diff mbox

[-V6,12/26] vfs: Make acl_permission_check() work for richacls

Message ID 1315243548-18664-13-git-send-email-aneesh.kumar@linux.vnet.ibm.com (mailing list archive)
State New, archived
Headers show

Commit Message

Aneesh Kumar K.V Sept. 5, 2011, 5:25 p.m. UTC 
From: Andreas Gruenbacher <agruen@kernel.org>

Signed-off-by: Andreas Gruenbacher <agruen@kernel.org>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 fs/namei.c |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)
diff mbox

Patch

diff --git a/fs/namei.c b/fs/namei.c
index a4d61d1..ce67eb1 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -230,6 +230,20 @@  static int acl_permission_check(struct inode *inode, int mask)
 	if (current_user_ns() != inode_userns(inode))
 		goto other_perms;
 
+	if (IS_RICHACL(inode)) {
+		int error = check_acl(inode, mask);
+		if (error != -EAGAIN)
+			return error;
+		if (mask & (MAY_DELETE_SELF | MAY_TAKE_OWNERSHIP |
+			    MAY_CHMOD | MAY_SET_TIMES)) {
+			/*
+			 * The file permission bit cannot grant these
+			 * permissions.
+			 */
+			return -EACCES;
+		}
+	}
+
 	if (likely(current_fsuid() == inode->i_uid))
 		mode >>= 6;
 	else {