linux-hardened/fs/jbd2
dingdinghua 96577c4382 jbd2: fix race between write_metadata_buffer and get_write_access
The function jbd2_journal_write_metadata_buffer() calls
jbd_unlock_bh_state(bh_in) too early; this could potentially allow
another thread to call get_write_access on the buffer head, modify the
data, and dirty it, and allowing the wrong data to be written into the
journal.  Fortunately, if we lose this race, the only time this will
actually cause filesystem corruption is if there is a system crash or
other unclean shutdown of the system before the next commit can take
place.

Signed-off-by: dingdinghua <dingdinghua85@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-07-13 17:55:35 -04:00
..
checkpoint.c jbd2: convert instrumentation from markers to tracepoints 2009-06-17 11:47:48 -04:00
commit.c jbd2: convert instrumentation from markers to tracepoints 2009-06-17 11:47:48 -04:00
journal.c jbd2: fix race between write_metadata_buffer and get_write_access 2009-07-13 17:55:35 -04:00
Kconfig fs/Kconfig: move ext2, ext3, ext4, JBD, JBD2 out 2008-10-20 11:43:59 -07:00
Makefile [PATCH] jbd2: rename jbd2 symbols to avoid duplication of jbd symbols 2006-10-11 11:14:15 -07:00
recovery.c jbd2: fix error handling for checkpoint io 2008-10-10 20:29:13 -04:00
revoke.c jbd2: use SWRITE_SYNC_PLUG when writing synchronous revoke records 2009-04-14 07:50:56 -04:00
transaction.c jbd2: Fix a race between checkpointing code and journal_get_write_access() 2009-07-13 16:16:20 -04:00