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Subject[PATCH -V5 11/24] vfs: Make acl_permission_check() work for richacls
Date
From: Andreas Gruenbacher <agruen@suse.de>

Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
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 --git a/fs/namei.c b/fs/namei.c
index 1b6dbc9..d7ff419 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -174,6 +174,20 @@ static int acl_permission_check(struct inode *inode, int mask, unsigned int flag
{
umode_t mode = inode->i_mode;

+ if (IS_RICHACL(inode)) {
+ int error = check_acl(inode, mask, flags);
+ 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 (current_fsuid() == inode->i_uid)
mode >>= 6;
else {
--
1.7.1


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