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SZEDER Gábor f53c5de29c pickaxe: fix segfault with '-S<...> --pickaxe-regex' 
'git {log,diff,...} -S<...> --pickaxe-regex' can segfault as a result
of out-of-bounds memory reads.

diffcore-pickaxe.c:contains() looks for all matches of the given regex
in a buffer in a loop, advancing the buffer pointer to the end of the
last match in each iteration.  When we switched to REG_STARTEND in
b7d36ffca (regex: use regexec_buf(), 2016-09-21), we started passing
the size of that buffer to the regexp engine, too.  Unfortunately,
this buffer size is never updated on subsequent iterations, and as the
buffer pointer advances on each iteration, this "bufptr+bufsize"
points past the end of the buffer.  This results in segmentation
fault, if that memory can't be accessed.  In case of 'git log' it can
also result in erroneously listed commits, if the memory past the end
of buffer is accessible and happens to contain data matching the
regex.

Reduce the buffer size on each iteration as the buffer pointer is
advanced, thus maintaining the correct end of buffer location.
Furthermore, make sure that the buffer pointer is not dereferenced in
the control flow statements when we already reached the end of the
buffer.

The new test is flaky, I've never seen it fail on my Linux box even
without the fix, but this is expected according to db5dfa3 (regex:
-G<pattern> feeds a non NUL-terminated string to regexec() and fails,
2016-09-21).  However, it did fail on Travis CI with the first (and
incomplete) version of the fix, and based on that commit message I
would expect the new test without the fix to fail most of the time on
Windows.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2017-03-18 12:22:33 -07:00
block-sha1
builtin Merge branch 'ar/diff-args-osx-precompose' into maint 2016-06-06 14:27:35 -07:00
ci travis-ci: build documentation 2016-05-10 11:19:07 -07:00
compat Merge branch 'kb/msys2-tty' into maint 2016-06-06 14:27:38 -07:00
contrib git-multimail: update to release 1.3.0 2016-05-03 14:04:27 -07:00
Documentation Git 2.8.4 2016-06-06 14:29:32 -07:00
ewah
git-gui
gitk-git Merge branch 'master' of git://ozlabs.org/~paulus/gitk 2016-03-20 18:05:10 -07:00
gitweb Merge branch 'sk/gitweb-highlight-encoding' into HEAD 2016-05-18 14:40:10 -07:00
mergetools
perl typofix: assorted typofixes in comments, documentation and messages 2016-05-06 13:16:37 -07:00
po l10n-2.8.0-rnd3-fr 2016-04-25 13:36:26 -07:00
ppc
refs set_worktree_head_symref(): fix error message 2016-04-08 10:26:23 -07:00
t pickaxe: fix segfault with '-S<...> --pickaxe-regex' 2017-03-18 12:22:33 -07:00
templates
vcs-svn
xdiff Merge branch 'rj/xdiff-prepare-plug-leak-on-error-codepath' into maint 2016-04-14 18:57:46 -07:00
.gitattributes
.gitignore
.mailmap .mailmap: update to my shorter email address 2016-05-02 13:29:42 -07:00
.travis.yml Merge branch 'ls/travis-build-doc' into maint 2016-05-26 13:17:25 -07:00
abspath.c Windows: shorten code by re-using convert_slashes() 2016-04-04 18:03:02 -07:00
aclocal.m4
advice.c
advice.h
alias.c
alloc.c
