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From: Konstantin Belousov <kib@FreeBSD.org>
Date: Mon, 9 Jan 2017 10:26:02 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org
Subject: svn commit: r311776 - stable/11/sys/kern
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Author: kib
Date: Mon Jan  9 10:26:02 2017
New Revision: 311776
URL: https://svnweb.freebsd.org/changeset/base/311776

Log:
  MFC r311113:
  There is no need to use temporary statfs buffer for fsid obliteration
  and prison enforcement.  Do it on the caller buffer directly.

Modified:
  stable/11/sys/kern/vfs_syscalls.c
Directory Properties:
  stable/11/   (props changed)

Modified: stable/11/sys/kern/vfs_syscalls.c
==============================================================================
--- stable/11/sys/kern/vfs_syscalls.c	Mon Jan  9 10:23:37 2017	(r311775)
+++ stable/11/sys/kern/vfs_syscalls.c	Mon Jan  9 10:26:02 2017	(r311776)
@@ -247,7 +247,7 @@ statfs_scale_blocks(struct statfs *sf, l
 static int
 kern_do_statfs(struct thread *td, struct mount *mp, struct statfs *buf)
 {
-	struct statfs *sp, sb;
+	struct statfs *sp;
 	int error;
 
 	if (mp == NULL)
@@ -271,13 +271,11 @@ kern_do_statfs(struct thread *td, struct
 	error = VFS_STATFS(mp, sp);
 	if (error != 0)
 		goto out;
+	*buf = *sp;
 	if (priv_check(td, PRIV_VFS_GENERATION)) {
-		bcopy(sp, &sb, sizeof(sb));
-		sb.f_fsid.val[0] = sb.f_fsid.val[1] = 0;
-		prison_enforce_statfs(td->td_ucred, mp, &sb);
-		sp = &sb;
+		buf->f_fsid.val[0] = buf->f_fsid.val[1] = 0;
+		prison_enforce_statfs(td->td_ucred, mp, buf);
 	}
-	*buf = *sp;
 out:
 	vfs_unbusy(mp);
 	return (error);