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Wed, 19 Feb 2025 21:11:25 +0000 (GMT) From: Nick Child To: netdev@vger.kernel.org Cc: linux-kernel@vger.kernel.org, horms@kernel.org, david.laight.linux@gmail.com, nick.child@ibm.com, pmladek@suse.com, rostedt@goodmis.org, john.ogness@linutronix.de, senozhatsky@chromium.org, Nick Child , Jacob Keller Subject: [PATCH net-next v3 3/3] ibmvnic: Print data buffers with kernel API's Date: Wed, 19 Feb 2025 15:11:02 -0600 Message-ID: <20250219211102.225324-4-nnac123@linux.ibm.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250219211102.225324-1-nnac123@linux.ibm.com> References: <20250219211102.225324-1-nnac123@linux.ibm.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: WSoFnmtVhtjla2_RVZCerOJQNb7IS5wJ X-Proofpoint-GUID: 3nmtspfiKe2M0K31fLuKvpKhiXKqmWRJ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-02-19_09,2025-02-19_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=743 spamscore=0 impostorscore=0 suspectscore=0 mlxscore=0 clxscore=1015 bulkscore=0 adultscore=0 phishscore=0 lowpriorityscore=0 malwarescore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2502100000 definitions=main-2502190158 X-Patchwork-Delegate: kuba@kernel.org Previously, data buffers that were to be printed were cast to 8 byte integers and printed. This can lead to buffer overflow if the length of the buffer is not a multiple of 8. Simplify and safeguard printing by using kernel provided functions to print these data blobs. Signed-off-by: Nick Child Reviewed-by: Jacob Keller --- drivers/net/ethernet/ibm/ibmvnic.c | 23 ++++++++++++++--------- 1 file changed, 14 insertions(+), 9 deletions(-) diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index e95ae0d39948..a8f1feb9a2e7 100644 --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -4834,6 +4834,7 @@ static int send_login(struct ibmvnic_adapter *adapter) struct device *dev = &adapter->vdev->dev; struct vnic_login_client_data *vlcd; dma_addr_t rsp_buffer_token; + unsigned char hex_str[16 * 3]; dma_addr_t buffer_token; size_t rsp_buffer_size; union ibmvnic_crq crq; @@ -4937,9 +4938,9 @@ static int send_login(struct ibmvnic_adapter *adapter) vnic_add_client_data(adapter, vlcd); netdev_dbg(adapter->netdev, "Login Buffer:\n"); - for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) { - netdev_dbg(adapter->netdev, "%016lx\n", - ((unsigned long *)(adapter->login_buf))[i]); + for_each_line_in_hex_dump(i, 16, hex_str, sizeof(hex_str), 8, + adapter->login_buf, adapter->login_buf_sz) { + netdev_dbg(adapter->netdev, "%s\n", hex_str); } memset(&crq, 0, sizeof(crq)); @@ -5317,15 +5318,17 @@ static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter) { struct device *dev = &adapter->vdev->dev; struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf; + unsigned char hex_str[16 * 3]; int i; dma_unmap_single(dev, adapter->ip_offload_tok, sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE); netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n"); - for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++) - netdev_dbg(adapter->netdev, "%016lx\n", - ((unsigned long *)(buf))[i]); + for_each_line_in_hex_dump(i, 16, hex_str, sizeof(hex_str), 8, buf, + sizeof(adapter->ip_offload_buf)) { + netdev_dbg(adapter->netdev, "%s\n", hex_str); + } netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum); netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum); @@ -5518,6 +5521,7 @@ static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, struct net_device *netdev = adapter->netdev; struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf; struct ibmvnic_login_buffer *login = adapter->login_buf; + unsigned char hex_str[16 * 3]; u64 *tx_handle_array; u64 *rx_handle_array; int num_tx_pools; @@ -5556,9 +5560,10 @@ static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq, netdev->mtu = adapter->req_mtu - ETH_HLEN; netdev_dbg(adapter->netdev, "Login Response Buffer:\n"); - for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) { - netdev_dbg(adapter->netdev, "%016lx\n", - ((unsigned long *)(adapter->login_rsp_buf))[i]); + for_each_line_in_hex_dump(i, 16, hex_str, sizeof(hex_str), 8, + adapter->login_rsp_buf, + adapter->login_rsp_buf_sz) { + netdev_dbg(adapter->netdev, "%s\n", hex_str); } /* Sanity checks */