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Taylor Blau 03c7a30cee pack-bitmap: reject pseudo-merge "sampleRate" of 0 The "bitmapPseudoMerge.*.sampleRate" configuration controls what fraction of unstable commits are included in each pseudo-merge group. The config validation accepts values in the range `[0, 1]`, but a value of exactly 0 causes a division by zero in `select_pseudo_merges_1()`: if (j % (uint32_t)(1.0 / group->sample_rate)) When `sample_rate` is 0, `1.0 / 0.0` produces `+inf`, and casting infinity to `uint32_t` is undefined behavior in C. On most platforms this yields 0, making the subsequent modulo operation (`j % 0`) a fatal arithmetic trap. This path was not previously reachable because an earlier bug caused all pseudo-merge candidates to be classified as "stable" (where the sampling rate is not used), regardless of their actual commit date. Now that the date classification is fixed, the unstable path is exercised and the division by zero can fire. Fix this by changing the validation to require a strict lower bound and thus reject 0. Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>		2026-05-12 10:36:18 +09:00
.github	…
Documentation	pack-bitmap: reject pseudo-merge "sampleRate" of 0	2026-05-12 10:36:18 +09:00
bin-wrappers	…
block-sha1	…
builtin	Merge branch 'ds/rev-list-maximal-only-optim'	2026-04-09 11:21:59 -07:00
ci	Merge branch 'ps/build-tweaks'	2026-03-27 11:00:01 -07:00
compat	Revert "compat/posix: introduce writev(3p) wrapper"	2026-04-09 14:48:24 -07:00
compiler-tricks	…
contrib	Revert "cmake: use writev(3p) wrapper as needed"	2026-04-09 14:47:28 -07:00
ewah	…
git-gui	…
gitk-git	…
gitweb	…
mergetools	…
negotiator	…
odb	odb: use enum for `odb_write_object` flags	2026-03-31 20:43:13 -07:00
oss-fuzz	…
perl	…
po	…
refs	Merge branch 'jk/c23-const-preserving-fixes-more'	2026-04-09 11:21:59 -07:00
reftable	reftable/system: add abstraction to mmap files	2026-04-02 10:45:44 -07:00
sha1	…
sha1collisiondetection@855827c583	…
sha1dc	…
sha256	…
src	…
subprojects	…
t	pack-bitmap: reject pseudo-merge "sampleRate" of 0	2026-05-12 10:36:18 +09:00
templates	…
tools	Merge branch 'rs/use-strvec-pushv'	2026-04-01 10:28:19 -07:00
trace2	…
xdiff	…
.cirrus.yml	…
.clang-format	…
.editorconfig	…
.gitattributes	…
.gitignore	…
.gitlab-ci.yml	…
.gitmodules	…
.mailmap	…
.tsan-suppressions	…
CODE_OF_CONDUCT.md	…
COPYING	…
Cargo.toml	…
GIT-BUILD-OPTIONS.in	…
GIT-VERSION-FILE.in	…
GIT-VERSION-GEN	Git 2.54-rc1	2026-04-08 08:21:34 -07:00
INSTALL	…
LGPL-2.1	…
Makefile	Revert "compat/posix: introduce writev(3p) wrapper"	2026-04-09 14:48:24 -07:00
README.md	…
RelNotes	…
SECURITY.md	…
abspath.c	…
abspath.h	…
aclocal.m4	…
add-interactive.c	…
add-interactive.h	…
add-patch.c	Merge branch 'sp/add-patch-with-fewer-the-repository'	2026-04-07 14:59:26 -07:00
add-patch.h	…
advice.c	…
advice.h	…
