linux-kernel - Re: [PATCH] Fix for bad lock balance in Containers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20070627073455.GB17922@linux.vnet.ibm.com>
Date:	Wed, 27 Jun 2007 13:04:55 +0530
From:	Dhaval Giani <dhaval@...ux.vnet.ibm.com>
To:	menage@...gle.com
Cc:	Srivatsa Vaddagiri <vatsa@...ux.vnet.ibm.com>,
	Balbir Singh <balbir@...ibm.com>, svaidy@...ux.vnet.ibm.com,
	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	bharata@...ux.vnet.ibm.com
Subject: Re: [PATCH] Fix for bad lock balance in Containers

On Tue, Jun 26, 2007 at 10:30:11AM +0530, Dhaval Giani wrote:
Hi,

There was a mistake in the patch. Thanks to Andrew Morton for pointing it out.
Sending out a fresh patch. Sorry for the mistake!
 
>  		BUG_ON(ret);
>  	} else {
>  		/* Reuse the existing superblock */
> +		down_write(&(root->sb->umount));

Should be down_write(&(root->sb->s_umount));

>  		ret = simple_set_mnt(mnt, root->sb);
>  		if (!ret)
>  			atomic_inc(&root->sb->s_active);

Signed-off-by: Dhaval Giani <dhaval@...ux.vnet.ibm.com>


--- linux-2.6.22-rc4/kernel/container.c	2007-06-13 15:38:32.000000000 +0530
+++ old/kernel/container.c	2007-06-25 00:55:03.000000000 +0530
@@ -995,6 +995,7 @@ static int container_get_sb(struct file_
 		BUG_ON(ret);
 	} else {
 		/* Reuse the existing superblock */
+		down_write(&(root->sb->s_umount));
 		ret = simple_set_mnt(mnt, root->sb);
 		if (!ret)
 			atomic_inc(&root->sb->s_active);
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/