From: "SZEDER Gábor" <szeder.dev@gmail.com>
To: Junio C Hamano <gitster@pobox.com>
Cc: git@vger.kernel.org, "SZEDER Gábor" <szeder.dev@gmail.com>
Subject: [PATCH 15/15] name-rev: plug a memory leak in name_rev() in the deref case
Date: Thu, 19 Sep 2019 23:47:11 +0200 [thread overview]
Message-ID: <20190919214712.7348-17-szeder.dev@gmail.com> (raw)
In-Reply-To: <20190919214712.7348-1-szeder.dev@gmail.com>
The name_rev() function's 'tip_name' parameter is a freshly
xstrdup()ed string, so when name_rev() invokes:
tip_name = xstrfmt("%s^0", tip_name);
then the original 'tip_name' string is leaked.
Make sure that this string is free()d after it has been used as input
for that xstrfmt() call.
This only happens when name_rev() is invoked with a tag, i.e.
relatively infrequently in a usual repository, so any reduction in
memory usage is lost in the noise.
Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
---
builtin/name-rev.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/builtin/name-rev.c b/builtin/name-rev.c
index 3331075aa4..d65de04918 100644
--- a/builtin/name-rev.c
+++ b/builtin/name-rev.c
@@ -101,18 +101,22 @@ static struct rev_name *create_or_update_name(struct commit *commit,
}
static void name_rev(struct commit *start_commit,
- const char *tip_name, timestamp_t taggerdate,
+ const char *start_tip_name, timestamp_t taggerdate,
int from_tag, int deref)
{
struct commit_list *list = NULL;
+ const char *tip_name;
char *to_free = NULL;
parse_commit(start_commit);
if (start_commit->date < cutoff)
return;
- if (deref)
- tip_name = to_free = xstrfmt("%s^0", tip_name);
+ if (deref) {
+ tip_name = to_free = xstrfmt("%s^0", start_tip_name);
+ free((char*) start_tip_name);
+ } else
+ tip_name = start_tip_name;
if (!create_or_update_name(start_commit, tip_name, taggerdate, 0, 0,
from_tag)) {
--
2.23.0.331.g4e51dcdf11
next prev parent reply other threads:[~2019-09-19 21:47 UTC|newest]
Thread overview: 98+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-19 21:46 [PATCH 00/15] name-rev: eliminate recursion SZEDER Gábor
2019-09-19 21:46 ` [PATCH 01/15] t6120-describe: correct test repo history graph in comment SZEDER Gábor
2019-09-20 21:47 ` Junio C Hamano
2019-09-20 22:29 ` SZEDER Gábor
2019-09-28 4:06 ` Junio C Hamano
2019-09-19 21:46 ` [PATCH 02/15] t6120-describe: modernize the 'check_describe' helper SZEDER Gábor
2019-09-20 21:49 ` Junio C Hamano
2019-09-19 21:46 ` [PATCH 03/15] name-rev: use strip_suffix() in get_rev_name() SZEDER Gábor
2019-09-20 16:36 ` René Scharfe
2019-09-20 17:10 ` SZEDER Gábor
2019-09-19 21:46 ` [PATCH 04/15] name-rev: avoid unnecessary cast in name_ref() SZEDER Gábor
2019-09-20 16:37 ` René Scharfe
2019-09-19 21:47 ` [PATCH 05/15] name-rev: use sizeof(*ptr) instead of sizeof(type) in allocation SZEDER Gábor
2019-09-20 15:11 ` Derrick Stolee
2019-09-20 15:40 ` SZEDER Gábor
2019-09-20 16:37 ` René Scharfe
