From: Patrick Steinhardt <ps@pks.im>
To: git@vger.kernel.org
Cc: Junio C Hamano <gitster@pobox.com>,
"brian m. carlson" <sandals@crustytoothpaste.net>,
Justin Tobler <jltobler@gmail.com>
Subject: [PATCH v3 13/13] repository: stop setting SHA1 as the default object hash
Date: Mon, 29 Apr 2024 08:35:11 +0200 [thread overview]
Message-ID: <95909c2da57f6d9814561c94d75be4582195bb5f.1714371422.git.ps@pks.im> (raw)
In-Reply-To: <cover.1714371422.git.ps@pks.im>
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During the startup of Git, we call `initialize_the_repository()` to set
up `the_repository` as well as `the_index`. Part of this setup is also
to set the default object hash of the repository to SHA1. This has the
effect that `the_hash_algo` is getting initialized to SHA1, as well.
This default hash algorithm eventually gets overridden by most Git
commands via `setup_git_directory()`, which also detects the actual hash
algorithm used by the repository.
There are some commands though that don't access a repository at all, or
at a later point only, and thus retain the default hash function for
some amount of time. As some of the the preceding commits demonstrate,
this can lead to subtle issues when we access `the_hash_algo` when no
repository has been set up.
Address this issue by dropping the set up of the default hash algorithm
completely. The effect of this is that `the_hash_algo` will map to a
`NULL` pointer and thus cause Git to crash when something tries to
access the hash algorithm without it being properly initialized. It thus
forces all Git commands to explicitly set up the hash algorithm in case
there is no repository.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
---
repository.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/repository.c b/repository.c
index e15b416944..b65b1a8c8b 100644
--- a/repository.c
+++ b/repository.c
@@ -35,8 +35,6 @@ void initialize_the_repository(void)
the_repo.parsed_objects = parsed_object_pool_new();
index_state_init(&the_index, the_repository);
-
- repo_set_hash_algo(&the_repo, GIT_HASH_SHA1);
}
static void expand_base_dir(char **out, const char *in,
--
2.45.0-rc1
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next prev parent reply other threads:[~2024-04-29 6:35 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-19 9:51 [PATCH 00/11] Stop relying on SHA1 fallback for `the_hash_algo` Patrick Steinhardt
2024-04-19 9:51 ` [PATCH 01/11] path: harden validation of HEAD with non-standard hashes Patrick Steinhardt
2024-04-19 19:03 ` brian m. carlson
2024-04-22 4:56 ` Patrick Steinhardt
2024-04-22 16:15 ` Junio C Hamano
2024-04-23 4:50 ` Patrick Steinhardt
2024-04-23 16:54 ` Junio C Hamano
2024-04-19 9:51 ` [PATCH 02/11] parse-options-cb: only abbreviate hashes when hash algo is known Patrick Steinhardt
2024-04-23 0:30 ` Justin Tobler
2024-04-19 9:51 ` [PATCH 03/11] attr: don't recompute default attribute source Patrick Steinhardt
2024-04-23 0:32 ` Justin Tobler
2024-04-19 9:51 ` [PATCH 04/11] attr: fix BUG() when parsing attrs outside of repo Patrick Steinhardt
2024-04-19 9:51 ` [PATCH 05/11] remote-curl: fix parsing of detached SHA256 heads Patrick Steinhardt
2024-04-19 9:51 ` [PATCH 06/11] builtin/rev-parse: allow shortening to more than 40 hex characters Patrick Steinhardt
2024-04-19 9:51 ` [PATCH 07/11] builtin/blame: don't access potentially unitialized `the_hash_algo` Patrick Steinhardt
2024-04-19 9:51 ` [PATCH 08/11] builtin/bundle: abort "verify" early when there is no repository Patrick Steinhardt
2024-04-19 9:51 ` [PATCH 09/11] builtin/diff: explicitly set hash algo when there is no repo Patrick Steinhardt
2024-04-22 18:41 ` Junio C Hamano
2024-04-19 9:51 ` [PATCH 10/11] builtin/shortlog: don't set up revisions without repo Patrick Steinhardt
2024-04-23 0:35 ` Justin Tobler
2024-04-19 9:51 ` [PATCH 11/11] repository: stop setting SHA1 as the default object hash Patrick Steinhardt
2024-04-19 19:12 ` [PATCH 00/11] Stop relying on SHA1 fallback for `the_hash_algo` brian m. carlson
2024-04-19 19:16 ` Junio C Hamano
2024-04-22 4:56 ` Patrick Steinhardt
2024-04-23 5:07 ` [PATCH v2 00/12] " Patrick Steinhardt
2024-04-23 5:07 ` [PATCH v2 01/12] path: harden validation of HEAD with non-standard hashes Patrick Steinhardt
2024-04-23 5:07 ` [PATCH v2 02/12] path: move `validate_headref()` to its only user Patrick Steinhardt
