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Subject[PATCH 1/1] usb: gadget: avoid exposing kernel stack
Date
Function in_rq_cur copies random bytes from the stack.
Zero the memory instead.

Fixes: 132fcb460839 ("usb: gadget: Add Audio Class 2.0 Driver")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
---
drivers/usb/gadget/function/f_uac2.c | 1 +
1 file changed, 1 insertion(+)

diff --git a/drivers/usb/gadget/function/f_uac2.c b/drivers/usb/gadget/function/f_uac2.c
index 186d4b1..23cba7b 100644
--- a/drivers/usb/gadget/function/f_uac2.c
+++ b/drivers/usb/gadget/function/f_uac2.c
@@ -1292,6 +1292,7 @@ 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;
--
2.1.4
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