USB: rndis_host: fix crash while probing a Nokia S60 mobile
Bug fix for driver rndis_host which fixes rndis_host probing certain
Nokia S60 (Series 60) mobiles. While the rndis_host get probed by usbnet
and tries to bind the Nokia mobile the bind is going to fail. The
rndis_host module tries to release the device, in a wrong way, which
cause the oops.
Fixes Bugzilla #7201
Signed-off-by: Daniel Gollub <dgollub@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/net/rndis_host.c b/drivers/usb/net/rndis_host.c
index ea5f44d..a322a16 100644
--- a/drivers/usb/net/rndis_host.c
+++ b/drivers/usb/net/rndis_host.c
@@ -379,6 +379,7 @@
{
int retval;
struct net_device *net = dev->net;
+ struct cdc_state *info = (void *) &dev->data;
union {
void *buf;
struct rndis_msg_hdr *header;
@@ -397,7 +398,7 @@
return -ENOMEM;
retval = usbnet_generic_cdc_bind(dev, intf);
if (retval < 0)
- goto done;
+ goto fail;
net->hard_header_len += sizeof (struct rndis_data_hdr);
@@ -412,10 +413,7 @@
if (unlikely(retval < 0)) {
/* it might not even be an RNDIS device!! */
dev_err(&intf->dev, "RNDIS init failed, %d\n", retval);
-fail:
- usb_driver_release_interface(driver_of(intf),
- ((struct cdc_state *)&(dev->data))->data);
- goto done;
+ goto fail_and_release;
}
dev->hard_mtu = le32_to_cpu(u.init_c->max_transfer_size);
/* REVISIT: peripheral "alignment" request is ignored ... */
@@ -431,7 +429,7 @@
retval = rndis_command(dev, u.header);
if (unlikely(retval < 0)) {
dev_err(&intf->dev, "rndis get ethaddr, %d\n", retval);
- goto fail;
+ goto fail_and_release;
}
tmp = le32_to_cpu(u.get_c->offset);
if (unlikely((tmp + 8) > (1024 - ETH_ALEN)
@@ -439,7 +437,7 @@
dev_err(&intf->dev, "rndis ethaddr off %d len %d ?\n",
tmp, le32_to_cpu(u.get_c->len));
retval = -EDOM;
- goto fail;
+ goto fail_and_release;
}
memcpy(net->dev_addr, tmp + (char *)&u.get_c->request_id, ETH_ALEN);
@@ -455,11 +453,18 @@
retval = rndis_command(dev, u.header);
if (unlikely(retval < 0)) {
dev_err(&intf->dev, "rndis set packet filter, %d\n", retval);
- goto fail;
+ goto fail_and_release;
}
retval = 0;
-done:
+
+ kfree(u.buf);
+ return retval;
+
+fail_and_release:
+ usb_set_intfdata(info->data, NULL);
+ usb_driver_release_interface(driver_of(intf), info->data);
+fail:
kfree(u.buf);
return retval;
}
