Patch "ath9k_htc: fix NULL-deref at probe" has been added to the 4.4-stable tree

Patch "ath9k_htc: fix NULL-deref at probe" has been added to the 4.4-stable tree

[gregkh]

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

    ath9k_htc: fix NULL-deref at probe

to the 4.4-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:
     ath9k_htc-fix-null-deref-at-probe.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From ebeb36670ecac36c179b5fb5d5c88ff03ba191ec Mon Sep 17 00:00:00 2001
From: Johan Hovold <johan@kernel.org>
Date: Mon, 13 Mar 2017 13:44:20 +0100
Subject: ath9k_htc: fix NULL-deref at probe

From: Johan Hovold <johan@kernel.org>

commit ebeb36670ecac36c179b5fb5d5c88ff03ba191ec upstream.

Make sure to check the number of endpoints to avoid dereferencing a
NULL-pointer or accessing memory beyond the endpoint array should a
malicious device lack the expected endpoints.

Fixes: 36bcce430657 ("ath9k_htc: Handle storage devices")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/net/wireless/ath/ath9k/hif_usb.c |    3 +++
 1 file changed, 3 insertions(+)

--- a/drivers/net/wireless/ath/ath9k/hif_usb.c
+++ b/drivers/net/wireless/ath/ath9k/hif_usb.c
@@ -1217,6 +1217,9 @@ static int send_eject_command(struct usb
 	u8 bulk_out_ep;
 	int r;
 
+	if (iface_desc->desc.bNumEndpoints < 2)
+		return -ENODEV;
+
 	/* Find bulk out endpoint */
 	for (r = 1; r >= 0; r--) {
 		endpoint = &iface_desc->endpoint[r].desc;


Patches currently in stable-queue which might be from johan@kernel.org are

queue-4.4/watchdog-pcwd_usb-fix-null-deref-at-probe.patch
queue-4.4/ath9k_htc-fix-null-deref-at-probe.patch