[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[Qemu-trivial] [PATCH 9/9] hcd-musb: fix dereference null return value
From: |
arei.gonglei |
Subject: |
[Qemu-trivial] [PATCH 9/9] hcd-musb: fix dereference null return value |
Date: |
Sat, 15 Nov 2014 18:06:48 +0800 |
From: Gonglei <address@hidden>
Signed-off-by: Gonglei <address@hidden>
---
hw/usb/hcd-musb.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/hw/usb/hcd-musb.c b/hw/usb/hcd-musb.c
index 66bc61a..f2cb73c 100644
--- a/hw/usb/hcd-musb.c
+++ b/hw/usb/hcd-musb.c
@@ -624,6 +624,10 @@ static void musb_packet(MUSBState *s, MUSBEndPoint *ep,
/* A wild guess on the FADDR semantics... */
dev = usb_find_device(&s->port, ep->faddr[idx]);
+ if (!dev) {
+ TRACE("Do not find an usb device");
+ return;
+ }
uep = usb_ep_get(dev, pid, ep->type[idx] & 0xf);
usb_packet_setup(&ep->packey[dir].p, pid, uep, 0,
(dev->addr << 16) | (uep->nr << 8) | pid, false, true);
--
1.7.12.4