From bfda5422a16651d0bf864ec468b1c216e1b10d91 Mon Sep 17 00:00:00 2001
From: ZhangGuoDong <zhangguodong@kylinos.cn>
Date: Sun, 12 Oct 2025 00:47:59 +0800
Subject: [PATCH] smb/server: fix possible memory leak in smb2_read()

[ Upstream commit 6fced056d2cc8d01b326e6fcfabaacb9850b71a4 ]

Memory leak occurs when ksmbd_vfs_read() fails.
Fix this by adding the missing kvfree().

Co-developed-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Signed-off-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Signed-off-by: ZhangGuoDong <zhangguodong@kylinos.cn>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 fs/smb/server/smb2pdu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c
index 287200d7c076..409b85af82e1 100644
--- a/fs/smb/server/smb2pdu.c
+++ b/fs/smb/server/smb2pdu.c
@@ -6826,6 +6826,7 @@ int smb2_read(struct ksmbd_work *work)
 
 	nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf);
 	if (nbytes < 0) {
+		kvfree(aux_payload_buf);
 		err = nbytes;
 		goto out;
 	}