From: Junio C Hamano <gitster@pobox.com>
To: Taylor Blau <me@ttaylorr.com>
Cc: git@vger.kernel.org, avarab@gmail.com, dstolee@microsoft.com,
peff@peff.net
Subject: Re: [PATCH 02/11] midx.c: don't leak MIDX from verify_midx_file
Date: Thu, 21 Oct 2021 09:27:02 -0700 [thread overview]
Message-ID: <xmqqr1cemjhl.fsf@gitster.g> (raw)
In-Reply-To: <b0c79904ab7bdaee7a1bc7a55b0fb26b1f2cf8d3.1634787555.git.me@ttaylorr.com> (Taylor Blau's message of "Wed, 20 Oct 2021 23:39:50 -0400")
Taylor Blau <me@ttaylorr.com> writes:
> The function midx.c:verify_midx_file() allocate a MIDX struct by calling
> load_multi_pack_index(). But when cleaning up, it calls free() without
> freeing any resources associated with the MIDX.
>
> Call the more appropriate close_midx() which does free those resources,
> which causes t5319.3 to pass when Git is compiled with SANITIZE=leak.
Nice.
By the way, the function starts like so:
int verify_midx_file(struct repository *r, const char *object_dir, unsigned flags)
{
struct pair_pos_vs_id *pairs = NULL;
uint32_t i;
struct progress *progress = NULL;
struct multi_pack_index *m = load_multi_pack_index(object_dir, 1);
verify_midx_error = 0;
if (!m) {
int result = 0;
struct stat sb;
char *filename = get_midx_filename(object_dir);
if (!stat(filename, &sb)) {
error(_("multi-pack-index file exists, but failed to parse"));
result = 1;
}
free(filename);
return result;
}
but after seeing die() sprinkled in load_multi_pack_index() with
checks during parsing, I am not sure if this is a good error
reporting mechanism we are seeing here.
It is wonderful to plug leaks here and there, but to be honest, even
with only a very little parts I saw in this code, I think there are
other things that need clean-up here.
Also, the way the file-scope global verify_midx_error is used is
beyond words _ugly_, if the only reason for its use is to make
midx_report() look simpler, which is what I think is happening.
Not very impressed, but all of the above is not a new issue
introduced by this patch.
Thanks.
next prev parent reply other threads:[~2021-10-21 16:27 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-21 3:39 [PATCH 00/11] midx: clean up t5319 under 'SANITIZE=leak' Taylor Blau
2021-10-21 3:39 ` [PATCH 01/11] midx.c: clean up chunkfile after reading the MIDX Taylor Blau
2021-10-21 5:50 ` Junio C Hamano
2021-10-21 11:34 ` Ævar Arnfjörð Bjarmason
2021-10-21 16:16 ` Junio C Hamano
2021-10-22 3:04 ` Taylor Blau
2021-10-21 3:39 ` [PATCH 02/11] midx.c: don't leak MIDX from verify_midx_file Taylor Blau
2021-10-21 5:00 ` Eric Sunshine
2021-10-21 5:54 ` Junio C Hamano
2021-10-21 16:27 ` Junio C Hamano [this message]
2021-10-21 3:39 ` [PATCH 03/11] t/helper/test-read-midx.c: free MIDX within read_midx_file() Taylor Blau
2021-10-21 3:39 ` [PATCH 04/11] builtin/pack-objects.c: don't leak memory via arguments Taylor Blau
2021-10-21 3:39 ` [PATCH 05/11] builtin/repack.c: avoid leaking child arguments Taylor Blau
2021-10-21 13:32 ` Derrick Stolee
2021-10-21 18:47 ` Junio C Hamano
2021-10-21 16:37 ` Junio C Hamano
2021-10-22 3:21 ` Taylor Blau
2021-10-21 3:40 ` [PATCH 06/11] builtin/multi-pack-index.c: don't leak concatenated options Taylor Blau
2021-10-21 3:40 ` [PATCH 07/11] pack-bitmap.c: avoid leaking via midx_bitmap_filename() Taylor Blau
2021-10-21 16:54 ` Junio C Hamano
2021-10-22 4:27 ` Taylor Blau
2021-10-21 3:40 ` [PATCH 08/11] pack-bitmap.c: don't leak type-level bitmaps Taylor Blau
2021-10-21 16:59 ` Junio C Hamano
2021-10-21 3:40 ` [PATCH 09/11] pack-bitmap.c: more aggressively free in free_bitmap_index() Taylor Blau
2021-10-21 5:10 ` Eric Sunshine
2021-10-21 18:32 ` Junio C Hamano
2021-10-22 4:29 ` Taylor Blau
2021-10-21 18:43 ` Junio C Hamano
2021-10-21 3:40 ` [PATCH 10/11] pack-bitmap-write.c: don't return without stop_progress() Taylor Blau
2021-10-21 5:12 ` Eric Sunshine
2021-10-21 11:31 ` Ævar Arnfjörð Bjarmason
2021-10-21 18:39 ` Junio C Hamano
2021-10-22 4:32 ` Taylor Blau
2021-10-23 20:28 ` Junio C Hamano
2021-10-23 20:32 ` SubmittingPatchs: clarify choice of base and testing Junio C Hamano
2021-10-23 20:59 ` Ævar Arnfjörð Bjarmason
2021-10-23 21:31 ` Junio C Hamano
2021-10-23 21:40 ` Junio C Hamano
2021-10-25 8:59 ` Fabian Stelzer
2021-10-25 16:48 ` Junio C Hamano
2021-10-25 16:56 ` Junio C Hamano
2021-10-25 17:00 ` Junio C Hamano
2021-12-23 23:12 ` [PATCH v2] " Junio C Hamano
2021-12-28 17:47 ` Elijah Newren
2021-12-30 10:20 ` Fabian Stelzer
2021-12-30 20:18 ` Re* " Junio C Hamano
2021-10-21 3:40 ` [PATCH 11/11] t5319: UNLEAK() the remaining leaks Taylor Blau
2021-10-21 11:50 ` [PATCH 00/11] midx: clean up t5319 under 'SANITIZE=leak' Ævar Arnfjörð Bjarmason
2021-10-22 4:39 ` Taylor Blau
2021-10-22 8:23 ` Ævar Arnfjörð Bjarmason
2021-10-22 10:32 ` [PATCH] leak tests: add an interface to the LSAN_OPTIONS "suppressions" Ævar Arnfjörð Bjarmason
2021-10-26 20:23 ` Taylor Blau
2021-10-26 21:11 ` Jeff King
2021-10-26 21:30 ` Taylor Blau
2021-10-26 21:48 ` Jeff King
2021-10-27 8:04 ` Ævar Arnfjörð Bjarmason
2021-10-27 9:06 ` Jeff King
2021-10-27 20:21 ` Junio C Hamano
2021-10-27 20:57 ` Ævar Arnfjörð Bjarmason
2021-10-29 20:56 ` Jeff King
2021-10-29 21:05 ` Jeff King
2021-10-27 7:51 ` Ævar Arnfjörð Bjarmason
2021-10-21 13:37 ` [PATCH 00/11] midx: clean up t5319 under 'SANITIZE=leak' Derrick Stolee
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