[PATCH 5.14 352/432] cifs: fix wrong release in sess_alloc_buffer() failed path

From: Greg Kroah-Hartman
Date: Thu Sep 16 2021 - 13:52:03 EST


From: Ding Hui <dinghui@xxxxxxxxxxxxxx>

[ Upstream commit d72c74197b70bc3c95152f351a568007bffa3e11 ]

smb_buf is allocated by small_smb_init_no_tc(), and buf type is
CIFS_SMALL_BUFFER, so we should use cifs_small_buf_release() to
release it in failed path.

Signed-off-by: Ding Hui <dinghui@xxxxxxxxxxxxxx>
Reviewed-by: Paulo Alcantara (SUSE) <pc@xxxxxx>
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
fs/cifs/sess.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/cifs/sess.c b/fs/cifs/sess.c
index c5785fd3f52e..606fd7d6cb71 100644
--- a/fs/cifs/sess.c
+++ b/fs/cifs/sess.c
@@ -877,7 +877,7 @@ sess_alloc_buffer(struct sess_data *sess_data, int wct)
return 0;

out_free_smb_buf:
- kfree(smb_buf);
+ cifs_small_buf_release(smb_buf);
sess_data->iov[0].iov_base = NULL;
sess_data->iov[0].iov_len = 0;
sess_data->buf0_type = CIFS_NO_BUFFER;
--
2.30.2