--- zzzz-none-000/linux-2.6.39.4/block/scsi_ioctl.c	2011-08-03 19:43:28.000000000 +0000
+++ puma6-atom-6490-729/linux-2.6.39.4/block/scsi_ioctl.c	2021-11-10 13:38:14.000000000 +0000
@@ -457,6 +457,11 @@
 	}
 
 	rq = blk_get_request(q, in_len ? WRITE : READ, __GFP_WAIT);
+	/*== 20161124 AVM/WKR don't access empty rq ==*/
+	if (unlikely(!rq)) {
+		kfree (buffer);
+		return -EFAULT;
+	}
 
 	cmdlen = COMMAND_SIZE(opcode);
 
@@ -543,6 +548,11 @@
 	int err;
 
 	rq = blk_get_request(q, WRITE, __GFP_WAIT);
+	/*== 20161124 AVM/WKR don't access empty rq ==*/
+	if (unlikely(!rq)) {
+		return -EFAULT;
+	}
+
 	rq->cmd_type = REQ_TYPE_BLOCK_PC;
 	rq->timeout = BLK_DEFAULT_SG_TIMEOUT;
 	rq->cmd[0] = cmd;