diff options
author | Jan Kara <jack@suse.cz> | 2005-10-31 02:00:16 +0300 |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-10-31 04:37:17 +0300 |
commit | aaa4059bc2dca7fa816624a28db1958c3a22df9b (patch) | |
tree | 8ae1d5458e2f68f96b033f10dae216847c32d4d2 /init | |
parent | e812cb5226af32aec91bcbaa8365bd7f921b6ebb (diff) | |
download | linux-aaa4059bc2dca7fa816624a28db1958c3a22df9b.tar.xz |
[PATCH] ext3: Fix unmapped buffers in transaction's lists
Fix the problem (BUG 4964) with unmapped buffers in transaction's
t_sync_data list. The problem is we need to call filesystem's own
invalidatepage() from block_write_full_page().
block_write_full_page() must call filesystem's invalidatepage(). Otherwise
following nasty race can happen:
proc 1 proc 2
------ ------
- write some new data to 'offset'
=> bh gets to the transactions data list
- starts truncate
=> i_size set to new size
- mpage_writepages()
- ext3_ordered_writepage() to 'offset'
- block_write_full_page()
- page->index > end_index+1
- block_invalidatepage()
- discard_buffer()
- clear_buffer_mapped()
- commit triggers and finds unmapped buffer - BOOM!
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'init')
0 files changed, 0 insertions, 0 deletions