Module Name: src
Committed By: jakllsch
Date: Wed Oct 3 23:32:43 UTC 2012
Modified Files:
src/sys/fs/msdosfs: msdosfs_vfsops.c
Log Message:
We don't actually want to round the number of elements in the bitmap
down. Fixes a self-inflicted buffer overrun.
(This was detected by chance that the top of the bitmap coincided with
a page boundary.)
To generate a diff of this commit:
cvs rdiff -u -r1.96 -r1.97 src/sys/fs/msdosfs/msdosfs_vfsops.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/fs/msdosfs/msdosfs_vfsops.c
diff -u src/sys/fs/msdosfs/msdosfs_vfsops.c:1.96 src/sys/fs/msdosfs/msdosfs_vfsops.c:1.97
--- src/sys/fs/msdosfs/msdosfs_vfsops.c:1.96 Sat Jul 7 16:18:50 2012
+++ src/sys/fs/msdosfs/msdosfs_vfsops.c Wed Oct 3 23:32:43 2012
@@ -1,4 +1,4 @@
-/* $NetBSD: msdosfs_vfsops.c,v 1.96 2012/07/07 16:18:50 tsutsui Exp $ */
+/* $NetBSD: msdosfs_vfsops.c,v 1.97 2012/10/03 23:32:43 jakllsch Exp $ */
/*-
* Copyright (C) 1994, 1995, 1997 Wolfgang Solfrank.
@@ -48,7 +48,7 @@
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: msdosfs_vfsops.c,v 1.96 2012/07/07 16:18:50 tsutsui Exp $");
+__KERNEL_RCSID(0, "$NetBSD: msdosfs_vfsops.c,v 1.97 2012/10/03 23:32:43 jakllsch Exp $");
#if defined(_KERNEL_OPT)
#include "opt_compat_netbsd.h"
@@ -771,7 +771,7 @@ msdosfs_mountfs(struct vnode *devvp, str
* Allocate memory for the bitmap of allocated clusters, and then
* fill it in.
*/
- pmp->pm_inusemap = malloc(((pmp->pm_maxcluster + N_INUSEBITS - 1)
+ pmp->pm_inusemap = malloc(((pmp->pm_maxcluster + N_INUSEBITS)
/ N_INUSEBITS)
* sizeof(*pmp->pm_inusemap),
M_MSDOSFSFAT, M_WAITOK);
