1 files changed, 10 insertions, 3 deletions

diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 17964c0505a9..1db080135c6d 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -174,10 +174,17 @@ static int ocfs2_get_block(struct inode *inode, sector_t iblock,
          * need to use BH_New is when we're extending i_size on a file
          * system which doesn't support holes, in which case BH_New
          * allows block_prepare_write() to zero.
+         *
+         * If we see this on a sparse file system, then a truncate has
+         * raced us and removed the cluster. In this case, we clear
+         * the buffers dirty and uptodate bits and let the buffer code
+         * ignore it as a hole.
          */
-        mlog_bug_on_msg(create && p_blkno == 0 && ocfs2_sparse_alloc(osb),
-                        "ino %lu, iblock %llu\n", inode->i_ino,
-                        (unsigned long long)iblock);
+        if (create && p_blkno == 0 && ocfs2_sparse_alloc(osb)) {
+                clear_buffer_dirty(bh_result);
+                clear_buffer_uptodate(bh_result);
+                goto bail;
+        }
 
         /* Treat the unwritten extent as a hole for zeroing purposes. */
         if (p_blkno && !(ext_flags & OCFS2_EXT_UNWRITTEN))