diff options
author | Jan Kara <jack@suse.cz> | 2009-12-01 10:53:06 -0500 |
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committer | Jan Kara <jack@suse.cz> | 2009-12-10 09:02:55 -0500 |
commit | 68eb3db08344286733adac48304d9fb7a0e53b27 (patch) | |
tree | 214133860fdb6ceac4adbeb621837df8c494f1fb /drivers/uwb/uwbd.c | |
parent | 5a20bdfcdc5c5e5f0647d8d99a998066ef5496ac (diff) |
ext3: Fix data / filesystem corruption when write fails to copy data
When ext3_write_begin fails after allocating some blocks or
generic_perform_write fails to copy data to write, we truncate blocks already
instantiated beyond i_size. Although these blocks were never inside i_size, we
have to truncate pagecache of these blocks so that corresponding buffers get
unmapped. Otherwise subsequent __block_prepare_write (called because we are
retrying the write) will find the buffers mapped, not call ->get_block, and
thus the page will be backed by already freed blocks leading to filesystem and
data corruption.
Reported-by: James Y Knight <foom@fuhm.net>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'drivers/uwb/uwbd.c')
0 files changed, 0 insertions, 0 deletions