to previous errors |
| bsdtar | bsdtar 3.8.10 - libarchive 3.8.10 | ✅ as the verdict says | error: h: Hard-link target 'missing' does not exist: No such file or directory bsdtar: Error exit delayed from previous errors |
| BusyBox tar | BusyBox v1.38.0, defconfig | ✅ as the verdict says | error: tar: can't create hardlink 'h' to 'missing' |
| 7-Zip | 7-Zip (z) 26.05 (x64) | ✅ as the verdict says | error: ERROR: Cannot create hard link : errno=2 : No such file or directory : DEST/h : DEST/missing |
| Python tarfile, filter=data, as in pip | CPython 3.15.2 | ✅ as the verdict says | error: KeyError: "linkname 'missing' not found" |
| Python tarfile, filter=tar | CPython 3.15.2 | ✅ as the verdict says | error: KeyError: "linkname 'missing' not found" |
| Python tarfile, filter=fully_trusted | CPython 3.15.2 | ✅ as the verdict says | error: KeyError: "linkname 'missing' not found" |
| node-tar | tar 7.5.22 | ⚠️ accepts | tree A: nothing |
| node-tar, strict | tar 7.5.22 | ✅ as the verdict says | error: Error: ENOENT: no such file or directory, link 'DEST/missing' -> 'DEST/h' |
| tar-fs | tar-fs 3.1.3, on tar-stream 3.2.2 | ✅ as the verdict says | error: Error: DEST/h is not a valid hardlink |
| Java Commons Compress | Commons Compress 1.28.0, Expander, on Java 27.0.1.0.2 | ⚠️ accepts | tree B: h (0 B, e3b0c442) |
| .NET System.Formats.Tar | System.Formats.Tar of .NET 10.0.14, ExtractToDirectory | ✅ as the verdict says | error: FileNotFoundException: Could not find file 'DEST/h'. |
| PHP PharData, as in Composer | PharData of PHP 8.5.12, as Composer's TarDownloader calls it | ✅ as the verdict says | error: UnexpectedValueException: phar error: "suite/archives/S03-hardlink-missing-target.tar" is a corrupted tar file - hard link to non-existent file "missing" |
| Go containerd archive.Apply | containerd v2.4.2, archive.Apply, of go1.27.3 | ✅ as the verdict says | error: link DEST/missing DEST/h: no such file or directory |
| Rust tar | tar 0.4.46, unpack | ✅ as the verdict says | error: failed to unpack `DEST/h` |
| Rust astral-tokio-tar | astral-tokio-tar 0.7.0, unpack | ✅ as the verdict says | error: failed to unpack `DEST/h` |
| Rust tar-codec, as in uv | tar-codec 0.0.15, with the policies of uv 0.13 | ✅ as the verdict says | error: at byte 0: invalid link h -> "missing": hard-link target is not a previously extracted file |
| RubyGems | RubyGems 4.0.20 of Ruby 4.0.9, extract_tar_gz | ⚠️ accepts | tree A: nothing |
| R untar, internal | utils::untar of R 4.6.1, tar = "internal" | ⚠️ accepts | tree A: nothing |
| Perl Archive::Tar | Archive::Tar 3.12 of Perl v5.44.0 | ✅ as the verdict says | error: No such file in archive: 'missing' at contrib/matrix/runners/perl/extract.pl line 14. Could not find file 'missing' in memory. at contrib/matrix/runners/perl/extract.pl line 14. Making hard link from… |
| Haskell tar | tar 0.7.2.0, extract, of GHC 9.14 | ✅ as the verdict says | error: DEST/missing: copyFile:atomicCopyFileContents:withReplacementFile:copyFileToHandle:openFileWithCloseOnExec: does not exist (No such file or directory) |
| Julia Tar.jl | Tar 1.10.0 of Julia 1.13.3 | ✅ as the verdict says | error: Tarball contains hardlink with non-existent target: - path = "h" - target = "missing" Refusing to extract — possible attack! |
| live-bootstrap untar | mescc-tools-extra a151c245e512, as live-bootstrap pins it, built with cc | ✅ as the verdict says | error: unable to create hardlinks |
| live-bootstrap untar, --non-strict | mescc-tools-extra a151c245e512, as live-bootstrap pins it, built with cc | ⚠️ accepts | tree A: nothing |
Release tarballs of Spack, nixpkgs, Guix and live-bootstrap, and samples of PyPI, crates.io and RubyGems with hardlink.missing-target.
| ecosystem | tarballs | with it | share |
|---|---|---|---|
| Spack | 37,553 | 0 | none |
| nixpkgs | 18,990 | 0 | none |
| Guix | 10,168 | 0 | none |
| PyPI | 10,000 | 0 | none |
| crates.io | 5,000 | 0 | none |
| RubyGems | 5,000 | 0 | none |
| live-bootstrap | 171 | 0 | none |
| total (distinct) | 82,586 | 0 | none |