linux-kernel - [PATCH 4.19 102/118] can: kvaser_usb: Fix potential uninitialized variable use

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20181126105105.792853190@linuxfoundation.org>
Date:   Mon, 26 Nov 2018 11:51:36 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Jimmy Assarsson <jimmyassarsson@...il.com>,
        Marc Kleine-Budde <mkl@...gutronix.de>
Subject: [PATCH 4.19 102/118] can: kvaser_usb: Fix potential uninitialized variable use

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

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

From: Jimmy Assarsson <jimmyassarsson@...il.com>

commit 95217260649aa504eb5d4a0d50959ca4e67c8f96 upstream.

If alloc_can_err_skb() fails, cf is never initialized.
Move assignment of cf inside check.

Reported-by: Dan Carpenter <dan.carpenter@...cle.com>
Signed-off-by: Jimmy Assarsson <jimmyassarsson@...il.com>
Cc: linux-stable <stable@...r.kernel.org>
Signed-off-by: Marc Kleine-Budde <mkl@...gutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c |   10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

--- a/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c
+++ b/drivers/net/can/usb/kvaser_usb/kvaser_usb_hydra.c
@@ -1019,6 +1019,11 @@ kvaser_usb_hydra_error_frame(struct kvas
 					new_state : CAN_STATE_ERROR_ACTIVE;
 
 			can_change_state(netdev, cf, tx_state, rx_state);
+
+			if (priv->can.restart_ms &&
+			    old_state >= CAN_STATE_BUS_OFF &&
+			    new_state < CAN_STATE_BUS_OFF)
+				cf->can_id |= CAN_ERR_RESTARTED;
 		}
 
 		if (new_state == CAN_STATE_BUS_OFF) {
@@ -1028,11 +1033,6 @@ kvaser_usb_hydra_error_frame(struct kvas
 
 			can_bus_off(netdev);
 		}
-
-		if (priv->can.restart_ms &&
-		    old_state >= CAN_STATE_BUS_OFF &&
-		    new_state < CAN_STATE_BUS_OFF)
-			cf->can_id |= CAN_ERR_RESTARTED;
 	}
 
 	if (!skb) {