NFS: Prevent memory allocation failure in nfsacl_encode()

[mv-sheeva.git] / fs / posix_acl.c

diff --git a/fs/posix_acl.c b/fs/posix_acl.c
index aec931e09973716240bf55441622dccf95cf3c74..b1cf6bf4b41dea46feb35d8d6d02f4d5c88153f8 100644 (file)
--- a/fs/posix_acl.c
+++ b/fs/posix_acl.c
@@ -22,6 +22,7 @@
 
 #include <linux/errno.h>
 
+EXPORT_SYMBOL(posix_acl_init);
 EXPORT_SYMBOL(posix_acl_alloc);
 EXPORT_SYMBOL(posix_acl_clone);
 EXPORT_SYMBOL(posix_acl_valid);
@@ -31,6 +32,16 @@ EXPORT_SYMBOL(posix_acl_create_masq);
 EXPORT_SYMBOL(posix_acl_chmod_masq);
 EXPORT_SYMBOL(posix_acl_permission);
 
+/*
+ * Init a fresh posix_acl
+ */
+void
+posix_acl_init(struct posix_acl *acl, int count)
+{
+       atomic_set(&acl->a_refcount, 1);
+       acl->a_count = count;
+}
+
 /*
  * Allocate a new ACL with the specified number of entries.
  */
@@ -40,10 +51,8 @@ posix_acl_alloc(int count, gfp_t flags)
        const size_t size = sizeof(struct posix_acl) +
                            count * sizeof(struct posix_acl_entry);
        struct posix_acl *acl = kmalloc(size, flags);
-       if (acl) {
-               atomic_set(&acl->a_refcount, 1);
-               acl->a_count = count;
-       }
+       if (acl)
+               posix_acl_init(acl, count);
        return acl;
 }
 
@@ -217,11 +226,11 @@ posix_acl_permission(struct inode *inode, const struct posix_acl *acl, int want)
                 switch(pa->e_tag) {
                         case ACL_USER_OBJ:
                                /* (May have been checked already) */
-                                if (inode->i_uid == current->fsuid)
+                               if (inode->i_uid == current_fsuid())
                                         goto check_perm;
                                 break;
                         case ACL_USER:
-                                if (pa->e_id == current->fsuid)
+                               if (pa->e_id == current_fsuid())
                                         goto mask;
                                break;
                         case ACL_GROUP_OBJ: