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NTFS: Fix an (innocent) off-by-one error in the runlist code.

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Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
This commit is contained in:
Anton Altaparmakov 2006-03-23 14:57:43 +00:00
parent b4d8d1a93c
commit 67b1dfe77a
5 changed files with 17 additions and 7 deletions
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6
fs/ntfs/ChangeLog
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@ -19,6 +19,12 @@ ToDo/Notes:
- Enable the code for setting the NT4 compatibility flag when we start - Enable the code for setting the NT4 compatibility flag when we start
making NTFS 1.2 specific modifications. making NTFS 1.2 specific modifications.
2.1.27 - Various bug fixes.
- Fix two compiler warnings on Alpha. Thanks to Andrew Morton for
reporting them.
- Fix an (innocent) off-by-one error in the runlist code.
2.1.26 - Minor bug fixes and updates. 2.1.26 - Minor bug fixes and updates.
- Fix a potential overflow in file.c where a cast to s64 was missing in - Fix a potential overflow in file.c where a cast to s64 was missing in

2
fs/ntfs/Makefile
View file

@ -6,7 +6,7 @@ ntfs-objs := aops.o attrib.o collate.o compress.o debug.o dir.o file.o \
index.o inode.o mft.o mst.o namei.o runlist.o super.o sysctl.o \ index.o inode.o mft.o mst.o namei.o runlist.o super.o sysctl.o \
unistr.o upcase.o unistr.o upcase.o
EXTRA_CFLAGS = -DNTFS_VERSION=\"2.1.26\" EXTRA_CFLAGS = -DNTFS_VERSION=\"2.1.27\"
ifeq ($(CONFIG_NTFS_DEBUG),y) ifeq ($(CONFIG_NTFS_DEBUG),y)
EXTRA_CFLAGS += -DDEBUG EXTRA_CFLAGS += -DDEBUG

2
fs/ntfs/namei.c
View file

@ -2,7 +2,7 @@
* namei.c - NTFS kernel directory inode operations. Part of the Linux-NTFS * namei.c - NTFS kernel directory inode operations. Part of the Linux-NTFS
* project. * project.
* *
* Copyright (c) 2001-2004 Anton Altaparmakov * Copyright (c) 2001-2006 Anton Altaparmakov
* *
* This program/include file is free software; you can redistribute it and/or * 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 * modify it under the terms of the GNU General Public License as published

12
fs/ntfs/runlist.c
View file

@ -381,6 +381,7 @@ static inline runlist_element *ntfs_rl_insert(runlist_element *dst,
static inline runlist_element *ntfs_rl_replace(runlist_element *dst, static inline runlist_element *ntfs_rl_replace(runlist_element *dst,
int dsize, runlist_element *src, int ssize, int loc) int dsize, runlist_element *src, int ssize, int loc)
{ {
signed delta;
BOOL left = FALSE; /* Left end of @src needs merging. */ BOOL left = FALSE; /* Left end of @src needs merging. */
BOOL right = FALSE; /* Right end of @src needs merging. */ BOOL right = FALSE; /* Right end of @src needs merging. */
int tail; /* Start of tail of @dst. */ int tail; /* Start of tail of @dst. */
@ -396,11 +397,14 @@ static inline runlist_element *ntfs_rl_replace(runlist_element *dst,
left = ntfs_are_rl_mergeable(dst + loc - 1, src); left = ntfs_are_rl_mergeable(dst + loc - 1, src);
/* /*
* Allocate some space. We will need less if the left, right, or both * Allocate some space. We will need less if the left, right, or both
* ends get merged. * ends get merged. The -1 accounts for the run being replaced.
*/ */
dst = ntfs_rl_realloc(dst, dsize, dsize + ssize - left - right); delta = ssize - 1 - left - right;
if (IS_ERR(dst)) if (delta > 0) {
return dst; dst = ntfs_rl_realloc(dst, dsize, dsize + delta);
if (IS_ERR(dst))
return dst;
}
/* /*
* We are guaranteed to succeed from here so can start modifying the * We are guaranteed to succeed from here so can start modifying the
* original runlists. * original runlists.

2
fs/ntfs/super.c
View file

@ -3234,7 +3234,7 @@ static void __exit exit_ntfs_fs(void)
} }
MODULE_AUTHOR("Anton Altaparmakov <aia21@cantab.net>"); MODULE_AUTHOR("Anton Altaparmakov <aia21@cantab.net>");
MODULE_DESCRIPTION("NTFS 1.2/3.x driver - Copyright (c) 2001-2005 Anton Altaparmakov"); MODULE_DESCRIPTION("NTFS 1.2/3.x driver - Copyright (c) 2001-2006 Anton Altaparmakov");
MODULE_VERSION(NTFS_VERSION); MODULE_VERSION(NTFS_VERSION);
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");
#ifdef DEBUG #ifdef DEBUG