The get and set operations of the posix acl xattr handlers failed to check
the attribute names, so all names with "system.posix_acl_access" or
"system.posix_acl_default" as a prefix were accepted. Reject invalid names
from now on.
Signed-off-by: Andreas Gruenbacher <agrue...@redhat.com>
---
fs/posix_acl.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/fs/posix_acl.c b/fs/posix_acl.c
index 4fb17de..b1a66e8 100644
--- a/fs/posix_acl.c
+++ b/fs/posix_acl.c
@@ -768,6 +768,8 @@ posix_acl_xattr_get(struct dentry *dentry, const char *name,
struct posix_acl *acl;
int error;
+ if (strcmp(name, "") != 0)
+ return -EINVAL;
if (!IS_POSIXACL(d_backing_inode(dentry)))
return -EOPNOTSUPP;
if (d_is_symlink(dentry))
@@ -793,6 +795,8 @@ posix_acl_xattr_set(struct dentry *dentry, const char *name,
struct posix_acl *acl = NULL;
int ret;
+ if (strcmp(name, "") != 0)
+ return -EINVAL;
if (!IS_POSIXACL(inode))
return -EOPNOTSUPP;
if (!inode->i_op->set_acl)
--
2.5.0
--
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