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NTFS: Fix handling of valid but empty mapping pairs array in

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fs/ntfs/runlist.c::ntfs_mapping_pairs_decompress().

Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
This commit is contained in:
Anton Altaparmakov
2005-09-08 16:52:31 +01:00
parent 8bb735216a
commit 2b0ada2b8e
2 changed files with 5 additions and 0 deletions
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2
fs/ntfs/ChangeLog
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@@ -46,6 +46,8 @@ ToDo/Notes:
- Fix two nasty runlist merging bugs that had gone unnoticed so far. - Fix two nasty runlist merging bugs that had gone unnoticed so far.
Thanks to Stefano Picerno for the bug report. Thanks to Stefano Picerno for the bug report.
- Remove two bogus BUG_ON()s from fs/ntfs/mft.c. - 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 2.1.23 - Implement extension of resident files and make writing safe as well as
many bug fixes, cleanups, and enhancements... many bug fixes, cleanups, and enhancements...

3
fs/ntfs/runlist.c
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@@ -760,6 +760,9 @@ runlist_element *ntfs_mapping_pairs_decompress(const ntfs_volume *vol,
ntfs_error(vol->sb, "Corrupt attribute."); ntfs_error(vol->sb, "Corrupt attribute.");
return ERR_PTR(-EIO); 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. */ /* Current position in runlist array. */
rlpos = 0; rlpos = 0;
/* Allocate first page and set current runlist size to one page. */ /* Allocate first page and set current runlist size to one page. */