Commit f2fd7720 authored by Heinrich Schuchardt's avatar Heinrich Schuchardt Committed by Ben Hutchings

usb: gadget: avoid exposing kernel stack

commit ffeee83a upstream.

Function in_rq_cur copies random bytes from the stack.
Zero the memory instead.

Fixes: 132fcb46 ("usb: gadget: Add Audio Class 2.0 Driver")
Signed-off-by: default avatarHeinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: default avatarFelipe Balbi <felipe.balbi@linux.intel.com>
[bwh: Backported to 3.16: adjust filename]
Signed-off-by: default avatarBen Hutchings <ben@decadent.org.uk>
parent af361f44
......@@ -1153,6 +1153,7 @@ in_rq_cur(struct usb_function *fn, const struct usb_ctrlrequest *cr)
if (control_selector == UAC2_CS_CONTROL_SAM_FREQ) {
struct cntrl_cur_lay3 c;
memset(&c, 0, sizeof(struct cntrl_cur_lay3));
if (entity_id == USB_IN_CLK_ID)
c.dCUR = p_srate;
......
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