6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Thinh Nguyen <Thinh.Nguyen@xxxxxxxxxxxx>
commit 3b997089903b909684114aca6f79d683e5c64a0e upstream.
Check to make sure that the GetInterface and SetInterface are for valid
interface. Return proper alternate setting number on GetInterface.
Fixes: 0b8b1a1fede0 ("usb: gadget: f_tcm: Provide support to get alternate setting in tcm function")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Thinh Nguyen <Thinh.Nguyen@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/ffd91b4640945ea4d3b4f4091cf1abbdbd9cf4fc.1733876548.git.Thinh.Nguyen@xxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/gadget/function/f_tcm.c | 12 ++++++++++--
1 file changed, 10 insertions(+), 2 deletions(-)
--- a/drivers/usb/gadget/function/f_tcm.c
+++ b/drivers/usb/gadget/function/f_tcm.c
@@ -2048,9 +2048,14 @@ static void tcm_delayed_set_alt(struct w
static int tcm_get_alt(struct usb_function *f, unsigned intf)
{
- if (intf == bot_intf_desc.bInterfaceNumber)
+ struct f_uas *fu = to_f_uas(f);
+
+ if (fu->iface != intf)
+ return -EOPNOTSUPP;
+
+ if (fu->flags & USBG_IS_BOT)
return USB_G_ALT_INT_BBB;
- if (intf == uasp_intf_desc.bInterfaceNumber)
+ else if (fu->flags & USBG_IS_UAS)
return USB_G_ALT_INT_UAS;
return -EOPNOTSUPP;
@@ -2060,6 +2065,9 @@ static int tcm_set_alt(struct usb_functi
{
struct f_uas *fu = to_f_uas(f);
+ if (fu->iface != intf)
+ return -EOPNOTSUPP;
+
if ((alt == USB_G_ALT_INT_BBB) || (alt == USB_G_ALT_INT_UAS)) {
struct guas_setup_wq *work;
