ext4: Add error checking to kmem_cache_alloc() call in ext4_free_blocks()

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

1 files changed, 5 insertions, 1 deletions

diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 731b6f738a03..46d5414f59c1 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -4626,7 +4626,11 @@ do_more:
                  * blocks being freed are metadata. these blocks shouldn't
                  * be used until this transaction is committed
                  */
-                new_entry  = kmem_cache_alloc(ext4_free_ext_cachep, GFP_NOFS);
+                new_entry = kmem_cache_alloc(ext4_free_ext_cachep, GFP_NOFS);
+                if (!new_entry) {
+                        err = -ENOMEM;
+                        goto error_return;
+                }
                 new_entry->start_blk = bit;
                 new_entry->group  = block_group;
                 new_entry->count = count;