From: Zefan Li <lizefan@huawei.com>
To: Tejun Heo <tj@kernel.org>
Cc: Cgroups <cgroups@vger.kernel.org>,
LKML <linux-kernel@vger.kernel.org>,
Dan Carpenter <dan.carpenter@oracle.com>
Subject: [PATCH] cgroup: fix missing unlock in cgroup_release_agent()
Date: Sat, 20 Sep 2014 14:35:43 +0800 [thread overview]
Message-ID: <541D203F.4020902@huawei.com> (raw)
The patch 971ff4935538: "cgroup: use a per-cgroup work for release
agent" from Sep 18, 2014, leads to the following static checker
warning:
kernel/cgroup.c:5310 cgroup_release_agent()
warn: 'mutex:&cgroup_mutex' is sometimes locked here and sometimes unlocked.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Zefan Li <lizefan@huawei.com>
---
kernel/cgroup.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/kernel/cgroup.c b/kernel/cgroup.c
index 7f23551..33f15b3 100644
--- a/kernel/cgroup.c
+++ b/kernel/cgroup.c
@@ -5290,7 +5290,10 @@ static void cgroup_release_agent(struct work_struct *work)
mutex_unlock(&cgroup_mutex);
call_usermodehelper(argv[0], argv, envp, UMH_WAIT_EXEC);
+ goto out_free;
out:
+ mutex_unlock(&cgroup_mutex);
+out_free:
kfree(agentbuf);
kfree(pathbuf);
}
--
1.8.0.2
next reply other threads:[~2014-09-20 6:36 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-20 6:35 Zefan Li [this message]
2014-09-20 16:24 ` Tejun Heo
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=541D203F.4020902@huawei.com \
--to=lizefan@huawei.com \
--cc=cgroups@vger.kernel.org \
--cc=dan.carpenter@oracle.com \
--cc=linux-kernel@vger.kernel.org \
--cc=tj@kernel.org \
/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
Powered by JetHome