Anton Altaparmakov af5eb745ef NTFS: Fix invalid pointer dereference in ntfs_mft_record_alloc().
In ntfs_mft_record_alloc() when mapping the new extent mft record with
map_extent_mft_record() we overwrite @m with the return value and on
error, we then try to use the old @m but that is no longer there as @m
now contains an error code instead so we crash when dereferencing the
error code as if it were a pointer.

The simple fix is to use a temporary variable to store the return value
thus preserving the original @m for later use.  This is a backport from
the commercial Tuxera-NTFS driver and is well tested...

Thanks go to Julia Lawall for pointing this out (whilst I had fixed it
in the commercial driver I had failed to fix it in the Linux kernel).

Signed-off-by: Anton Altaparmakov <anton@tuxera.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-01-31 12:58:11 +10:00
..
2011-01-12 20:03:43 -05:00
2011-01-12 20:02:45 -05:00
2011-01-12 20:03:42 -05:00
2011-01-07 17:50:26 +11:00
2011-01-27 19:58:13 +00:00
2011-01-16 21:22:37 +00:00
2011-01-07 17:50:26 +11:00
2011-01-07 17:50:26 +11:00
2011-01-07 17:50:26 +11:00
2011-01-14 09:23:36 -08:00
2011-01-12 20:02:44 -05:00
2011-01-12 20:02:45 -05:00
2011-01-12 20:02:45 -05:00
2011-01-12 20:03:42 -05:00
2011-01-07 17:50:26 +11:00
2011-01-07 17:50:26 +11:00
2011-01-12 20:02:43 -05:00
2011-01-12 20:02:44 -05:00
2011-01-07 17:50:26 +11:00
2011-01-07 17:50:26 +11:00
2011-01-07 17:50:26 +11:00
2011-01-12 20:02:44 -05:00
2011-01-07 17:50:26 +11:00
2011-01-07 17:50:26 +11:00
2011-01-17 12:39:07 -08:00
2011-01-13 08:03:12 -08:00
2011-01-07 17:50:27 +11:00
2011-01-17 01:47:59 -05:00
2011-01-13 17:32:32 -08:00
2011-01-17 01:47:59 -05:00
2011-01-17 02:25:31 -05:00
2011-01-07 17:50:33 +11:00
2011-01-16 13:47:07 -05:00