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From: Bryan Drewery <bdrewery@FreeBSD.org>
Date: Fri, 14 Mar 2014 01:43:55 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r263130 - head/sys/fs/tmpfs
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Author: bdrewery
Date: Fri Mar 14 01:43:55 2014
New Revision: 263130
URL: http://svnweb.freebsd.org/changeset/base/263130

Log:
  Fix -o size less than PAGE_SIZE resulting in SIZE_MAX being used.
  
  Discussed with:	kib
  MFC after:	2 weeks

Modified:
  head/sys/fs/tmpfs/tmpfs_vfsops.c

Modified: head/sys/fs/tmpfs/tmpfs_vfsops.c
==============================================================================
--- head/sys/fs/tmpfs/tmpfs_vfsops.c	Fri Mar 14 01:17:11 2014	(r263129)
+++ head/sys/fs/tmpfs/tmpfs_vfsops.c	Fri Mar 14 01:43:55 2014	(r263130)
@@ -200,11 +200,13 @@ tmpfs_mount(struct mount *mp)
 	 * allowed to use, based on the maximum size the user passed in
 	 * the mount structure.  A value of zero is treated as if the
 	 * maximum available space was requested. */
-	if (size_max < PAGE_SIZE || size_max > OFF_MAX - PAGE_SIZE ||
+	if (size_max == 0 || size_max > OFF_MAX - PAGE_SIZE ||
 	    (SIZE_MAX < OFF_MAX && size_max / PAGE_SIZE >= SIZE_MAX))
 		pages = SIZE_MAX;
-	else
+	else {
+		size_max = roundup(size_max, PAGE_SIZE);
 		pages = howmany(size_max, PAGE_SIZE);
+	}
 	MPASS(pages > 0);
 
 	if (nodes_max <= 3) {