linux-kernel - [PATCH 4.11 27/58] CIFS: Fix some return values in case of error in crypt

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Message-Id: <20170627141114.524921788@linuxfoundation.org>
Date:   Tue, 27 Jun 2017 16:12:30 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Christophe JAILLET <christophe.jaillet@...adoo.fr>,
        Pavel Shilovsky <pshilov@...rosoft.com>,
        Aurelien Aptel <aaptel@...e.com>,
        Steve French <smfrench@...il.com>
Subject: [PATCH 4.11 27/58] CIFS: Fix some return values in case of error in crypt_message

4.11-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Christophe Jaillet <christophe.jaillet@...adoo.fr>

commit 517a6e43c4872c89794af5b377fa085e47345952 upstream.

'rc' is known to be 0 at this point. So if 'init_sg' or 'kzalloc' fails, we
should return -ENOMEM instead.

Also remove a useless 'rc' in a debug message as it is meaningless here.

Fixes: 026e93dc0a3ee ("CIFS: Encrypt SMB3 requests before sending")
Signed-off-by: Christophe JAILLET <christophe.jaillet@...adoo.fr>
Reviewed-by: Pavel Shilovsky <pshilov@...rosoft.com>
Reviewed-by: Aurelien Aptel <aaptel@...e.com>
Signed-off-by: Steve French <smfrench@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 fs/cifs/smb2ops.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1809,7 +1809,8 @@ crypt_message(struct TCP_Server_Info *se
 
 	sg = init_sg(rqst, sign);
 	if (!sg) {
-		cifs_dbg(VFS, "%s: Failed to init sg %d", __func__, rc);
+		cifs_dbg(VFS, "%s: Failed to init sg", __func__);
+		rc = -ENOMEM;
 		goto free_req;
 	}
 
@@ -1817,6 +1818,7 @@ crypt_message(struct TCP_Server_Info *se
 	iv = kzalloc(iv_len, GFP_KERNEL);
 	if (!iv) {
 		cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
+		rc = -ENOMEM;
 		goto free_sg;
 	}
 	iv[0] = 3;