From: Phillip Wood <phillip.wood123@gmail.com>
To: "Ævar Arnfjörð Bjarmason" <avarab@gmail.com>, git@vger.kernel.org
Cc: Junio C Hamano <gitster@pobox.com>,
Phillip Wood <phillip.wood123@gmail.com>,
Jeff King <peff@peff.net>,
Derrick Stolee <derrickstolee@github.com>,
Elijah Newren <newren@gmail.com>
Subject: Re: [PATCH 13/17] rebase: don't leak on "--abort"
Date: Fri, 4 Nov 2022 14:42:25 +0000 [thread overview]
Message-ID: <f9df4dfc-6024-deb0-5277-bab96c81a875@dunelm.org.uk> (raw)
In-Reply-To: <patch-13.17-fda9914b558-20221103T164632Z-avarab@gmail.com>
Hi Ævar
On 03/11/2022 17:06, Ævar Arnfjörð Bjarmason wrote:
> Fix a leak in the recent 6159e7add49 (rebase --abort: improve reflog
> message, 2022-10-12). Before that commit we'd strbuf_release() the
> reflog message we were formatting, but when that code was refactored
> to use "ropts.head_msg" the strbuf_release() was omitted.
>
> Ideally the three users of "ropts" in cmd_rebase() should use
> different "ropts" variables, in practice they're completely separate,
> as this and the other user in the "switch" statement will "goto
> cleanup", which won't touch "ropts".
>
> The third caller after the "switch" is then unreachable if we take
> these two branches, so all of them are getting a "{ 0 }" init'd
> "ropts".
>
> So it's OK that we're leaving a stale pointer in "ropts.head_msg",
> cleaning it up was our responsibility, and it won't be used again.
This looks fine. One could argue that the leak is not a "real" leak as
we're about to exit but the omission of strbuf_release() was
unintentional and fix is nice and simple.
Thanks
Phillip
> Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
> ---
> builtin/rebase.c | 1 +
> t/t7517-per-repo-email.sh | 1 +
> 2 files changed, 2 insertions(+)
>
> diff --git a/builtin/rebase.c b/builtin/rebase.c
> index 64aed11c85d..8a8b5e34786 100644
> --- a/builtin/rebase.c
> +++ b/builtin/rebase.c
> @@ -1320,6 +1320,7 @@ int cmd_rebase(int argc, const char **argv, const char *prefix)
> if (reset_head(the_repository, &ropts) < 0)
> die(_("could not move back to %s"),
> oid_to_hex(&options.orig_head->object.oid));
> + strbuf_release(&head_msg);
> remove_branch_state(the_repository, 0);
> ret = finish_rebase(&options);
> goto cleanup;
> diff --git a/t/t7517-per-repo-email.sh b/t/t7517-per-repo-email.sh
> index 163ae804685..efc6496e2b2 100755
> --- a/t/t7517-per-repo-email.sh
> +++ b/t/t7517-per-repo-email.sh
> @@ -9,6 +9,7 @@ test_description='per-repo forced setting of email address'
> GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
> export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
>
> +TEST_PASSES_SANITIZE_LEAK=true
> . ./test-lib.sh
>
> test_expect_success 'setup a likely user.useConfigOnly use case' '
next prev parent reply other threads:[~2022-11-04 14:43 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-03 17:05 [PATCH 00/17] leak fixes: use existing constructors & other trivia Ævar Arnfjörð Bjarmason
2022-11-03 17:06 ` [PATCH 01/17] tests: mark tests as passing with SANITIZE=leak Ævar Arnfjörð Bjarmason
2022-11-03 17:06 ` [PATCH 02/17] {reset,merge}: call discard_index() before returning Ævar Arnfjörð Bjarmason
2022-11-03 17:06 ` [PATCH 03/17] commit: discard partial cache before (re-)reading it Ævar Arnfjörð Bjarmason
2022-11-03 17:06 ` [PATCH 04/17] read-cache.c: clear and free "sparse_checkout_patterns" Ævar Arnfjörð Bjarmason
2022-11-03 17:06 ` [PATCH 05/17] dir.c: free "ident" and "exclude_per_dir" in "struct untracked_cache" Ævar Arnfjörð Bjarmason
