Patch "usbip: fix stub_send_ret_submit() vulnerability to null transfer_buffer" has been added to the 3.18-stable tree

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

usbip: fix stub_send_ret_submit() vulnerability to null transfer_buffer

to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
usbip-fix-stub_send_ret_submit-vulnerability-to-null-transfer_buffer.patch
and it can be found in the queue-3.18 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Shuah Khan <[email protected]>
Date: Thu, 7 Dec 2017 14:16:50 -0700
Subject: usbip: fix stub_send_ret_submit() vulnerability to null transfer_buffer

From: Shuah Khan <[email protected]>

commit be6123df1ea8f01ee2f896a16c2b7be3e4557a5a upstream.

stub_send_ret_submit() handles urb with a potential null transfer_buffer, when it replays a packet with potential malicious data that could contain a null buffer. Add a check for the condition when actual_length > 0 and transfer_buffer is null.

---
 drivers/usb/usbip/stub_tx.c |    7 +++++++
 1 file changed, 7 insertions(+)

@@ -178,6 +178,13 @@ static int stub_send_ret_submit(struct s
 		memset(&pdu_header, 0, sizeof(pdu_header));
 		memset(&msg, 0, sizeof(msg));
 
+		if (urb->actual_length > 0 && !urb->transfer_buffer) {
+			dev_err(&sdev->udev->dev,
+				"urb: actual_length %d transfer_buffer null\n",
+				urb->actual_length);
+			return -1;
+		}
+
 		if (usb_pipetype(urb->pipe) == PIPE_ISOCHRONOUS)
 			iovnum = 2 + urb->number_of_packets;
 		else

Patches currently in stable-queue which might be from [email protected] are

queue-3.18/usbip-fix-stub_send_ret_submit-vulnerability-to-null-transfer_buffer.patch