tree 37bf95af38d5a829edb322663d26df69a1287b94
parent 8bb735216a0675e247bbe8b8b92c09d6884d1a17
author Anton Altaparmakov <[EMAIL PROTECTED]> Thu, 08 Sep 2005 16:52:31 +0100
committer Anton Altaparmakov <[EMAIL PROTECTED]> Thu, 08 Sep 2005 16:52:31 +0100

NTFS: Fix handling of valid but empty mapping pairs array in
      fs/ntfs/runlist.c::ntfs_mapping_pairs_decompress().

Signed-off-by: Anton Altaparmakov <[EMAIL PROTECTED]>

 fs/ntfs/ChangeLog |    2 ++
 fs/ntfs/runlist.c |    3 +++
 2 files changed, 5 insertions(+)

diff --git a/fs/ntfs/ChangeLog b/fs/ntfs/ChangeLog
--- a/fs/ntfs/ChangeLog
+++ b/fs/ntfs/ChangeLog
@@ -46,6 +46,8 @@ ToDo/Notes:
        - Fix two nasty runlist merging bugs that had gone unnoticed so far.
          Thanks to Stefano Picerno for the bug report.
        - Remove two bogus BUG_ON()s from fs/ntfs/mft.c.
+       - Fix handling of valid but empty mapping pairs array in
+         fs/ntfs/runlist.c::ntfs_mapping_pairs_decompress().
 
 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/runlist.c b/fs/ntfs/runlist.c
--- a/fs/ntfs/runlist.c
+++ b/fs/ntfs/runlist.c
@@ -760,6 +760,9 @@ runlist_element *ntfs_mapping_pairs_deco
                ntfs_error(vol->sb, "Corrupt attribute.");
                return ERR_PTR(-EIO);
        }
+       /* If the mapping pairs array is valid but empty, nothing to do. */
+       if (!vcn && !*buf)
+               return old_rl;
        /* Current position in runlist array. */
        rlpos = 0;
        /* Allocate first page and set current runlist size to one page. */
-
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