2019-09-19 21:47 ` [PATCH 06/15] t6120: add a test to cover inner conditions in 'git name-rev's name_rev() SZEDER Gábor
2019-09-20 15:14 ` Derrick Stolee
2019-09-20 15:44 ` SZEDER Gábor
2019-09-19 21:47 ` [PATCH 07/15] name-rev: extract creating/updating a 'struct name_rev' into a helper SZEDER Gábor
2019-09-20 15:18 ` Derrick Stolee
2019-09-22 8:18 ` [PATCH] name-rev: rewrite create_or_update_name() Martin Ågren
2019-12-09 12:43 ` SZEDER Gábor
2019-09-19 21:47 ` [PATCH 08/15] name-rev: pull out deref handling from the recursion SZEDER Gábor
2019-09-20 15:21 ` Derrick Stolee
2019-09-20 17:42 ` SZEDER Gábor
2019-09-20 16:37 ` René Scharfe
2019-09-20 18:13 ` SZEDER Gábor
2019-09-20 18:14 ` SZEDER Gábor
2019-09-21 9:57 ` SZEDER Gábor
2019-09-21 12:37 ` René Scharfe
2019-09-22 19:05 ` SZEDER Gábor
2019-09-23 18:43 ` René Scharfe
2019-09-23 18:59 ` SZEDER Gábor
2019-09-23 19:55 ` René Scharfe
2019-09-23 20:47 ` SZEDER Gábor
2019-09-24 17:03 ` René Scharfe
2019-09-26 17:33 ` SZEDER Gábor
2019-09-21 12:37 ` René Scharfe
2019-09-21 14:21 ` SZEDER Gábor
2019-09-21 15:52 ` René Scharfe
2019-09-19 21:47 ` [PATCH 09/15] name-rev: restructure parsing commits and applying date cutoff SZEDER Gábor
2019-09-21 12:37 ` René Scharfe
2019-09-19 21:47 ` [PATCH 10/15] name-rev: restructure creating/updating 'struct rev_name' instances SZEDER Gábor
2019-09-20 15:27 ` Derrick Stolee
2019-09-20 17:09 ` SZEDER Gábor
2019-09-19 21:47 ` [PATCH 11/15] name-rev: drop name_rev()'s 'generation' and 'distance' parameters SZEDER Gábor
2019-09-19 21:47 ` [PATCH 12/15] name-rev: eliminate recursion in name_rev() SZEDER Gábor
2019-09-19 21:47 ` [PATCH 13/15] name-rev: cleanup name_ref() SZEDER Gábor
2019-09-19 21:47 ` [PATCH 14/15] name-rev: plug a memory leak in name_rev() SZEDER Gábor
2019-09-19 21:47 ` [PATCH 14/15] name-rev: plug memory leak in name_rev() in the deref case SZEDER Gábor
2019-09-19 22:47 ` SZEDER Gábor
2019-09-19 21:47 ` SZEDER Gábor [this message]
2019-09-20 15:35 ` [PATCH 15/15] name-rev: plug a " Derrick Stolee
2019-09-19 21:47 ` [PATCH 15/15] name-rev: plug memory leak in name_rev() SZEDER Gábor
2019-09-19 22:48 ` SZEDER Gábor
2019-09-20 15:37 ` [PATCH 00/15] name-rev: eliminate recursion Derrick Stolee
2019-09-20 17:37 ` SZEDER Gábor
2019-11-12 10:38 ` [PATCH v2 00/13] " SZEDER Gábor
2019-11-12 10:38 ` [PATCH v2 01/13] t6120-describe: correct test repo history graph in comment SZEDER Gábor
2019-11-12 10:38 ` [PATCH v2 02/13] t6120-describe: modernize the 'check_describe' helper SZEDER Gábor
2019-11-27 18:02 ` Jonathan Tan
2019-11-12 10:38 ` [PATCH v2 03/13] name-rev: use strbuf_strip_suffix() in get_rev_name() SZEDER Gábor
2019-11-12 19:02 ` René Scharfe
2019-11-12 10:38 ` [PATCH v2 04/13] name-rev: avoid unnecessary cast in name_ref() SZEDER Gábor
2019-11-12 10:38 ` [PATCH v2 05/13] name-rev: use sizeof(*ptr) instead of sizeof(type) in allocation SZEDER Gábor
