This is a note to let you know that I've just added the patch titled
ksmbd: fix possible refcount leak in smb2_open()
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ksmbd-fix-possible-refcount-leak-in-smb2_open.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 36deeb861c167214602fc8c4ad0757c94a8e990e
Author: ChenXiaoSong <chenxiaosong2@xxxxxxxxxx>
Date: Thu Mar 2 21:58:04 2023 +0800
ksmbd: fix possible refcount leak in smb2_open()
[ Upstream commit 2624b445544ffc1472ccabfb6ec867c199d4c95c ]
Reference count of acls will leak when memory allocation fails. Fix this
by adding the missing posix_acl_release().
Fixes: e2f34481b24d ("cifsd: add server-side procedures for SMB3")
Signed-off-by: ChenXiaoSong <chenxiaosong2@xxxxxxxxxx>
Acked-by: Namjae Jeon <linkinjeon@xxxxxxxxxx>
Signed-off-by: Steve French <stfrench@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/ksmbd/smb2pdu.c b/fs/ksmbd/smb2pdu.c
index 45e7c854e1d4b..733a3d851e4ce 100644
--- a/fs/ksmbd/smb2pdu.c
+++ b/fs/ksmbd/smb2pdu.c
@@ -2979,8 +2979,11 @@ int smb2_open(struct ksmbd_work *work)
sizeof(struct smb_acl) +
sizeof(struct smb_ace) * ace_num * 2,
GFP_KERNEL);
- if (!pntsd)
+ if (!pntsd) {
+ posix_acl_release(fattr.cf_acls);
+ posix_acl_release(fattr.cf_dacls);
goto err_out;
+ }
rc = build_sec_desc(user_ns,
pntsd, NULL, 0,
