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| author | Anton Altaparmakov <anton@tuxera.com> | 2011-01-28 20:45:28 +0000 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-31 12:58:11 +1000 |
| commit | af5eb745efe97d91d2cbe793029838b3311c15da (patch) | |
| tree | c2e410318a3f38928255ebf9ab18332b871e17f0 /kernel/sched_autogroup.c | |
| parent | 9fbf0c08d441888b977f7c459c8aa57f2c0cb6ad (diff) | |
| download | linux-stable-af5eb745efe97d91d2cbe793029838b3311c15da.tar.gz linux-stable-af5eb745efe97d91d2cbe793029838b3311c15da.tar.bz2 linux-stable-af5eb745efe97d91d2cbe793029838b3311c15da.zip | |
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>
Diffstat (limited to 'kernel/sched_autogroup.c')
0 files changed, 0 insertions, 0 deletions