jbd2: don't leak modified metadata buffers on an aborted journal

commit e112666b4959b25a8552d63bc564e1059be703e8 upstream.

If the journal has been aborted, we shouldn't mark the underlying
buffer head as dirty, since that will cause the metadata block to get
modified.  And if the journal has been aborted, we shouldn't allow
this since it will almost certainly lead to a corrupted file system.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>

diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index f18b5352df023dfd6d9517fd42a4f0af705ca908..44e4f024ec532b2135dbad8cd12745f15f0bfd92 100644 (file)
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -1785,7 +1785,9 @@ static void __jbd2_journal_temp_unlink_buffer(struct journal_head *jh)
 
        __blist_del_buffer(list, jh);
        jh->b_jlist = BJ_None;
-       if (test_clear_buffer_jbddirty(bh))
+       if (transaction && is_journal_aborted(transaction->t_journal))
+               clear_buffer_jbddirty(bh);
+       else if (test_clear_buffer_jbddirty(bh))
                mark_buffer_dirty(bh);  /* Expose it to the VM */
 }