[dm-devel] [PATCH] dm.c : Check memory allocations

[Kevin Corry <corry ecn purdue edu>]

Check memory allocations when cloning bio's.

--- linux-2.5.53a/drivers/md/dm.c	Mon Dec 23 23:21:04 2002
+++ linux-2.5.53b/drivers/md/dm.c	Fri Dec 27 14:50:29 2002
@@ -394,6 +393,10 @@
 		 */
 		clone = clone_bio(bio, ci->sector, ci->idx,
 				  bio->bi_vcnt - ci->idx, ci->sector_count);
+		if (!clone) {
+			dec_pending(ci->io, -ENOMEM);
+			return;
+		}
 		__map_bio(ti, clone, ci->io);
 		ci->sector_count = 0;
 
@@ -417,6 +420,10 @@
 		}
 
 		clone = clone_bio(bio, ci->sector, ci->idx, i - ci->idx, len);
+		if (!clone) {
+			dec_pending(ci->io, -ENOMEM);
+			return;
+		}
 		__map_bio(ti, clone, ci->io);
 
 		ci->sector += len;