jbd2: Add ENOMEM checking in and for jbd2_journal_write_metadata_buffer()

OOM happens.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

2 files changed, 8 insertions, 0 deletions

diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index d4cfd6d2779e..8896c1d4febe 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -636,6 +636,10 @@ void jbd2_journal_commit_transaction(journal_t *journal)
                 JBUFFER_TRACE(jh, "ph3: write metadata");
                 flags = jbd2_journal_write_metadata_buffer(commit_transaction,
                                                       jh, &new_jh, blocknr);
+                if (flags < 0) {
+                        jbd2_journal_abort(journal, flags);
+                        continue;
+                }
                 set_bit(BH_JWrite, &jh2bh(new_jh)->b_state);
                 wbuf[bufs++] = jh2bh(new_jh);
 
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index af60d98ddd22..3f473faa4660 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -358,6 +358,10 @@ repeat:
 
                 jbd_unlock_bh_state(bh_in);
                 tmp = jbd2_alloc(bh_in->b_size, GFP_NOFS);
+                if (!tmp) {
+                        jbd2_journal_put_journal_head(new_jh);
+                        return -ENOMEM;
+                }
                 jbd_lock_bh_state(bh_in);
                 if (jh_in->b_frozen_data) {
                         jbd2_free(tmp, bh_in->b_size);