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NTFS: Fix a stupid bug in __ntfs_bitmap_set_bits_in_run() which caused the

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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>
This commit is contained in:
Anton Altaparmakov 2005-10-04 13:06:00 +01:00
parent ed39f731ab
commit 18efefa935
2 changed files with 6 additions and 2 deletions
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3
fs/ntfs/ChangeLog
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@ -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...

5
fs/ntfs/bitmap.c
View File

@ -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