releases/2.6.31.8/0076-jbd2-Add-ENOMEM-checking-in-and-for-jbd2_journal_wri.patch

From fa1b33dd4ff545b7bfd10eac8b0833d338135306 Mon Sep 17 00:00:00 2001
From: Theodore Ts'o <tytso@mit.edu>
Date: Tue, 1 Dec 2009 09:04:42 -0500
Subject: [PATCH 76/85] jbd2: Add ENOMEM checking in and for jbd2_journal_write_metadata_buffer()

(cherry picked from commit e6ec116b67f46e0e7808276476554727b2e6240b)

OOM happens.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
---
 fs/jbd2/commit.c  |    4 ++++
 fs/jbd2/journal.c |    4 ++++
 2 files changed, 8 insertions(+)

--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -636,6 +636,10 @@ void jbd2_journal_commit_transaction(jou
 		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);
 
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -361,6 +361,10 @@ 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);