linux-kernel - [PATCH v2 01/11] vfs: extend vfs

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]

Date:	Thu,  1 Mar 2012 14:10:38 -0500
From:	Mimi Zohar <zohar@...ux.vnet.ibm.com>
To:	linux-security-module@...r.kernel.org
Cc:	Mimi Zohar <zohar@...ux.vnet.ibm.com>,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org,
	Al Viro <viro@...IV.linux.org.uk>,
	David Safford <safford@...ux.vnet.ibm.com>,
	Dmitry Kasatkin <dmitry.kasatkin@...el.com>,
	Mimi Zohar <zohar@...ibm.com>,
	Dmitry Kasatkin <dmitry.kasatkin@...ia.com>
Subject: [PATCH v2 01/11] vfs: extend vfs_removexattr locking

This patch takes the i_mutex lock before security_inode_removexattr(),
instead of after, in preparation of calling ima_inode_removexattr().

Signed-off-by: Mimi Zohar <zohar@...ibm.com>
Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@...ia.com>
---
 fs/xattr.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/fs/xattr.c b/fs/xattr.c
index 82f4337..6112c92 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -294,11 +294,13 @@ vfs_removexattr(struct dentry *dentry, const char *name)
 	if (error)
 		return error;
 
+	mutex_lock(&inode->i_mutex);
 	error = security_inode_removexattr(dentry, name);
-	if (error)
+	if (error) {
+		mutex_unlock(&inode->i_mutex);
 		return error;
+	}
 
-	mutex_lock(&inode->i_mutex);
 	error = inode->i_op->removexattr(dentry, name);
 	mutex_unlock(&inode->i_mutex);
 
-- 
1.7.6.5

--
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/