From: Dave Jones <davej@redhat.com>
To: Ming Lei <ming.lei@canonical.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-kernel@vger.kernel.org,
Sasha Levin <levinsasha928@gmail.com>
Subject: Re: [PATCH] sysfs: check if one entry has been removed before freeing
Date: Tue, 2 Apr 2013 23:04:03 -0400 [thread overview]
Message-ID: <20130403030403.GA26913@redhat.com> (raw)
In-Reply-To: <1364957903-10341-1-git-send-email-ming.lei@canonical.com>
On Wed, Apr 03, 2013 at 10:58:23AM +0800, Ming Lei wrote:
> diff --git a/fs/sysfs/dir.c b/fs/sysfs/dir.c
> index 1bf016b..328ef9b 100644
> --- a/fs/sysfs/dir.c
> +++ b/fs/sysfs/dir.c
> @@ -268,6 +268,13 @@ void release_sysfs_dirent(struct sysfs_dirent * sd)
> */
> parent_sd = sd->s_parent;
>
> + if (unlikely(!(sd->s_flags & SYSFS_FLAG_REMOVED))) {
> + printk(KERN_ERR "sysfs: free using entry: %s/%s\n",
> + parent_sd ? parent_sd->s_name : "",
> + sd->s_name);
> + BUG();
> + }
Please use WARN instead of BUG. For an in-ram filesystem like
sysfs, there's no real reason to lock-up the machine in this way
making it harder to debug.
Dave
next prev parent reply other threads:[~2013-04-03 3:04 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-03 2:58 [PATCH] sysfs: check if one entry has been removed before freeing Ming Lei
2013-04-03 3:04 ` Dave Jones [this message]
2013-04-03 3:52 ` Ming Lei
2013-04-03 5:35 ` Greg Kroah-Hartman
2013-04-03 7:05 ` Ming Lei
2013-04-03 16:08 ` Greg Kroah-Hartman
2013-04-04 9:36 ` Ming Lei
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