[PATCH 3/7] Re: [2.6-BK-URL] NTFS 2.1.18 release

[Anton Altaparmakov]

This is patch 3/7 in the series.  It contains the following ChangeSet:

<aia21@xxxxxxxxxx> (04/09/16 1.1867.9.2)
   NTFS: Fix a potential bug in fs/ntfs/mft.c::map_extent_mft_record() that
         could occur in the future for when we start closing/freeing extent
         inodes if we don't set base_ni->ext.extent_ntfs_inos to NULL after
         we free it.
   
   Signed-off-by: Anton Altaparmakov <aia21@xxxxxxxxxx>

Best regards,

	Anton
-- 
Anton Altaparmakov <aia21 at cam.ac.uk> (replace at with @)
Unix Support, Computing Service, University of Cambridge, CB2 3QH, UK
Linux NTFS maintainer / IRC: #ntfs on irc.freenode.net
WWW: http://linux-ntfs.sf.net/, http://www-stu.christs.cam.ac.uk/~aia21/

===================================================================

diff -Nru a/fs/ntfs/mft.c b/fs/ntfs/mft.c
--- a/fs/ntfs/mft.c	2004-09-22 13:02:40 +01:00
+++ b/fs/ntfs/mft.c	2004-09-22 13:02:40 +01:00
@@ -418,7 +418,8 @@
 			m = ERR_PTR(-ENOMEM);
 			goto unm_err_out;
 		}
-		if (base_ni->ext.extent_ntfs_inos) {
+		if (base_ni->nr_extents) {
+			BUG_ON(!base_ni->ext.extent_ntfs_inos);
 			memcpy(tmp, base_ni->ext.extent_ntfs_inos, new_size -
 					4 * sizeof(ntfs_inode *));
 			kfree(base_ni->ext.extent_ntfs_inos);
-
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