From: Roberto Sassu Date: Tue, 5 Oct 2010 16:53:45 +0000 (+0200) Subject: ecryptfs: call vfs_setxattr() in ecryptfs_setxattr() X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=48b512e6857139393cdfce26348c362b87537018;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git ecryptfs: call vfs_setxattr() in ecryptfs_setxattr() Ecryptfs is a stackable filesystem which relies on lower filesystems the ability of setting/getting extended attributes. If there is a security module enabled on the system it updates the 'security' field of inodes according to the owned extended attribute set with the function vfs_setxattr(). When this function is performed on a ecryptfs filesystem the 'security' field is not updated for the lower filesystem since the call security_inode_post_setxattr() is missing for the lower inode. Further, the call security_inode_setxattr() is missing for the lower inode, leading to policy violations in the security module because specific checks for this hook are not performed (i. e. filesystem 'associate' permission on SELinux is not checked for the lower filesystem). This patch replaces the call of the setxattr() method of the lower inode in the function ecryptfs_setxattr() with vfs_setxattr(). Signed-off-by: Roberto Sassu Cc: stable Cc: Dustin Kirkland Acked-by: James Morris Signed-off-by: Tyler Hicks --- diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c index 3fbc94203380..63e6ec0e8b50 100644 --- a/fs/ecryptfs/inode.c +++ b/fs/ecryptfs/inode.c @@ -32,6 +32,7 @@ #include #include #include +#include #include #include "ecryptfs_kernel.h" @@ -1108,10 +1109,8 @@ ecryptfs_setxattr(struct dentry *dentry, const char *name, const void *value, rc = -EOPNOTSUPP; goto out; } - mutex_lock(&lower_dentry->d_inode->i_mutex); - rc = lower_dentry->d_inode->i_op->setxattr(lower_dentry, name, value, - size, flags); - mutex_unlock(&lower_dentry->d_inode->i_mutex); + + rc = vfs_setxattr(lower_dentry, name, value, size, flags); out: return rc; }