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Adam Dinwoodie bccc37fdc7 cygwin: disallow backslashes in file names
The backslash character is not a valid part of a file name on Windows.
If, in Windows, Git attempts to write a file that has a backslash
character in the filename, it will be incorrectly interpreted as a
directory separator.

This caused CVE-2019-1354 in MinGW, as this behaviour can be manipulated
to cause the checkout to write to files it ought not write to, such as
adding code to the .git/hooks directory.  This was fixed by e1d911dd4c
(mingw: disallow backslash characters in tree objects' file names,
2019-09-12).  However, the vulnerability also exists in Cygwin: while
Cygwin mostly provides a POSIX-like path system, it will still interpret
a backslash as a directory separator.

To avoid this vulnerability, CVE-2021-29468, extend the previous fix to
also apply to Cygwin.

Similarly, extend the test case added by the previous version of the
commit.  The test suite doesn't have an easy way to say "run this test
if in MinGW or Cygwin", so add a new test prerequisite that covers both.

As well as checking behaviour in the presence of paths containing
backslashes, the existing test also checks behaviour in the presence of
paths that differ only by the presence of a trailing ".".  MinGW follows
normal Windows application behaviour and treats them as the same path,
but Cygwin more closely emulates *nix systems (at the expense of
compatibility with native Windows applications) and will create and
distinguish between such paths.  Gate the relevant bit of that test
accordingly.

