Commit c361016a authored by Andreas Gruenbacher's avatar Andreas Gruenbacher Committed by Al Viro

vfs: Check attribute names in posix acl xattr handers

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: default avatarAndreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 7c7afc44
......@@ -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)
......
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