jbd2: avoid infinite loop when destroying aborted journal
Commit 6f6a6fda2945 "jbd2: fix ocfs2 corrupt when updating journal
superblock fails" changed jbd2_cleanup_journal_tail() to return EIO
when the journal is aborted. That makes logic in
jbd2_log_do_checkpoint() bail out which is fine, except that
jbd2_journal_destroy() expects jbd2_log_do_checkpoint() to always make
a progress in cleaning the journal. Without it jbd2_journal_destroy()
just loops in an infinite loop.
Fix jbd2_journal_destroy() to cleanup journal checkpoint lists of
jbd2_log_do_checkpoint() fails with error.
Reported-by: Eryu Guan <guaneryu@gmail.com>
Tested-by: Eryu Guan <guaneryu@gmail.com>
Fixes: 6f6a6fda294506dfe0e3e0a253bb2d2923f28f0a
Signed-off-by: Jan Kara <jack@suse.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index fe1b4bd..8270fe9 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -1693,8 +1693,17 @@
while (journal->j_checkpoint_transactions != NULL) {
spin_unlock(&journal->j_list_lock);
mutex_lock(&journal->j_checkpoint_mutex);
- jbd2_log_do_checkpoint(journal);
+ err = jbd2_log_do_checkpoint(journal);
mutex_unlock(&journal->j_checkpoint_mutex);
+ /*
+ * If checkpointing failed, just free the buffers to avoid
+ * looping forever
+ */
+ if (err) {
+ jbd2_journal_destroy_checkpoint(journal);
+ spin_lock(&journal->j_list_lock);
+ break;
+ }
spin_lock(&journal->j_list_lock);
}