archive-tar.c archive-tar: convert snprintf to xsnprintf 2016-05-26 10:44:26 -07:00
archive-zip.c
archive.c
archive.h
argv-array.c
argv-array.h
attr.c Merge branch 'ss/exc-flag-is-a-collection-of-bits' into maint 2016-04-14 18:37:15 -07:00
attr.h
base85.c
bisect.c
bisect.h
blob.c
blob.h
branch.c branch -m: update all per-worktree HEADs 2016-04-04 12:57:22 -07:00
branch.h branch -m: update all per-worktree HEADs 2016-04-04 12:57:22 -07:00
builtin.h
bulk-checkin.c
bulk-checkin.h
bundle.c bundle: don't leak an fd in case of early return 2016-04-01 10:33:18 -07:00
bundle.h
cache-tree.c
cache-tree.h
cache.h Merge branch 'js/windows-dotgit' into maint 2016-05-26 13:17:23 -07:00
check-builtins.sh
check-racy.c
check_bindir
color.c
color.h
column.c
column.h
combine-diff.c
command-list.txt
commit-slab.h
commit.c
commit.h
config.c Merge branch 'tb/core-eol-fix' into maint 2016-06-06 14:27:36 -07:00
config.mak.in
config.mak.uname mingw: make isatty() recognize MSYS2's pseudo terminals (/dev/pty*) 2016-05-26 13:12:02 -07:00
configure.ac configure.ac: improve description of NO_REGEX test 2016-10-10 16:15:15 -07:00
connect.c
connect.h
connected.c
connected.h
convert.c convert.c: ident + core.autocrlf didn't work 2016-04-25 12:12:03 -07:00
convert.h
copy.c
COPYING
credential-cache--daemon.c Merge branch 'jk/credential-cache-comment-exit' into maint 2016-04-14 18:37:16 -07:00
credential-cache.c credential-cache, send_request: close fd when done 2016-04-01 10:33:18 -07:00
credential-store.c
credential.c
credential.h
csum-file.c
csum-file.h
ctype.c
daemon.c
date.c
decorate.c
decorate.h
delta.h
diff-delta.c
diff-lib.c
diff-no-index.c
diff.c regex: use regexec_buf() 2016-09-21 13:56:15 -07:00
diff.h
diffcore-break.c
diffcore-delta.c
diffcore-order.c
diffcore-pickaxe.c pickaxe: fix segfault with '-S<...> --pickaxe-regex' 2017-03-18 12:22:33 -07:00
diffcore-rename.c Merge branch 'sg/diff-multiple-identical-renames' into maint 2016-04-29 14:15:55 -07:00
diffcore.h
dir.c dir.c: remove dead function fnmatch_icase() 2016-04-22 14:07:45 -07:00
dir.h dir.c: remove dead function fnmatch_icase() 2016-04-22 14:07:45 -07:00
editor.c
entry.c
environment.c Merge branch 'js/windows-dotgit' into maint 2016-05-26 13:17:23 -07:00
exec_cmd.c
exec_cmd.h
fast-import.c
fetch-pack.c fetch-pack: isolate sigpipe in demuxer thread 2016-04-20 13:33:56 -07:00
fetch-pack.h
fmt-merge-msg.h
fsck.c fsck: detect and warn a commit with embedded NUL 2016-05-10 10:02:06 -07:00
fsck.h
generate-cmdlist.sh
gettext.c
gettext.h
git-add--interactive.perl
git-archimport.perl
git-bisect.sh
git-compat-util.h regex: add regexec_buf() that can work on a non NUL-terminated string 2016-09-21 13:56:15 -07:00
git-cvsexportcommit.perl
git-cvsimport.perl
git-cvsserver.perl typofix: assorted typofixes in comments, documentation and messages 2016-05-06 13:16:37 -07:00
git-difftool--helper.sh difftool/mergetool: make the form of yes/no questions consistent 2016-04-25 15:15:17 -07:00
git-difftool.perl difftool: handle unmerged files in dir-diff mode 2016-05-16 14:53:05 -07:00
git-filter-branch.sh
git-instaweb.sh
git-merge-octopus.sh
git-merge-one-file.sh
git-merge-resolve.sh
