From: Johan Hovold johan@kernel.org
commit 39a4281c312f2d226c710bc656ce380c621a2b16 upstream.
Make sure to use the current alternate setting when verifying the interface descriptors to avoid binding to an invalid interface.
Failing to do so could cause the driver to misbehave or trigger a WARN() in usb_submit_urb() that kernels with panic_on_warn set would choke on.
Fixes: 26f1fad29ad9 ("New driver: rtl8xxxu (mac80211)") Cc: stable stable@vger.kernel.org # 4.4 Cc: Jes Sorensen Jes.Sorensen@redhat.com Signed-off-by: Johan Hovold johan@kernel.org Signed-off-by: Kalle Valo kvalo@codeaurora.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c +++ b/drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c @@ -6384,7 +6384,7 @@ static int rtl8xxxu_parse_usb(struct rtl u8 dir, xtype, num; int ret = 0;
- host_interface = &interface->altsetting[0]; + host_interface = interface->cur_altsetting; interface_desc = &host_interface->desc; endpoints = interface_desc->bNumEndpoints;