linux-kernel - Re: [RFC][PATCH] vfs: In mntput run deactivate

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Message-ID: <20140413054948.GN18016@ZenIV.linux.org.uk>
Date:	Sun, 13 Apr 2014 06:49:48 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	"Eric W. Biederman" <ebiederm@...ssion.com>
Cc:	Linus Torvalds <torvalds@...ux-foundation.org>,
	"Serge E. Hallyn" <serge@...lyn.com>,
	Linux-Fsdevel <linux-fsdevel@...r.kernel.org>,
	Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andy Lutomirski <luto@...capital.net>,
	Rob Landley <rob@...dley.net>,
	Miklos Szeredi <miklos@...redi.hu>,
	Christoph Hellwig <hch@...radead.org>,
	Karel Zak <kzak@...hat.com>,
	"J. Bruce Fields" <bfields@...ldses.org>,
	Fengguang Wu <fengguang.wu@...el.com>
Subject: Re: [RFC][PATCH] vfs: In mntput run deactivate_super on a shallow
 stack.

On Sun, Apr 13, 2014 at 06:39:56AM +0100, Al Viro wrote:
> 	type = get_fs_type("proc");
> 	ns = kmalloc(...);
> 	/* fill *ns */
> 	mnt = kern_mount_data(type, p);
s/p/ns/
> 	...
> 	if (error) {
> 		kern_unmount(mnt);
> 		kfree(p);
ditto.
> 		put_filesystem(type);
> 	}

BTW, miklos seems to have a  buggered gmail setup - every posting to that
thread triggers a bounce that appears to come from some kind of spam filters
there...
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