ksmbd: fix refcount leak causing resource not released

commit 89bb430 upstream.

When ksmbd_conn_releasing(opinfo->conn) returns true,the refcount was not
decremented properly, causing a refcount leak that prevents the count from
reaching zero and the memory from being released.

Cc: stable@vger.kernel.org
Signed-off-by: Ziyan Xu <ziyan@securitygossip.com>
Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: Z1naX5

fs/smb/server/oplock.c

@@ -1102,8 +1102,10 @@ void smb_send_parent_lease_break_noti(struct ksmbd_file *fp,
 			if (!atomic_inc_not_zero(&opinfo->refcount))
 				continue;
 
-			if (ksmbd_conn_releasing(opinfo->conn))
+			if (ksmbd_conn_releasing(opinfo->conn)) {
+				opinfo_put(opinfo);
 				continue;
+			}
 
 			oplock_break(opinfo, SMB2_OPLOCK_LEVEL_NONE, NULL);
 			opinfo_put(opinfo);
@@ -1139,8 +1141,11 @@ void smb_lazy_parent_lease_break_close(struct ksmbd_file *fp)
 			if (!atomic_inc_not_zero(&opinfo->refcount))
 				continue;
 
-			if (ksmbd_conn_releasing(opinfo->conn))
+			if (ksmbd_conn_releasing(opinfo->conn)) {
+				opinfo_put(opinfo);
 				continue;
+			}
+
 			oplock_break(opinfo, SMB2_OPLOCK_LEVEL_NONE, NULL);
 			opinfo_put(opinfo);
 		}
@@ -1343,8 +1348,10 @@ void smb_break_all_levII_oplock(struct ksmbd_work *work, struct ksmbd_file *fp,
 		if (!atomic_inc_not_zero(&brk_op->refcount))
 			continue;
 
-		if (ksmbd_conn_releasing(brk_op->conn))
+		if (ksmbd_conn_releasing(brk_op->conn)) {
+			opinfo_put(brk_op);
 			continue;
+		}
 
 		if (brk_op->is_lease && (brk_op->o_lease->state &
 		    (~(SMB2_LEASE_READ_CACHING_LE |