patch "vmbus: don't return values for uninitalized channels" added to char-misc-linus

This is a note to let you know that I've just added the patch titled

vmbus: don't return values for uninitalized channels

to my char-misc git tree which can be found at
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git
in the char-misc-linus branch.

The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)

The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.

If you have any questions about this process, please let me know.

From: Stephen Hemminger <[email protected]>
Date: Mon, 20 Aug 2018 21:16:40 +0000
Subject: vmbus: don't return values for uninitalized channels

For unsupported device types, the vmbus channel ringbuffer is never initialized, and therefore reading the sysfs files will return garbage or cause a kernel OOPS.

---
 drivers/hv/vmbus_drv.c | 3 +++
 1 file changed, 3 insertions(+)

index b1b548a21f91..c71cc857b649 100644
@@ -1291,6 +1291,9 @@ static ssize_t vmbus_chan_attr_show(struct kobject *kobj,
 	if (!attribute->show)
 		return -EIO;
 
+	if (chan->state != CHANNEL_OPENED_STATE)
+		return -EINVAL;
+
 	return attribute->show(chan, buf);
 }
 

2.18.0