git-mergetool--lib.sh difftool/mergetool: make the form of yes/no questions consistent 2016-04-25 15:15:17 -07:00
git-mergetool.sh Merge branch 'nf/mergetool-prompt' into HEAD 2016-05-18 14:40:07 -07:00
git-p4.py git-p4: fix Git LFS pointer parsing 2016-04-28 10:03:13 -07:00
git-parse-remote.sh i18n: git-parse-remote.sh: mark strings for translation 2016-04-19 12:07:49 -07:00
git-quiltimport.sh
git-rebase--am.sh
git-rebase--interactive.sh rebase--interactive: avoid empty list in shell for-loop 2016-05-10 14:11:27 -07:00
git-rebase--merge.sh
git-rebase.sh
git-relink.perl
git-remote-testgit.sh
git-request-pull.sh
git-send-email.perl Merge branch 'jd/send-email-to-whom' into HEAD 2016-05-18 14:40:07 -07:00
git-sh-i18n.sh
git-sh-setup.sh
git-stash.sh
git-submodule.sh Merge branch 'sb/submodule-deinit-all' into maint 2016-05-31 14:09:46 -07:00
git-svn.perl
GIT-VERSION-GEN Git 2.8.4 2016-06-06 14:29:32 -07:00
git-web--browse.sh
git.c
git.rc
git.spec.in git.spec.in: use README.md, not README 2016-04-03 10:12:48 -07:00
gpg-interface.c
gpg-interface.h
graph.c
graph.h
grep.c regex: use regexec_buf() 2016-09-21 13:56:15 -07:00
grep.h
hashmap.c
hashmap.h
help.c
help.h
hex.c
http-backend.c
http-fetch.c
http-push.c
http-walker.c
http.c Merge branch 'bn/http-cookiefile-config' into maint 2016-05-31 14:08:28 -07:00
http.h
ident.c Merge branch 'da/user-useconfigonly' into HEAD 2016-05-18 14:40:05 -07:00
imap-send.c Merge branch 'ky/imap-send-openssl-1.1.0' into maint 2016-05-06 14:53:24 -07:00
INSTALL
khash.h
kwset.c
kwset.h
levenshtein.c
levenshtein.h
LGPL-2.1
line-log.c
line-log.h
line-range.c
line-range.h
list-objects.c
list-objects.h
ll-merge.c
ll-merge.h
lockfile.c
lockfile.h
log-tree.c
log-tree.h
mailinfo.c
mailinfo.h
mailmap.c
mailmap.h
Makefile regex: add regexec_buf() that can work on a non NUL-terminated string 2016-09-21 13:56:15 -07:00
match-trees.c
merge-blobs.c
merge-blobs.h
merge-recursive.c
merge-recursive.h
merge.c
mergesort.c
mergesort.h
name-hash.c
notes-cache.c
notes-cache.h
notes-merge.c
notes-merge.h
notes-utils.c
notes-utils.h
notes.c
notes.h
object.c
object.h
pack-bitmap-write.c
pack-bitmap.c
pack-bitmap.h
pack-check.c
pack-objects.c
pack-objects.h
pack-revindex.c
pack-revindex.h
pack-write.c
pack.h
pager.c
parse-options-cb.c
parse-options.c
parse-options.h
patch-delta.c
patch-ids.c
patch-ids.h
path.c Merge branch 'lp/typofixes' into maint 2016-05-26 13:17:21 -07:00
pathspec.c
pathspec.h
pkt-line.c
pkt-line.h
preload-index.c
pretty.c
prio-queue.c
prio-queue.h
progress.c
progress.h
prompt.c
prompt.h
quote.c
quote.h
reachable.c
reachable.h
read-cache.c
README.md
ref-filter.c
ref-filter.h
reflog-walk.c
reflog-walk.h
refs.c
refs.h refs: add a new function set_worktree_head_symref 2016-04-04 12:57:21 -07:00
RelNotes Git 2.8.4 2016-06-06 14:29:32 -07:00
remote-curl.c
remote-testsvn.c
remote.c Merge branch 'nd/remote-plural-ours-plus-theirs' into maint 2016-05-26 13:17:18 -07:00
remote.h
replace_object.c
rerere.c
rerere.h
resolve-undo.c
resolve-undo.h
revision.c
revision.h
run-command.c Merge branch 'jk/push-client-deadlock-fix' into HEAD 2016-05-18 14:40:06 -07:00
