linux-kernel - [PATCH] smb: server: Use common error handling code in smb_direct_rdma

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [day] [month] [year] [list]

Message-ID: <7f956b3b-853b-4150-b2e0-ccd430adf9ac@web.de>
Date: Wed, 1 Oct 2025 21:25:15 +0200
From: Markus Elfring <Markus.Elfring@....de>
To: linux-cifs@...r.kernel.org, Hyunchul Lee <hyc.lee@...il.com>,
 Namjae Jeon <linkinjeon@...nel.org>,
 Sergey Senozhatsky <senozhatsky@...omium.org>,
 Steve French <smfrench@...il.com>, Tom Talpey <tom@...pey.com>
Cc: LKML <linux-kernel@...r.kernel.org>, kernel-janitors@...r.kernel.org,
 Stefan Metzmacher <metze@...ba.org>
Subject: [PATCH] smb: server: Use common error handling code in
 smb_direct_rdma_xmit()

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Wed, 1 Oct 2025 21:09:00 +0200

Add two jump targets so that a bit of exception handling can be better
reused at the end of this function implementation.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 fs/smb/server/transport_rdma.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/fs/smb/server/transport_rdma.c b/fs/smb/server/transport_rdma.c
index b3077766d6ec..a201c5871a77 100644
--- a/fs/smb/server/transport_rdma.c
+++ b/fs/smb/server/transport_rdma.c
@@ -1574,18 +1574,14 @@ static int smb_direct_rdma_xmit(struct smb_direct_transport *t,
 					     get_buf_page_count(desc_buf, desc_buf_len),
 					     msg->sg_list, SG_CHUNK_SIZE);
 		if (ret) {
-			kfree(msg);
 			ret = -ENOMEM;
-			goto out;
+			goto free_msg;
 		}
 
 		ret = get_sg_list(desc_buf, desc_buf_len,
 				  msg->sgt.sgl, msg->sgt.orig_nents);
-		if (ret < 0) {
-			sg_free_table_chained(&msg->sgt, SG_CHUNK_SIZE);
-			kfree(msg);
-			goto out;
-		}
+		if (ret < 0)
+			goto free_table;
 
 		ret = rdma_rw_ctx_init(&msg->rdma_ctx, sc->ib.qp, sc->ib.qp->port,
 				       msg->sgt.sgl,
@@ -1596,9 +1592,7 @@ static int smb_direct_rdma_xmit(struct smb_direct_transport *t,
 				       is_read ? DMA_FROM_DEVICE : DMA_TO_DEVICE);
 		if (ret < 0) {
 			pr_err("failed to init rdma_rw_ctx: %d\n", ret);
-			sg_free_table_chained(&msg->sgt, SG_CHUNK_SIZE);
-			kfree(msg);
-			goto out;
+			goto free_table;
 		}
 
 		list_add_tail(&msg->list, &msg_list);
@@ -1630,6 +1624,12 @@ static int smb_direct_rdma_xmit(struct smb_direct_transport *t,
 	atomic_add(credits_needed, &sc->rw_io.credits.count);
 	wake_up(&sc->rw_io.credits.wait_queue);
 	return ret;
+
+free_table:
+	sg_free_table_chained(&msg->sgt, SG_CHUNK_SIZE);
+free_msg:
+	kfree(msg);
+	goto out;
 }
 
 static int smb_direct_rdma_write(struct ksmbd_transport *t,
-- 
2.51.0