linux-kernel - [PATCH] cifsd: fix a IS

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Date:   Thu, 18 Mar 2021 16:09:37 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Namjae Jeon <namjae.jeon@...sung.com>
Cc:     Hyunchul Lee <hyc.lee@...il.com>,
        Steve French <stfrench@...rosoft.com>,
        Ronnie Sahlberg <lsahlber@...hat.com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        linux-kernel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: [PATCH] cifsd: fix a IS_ERR() vs NULL bug

The smb_direct_alloc_sendmsg() function never returns NULL, it only
returns error pointers so the check needs to be updated.

Fixes: cabcebc31de4 ("cifsd: introduce SMB3 kernel server")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
 fs/cifsd/transport_rdma.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/cifsd/transport_rdma.c b/fs/cifsd/transport_rdma.c
index 1698f7ed9c2f..638b551019a1 100644
--- a/fs/cifsd/transport_rdma.c
+++ b/fs/cifsd/transport_rdma.c
@@ -997,8 +997,8 @@ static int smb_direct_create_header(struct smb_direct_transport *t,
 	int ret;
 
 	sendmsg = smb_direct_alloc_sendmsg(t);
-	if (!sendmsg)
-		return -ENOMEM;
+	if (IS_ERR(sendmsg))
+		return PTR_ERR(sendmsg);
 
 	/* Fill in the packet header */
 	packet = (struct smb_direct_data_transfer *)sendmsg->packet;
-- 
2.30.2