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ntfs-3g/compress-lastblock-v2.patch

40 lines
1.3 KiB

--- libntfs-3g/compress.c.ref 2013-05-07 10:50:28.000000000 +0200
+++ libntfs-3g/compress.c 2013-05-13 16:37:17.000000000 +0200
@@ -5,7 +5,7 @@
* Copyright (c) 2004-2005 Anton Altaparmakov
* Copyright (c) 2004-2006 Szabolcs Szakacsits
* Copyright (c) 2005 Yura Pakhuchiy
- * Copyright (c) 2009-2011 Jean-Pierre Andre
+ * Copyright (c) 2009-2013 Jean-Pierre Andre
*
* 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
@@ -753,6 +753,7 @@
ofs = 0;
} else {
s64 tdata_size, tinitialized_size;
+ int decompsz;
/*
* Compressed cb, decompress it into the temporary buffer, then
@@ -810,7 +811,10 @@
if (cb_pos + 2 <= cb_end)
*(u16*)cb_pos = 0;
ntfs_log_debug("Successfully read the compression block.\n");
- if (ntfs_decompress(dest, cb_size, cb, cb_size) < 0) {
+ /* Do not decompress beyond the requested block */
+ to_read = min(count, cb_size - ofs);
+ decompsz = ((ofs + to_read - 1) | (NTFS_SB_SIZE - 1)) + 1;
+ if (ntfs_decompress(dest, decompsz, cb, cb_size) < 0) {
err = errno;
free(cb);
free(dest);
@@ -819,7 +823,6 @@
errno = err;
return -1;
}
- to_read = min(count, cb_size - ofs);
memcpy(b, dest + ofs, to_read);
total += to_read;
count -= to_read;