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authorVitaly Kuznetsov <vkuznets@redhat.com>2015-01-20 16:45:04 +0100
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2015-01-25 18:18:00 +0100
commit9c3a6f7e476fc4961297fc66b1177f9f8c8dd238 (patch)
tree7d6f81136568a5b061b4281d747d16a45ce74a73
parentpcmcia: fix incorrect bracketing on a test (diff)
downloadlinux-9c3a6f7e476fc4961297fc66b1177f9f8c8dd238.tar.xz
linux-9c3a6f7e476fc4961297fc66b1177f9f8c8dd238.zip
Drivers: hv: check vmbus_device_create() return value in vmbus_process_offer()
vmbus_device_create() result is not being checked in vmbus_process_offer() and it can fail if kzalloc() fails. Add the check and do minor cleanup to avoid additional duplication of "free_channel(); return;" block. Reported-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: K. Y. Srinivasan <kys@microsoft.com> Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-rw-r--r--drivers/hv/channel_mgmt.c14
1 files changed, 9 insertions, 5 deletions
diff --git a/drivers/hv/channel_mgmt.c b/drivers/hv/channel_mgmt.c
index 1d7df2576b1c..704c0e00f8d2 100644
--- a/drivers/hv/channel_mgmt.c
+++ b/drivers/hv/channel_mgmt.c
@@ -341,11 +341,10 @@ static void vmbus_process_offer(struct work_struct *work)
if (channel->sc_creation_callback != NULL)
channel->sc_creation_callback(newchannel);
- return;
+ goto out;
}
- free_channel(newchannel);
- return;
+ goto err_free_chan;
}
/*
@@ -364,6 +363,8 @@ static void vmbus_process_offer(struct work_struct *work)
&newchannel->offermsg.offer.if_type,
&newchannel->offermsg.offer.if_instance,
newchannel);
+ if (!newchannel->device_obj)
+ goto err_free_chan;
/*
* Add the new device to the bus. This will kick off device-driver
@@ -379,9 +380,12 @@ static void vmbus_process_offer(struct work_struct *work)
list_del(&newchannel->listentry);
spin_unlock_irqrestore(&vmbus_connection.channel_lock, flags);
kfree(newchannel->device_obj);
-
- free_channel(newchannel);
+ goto err_free_chan;
}
+out:
+ return;
+err_free_chan:
+ free_channel(newchannel);
}
enum {