2019-11-12 10:38 ` [PATCH v2 06/13] t6120: add a test to cover inner conditions in 'git name-rev's name_rev() SZEDER Gábor
2019-11-12 10:38 ` [PATCH v2 07/13] name-rev: extract creating/updating a 'struct name_rev' into a helper SZEDER Gábor
2019-11-12 10:38 ` [PATCH v2 08/13] name-rev: pull out deref handling from the recursion SZEDER Gábor
2019-11-12 10:38 ` [PATCH v2 09/13] name-rev: restructure parsing commits and applying date cutoff SZEDER Gábor
2019-11-12 10:38 ` [PATCH v2 10/13] name-rev: restructure creating/updating 'struct rev_name' instances SZEDER Gábor
2019-11-12 10:38 ` [PATCH v2 11/13] name-rev: drop name_rev()'s 'generation' and 'distance' parameters SZEDER Gábor
2019-11-27 18:13 ` Jonathan Tan
2019-11-12 10:38 ` [PATCH v2 12/13] name-rev: eliminate recursion in name_rev() SZEDER Gábor
2019-11-27 17:57 ` Jonathan Tan
2019-12-09 12:22 ` SZEDER Gábor
2019-11-12 10:38 ` [PATCH v2 13/13] name-rev: cleanup name_ref() SZEDER Gábor
2019-11-27 18:01 ` Jonathan Tan
2019-12-09 12:32 ` SZEDER Gábor
2019-11-12 19:17 ` [PATCH v2 00/13] name-rev: eliminate recursion Johannes Schindelin
2019-11-13 19:25 ` Sebastiaan Dammann
2019-12-09 11:52 ` [PATCH v3 00/14] " SZEDER Gábor
2019-12-09 11:52 ` [PATCH v3 01/14] t6120-describe: correct test repo history graph in comment SZEDER Gábor
2019-12-09 11:52 ` [PATCH v3 02/14] t6120-describe: modernize the 'check_describe' helper SZEDER Gábor
2019-12-09 11:52 ` [PATCH v3 03/14] name-rev: use strbuf_strip_suffix() in get_rev_name() SZEDER Gábor
2019-12-09 11:52 ` [PATCH v3 04/14] name-rev: avoid unnecessary cast in name_ref() SZEDER Gábor
2019-12-09 11:52 ` [PATCH v3 05/14] name-rev: use sizeof(*ptr) instead of sizeof(type) in allocation SZEDER Gábor
2019-12-09 11:52 ` [PATCH v3 06/14] t6120: add a test to cover inner conditions in 'git name-rev's name_rev() SZEDER Gábor
2019-12-09 11:52 ` [PATCH v3 07/14] name-rev: extract creating/updating a 'struct name_rev' into a helper SZEDER Gábor
2019-12-09 11:52 ` [PATCH v3 08/14] name-rev: pull out deref handling from the recursion SZEDER Gábor
2019-12-09 11:52 ` [PATCH v3 09/14] name-rev: restructure parsing commits and applying date cutoff SZEDER Gábor
2019-12-09 11:52 ` [PATCH v3 10/14] name-rev: restructure creating/updating 'struct rev_name' instances SZEDER Gábor
2019-12-09 11:52 ` [PATCH v3 11/14] name-rev: drop name_rev()'s 'generation' and 'distance' parameters SZEDER Gábor
2019-12-09 11:52 ` [PATCH v3 12/14] name-rev: use 'name->tip_name' instead of 'tip_name' SZEDER Gábor
2019-12-09 11:52 ` [PATCH v3 13/14] name-rev: eliminate recursion in name_rev() SZEDER Gábor
2019-12-09 11:52 ` [PATCH v3 14/14] name-rev: cleanup name_ref() SZEDER Gábor
2019-12-09 15:08 ` [PATCH v3 00/14] name-rev: eliminate recursion Derrick Stolee
2019-12-11 17:33 ` Junio C Hamano
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