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2024-05-10 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb

 kernel/drivers/net/ethernet/ibm/ibmvnic.c
..
..
@@ -929,12 +929,22 @@
929
929
 
930
930
 static void release_login_buffer(struct ibmvnic_adapter *adapter)
931
931
 {
932
+	if (!adapter->login_buf)
933
+		return;
934
+
935
+	dma_unmap_single(&adapter->vdev->dev, adapter->login_buf_token,
936
+			 adapter->login_buf_sz, DMA_TO_DEVICE);
932
937
 	kfree(adapter->login_buf);
933
938
 	adapter->login_buf = NULL;
934
939
 }
935
940
 
936
941
 static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
937
942
 {
943
+	if (!adapter->login_rsp_buf)
944
+		return;
945
+
946
+	dma_unmap_single(&adapter->vdev->dev, adapter->login_rsp_buf_token,
947
+			 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
938
948
 	kfree(adapter->login_rsp_buf);
939
949
 	adapter->login_rsp_buf = NULL;
940
950
 }
..
..
@@ -3861,11 +3871,14 @@
3861
3871
 	if (rc) {
3862
3872
 		adapter->login_pending = false;
3863
3873
 		netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc);
3864
-		goto buf_rsp_map_failed;
3874
+		goto buf_send_failed;
3865
3875
 	}
3866
3876
 
3867
3877
 	return 0;
3868
3878
 
3879
+buf_send_failed:
3880
+	dma_unmap_single(dev, rsp_buffer_token, rsp_buffer_size,
3881
+			 DMA_FROM_DEVICE);
3869
3882
 buf_rsp_map_failed:
3870
3883
 	kfree(login_rsp_buffer);
3871
3884
 	adapter->login_rsp_buf = NULL;
..
..
@@ -4430,6 +4443,7 @@
4430
4443
 	int num_tx_pools;
4431
4444
 	int num_rx_pools;
4432
4445
 	u64 *size_array;
4446
+	u32 rsp_len;
4433
4447
 	int i;
4434
4448
 
4435
4449
 	/* CHECK: Test/set of login_pending does not need to be atomic
..
..
@@ -4440,11 +4454,6 @@
4440
4454
 		return 0;
4441
4455
 	}
4442
4456
 	adapter->login_pending = false;
4443
-
4444
-	dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
4445
-			 DMA_TO_DEVICE);
4446
-	dma_unmap_single(dev, adapter->login_rsp_buf_token,
4447
-			 adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
4448
4457
 
4449
4458
 	/* If the number of queues requested can't be allocated by the
4450
4459
 	 * server, the login response will return with code 1. We will need
..
..
@@ -4481,6 +4490,23 @@
4481
4490
 		ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4482
4491
 		return -EIO;
4483
4492
 	}
4493
+
4494
+	rsp_len = be32_to_cpu(login_rsp->len);
4495
+	if (be32_to_cpu(login->login_rsp_len) < rsp_len ||
4496
+	    rsp_len <= be32_to_cpu(login_rsp->off_txsubm_subcrqs) ||
4497
+	    rsp_len <= be32_to_cpu(login_rsp->off_rxadd_subcrqs) ||
4498
+	    rsp_len <= be32_to_cpu(login_rsp->off_rxadd_buff_size) ||
4499
+	    rsp_len <= be32_to_cpu(login_rsp->off_supp_tx_desc)) {
4500
+		/* This can happen if a login request times out and there are
4501
+		 * 2 outstanding login requests sent, the LOGIN_RSP crq
4502
+		 * could have been for the older login request. So we are
4503
+		 * parsing the newer response buffer which may be incomplete
4504
+		 */
4505
+		dev_err(dev, "FATAL: Login rsp offsets/lengths invalid\n");
4506
+		ibmvnic_reset(adapter, VNIC_RESET_FATAL);
4507
+		return -EIO;
4508
+	}
4509
+
4484
4510
 	size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
4485
4511
 		be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
4486
4512
 	/* variable buffer sizes are not supported, so just read the