Reported-by: RyotaK <security@ryotak.me>
Helped-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Adam Dinwoodie <adam@dinwoodie.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2021-04-30 09:49:20 +09:00
.github
Documentation Git 2.31.1 2021-03-26 14:49:41 -07:00
block-sha1 block-sha1: drop trailing semicolon from macro definition 2021-03-17 10:20:01 -07:00
builtin Merge branch 'tb/git-mv-icase-fix' 2021-03-19 15:25:40 -07:00
ci Merge branch 'tb/pack-revindex-on-disk' 2021-02-12 14:21:04 -08:00
compat Sync with Git 2.30.2 for CVE-2021-21300 2021-03-08 16:09:07 -08:00
contrib Merge branch 'rs/xcalloc-takes-nelem-first' 2021-03-19 15:25:39 -07:00
ewah use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
git-gui Merge https://github.com/prati0100/git-gui 2021-03-04 12:38:50 -08:00
gitk-git
gitweb
mergetools mergetools/vimdiff: add vimdiff1 merge tool variant 2021-02-23 11:37:13 -08:00
negotiator use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
perl
po l10n: zh_CN: for git v2.31.0 l10n round 1 and 2 2021-03-15 00:05:25 +08:00
ppc
refs use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
sha1collisiondetection@855827c583
sha1dc
sha256
t cygwin: disallow backslashes in file names 2021-04-30 09:49:20 +09:00
templates
trace2
xdiff
.cirrus.yml
.clang-format
.editorconfig
.gitattributes
.gitignore
.gitmodules
.mailmap
.travis.yml
.tsan-suppressions
CODE_OF_CONDUCT.md
COPYING
GIT-VERSION-GEN Git 2.31.1 2021-03-26 14:49:41 -07:00
INSTALL
LGPL-2.1
Makefile Makefile: update 'make fuzz-all' docs to reflect modern clang 2021-03-08 10:26:25 -08:00
README.md
RelNotes Git 2.31.1 2021-03-26 14:49:41 -07:00
abspath.c
aclocal.m4
add-interactive.c Merge branch 'rs/xcalloc-takes-nelem-first' 2021-03-19 15:25:39 -07:00
add-interactive.h
add-patch.c
advice.c
advice.h
alias.c
alias.h
alloc.c
alloc.h
apply.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
apply.h
archive-tar.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
archive-zip.c
archive.c
archive.h
attr.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
attr.h
banned.h
base85.c
bisect.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
bisect.h
blame.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
blame.h
blob.c
blob.h
bloom.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
bloom.h
branch.c
branch.h
builtin.h
bulk-checkin.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
bulk-checkin.h
bundle.c
bundle.h
cache-tree.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
cache-tree.h
cache.h Sync with Git 2.30.2 for CVE-2021-21300 2021-03-08 16:09:07 -08:00
chdir-notify.c
chdir-notify.h
check-builtins.sh
check_bindir
checkout.c
checkout.h
chunk-format.c chunk-format: restore duplicate chunk checks 2021-02-18 13:38:16 -08:00
chunk-format.h chunk-format: create read chunk API 2021-02-18 13:38:16 -08:00
color.c
color.h
column.c
column.h
combine-diff.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
command-list.txt
commit-graph.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
commit-graph.h
commit-reach.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
commit-reach.h
commit-slab-decl.h
commit-slab-impl.h
commit-slab.h
commit.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
commit.h Merge branch 'bc/signed-objects-with-both-hashes' 2021-02-22 16:12:42 -08:00
common-main.c
config.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
config.h
config.mak.dev
config.mak.in
config.mak.uname Merge branch 'jk/open-returns-eintr' 2021-03-04 15:34:45 -08:00
configure.ac
connect.c Merge branch 'jt/clone-unborn-head' 2021-02-17 17:21:40 -08:00
connect.h
connected.c
connected.h
convert.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
convert.h
copy.c
credential.c
credential.h
csum-file.c
csum-file.h
ctype.c
daemon.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
date.c
decorate.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
decorate.h
delta-islands.c
delta-islands.h
delta.h
detect-compiler
diff-delta.c
diff-lib.c
diff-merges.c
diff-merges.h
diff-no-index.c
diff.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
diff.h Merge branch 'jc/diffcore-rotate' 2021-02-25 16:43:30 -08:00
diffcore-break.c
diffcore-delta.c
diffcore-order.c
diffcore-pickaxe.c
diffcore-rename.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
diffcore-rotate.c diff: --{rotate,skip}-to=<path> 2021-02-16 09:30:42 -08:00
diffcore.h diff: --{rotate,skip}-to=<path> 2021-02-16 09:30:42 -08:00
dir-iterator.c
dir-iterator.h
dir.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
dir.h
editor.c
entry.c write_entry(): fix misuses of `path` in error messages 2021-02-16 11:27:17 -08:00
environment.c
environment.h
exec-cmd.c
exec-cmd.h
fetch-negotiator.c
fetch-negotiator.h
fetch-pack.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
fetch-pack.h
fmt-merge-msg.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
fmt-merge-msg.h
fsck.c Merge branch 'jt/transfer-fsck-across-packs' 2021-03-01 14:02:57 -08:00
fsck.h Merge branch 'jt/transfer-fsck-across-packs' 2021-03-01 14:02:57 -08:00
fsmonitor.c Merge branch 'jh/fsmonitor-prework' 2021-03-19 15:25:37 -07:00
fsmonitor.h fsmonitor: log invocation of FSMonitor hook to trace2 2021-02-16 17:14:34 -08:00
fuzz-commit-graph.c
fuzz-pack-headers.c
fuzz-pack-idx.c
generate-cmdlist.sh
generate-configlist.sh
gettext.c
gettext.h
git-add--interactive.perl
git-archimport.perl
git-bisect.sh
git-compat-util.h git-compat-util.h: drop trailing semicolon from macro definition 2021-03-13 15:56:13 -08:00
git-cvsexportcommit.perl
git-cvsimport.perl
git-cvsserver.perl
git-difftool--helper.sh
git-filter-branch.sh
git-instaweb.sh
git-merge-octopus.sh
git-merge-one-file.sh
git-merge-resolve.sh
git-mergetool--lib.sh Merge branch 'sh/mergetool-hideresolved' 2021-02-17 17:21:41 -08:00
git-mergetool.sh mergetool: do not enable hideResolved by default 2021-03-13 15:30:29 -08:00
git-p4.py
git-quiltimport.sh
git-rebase--preserve-merges.sh
git-request-pull.sh
git-send-email.perl
git-sh-i18n.sh
git-sh-setup.sh
git-submodule.sh
git-svn.perl
git-web--browse.sh
git.c Merge branch 'tb/precompose-prefix-too' 2021-02-12 14:21:04 -08:00
git.rc
gpg-interface.c
gpg-interface.h
graph.c
graph.h
grep.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
grep.h
hash-lookup.c
hash-lookup.h
hash.h
hashmap.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
hashmap.h
help.c
help.h
hex.c
http-backend.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
http-fetch.c http-fetch: allow custom index-pack args 2021-02-22 12:07:40 -08:00
http-push.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