alias.c	…
alias.h	…
alloc.c	…
alloc.h	…
apply.c	Merge branch 'jc/whitespace-incomplete-line'	2026-04-07 14:59:26 -07:00
apply.h	…
archive-tar.c	…
archive-zip.c	…
archive.c	…
archive.h	…
attr.c	…
attr.h	…
banned.h	…
base85.c	…
base85.h	…
bisect.c	…
bisect.h	…
blame.c	…
blame.h	…
blob.c	…
blob.h	…
bloom.c	…
bloom.h	…
branch.c	…
branch.h	…
build.rs	…
builtin.h	…
bundle-uri.c	…
bundle-uri.h	…
bundle.c	…
bundle.h	…
cache-tree.c	Merge branch 'jd/cache-tree-trace-wo-the-repository'	2026-04-08 10:19:17 -07:00
cache-tree.h	…
cbtree.c	…
cbtree.h	…
chdir-notify.c	…
chdir-notify.h	…
checkout.c	…
checkout.h	…
chunk-format.c	…
chunk-format.h	…
color.c	…
color.h	…
column.c	…
column.h	…
combine-diff.c	…
command-list.txt	…
commit-graph.c	Merge branch 'ps/commit-graph-overflow-fix'	2026-04-07 14:59:25 -07:00
commit-graph.h	…
commit-reach.c	…
commit-reach.h	…
commit-slab-decl.h	…
commit-slab-impl.h	…
commit-slab.h	…
commit.c	…
commit.h	…
common-exit.c	…
common-init.c	…
common-init.h	…
common-main.c	…
config.c	…
config.h	…
config.mak.dev	…
config.mak.in	…
config.mak.uname	Revert "compat/posix: introduce writev(3p) wrapper"	2026-04-09 14:48:24 -07:00
configure.ac	…
connect.c	…
connect.h	…
connected.c	…
connected.h	…
convert.c	convert: add const to fix strchr() warnings	2026-04-01 22:08:50 -07:00
convert.h	…
copy.c	…
copy.h	…
credential.c	…
credential.h	…
csum-file.c	…
csum-file.h	…
ctype.c	…
daemon.c	…
date.c	…
date.h	…
decorate.c	…
decorate.h	…
delta-islands.c	…
delta-islands.h	…
delta.h	…
diagnose.c	…
diagnose.h	…
diff-delta.c	…
diff-lib.c	…
diff-merges.c	…
diff-merges.h	…
diff-no-index.c	…
diff.c	Merge branch 'mm/line-log-use-standard-diff-output'	2026-04-07 14:59:27 -07:00
diff.h	…
diffcore-break.c	…
diffcore-delta.c	…
diffcore-order.c	…
diffcore-pickaxe.c	…
diffcore-rename.c	…
diffcore-rotate.c	…
diffcore.h	…
dir-iterator.c	…
dir-iterator.h	…
dir.c	…
dir.h	…
editor.c	…
editor.h	…
entry.c	…
entry.h	…
environment.c	…
environment.h	…
exec-cmd.c	…
exec-cmd.h	…
fetch-negotiator.c	…
fetch-negotiator.h	…
fetch-pack.c	Merge branch 'ps/odb-cleanup'	2026-04-08 10:19:17 -07:00
fetch-pack.h	…
fmt-merge-msg.c	…
fmt-merge-msg.h	…
for-each-ref.h	…
fsck.c	…
fsck.h	…
fsmonitor--daemon.h	…
fsmonitor-ipc.c	…
fsmonitor-ipc.h	…
fsmonitor-ll.h	…
fsmonitor-path-utils.h	…
fsmonitor-settings.c	…
fsmonitor-settings.h	…
fsmonitor.c	…
fsmonitor.h	…
gettext.c	…
gettext.h	…
git-archimport.perl	…
git-compat-util.h	git-compat-util: fix CONST_OUTPARAM typo and indentation	2026-04-06 08:22:57 -07:00
git-curl-compat.h	…
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	…
git-mergetool.sh	…
git-p4.py	…
git-quiltimport.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-zlib.c	…
git-zlib.h	…
git.c	…
git.rc.in	…
gpg-interface.c	fast-import: add 'abort-if-invalid' mode to '--signed-commits=<mode>'	2026-03-26 12:42:57 -07:00
