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| author | Jan Kara <jack@suse.cz> | 2005-10-31 00:00:16 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-10-31 02:37:17 +0100 |
| commit | aaa4059bc2dca7fa816624a28db1958c3a22df9b (patch) | |
| tree | 8ae1d5458e2f68f96b033f10dae216847c32d4d2 /fs/reiserfs/xattr_acl.c | |
| parent | [PATCH] smsc-ircc2: PM cleanup - do not close device when suspending (diff) | |
| download | linux-aaa4059bc2dca7fa816624a28db1958c3a22df9b.tar.xz linux-aaa4059bc2dca7fa816624a28db1958c3a22df9b.zip | |
[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 'fs/reiserfs/xattr_acl.c')
0 files changed, 0 insertions, 0 deletions