run-command.h Merge branch 'jk/push-client-deadlock-fix' into HEAD 2016-05-18 14:40:06 -07:00
send-pack.c send-pack: isolate sigpipe in demuxer thread 2016-04-20 13:33:53 -07:00
send-pack.h
sequencer.c
sequencer.h
server-info.c
setup.c Merge branch 'jc/xstrfmt-null-with-prec-0' into maint 2016-05-02 14:24:14 -07:00
sh-i18n--envsubst.c
sha1-array.c
sha1-array.h
sha1-lookup.c
sha1-lookup.h
sha1_file.c
sha1_name.c
shallow.c
shell.c
shortlog.h
show-index.c
sideband.c
sideband.h
sigchain.c
sigchain.h
split-index.c typofix: assorted typofixes in comments, documentation and messages 2016-05-06 13:16:37 -07:00
split-index.h
strbuf.c Merge branch 'jk/getwholeline-getdelim-empty' into maint 2016-04-14 18:57:46 -07:00
strbuf.h
streaming.c
streaming.h
string-list.c string_list: use string-list API in unsorted_string_list_lookup() 2016-04-25 11:48:27 -07:00
string-list.h
submodule-config.c Merge branch 'sb/misc-cleanups' into HEAD 2016-05-18 14:40:15 -07:00
submodule-config.h
submodule.c
submodule.h
symlinks.c
tag.c
tag.h
tar.h
tempfile.c
tempfile.h
test-chmtime.c
test-config.c
test-ctype.c
test-date.c
test-delta.c
test-dump-cache-tree.c
test-dump-split-index.c
test-dump-untracked-cache.c
test-fake-ssh.c
test-genrandom.c
test-hashmap.c
test-index-version.c
test-line-buffer.c
test-match-trees.c
test-mergesort.c
test-mktemp.c
test-parse-options.c
test-path-utils.c
test-prio-queue.c
test-read-cache.c
test-regex.c
test-revision-walking.c
test-run-command.c
test-scrap-cache-tree.c
test-sha1-array.c
test-sha1.c
test-sha1.sh
test-sigchain.c
test-string-list.c
test-submodule-config.c
test-subprocess.c
test-svn-fe.c
test-urlmatch-normalization.c
test-wildmatch.c
thread-utils.c
thread-utils.h
trace.c
trace.h
trailer.c
trailer.h
transport-helper.c typofix: assorted typofixes in comments, documentation and messages 2016-05-06 13:16:37 -07:00
transport.c
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 i18n: unpack-trees: avoid substituting only a verb in sentences 2016-05-12 16:28:43 -07:00
unpack-trees.h
update_unicode.sh
upload-pack.c
url.c
url.h
urlmatch.c
urlmatch.h
usage.c
userdiff.c
userdiff.h
utf8.c
utf8.h typofix: assorted typofixes in comments, documentation and messages 2016-05-06 13:16:37 -07:00
varint.c
varint.h
version.c
version.h
versioncmp.c
walker.c
walker.h
wildmatch.c typofix: assorted typofixes in comments, documentation and messages 2016-05-06 13:16:37 -07:00
wildmatch.h
worktree.c typofix: assorted typofixes in comments, documentation and messages 2016-05-06 13:16:37 -07:00
worktree.h
wrap-for-bin.sh
wrapper.c wrapper.c: delete dead function git_mkstemps() 2016-04-22 14:07:55 -07:00
write_or_die.c
ws.c
wt-status.c Merge branch 'sb/misc-cleanups' into HEAD 2016-05-18 14:40:15 -07:00
wt-status.h
xdiff-interface.c regex: use regexec_buf() 2016-09-21 13:56:15 -07:00
xdiff-interface.h
zlib.c

README.md

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 http://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 http://news.gmane.org/gmane.comp.version-control.git/, http://marc.info/?l=git and other archival sites.

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