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authorAnton Altaparmakov <aia21@cantab.net>2005-10-04 13:06:00 +0100
committerAnton Altaparmakov <aia21@cantab.net>2005-10-04 13:06:00 +0100
commit18efefa9355119b4f6d9b73b074ebbf9882c37c3 (patch)
tree06be664fb85896e6506c3cc8e79ba33e963ce79c /fs
parented39f731ab2e77e58122232f6e27333331d7793d (diff)
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>
Diffstat (limited to 'fs')
-rw-r--r--fs/ntfs/ChangeLog3
-rw-r--r--fs/ntfs/bitmap.c5
2 files changed, 6 insertions, 2 deletions
diff --git a/fs/ntfs/ChangeLog b/fs/ntfs/ChangeLog
index 83f3322765cd..de58579a1d0e 100644
--- a/fs/ntfs/ChangeLog
+++ b/fs/ntfs/ChangeLog
@@ -102,6 +102,9 @@ ToDo/Notes:
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 12cf2e30c7dd..7a190cdc60e2 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 @@ int __ntfs_bitmap_set_bits_in_run(struct inode *vi, const s64 start_bit,
/* 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