From: Anel Orazgaliyeva <anelkz@amazon.de>
To: unlisted-recipients:; (no To-header on input)
Cc: <anelkz@amazon.de>, Aman Priyadarshi <apeureka@amazon.de>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
Daniel Lezcano <daniel.lezcano@linaro.org>,
<linux-pm@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH] cpuidle: Fix memory leaks
Date: Mon, 6 Sep 2021 18:34:40 +0000 [thread overview]
Message-ID: <20210906183440.85710-1-anelkz@amazon.de> (raw)
Commit c343bf1ba5ef ("cpuidle: Fix three reference count leaks")
fixes the cleanup of kobjects; however, it removes kfree() calls
altogether, leading to memory leaks.
Fix those and also defer the initialization of dev->kobj_dev until
after the error check, so that we do not end up with a dangling
pointer.
Signed-off-by: Anel Orazgaliyeva <anelkz@amazon.de>
Suggested-by: Aman Priyadarshi <apeureka@amazon.de>
---
drivers/cpuidle/sysfs.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/cpuidle/sysfs.c b/drivers/cpuidle/sysfs.c
index 53ec9585ccd4..469e18547d06 100644
--- a/drivers/cpuidle/sysfs.c
+++ b/drivers/cpuidle/sysfs.c
@@ -488,6 +488,7 @@ static int cpuidle_add_state_sysfs(struct cpuidle_device *device)
&kdev->kobj, "state%d", i);
if (ret) {
kobject_put(&kobj->kobj);
+ kfree(kobj);
goto error_state;
}
cpuidle_add_s2idle_attr_group(kobj);
@@ -619,6 +620,7 @@ static int cpuidle_add_driver_sysfs(struct cpuidle_device *dev)
&kdev->kobj, "driver");
if (ret) {
kobject_put(&kdrv->kobj);
+ kfree(kdrv);
return ret;
}
@@ -705,7 +707,6 @@ int cpuidle_add_sysfs(struct cpuidle_device *dev)
if (!kdev)
return -ENOMEM;
kdev->dev = dev;
- dev->kobj_dev = kdev;
init_completion(&kdev->kobj_unregister);
@@ -713,9 +714,11 @@ int cpuidle_add_sysfs(struct cpuidle_device *dev)
"cpuidle");
if (error) {
kobject_put(&kdev->kobj);
+ kfree(kdev);
return error;
}
+ dev->kobj_dev = kdev;
kobject_uevent(&kdev->kobj, KOBJ_ADD);
return 0;
--
2.32.0
Amazon Development Center Germany GmbH
Krausenstr. 38
10117 Berlin
Geschaeftsfuehrung: Christian Schlaeger, Jonathan Weiss
Eingetragen am Amtsgericht Charlottenburg unter HRB 149173 B
Sitz: Berlin
Ust-ID: DE 289 237 879
next reply other threads:[~2021-09-06 18:35 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-06 18:34 Anel Orazgaliyeva [this message]
2021-09-15 12:14 ` [PATCH] cpuidle: Fix memory leaks Rafael J. Wysocki
2021-09-15 15:44 ` Anel Orazgaliyeva
2021-10-01 18:45 ` Rafael J. Wysocki
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210906183440.85710-1-anelkz@amazon.de \
--to=anelkz@amazon.de \
--cc=apeureka@amazon.de \
--cc=daniel.lezcano@linaro.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=rjw@rjwysocki.net \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).