2022-11-03 17:06 ` [PATCH 06/17] built-ins & libs & helpers: add/move destructors, fix leaks Ævar Arnfjörð Bjarmason
2022-11-03 17:06 ` [PATCH 07/17] unpack-file: fix ancient leak in create_temp_file() Ævar Arnfjörð Bjarmason
2022-11-03 17:06 ` [PATCH 08/17] revision API: call graph_clear() in release_revisions() Ævar Arnfjörð Bjarmason
2022-11-03 17:06 ` [PATCH 09/17] ls-files: fix a --with-tree memory leak Ævar Arnfjörð Bjarmason
2022-11-03 17:06 ` [PATCH 10/17] sequencer.c: fix "opts->strategy" leak in read_strategy_opts() Ævar Arnfjörð Bjarmason
2022-11-04 14:50 ` Phillip Wood
2022-11-04 21:44 ` Taylor Blau
2022-11-05 12:43 ` Ævar Arnfjörð Bjarmason
2022-11-08 15:00 ` Phillip Wood
2022-11-08 15:26 ` Ævar Arnfjörð Bjarmason
2022-11-03 17:06 ` [PATCH 11/17] connected.c: free the "struct packed_git" Ævar Arnfjörð Bjarmason
2022-11-03 17:06 ` [PATCH 12/17] sequencer.c: fix a pick_commits() leak Ævar Arnfjörð Bjarmason
2022-11-03 17:06 ` [PATCH 13/17] rebase: don't leak on "--abort" Ævar Arnfjörð Bjarmason
2022-11-04 14:42 ` Phillip Wood [this message]
2022-11-05 12:01 ` Ævar Arnfjörð Bjarmason
2022-11-03 17:06 ` [PATCH 14/17] sequencer.c: fix sequencer_continue() leak Ævar Arnfjörð Bjarmason
2022-11-03 17:06 ` [PATCH 15/17] cherry-pick: free "struct replay_opts" members Ævar Arnfjörð Bjarmason
2022-11-03 17:06 ` [PATCH 16/17] revert: fix parse_options_concat() leak Ævar Arnfjörð Bjarmason
2022-11-03 17:06 ` [PATCH 17/17] built-ins: use free() not UNLEAK() if trivial, rm dead code Ævar Arnfjörð Bjarmason
2022-11-04 15:20 ` [PATCH 00/17] leak fixes: use existing constructors & other trivia Phillip Wood
2022-11-05 12:46 ` Ævar Arnfjörð Bjarmason
2022-11-07 9:46 ` Phillip Wood
2022-11-08 18:17 ` [PATCH v2 00/15] " Ævar Arnfjörð Bjarmason
2022-11-08 18:17 ` [PATCH v2 01/15] tests: mark tests as passing with SANITIZE=leak Ævar Arnfjörð Bjarmason
2022-11-08 18:17 ` [PATCH v2 02/15] {reset,merge}: call discard_index() before returning Ævar Arnfjörð Bjarmason
2022-11-08 18:17 ` [PATCH v2 03/15] commit: discard partial cache before (re-)reading it Ævar Arnfjörð Bjarmason
2022-11-08 18:17 ` [PATCH v2 04/15] read-cache.c: clear and free "sparse_checkout_patterns" Ævar Arnfjörð Bjarmason
2022-11-08 18:17 ` [PATCH v2 05/15] dir.c: free "ident" and "exclude_per_dir" in "struct untracked_cache" Ævar Arnfjörð Bjarmason
2022-11-08 18:17 ` [PATCH v2 06/15] built-ins & libs & helpers: add/move destructors, fix leaks Ævar Arnfjörð Bjarmason
2022-11-08 18:17 ` [PATCH v2 07/15] unpack-file: fix ancient leak in create_temp_file() Ævar Arnfjörð Bjarmason
2022-11-08 18:17 ` [PATCH v2 08/15] revision API: call graph_clear() in release_revisions() Ævar Arnfjörð Bjarmason
2022-11-08 18:17 ` [PATCH v2 09/15] ls-files: fix a --with-tree memory leak Ævar Arnfjörð Bjarmason
2022-11-08 18:17 ` [PATCH v2 10/15] sequencer.c: fix "opts->strategy" leak in read_strategy_opts() Ævar Arnfjörð Bjarmason
2022-11-08 18:17 ` [PATCH v2 11/15] connected.c: free the "struct packed_git" Ævar Arnfjörð Bjarmason
2022-11-08 18:17 ` [PATCH v2 12/15] rebase: don't leak on "--abort" Ævar Arnfjörð Bjarmason
2022-11-08 18:17 ` [PATCH v2 13/15] cherry-pick: free "struct replay_opts" members Ævar Arnfjörð Bjarmason
2022-11-08 18:17 ` [PATCH v2 14/15] revert: fix parse_options_concat() leak Ævar Arnfjörð Bjarmason
2022-11-08 18:17 ` [PATCH v2 15/15] built-ins: use free() not UNLEAK() if trivial, rm dead code Ævar Arnfjörð Bjarmason
2022-11-08 20:54 ` [PATCH v2 00/15] leak fixes: use existing constructors & other trivia Taylor Blau
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