gpg-interface.h	fast-import: add 'abort-if-invalid' mode to '--signed-commits=<mode>'	2026-03-26 12:42:57 -07:00
graph.c	…
graph.h	…
grep.c	…
grep.h	…
hash-lookup.c	…
hash-lookup.h	…
hash.c	…
hash.h	…
hashmap.c	…
hashmap.h	…
help.c	…
help.h	…
hex-ll.c	…
hex-ll.h	…
hex.c	refs/files-backend: drop const to fix strchr() warning	2026-04-01 22:08:53 -07:00
hex.h	refs/files-backend: drop const to fix strchr() warning	2026-04-01 22:08:53 -07:00
hook.c	hook: show disabled hooks in "git hook list"	2026-03-25 14:00:47 -07:00
hook.h	hook: show disabled hooks in "git hook list"	2026-03-25 14:00:47 -07:00
http-backend.c	…
http-fetch.c	…
http-push.c	Merge branch 'jk/c23-const-preserving-fixes-more'	2026-04-09 11:21:59 -07:00
http-walker.c	odb: rename `odb_has_object()` flags	2026-03-31 20:43:14 -07:00
http.c	Merge branch 'jk/c23-const-preserving-fixes-more'	2026-04-09 11:21:59 -07:00
http.h	…
ident.c	…
ident.h	…
imap-send.c	…
iterator.h	…
json-writer.c	…
json-writer.h	…
khash.h	…
kwset.c	…
kwset.h	…
levenshtein.c	…
levenshtein.h	…
line-log.c	…
line-log.h	…
line-range.c	…
line-range.h	…
linear-assignment.c	…
linear-assignment.h	…
list-objects-filter-options.c	…
list-objects-filter-options.h	…
list-objects-filter.c	…
list-objects-filter.h	…
list-objects.c	odb: rename `odb_has_object()` flags	2026-03-31 20:43:14 -07:00
list-objects.h	…
list.h	…
lockfile.c	…
lockfile.h	…
log-tree.c	…
log-tree.h	…
loose.c	…
loose.h	…
ls-refs.c	…
ls-refs.h	…
mailinfo.c	Merge branch 'vp/http-rate-limit-retries'	2026-04-01 10:28:18 -07:00
mailinfo.h	…
mailmap.c	…
mailmap.h	…
match-trees.c	…
match-trees.h	…
mem-pool.c	…
mem-pool.h	…
merge-blobs.c	…
merge-blobs.h	…
merge-ll.c	…
merge-ll.h	…
merge-ort-wrappers.c	…
merge-ort-wrappers.h	…
merge-ort.c	…
merge-ort.h	…
merge.c	…
merge.h	…
mergesort.h	…
meson.build	Revert "compat/posix: introduce writev(3p) wrapper"	2026-04-09 14:48:24 -07:00
meson_options.txt	…
midx-write.c	…
midx.c	…
midx.h	…
name-hash.c	…
name-hash.h	…
notes-cache.c	…
notes-cache.h	…
notes-merge.c	…
notes-merge.h	…
notes-utils.c	…
notes-utils.h	…
notes.c	odb: rename `odb_has_object()` flags	2026-03-31 20:43:14 -07:00
notes.h	…
object-file-convert.c	…
object-file-convert.h	…
object-file.c	Merge branch 'jt/index-fd-wo-repo-regression-fix-maint'	2026-04-08 10:20:51 -07:00
object-file.h	odb: use enum for `odb_write_object` flags	2026-03-31 20:43:13 -07:00
object-name.c	Merge branch 'ps/odb-generic-object-name-handling'	2026-04-06 15:42:49 -07:00
object-name.h	…
object.c	…
object.h	…
odb.c	odb: rename `odb_has_object()` flags	2026-03-31 20:43:14 -07:00
odb.h	odb: drop unneeded headers and forward decls	2026-03-31 20:43:14 -07:00
oid-array.c	…
oid-array.h	…
oidmap.c	…
oidmap.h	…
oidset.c	…
oidset.h	…
oidtree.c	…
oidtree.h	…
pack-bitmap-write.c	pack-bitmap: fix pseudo-merge lookup for shared commits	2026-05-12 10:36:18 +09:00
pack-bitmap.c	…
