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Patrick Steinhardt 0b4f8afef6 reftable/stack: accept insecure random bytes
The reftable library uses randomness in two call paths:

  - When reading a stack in case some of the referenced tables
    disappears. The randomness is used to delay the next read by a
    couple of milliseconds.

  - When writing a new table, where the randomness gets appended to the
    table name (e.g. "0x000000000001-0x000000000002-0b1d8ddf.ref").

In neither of these cases do we need strong randomness.

Unfortunately though, we have observed test failures caused by the
former case. In t0610 we have a test that spawns a 100 processes at
once, all of which try to write a new table to the stack. And given that
all of the processes will require randomness, it can happen that these
processes make the entropy pool run dry, which will then cause us to
die:

    + test_seq 100
    + printf %s commit\trefs/heads/branch-%s\n
    68d032e9edd3481ac96382786ececc37ec28709e 1
    + printf %s commit\trefs/heads/branch-%s\n
    68d032e9edd3481ac96382786ececc37ec28709e 2
    ...
    + git update-ref refs/heads/branch-98 HEAD
    + git update-ref refs/heads/branch-97 HEAD
    + git update-ref refs/heads/branch-99 HEAD
    + git update-ref refs/heads/branch-100 HEAD
    fatal: unable to get random bytes
    fatal: unable to get random bytes
    fatal: unable to get random bytes
    fatal: unable to get random bytes
    fatal: unable to get random bytes
    fatal: unable to get random bytes
    fatal: unable to get random bytes

The report was for NonStop, which uses OpenSSL as the backend for
randomness. In the preceding commit we have adapted that backend to also
return randomness in case the entropy pool is empty and the caller
passes the `CSPRNG_BYTES_INSECURE` flag. Do so to fix the issue.

