1 files changed, 40 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/brcm/113-v5.6-brcmfmac-fix-interface-sanity-check.patch b/package/kernel/mac80211/patches/brcm/113-v5.6-brcmfmac-fix-interface-sanity-check.patch
new file mode 100644
index 0000000000..e1dfe84c97
--- /dev/null
+++ b/package/kernel/mac80211/patches/brcm/113-v5.6-brcmfmac-fix-interface-sanity-check.patch
@@ -0,0 +1,40 @@
+From 3428fbcd6e6c0850b1a8b2a12082b7b2aabb3da3 Mon Sep 17 00:00:00 2001
+From: Johan Hovold <johan@kernel.org>
+Date: Tue, 10 Dec 2019 12:44:22 +0100
+Subject: [PATCH] brcmfmac: fix interface sanity check
+
+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: 71bb244ba2fd ("brcm80211: fmac: add USB support for bcm43235/6/8 chipsets")
+Cc: stable <stable@vger.kernel.org>     # 3.4
+Cc: Arend van Spriel <arend@broadcom.com>
+Signed-off-by: Johan Hovold <johan@kernel.org>
+Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
+---
+ drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+--- a/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
++++ b/drivers/net/wireless/broadcom/brcm80211/brcmfmac/usb.c
+@@ -1348,7 +1348,7 @@ brcmf_usb_probe(struct usb_interface *in
+ 		goto fail;
+ 	}
+ 
+-	desc = &intf->altsetting[0].desc;
++	desc = &intf->cur_altsetting->desc;
+ 	if ((desc->bInterfaceClass != USB_CLASS_VENDOR_SPEC) ||
+ 	    (desc->bInterfaceSubClass != 2) ||
+ 	    (desc->bInterfaceProtocol != 0xff)) {
+@@ -1361,7 +1361,7 @@ brcmf_usb_probe(struct usb_interface *in
+ 
+ 	num_of_eps = desc->bNumEndpoints;
+ 	for (ep = 0; ep < num_of_eps; ep++) {
+-		endpoint = &intf->altsetting[0].endpoint[ep].desc;
++		endpoint = &intf->cur_altsetting->endpoint[ep].desc;
+ 		endpoint_num = usb_endpoint_num(endpoint);
+ 		if (!usb_endpoint_xfer_bulk(endpoint))
+ 			continue;