diff options
| author | Tahsin Erdogan <tahsin@google.com> | 2017-05-21 22:32:23 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2017-05-21 22:32:23 -0400 |
| commit | b4709067ac0944e4a5b94eabdc26155c6f2efbd7 (patch) | |
| tree | de9a366b1bdd21eaf01db395ded3681e0c7a79b0 /security/tomoyo | |
| parent | 964edf66bf9ab70cb387b27946c0aef7b94c4d1b (diff) | |
| download | lwn-b4709067ac0944e4a5b94eabdc26155c6f2efbd7.tar.gz lwn-b4709067ac0944e4a5b94eabdc26155c6f2efbd7.zip | |
jbd2: preserve original nofs flag during journal restart
When a transaction starts, start_this_handle() saves current
PF_MEMALLOC_NOFS value so that it can be restored at journal stop time.
Journal restart is a special case that calls start_this_handle() without
stopping the transaction. start_this_handle() isn't aware that the
original value is already stored so it overwrites it with current value.
For instance, a call sequence like below leaves PF_MEMALLOC_NOFS flag set
at the end:
jbd2_journal_start()
jbd2__journal_restart()
jbd2_journal_stop()
Make jbd2__journal_restart() restore the original value before calling
start_this_handle().
Fixes: 81378da64de6 ("jbd2: mark the transaction context with the scope GFP_NOFS context")
Signed-off-by: Tahsin Erdogan <tahsin@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'security/tomoyo')
0 files changed, 0 insertions, 0 deletions