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staging: rtl8188eu: fix interface sanity check

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commit 74ca34118a 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: c2478d3907 ("staging: r8188eu: Add files for new driver - part 20")
Cc: stable <stable@vger.kernel.org>     # 3.12
Signed-off-by: Johan Hovold <johan@kernel.org>
Link: https://lore.kernel.org/r/20191210114751.5119-2-johan@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johan Hovold
2019-12-10 12:47:50 +01:00
committed by Greg Kroah-Hartman
parent 6a80ee6afc
commit cc2f97548d
1 changed files with 1 additions and 1 deletions
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2
drivers/staging/rtl8188eu/os_dep/usb_intf.c
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@@ -78,7 +78,7 @@ static struct dvobj_priv *usb_dvobj_init(struct usb_interface *usb_intf)
phost_conf = pusbd->actconfig;
pconf_desc = &phost_conf->desc;
phost_iface = &usb_intf->altsetting[0];
phost_iface = usb_intf->cur_altsetting;
piface_desc = &phost_iface->desc;
pdvobjpriv->NumInterfaces = pconf_desc->bNumInterfaces;