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Taylor Blau c793f9cb08 attr.c: move ATTR_MAX_FILE_SIZE check into read_attr_from_buf()
Commit 3c50032ff5 (attr: ignore overly large gitattributes files,
2022-12-01) added a defense-in-depth check to ensure that .gitattributes
blobs read from the index do not exceed ATTR_MAX_FILE_SIZE (100 MB).

But there were two cases added shortly after 3c50032ff5 was written
which do not apply similar protections:

  - 47cfc9bd7d (attr: add flag `--source` to work with tree-ish,
    2023-01-14)

  - 4723ae1007 (attr.c: read attributes in a sparse directory,
    2023-08-11) added a similar

Ensure that we refuse to process a .gitattributes blob exceeding
ATTR_MAX_FILE_SIZE when reading from either an arbitrary tree object or
a sparse directory. This is done by pushing the ATTR_MAX_FILE_SIZE check
down into the low-level `read_attr_from_buf()`.

In doing so, plug a leak in `read_attr_from_index()` where we would
accidentally leak the large buffer upon detecting it is too large to
process.

(Since `read_attr_from_buf()` handles a NULL buffer input, we can remove
a NULL check before calling it in `read_attr_from_index()` as well).

Co-authored-by: Jeff King <peff@peff.net>
Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2024-05-03 12:44:16 -07:00
.github l10n: ci: disable cache for setup-go to suppress warnings 2024-02-16 11:51:19 +08:00
Documentation Git 2.43.3 2024-02-22 16:14:53 -08:00
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builtin Merge branch 'js/check-null-from-read-object-file' 2024-02-14 15:36:06 -08:00
ci Merge branch 'js/ci-discard-prove-state' into maint-2.43 2024-02-08 16:22:00 -08:00
compat Merge branch 'js/win32-retry-pipe-write-on-enospc' into maint-2.43 2024-02-13 14:44:51 -08:00
contrib Merge branch 'pb/complete-config' 2024-02-14 15:36:06 -08:00
ewah
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gitk-git
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mergetools
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po l10n: zh_TW: Git 2.44 2024-02-18 21:03:43 +08:00
refs
reftable Merge branch 'jc/comment-style-fixes' into maint-2.43 2024-02-13 14:44:48 -08:00
sha1
sha1collisiondetection@855827c583
sha1dc
sha256
t attr.c: move ATTR_MAX_FILE_SIZE check into read_attr_from_buf() 2024-05-03 12:44:16 -07:00
templates Merge branch 'jp/use-diff-index-in-pre-commit-sample' into maint-2.43 2024-02-08 16:22:02 -08:00
trace2 Merge branch 'en/header-cleanup' into maint-2.43 2024-02-08 16:22:10 -08:00
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GIT-VERSION-GEN Git 2.43.3 2024-02-22 16:14:53 -08:00
INSTALL Merge branch 'js/update-urls-in-doc-and-comment' into maint-2.43 2024-02-08 16:22:01 -08:00
LGPL-2.1
Makefile Merge branch 'js/update-urls-in-doc-and-comment' into maint-2.43 2024-02-08 16:22:01 -08:00
README.md Merge branch 'jc/majordomo-to-subspace' into maint-2.43 2024-02-13 14:44:50 -08:00
RelNotes Git 2.43.3 2024-02-22 16:13:38 -08:00
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sideband.c Merge branch 'cp/sideband-array-index-comment-fix' into maint-2.43 2024-02-08 16:22:12 -08:00
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README.md

Build status

Git - fast, scalable, distributed revision control system

Git is a fast, scalable, distributed revision control system with an unusually rich command set that provides both high-level operations and full access to internals.

Git is an Open Source project covered by the GNU General Public License version 2 (some parts of it are under different licenses, compatible with the GPLv2). It was originally written by Linus Torvalds with help of a group of hackers around the net.

Please read the file INSTALL for installation instructions.

Many Git online resources are accessible from https://git-scm.com/ including full documentation and Git related tools.

See Documentation/gittutorial.txt to get started, then see Documentation/giteveryday.txt for a useful minimum set of commands, and Documentation/git-<commandname>.txt for documentation of each command. If git has been correctly installed, then the tutorial can also be read with man gittutorial or git help tutorial, and the documentation of each command with man git-<commandname> or git help <commandname>.

CVS users may also want to read Documentation/gitcvs-migration.txt (man gitcvs-migration or git help cvs-migration if git is installed).

The user discussion and development of Git take place on the Git mailing list -- everyone is welcome to post bug reports, feature requests, comments and patches to git@vger.kernel.org (read Documentation/SubmittingPatches for instructions on patch submission and Documentation/CodingGuidelines).

Those wishing to help with error message, usage and informational message string translations (localization l10) should see po/README.md (a po file is a Portable Object file that holds the translations).

To subscribe to the list, send an email to git+subscribe@vger.kernel.org (see https://subspace.kernel.org/subscribing.html for details). The mailing list archives are available at https://lore.kernel.org/git/, https://marc.info/?l=git and other archival sites.

Issues which are security relevant should be disclosed privately to the Git Security mailing list git-security@googlegroups.com.

The maintainer frequently sends the "What's cooking" reports that list the current status of various development topics to the mailing list. The discussion following them give a good reference for project status, development direction and remaining tasks.

The name "git" was given by Linus Torvalds when he wrote the very first version. He described the tool as "the stupid content tracker" and the name as (depending on your mood):

  • random three-letter combination that is pronounceable, and not actually used by any common UNIX command. The fact that it is a mispronunciation of "get" may or may not be relevant.
  • stupid. contemptible and despicable. simple. Take your pick from the dictionary of slang.
  • "global information tracker": you're in a good mood, and it actually works for you. Angels sing, and a light suddenly fills the room.
  • "goddamn idiotic truckload of sh*t": when it breaks