NTFS: Fix a stupid bug in __ntfs_bitmap_set_bits_in_run() which caused the
count to become negative and hence we had a wild memset() scribbling
all over the system's ram.
Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
diff --git a/fs/ntfs/ChangeLog b/fs/ntfs/ChangeLog
index 83f3322..de58579 100644
--- a/fs/ntfs/ChangeLog
+++ b/fs/ntfs/ChangeLog
@@ -102,6 +102,9 @@
inode instead of a vfs inode as parameter.
- Fix the definition of the CHKD ntfs record magic. It had an off by
two error causing it to be CHKB instead of CHKD.
+ - Fix a stupid bug in __ntfs_bitmap_set_bits_in_run() which caused the
+ count to become negative and hence we had a wild memset() scribbling
+ all over the system's ram.
2.1.23 - Implement extension of resident files and make writing safe as well as
many bug fixes, cleanups, and enhancements...
diff --git a/fs/ntfs/bitmap.c b/fs/ntfs/bitmap.c
index 12cf2e3..7a190cd 100644
--- a/fs/ntfs/bitmap.c
+++ b/fs/ntfs/bitmap.c
@@ -1,7 +1,7 @@
/*
* bitmap.c - NTFS kernel bitmap handling. Part of the Linux-NTFS project.
*
- * Copyright (c) 2004 Anton Altaparmakov
+ * Copyright (c) 2004-2005 Anton Altaparmakov
*
* This program/include file is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as published
@@ -90,7 +90,8 @@
/* If the first byte is partial, modify the appropriate bits in it. */
if (bit) {
u8 *byte = kaddr + pos;
- while ((bit & 7) && cnt--) {
+ while ((bit & 7) && cnt) {
+ cnt--;
if (value)
*byte |= 1 << bit++;
else