pack-bitmap.h	…
pack-check.c	…
pack-mtimes.c	…
pack-mtimes.h	…
pack-objects.c	…
pack-objects.h	…
pack-refs.c	…
pack-refs.h	…
pack-revindex.c	…
pack-revindex.h	…
pack-write.c	…
pack.h	…
packfile.c	Merge branch 'ps/odb-cleanup'	2026-04-08 10:19:17 -07:00
packfile.h	Merge branch 'ps/odb-cleanup'	2026-04-08 10:19:17 -07:00
pager.c	pager: explicitly cast away strchr() constness	2026-04-01 22:08:51 -07:00
pager.h	…
parallel-checkout.c	…
parallel-checkout.h	…
parse-options-cb.c	…
parse-options.c	…
parse-options.h	…
parse.c	…
parse.h	…
patch-delta.c	…
patch-ids.c	…
patch-ids.h	…
path-walk.c	Merge branch 'yc/path-walk-fix-error-reporting'	2026-04-07 14:59:26 -07:00
path-walk.h	…
path.c	backfill: work with prefix pathspecs	2026-03-26 09:38:06 -07:00
path.h	backfill: work with prefix pathspecs	2026-03-26 09:38:06 -07:00
pathspec.c	…
pathspec.h	…
pkt-line.c	…
pkt-line.h	pkt-line: make packet_reader.line non-const	2026-04-01 22:08:52 -07:00
preload-index.c	…
preload-index.h	…
pretty.c	Merge branch 'mf/format-patch-cover-letter-format'	2026-04-03 13:01:08 -07:00
pretty.h	…
prio-queue.c	…
prio-queue.h	…
progress.c	…
progress.h	…
promisor-remote.c	…
promisor-remote.h	…
prompt.c	…
prompt.h	…
protocol-caps.c	…
protocol-caps.h	…
protocol.c	…
protocol.h	…
prune-packed.c	…
prune-packed.h	…
pseudo-merge.c	pack-bitmap: reject pseudo-merge "sampleRate" of 0	2026-05-12 10:36:18 +09:00
pseudo-merge.h	…
quote.c	…
quote.h	…
range-diff.c	range-diff: drop const to fix strstr() warnings	2026-04-01 22:08:53 -07:00
range-diff.h	…
reachable.c	…
reachable.h	…
read-cache-ll.h	…
read-cache.c	Merge branch 'ng/add-files-to-cache-wo-rename'	2026-04-08 10:19:18 -07:00
read-cache.h	…
rebase-interactive.c	…
rebase-interactive.h	…
rebase.c	…
rebase.h	…
ref-filter.c	…
ref-filter.h	…
reflog-walk.c	…
reflog-walk.h	…
reflog.c	odb: rename `odb_has_object()` flags	2026-03-31 20:43:14 -07:00
reflog.h	…
refs.c	Merge branch 'ps/odb-cleanup'	2026-04-08 10:19:17 -07:00
refs.h	…
refspec.c	…
refspec.h	…
remote-curl.c	Merge branch 'kj/refspec-parsing-outside-repository'	2026-04-01 10:28:19 -07:00
remote.c	odb: rename `odb_has_object()` flags	2026-03-31 20:43:14 -07:00
remote.h	…
repack-cruft.c	…
repack-filtered.c	…
repack-geometry.c	…
repack-midx.c	…
repack-promisor.c	…
repack.c	…
repack.h	…
replace-object.c	…
replace-object.h	…
replay.c	Merge branch 'tc/replay-ref'	2026-04-08 10:19:18 -07:00
replay.h	replay: allow to specify a ref with option --ref	2026-04-01 21:34:25 -07:00
repo-settings.c	…
repo-settings.h	…
repository.c	…
repository.h	…
rerere.c	Merge branch 'jc/rerere-modern-strbuf-handling'	2026-03-27 11:00:03 -07:00
rerere.h	…
reset.c	…
reset.h	…
resolve-undo.c	…
resolve-undo.h	…
revision.c	Merge branch 'mm/line-log-use-standard-diff-output'	2026-04-07 14:59:27 -07:00
revision.h	revision: include object-name.h	2026-03-26 09:38:06 -07:00
