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author | Theodore Ts'o <tytso@mit.edu> | 2009-11-23 07:17:34 -0500 |
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committer | Theodore Ts'o <tytso@mit.edu> | 2009-11-23 07:17:34 -0500 |
commit | 50689696867d95b38d9c7be640a311494a04fb86 (patch) | |
tree | 69e582bb6c95d8d0ac59bcad97b5f7f1d79e7126 /kernel/sys.c | |
parent | beac2da7565e42be59963824899825d0cc624295 (diff) |
ext4: make sure directory and symlink blocks are revoked
When an inode gets unlinked, the functions ext4_clear_blocks() and
ext4_remove_blocks() call ext4_forget() for all the buffer heads
corresponding to the deleted inode's data blocks. If the inode is a
directory or a symlink, the is_metadata parameter must be non-zero so
ext4_forget() will revoke them via jbd2_journal_revoke(). Otherwise,
if these blocks are reused for a data file, and the system crashes
before a journal checkpoint, the journal replay could end up
corrupting these data blocks.
Thanks to Curt Wohlgemuth for pointing out potential problems in this
area.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: stable@kernel.org
Diffstat (limited to 'kernel/sys.c')
0 files changed, 0 insertions, 0 deletions