svn commit: r246757 - stable/9/sys/kern

[Sergey Kandaurov]

Author: pluknet
Date: Wed Feb 13 10:16:58 2013
New Revision: 246757
URL: http://svnweb.freebsd.org/changeset/base/246757

Log:
  MFC r246412:
    Prezero the acl structure which is to be copied to usermode, to avoid
    leakage of the previous content of padding and unitialized fields.

Modified:
  stable/9/sys/kern/vfs_acl.c
Directory Properties:
  stable/9/sys/   (props changed)

Modified: stable/9/sys/kern/vfs_acl.c
==============================================================================
--- stable/9/sys/kern/vfs_acl.c	Wed Feb 13 09:20:55 2013	(r246756)
+++ stable/9/sys/kern/vfs_acl.c	Wed Feb 13 10:16:58 2013	(r246757)
@@ -247,7 +247,7 @@ vacl_get_acl(struct thread *td, struct v
 	struct acl *inkernelacl;
 	int error;
 
-	inkernelacl = acl_alloc(M_WAITOK);
+	inkernelacl = acl_alloc(M_WAITOK | M_ZERO);
 	vn_lock(vp, LK_EXCLUSIVE | LK_RETRY);
 #ifdef MAC
 	error = mac_vnode_check_getacl(td->td_ucred, vp, type);