run-command.c	Merge branch 'jk/c23-const-preserving-fixes-more'	2026-04-09 11:21:59 -07:00
run-command.h	…
sane-ctype.h	…
scalar.c	…
send-pack.c	pkt-line: make packet_reader.line non-const	2026-04-01 22:08:52 -07:00
send-pack.h	…
sequencer.c	Merge branch 'sa/replay-revert'	2026-04-03 13:01:09 -07:00
sequencer.h	Merge branch 'sa/replay-revert'	2026-04-03 13:01:09 -07:00
serve.c	…
serve.h	…
server-info.c	…
server-info.h	…
setup.c	…
setup.h	…
sh-i18n--envsubst.c	…
sha1dc_git.c	…
sha1dc_git.h	…
shallow.c	odb: rename `odb_has_object()` flags	2026-03-31 20:43:14 -07:00
shallow.h	…
shared.mak	…
shell.c	…
shortlog.h	…
sideband.c	Revert "sideband: use writev(3p) to send pktlines"	2026-04-09 14:47:51 -07:00
sideband.h	…
sigchain.c	…
sigchain.h	…
simple-ipc.h	…
sparse-index.c	…
sparse-index.h	…
split-index.c	…
split-index.h	…
stable-qsort.c	…
statinfo.c	…
statinfo.h	…
strbuf.c	Merge branch 'vp/http-rate-limit-retries'	2026-04-01 10:28:18 -07:00
strbuf.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	Merge branch 'rs/use-strvec-pushv'	2026-04-01 10:28:19 -07:00
submodule.h	…
symlinks.c	…
symlinks.h	…
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 'vp/http-rate-limit-retries'	2026-04-01 10:28:18 -07:00
trailer.h	…
transport-helper.c	Merge branch 'jk/c23-const-preserving-fixes-more'	2026-04-09 11:21:59 -07:00
transport-internal.h	…
transport.c	Merge branch 'ar/config-hook-cleanups'	2026-04-03 13:01:09 -07:00
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	…
unix-stream-server.c	…
unix-stream-server.h	…
unpack-trees.c	…
unpack-trees.h	…
upload-pack.c	…
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-def.h.in	…
version.c	…
version.h	…
versioncmp.c	…
versioncmp.h	…
walker.c	odb: rename `odb_has_object()` flags	2026-03-31 20:43:14 -07:00
walker.h	…
wildmatch.c	…
wildmatch.h	…
worktree.c	Merge branch 'pw/worktree-reduce-the-repository'	2026-04-03 13:01:09 -07:00
worktree.h	Merge branch 'pw/worktree-reduce-the-repository'	2026-04-03 13:01:09 -07:00
wrapper.c	Revert "wrapper: introduce writev(3p) wrappers"	2026-04-09 14:48:09 -07:00
wrapper.h	Revert "wrapper: introduce writev(3p) wrappers"	2026-04-09 14:48:09 -07:00
write-or-die.c	Revert "wrapper: introduce writev(3p) wrappers"	2026-04-09 14:48:09 -07:00
write-or-die.h	Revert "wrapper: introduce writev(3p) wrappers"	2026-04-09 14:48:09 -07:00
ws.c	…
ws.h	…
wt-status.c	…
wt-status.h	…
xdiff-interface.c	…
xdiff-interface.h	…

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 https://git-scm.com/ including full documentation and Git related tools.

See Documentation/gittutorial.adoc to get started, then see Documentation/giteveryday.adoc for a useful minimum set of commands, and Documentation/git-<commandname>.adoc 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.adoc (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