http-walker.c
http.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
http.h http: allow custom index-pack args 2021-02-22 12:07:40 -08:00
ident.c
imap-send.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
iterator.h
json-writer.c
json-writer.h
khash.h
kwset.c
kwset.h
levenshtein.c
levenshtein.h
line-log.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
line-log.h
line-range.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
line-range.h
linear-assignment.c
linear-assignment.h
list-objects-filter-options.c
list-objects-filter-options.h
list-objects-filter.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
list-objects-filter.h
list-objects.c
list-objects.h
list.h
ll-merge.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
ll-merge.h
lockfile.c
lockfile.h
log-tree.c Merge branch 'ab/diff-deferred-free' 2021-02-22 16:12:43 -08:00
log-tree.h
ls-refs.c Merge branch 'jt/clone-unborn-head' 2021-02-17 17:21:40 -08:00
ls-refs.h
mailinfo.c
mailinfo.h
mailmap.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
mailmap.h
match-trees.c
mem-pool.c mem-pool: drop trailing semicolon from macro definition 2021-03-17 10:20:16 -07:00
mem-pool.h
merge-blobs.c
merge-blobs.h
merge-ort-wrappers.c
merge-ort-wrappers.h
merge-ort.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
merge-ort.h
merge-recursive.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
merge-recursive.h
merge.c
mergesort.c
mergesort.h
midx.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
midx.h
name-hash.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
notes-cache.c
notes-cache.h
notes-merge.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
notes-merge.h
notes-utils.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
notes-utils.h
notes.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
notes.h
object-file.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
object-name.c
object-store.h
object.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
object.h
oid-array.c
oid-array.h
oidmap.c
oidmap.h
oidset.c
oidset.h
pack-bitmap-write.c
pack-bitmap.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
pack-bitmap.h
pack-check.c
pack-objects.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
pack-objects.h
pack-revindex.c pack-revindex.c: don't close unopened file descriptors 2021-02-26 14:42:27 -08:00
pack-revindex.h
pack-write.c Merge branch 'jt/transfer-fsck-across-packs' 2021-03-01 14:02:57 -08:00
pack.h Merge branch 'jt/transfer-fsck-across-packs' 2021-03-01 14:02:57 -08:00
packfile.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
packfile.h
pager.c
parse-options-cb.c
parse-options.c
parse-options.h
patch-delta.c
patch-ids.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
patch-ids.h
path.c
path.h
pathspec.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
pathspec.h
pkt-line.c
pkt-line.h
preload-index.c preload-index: log the number of lstat calls to trace2 2021-02-16 17:14:34 -08:00
pretty.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
pretty.h pretty.c: capture invalid trailer argument 2021-02-15 16:48:38 -08:00
prio-queue.c
prio-queue.h
progress.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
progress.h
promisor-remote.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
promisor-remote.h
prompt.c
prompt.h
protocol.c
protocol.h
prune-packed.c
prune-packed.h
quote.c
quote.h
range-diff.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
range-diff.h Merge branch 'js/range-diff-one-side-only' 2021-02-17 17:21:41 -08:00
reachable.c
reachable.h
read-cache.c cygwin: disallow backslashes in file names 2021-04-30 09:49:20 +09:00
rebase-interactive.c
rebase-interactive.h
rebase.c
rebase.h
ref-filter.c Merge branch 'rs/xcalloc-takes-nelem-first' 2021-03-19 15:25:39 -07:00
ref-filter.h
reflog-walk.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
reflog-walk.h
refs.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
refs.h
refspec.c
refspec.h
remote-curl.c
remote.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
remote.h Merge branch 'jt/clone-unborn-head' 2021-02-17 17:21:40 -08:00
replace-object.c
replace-object.h
repo-settings.c
repository.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
repository.h
rerere.c
rerere.h
reset.c
reset.h
resolve-undo.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
resolve-undo.h
revision.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
revision.h
run-command.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
run-command.h
send-pack.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
send-pack.h
sequencer.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
sequencer.h
serve.c
serve.h
server-info.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
setup.c
sh-i18n--envsubst.c
sha1dc_git.c
sha1dc_git.h
shallow.c
shallow.h
shell.c
shortlog.h
sideband.c
sideband.h
sigchain.c
sigchain.h
split-index.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
split-index.h
stable-qsort.c
strbuf.c
strbuf.h
streaming.c
streaming.h
string-list.c
string-list.h
strmap.c
strmap.h
strvec.c
strvec.h
sub-process.c
sub-process.h
submodule-config.c
submodule-config.h
submodule.c
submodule.h
symlinks.c
tag.c
tag.h
tar.h
tempfile.c
tempfile.h
thread-utils.c
thread-utils.h
tmp-objdir.c
tmp-objdir.h
trace.c
trace.h
trace2.c
trace2.h
trailer.c Merge branch 'rs/xcalloc-takes-nelem-first' 2021-03-19 15:25:39 -07:00
trailer.h
transport-helper.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
transport-internal.h
transport.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
transport.h
tree-diff.c
tree-walk.c
tree-walk.h
tree.c
tree.h
unicode-width.h
unimplemented.sh
unix-socket.c
unix-socket.h
unpack-trees.c Merge branch 'js/fsmonitor-unpack-fix' 2021-03-19 15:25:37 -07:00
unpack-trees.h
upload-pack.c Merge branch 'ak/corrected-commit-date' 2021-02-17 17:21:40 -08:00
upload-pack.h
url.c
url.h
urlmatch.c
urlmatch.h
usage.c
userdiff.c
userdiff.h
utf8.c
utf8.h
varint.c
varint.h
version.c
version.h
versioncmp.c
walker.c
walker.h
wildmatch.c
wildmatch.h
worktree.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
worktree.h
wrap-for-bin.sh
wrapper.c
write-or-die.c
ws.c
wt-status.c use CALLOC_ARRAY 2021-03-13 16:00:09 -08:00
wt-status.h
xdiff-interface.c
xdiff-interface.h
zlib.c

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). To subscribe to the list, send an email with just "subscribe git" in the body to majordomo@vger.kernel.org. The mailing list archives are available at https://lore.kernel.org/git/, http://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