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ath9k_htc: fix NULL-deref at probe

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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: 36bcce4306 ("ath9k_htc: Handle storage devices")
Cc: stable <stable@vger.kernel.org>     # 2.6.39+
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Johan Hovold 2017-03-13 13:44:20 +01:00 committed by Kalle Valo
parent a7595a820b
commit ebeb36670e
1 changed files with 3 additions and 0 deletions
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3
drivers/net/wireless/ath/ath9k/hif_usb.c
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@ -1220,6 +1220,9 @@ static int send_eject_command(struct usb_interface *interface)
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;