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authorWei Yongjun <yongjun_wei@trendmicro.com.cn>2013-04-19 06:18:12 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2013-04-19 21:20:41 +0400
commitc33c888b585fd9ed3770e91588480a0b74e82ad0 (patch)
tree7a46c66816268c99a4fb459b9e347aa6e81bbc56 /drivers/usb/atm
parent1cb6e73c556e8a61d41e531003cf205c16650a02 (diff)
downloadlinux-c33c888b585fd9ed3770e91588480a0b74e82ad0.tar.xz
usbatm: fix potential NULL pointer dereference
The dereference to 'instance' in the debug code should be moved below the NULL test. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Duncan Sands <baldrick@free.fr> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/atm')
-rw-r--r--drivers/usb/atm/usbatm.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/usb/atm/usbatm.c b/drivers/usb/atm/usbatm.c
index 35f10bfe15db..d3527dd8b90c 100644
--- a/drivers/usb/atm/usbatm.c
+++ b/drivers/usb/atm/usbatm.c
@@ -672,9 +672,6 @@ static int usbatm_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
struct usbatm_control *ctrl = UDSL_SKB(skb);
int err;
- vdbg(&instance->usb_intf->dev, "%s called (skb 0x%p, len %u)", __func__,
- skb, skb->len);
-
/* racy disconnection check - fine */
if (!instance || instance->disconnected) {
#ifdef DEBUG
@@ -684,6 +681,9 @@ static int usbatm_atm_send(struct atm_vcc *vcc, struct sk_buff *skb)
goto fail;
}
+ vdbg(&instance->usb_intf->dev, "%s called (skb 0x%p, len %u)", __func__,
+ skb, skb->len);
+
if (vcc->qos.aal != ATM_AAL5) {
atm_rldbg(instance, "%s: unsupported ATM type %d!\n", __func__, vcc->qos.aal);
err = -EINVAL;