Reported-by: Randall S. Becker <rsbecker@nexbridge.com>
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-01-07 09:04:18 -08:00
.github Merge branch 'ps/ci-meson' 2024-12-23 09:32:25 -08:00
bin-wrappers Introduce support for the Meson build system 2024-12-07 07:52:14 +09:00
block-sha1
builtin wrapper: allow generating insecure random bytes 2025-01-07 09:04:18 -08:00
ci Merge branch 'jk/lsan-race-ignore-false-positive' 2025-01-02 13:37:08 -08:00
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po gitk: Update Bulgarian translation (327t) 2024-12-24 11:58:09 +01:00
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reftable reftable/stack: accept insecure random bytes 2025-01-07 09:04:18 -08:00
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promisor-remote.c packfile: pass down repository to for_each_packed_object 2024-12-04 08:21:54 +09:00
promisor-remote.h
prompt.c
prompt.h
protocol-caps.c
protocol-caps.h
protocol.c
protocol.h
prune-packed.c packfile: pass down repository to has_object[_kept]_pack 2024-12-04 08:21:54 +09:00
prune-packed.h
pseudo-merge.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
pseudo-merge.h
quote.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
quote.h
range-diff.c Merge branch 'js/range-diff-diff-merges' 2024-12-23 09:32:17 -08:00
range-diff.h range-diff: optionally include merge commits' diffs in the analysis 2024-12-16 08:45:48 -08:00
reachable.c diff.h: fix index used to loop through unsigned integer 2024-12-06 20:20:03 +09:00
reachable.h
read-cache-ll.h global: Fix duplicate word typos 2024-10-21 16:05:04 -04:00
read-cache.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
read-cache.h
README.md
rebase-interactive.c
rebase-interactive.h
rebase.c
rebase.h
ref-filter.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
ref-filter.h
reflog-walk.c diff.h: fix index used to loop through unsigned integer 2024-12-06 20:20:03 +09:00
reflog-walk.h
reflog.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
reflog.h
refs.c Merge branch 'kn/reflog-migration' 2024-12-23 09:32:29 -08:00
refs.h Merge branch 'kn/reflog-migration' 2024-12-23 09:32:29 -08:00
refspec.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
refspec.h refspec: store raw refspecs inside refspec_item 2024-11-12 18:16:48 +09:00
RelNotes Prepare for 2.47.1 2024-11-20 14:43:30 +09:00
remote-curl.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
remote.c Merge branch 'sk/calloc-not-malloc-plus-memset' 2024-12-23 09:32:18 -08:00
remote.h fetch set_head: add warn-if-not-$branch option 2024-12-06 02:59:40 +09:00
replace-object.c
replace-object.h
repo-settings.c config: make packed_git_(limit|window_size) non-global variables 2024-12-04 08:21:55 +09:00
repo-settings.h config: make packed_git_(limit|window_size) non-global variables 2024-12-04 08:21:55 +09:00
repository.c worktree: add relativeWorktrees extension 2024-12-02 09:36:16 +09:00
repository.h worktree: add relativeWorktrees extension 2024-12-02 09:36:16 +09:00
rerere.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
rerere.h
reset.c
reset.h
resolve-undo.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
resolve-undo.h
revision.c Merge branch 'ps/build-sign-compare' 2024-12-23 09:32:11 -08:00
revision.h
run-command.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
run-command.h
sane-ctype.h
scalar.c scalar: address -Wsign-compare warnings 2024-12-06 20:20:05 +09:00
SECURITY.md
send-pack.c global: trivial conversions to fix -Wsign-compare warnings 2024-12-06 20:20:04 +09:00
send-pack.h
sequencer.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
sequencer.h
serve.c global: trivial conversions to fix -Wsign-compare warnings 2024-12-06 20:20:04 +09:00
serve.h
server-info.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
server-info.h
setup.c Merge branch 'ps/build-sign-compare' 2024-12-23 09:32:11 -08:00
setup.h worktree: add relativeWorktrees extension 2024-12-02 09:36:16 +09:00
sh-i18n--envsubst.c
sha1dc_git.c
sha1dc_git.h
shallow.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
shallow.h
shared.mak GIT-VERSION-GEN: fix overriding GIT_BUILT_FROM_COMMIT and GIT_DATE 2024-12-20 12:36:45 -08:00
shell.c
shortlog.h
sideband.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
sideband.h
sigchain.c
sigchain.h
simple-ipc.h simple-ipc: split async server initialization and running 2024-10-08 12:03:56 -07:00
sparse-index.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
sparse-index.h
split-index.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
split-index.h
stable-qsort.c
statinfo.c
statinfo.h
strbuf.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
strbuf.h refs: move ref name helpers around 2024-12-03 12:38:49 +09:00
streaming.c
streaming.h
string-list.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
string-list.h
strmap.c
strmap.h
strvec.c Merge branch 'ps/build-sign-compare' 2024-12-23 09:32:11 -08:00
strvec.h strvec: introduce new strvec_splice() function 2024-11-21 08:23:42 +09:00
sub-process.c
sub-process.h
submodule-config.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
submodule-config.h
submodule.c Merge branch 'sk/calloc-not-malloc-plus-memset' 2024-12-23 09:32:18 -08:00
submodule.h
symlinks.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
symlinks.h
tag.c Merge branch 'ps/build-sign-compare' 2024-12-23 09:32:11 -08:00
tag.h
tar.h
tempfile.c
tempfile.h
thread-utils.c
thread-utils.h Revert barrier-based LSan threading race workaround 2025-01-01 14:13:01 -08:00
tmp-objdir.c global: trivial conversions to fix -Wsign-compare warnings 2024-12-06 20:20:04 +09:00
tmp-objdir.h
trace2.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
trace2.h
trace.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
trace.h
trailer.c global: trivial conversions to fix -Wsign-compare warnings 2024-12-06 20:20:04 +09:00
trailer.h trailer: spread usage of "trailer_block" language 2024-10-14 12:33:02 -04:00
transport-helper.c global: trivial conversions to fix -Wsign-compare warnings 2024-12-06 20:20:04 +09:00
transport-internal.h
transport.c Merge branch 'ps/build-sign-compare' 2024-12-23 09:32:11 -08:00
transport.h transport: introduce parse_transport_option() method 2024-10-08 10:22:06 -07:00
tree-diff.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
tree-walk.c
tree-walk.h
tree.c
tree.h
unicode-width.h
unimplemented.sh Makefile: consistently use @PLACEHOLDER@ to substitute 2024-12-07 07:52:08 +09:00
unix-socket.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
unix-socket.h
unix-stream-server.c
unix-stream-server.h
unpack-trees.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
unpack-trees.h
upload-pack.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
upload-pack.h
url.c
url.h
urlmatch.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
urlmatch.h
usage.c global: trivial conversions to fix -Wsign-compare warnings 2024-12-06 20:20:04 +09:00
userdiff.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
userdiff.h
utf8.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
utf8.h
varint.c
varint.h
version-def.h.in Makefile: propagate Git version via generated header 2024-12-07 07:52:08 +09:00
version.c Merge branch 'ps/build-sign-compare' 2024-12-23 09:32:11 -08:00
version.h
versioncmp.c global: trivial conversions to fix -Wsign-compare warnings 2024-12-06 20:20:04 +09:00
versioncmp.h
walker.c refs: allow passing flags when setting up a transaction 2024-11-21 07:59:14 +09:00
walker.h http-walker: use object_id instead of bare hash 2024-10-25 17:35:46 -04:00
wildmatch.c
wildmatch.h
worktree.c Merge branch 'ps/build-sign-compare' 2024-12-23 09:32:11 -08:00
worktree.h worktree: add relative cli/config options to repair command 2024-12-02 09:36:17 +09:00
wrapper.c wrapper: allow generating insecure random bytes 2025-01-07 09:04:18 -08:00
wrapper.h wrapper: allow generating insecure random bytes 2025-01-07 09:04:18 -08:00
write-or-die.c
write-or-die.h
ws.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
ws.h
wt-status.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
wt-status.h
xdiff-interface.c global: mark code units that generate warnings with -Wsign-compare 2024-12-06 20:20:02 +09:00
xdiff-interface.h

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