2024-04-23 5:07 ` [PATCH v2 03/12] parse-options-cb: only abbreviate hashes when hash algo is known Patrick Steinhardt
2024-04-23 5:07 ` [PATCH v2 04/12] attr: don't recompute default attribute source Patrick Steinhardt
2024-04-23 5:07 ` [PATCH v2 05/12] attr: fix BUG() when parsing attrs outside of repo Patrick Steinhardt
2024-04-23 5:07 ` [PATCH v2 06/12] remote-curl: fix parsing of detached SHA256 heads Patrick Steinhardt
2024-04-23 5:07 ` [PATCH v2 07/12] builtin/rev-parse: allow shortening to more than 40 hex characters Patrick Steinhardt
2024-04-23 5:08 ` [PATCH v2 08/12] builtin/blame: don't access potentially unitialized `the_hash_algo` Patrick Steinhardt
2024-04-23 5:08 ` [PATCH v2 09/12] builtin/bundle: abort "verify" early when there is no repository Patrick Steinhardt
2024-04-23 5:08 ` [PATCH v2 10/12] builtin/diff: explicitly set hash algo when there is no repo Patrick Steinhardt
2024-04-23 5:08 ` [PATCH v2 11/12] builtin/shortlog: don't set up revisions without repo Patrick Steinhardt
2024-04-23 5:08 ` [PATCH v2 12/12] repository: stop setting SHA1 as the default object hash Patrick Steinhardt
2024-04-27 22:09 ` [PATCH v2 00/12] Stop relying on SHA1 fallback for `the_hash_algo` Junio C Hamano
2024-04-29 6:05 ` Patrick Steinhardt
2024-04-29 6:34 ` [PATCH v3 00/13] " Patrick Steinhardt
2024-04-29 6:34 ` [PATCH v3 01/13] path: harden validation of HEAD with non-standard hashes Patrick Steinhardt
2024-04-29 6:34 ` [PATCH v3 02/13] path: move `validate_headref()` to its only user Patrick Steinhardt
2024-04-29 6:34 ` [PATCH v3 03/13] parse-options-cb: only abbreviate hashes when hash algo is known Patrick Steinhardt
2024-04-29 6:34 ` [PATCH v3 04/13] attr: don't recompute default attribute source Patrick Steinhardt
2024-04-29 6:34 ` [PATCH v3 05/13] attr: fix BUG() when parsing attrs outside of repo Patrick Steinhardt
2024-04-29 6:34 ` [PATCH v3 06/13] remote-curl: fix parsing of detached SHA256 heads Patrick Steinhardt
2024-04-29 6:34 ` [PATCH v3 07/13] builtin/rev-parse: allow shortening to more than 40 hex characters Patrick Steinhardt
2024-04-29 6:34 ` [PATCH v3 08/13] builtin/blame: don't access potentially unitialized `the_hash_algo` Patrick Steinhardt
2024-04-29 6:34 ` [PATCH v3 09/13] builtin/bundle: abort "verify" early when there is no repository Patrick Steinhardt
2024-04-29 6:34 ` [PATCH v3 10/13] builtin/diff: explicitly set hash algo when there is no repo Patrick Steinhardt
2024-04-29 6:35 ` [PATCH v3 11/13] builtin/shortlog: don't set up revisions without repo Patrick Steinhardt
2024-04-29 6:35 ` [PATCH v3 12/13] oss-fuzz/commit-graph: set up hash algorithm Patrick Steinhardt
2024-04-29 6:35 ` Patrick Steinhardt [this message]
2024-05-07 4:52 ` [PATCH v4 00/13] Stop relying on SHA1 fallback for `the_hash_algo` Patrick Steinhardt
2024-05-07 4:52 ` [PATCH v4 01/13] path: harden validation of HEAD with non-standard hashes Patrick Steinhardt
2024-05-07 4:52 ` [PATCH v4 02/13] path: move `validate_headref()` to its only user Patrick Steinhardt
2024-05-07 4:52 ` [PATCH v4 03/13] parse-options-cb: only abbreviate hashes when hash algo is known Patrick Steinhardt
2024-05-07 4:53 ` [PATCH v4 04/13] attr: don't recompute default attribute source Patrick Steinhardt
2024-05-07 4:53 ` [PATCH v4 05/13] attr: fix BUG() when parsing attrs outside of repo Patrick Steinhardt
2024-05-07 4:53 ` [PATCH v4 06/13] remote-curl: fix parsing of detached SHA256 heads Patrick Steinhardt
2024-05-07 4:53 ` [PATCH v4 07/13] builtin/rev-parse: allow shortening to more than 40 hex characters Patrick Steinhardt
2024-05-07 4:53 ` [PATCH v4 08/13] builtin/blame: don't access potentially unitialized `the_hash_algo` Patrick Steinhardt
2024-05-07 4:53 ` [PATCH v4 09/13] builtin/bundle: abort "verify" early when there is no repository Patrick Steinhardt
2024-05-07 4:53 ` [PATCH v4 10/13] builtin/diff: explicitly set hash algo when there is no repo Patrick Steinhardt
2024-05-07 4:53 ` [PATCH v4 11/13] builtin/shortlog: don't set up revisions without repo Patrick Steinhardt
2024-05-07 4:53 ` [PATCH v4 12/13] oss-fuzz/commit-graph: set up hash algorithm Patrick Steinhardt
2024-05-07 4:53 ` [PATCH v4 13/13] repository: stop setting SHA1 as the default object hash Patrick Steinhardt
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