This is a note to let you know that I've just added the patch titled
usb: core: config: fix validation of wMaxPacketValue entries
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
usb-core-config-fix-validation-of-wmaxpacketvalue-entries.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 1a3910c80966e4a76b25ce812f6bea0ef1b1d530 Mon Sep 17 00:00:00 2001
From: Pavel Hofman <pavel.hofman@xxxxxxxxxxx>
Date: Fri, 10 Dec 2021 09:52:18 +0100
Subject: usb: core: config: fix validation of wMaxPacketValue entries
From: Pavel Hofman <pavel.hofman@xxxxxxxxxxx>
commit 1a3910c80966e4a76b25ce812f6bea0ef1b1d530 upstream.
The checks performed by commit aed9d65ac327 ("USB: validate
wMaxPacketValue entries in endpoint descriptors") require that initial
value of the maxp variable contains both maximum packet size bits
(10..0) and multiple-transactions bits (12..11). However, the existing
code assings only the maximum packet size bits. This patch assigns all
bits of wMaxPacketSize to the variable.
Fixes: aed9d65ac327 ("USB: validate wMaxPacketValue entries in endpoint descriptors")
Cc: stable <stable@xxxxxxxxxxxxxxx>
Acked-by: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Signed-off-by: Pavel Hofman <pavel.hofman@xxxxxxxxxxx>
Link: https://lore.kernel.org/r/20211210085219.16796-1-pavel.hofman@xxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/usb/core/config.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/usb/core/config.c
+++ b/drivers/usb/core/config.c
@@ -406,7 +406,7 @@ static int usb_parse_endpoint(struct dev
* the USB-2 spec requires such endpoints to have wMaxPacketSize = 0
* (see the end of section 5.6.3), so don't warn about them.
*/
- maxp = usb_endpoint_maxp(&endpoint->desc);
+ maxp = le16_to_cpu(endpoint->desc.wMaxPacketSize);
if (maxp == 0 && !(usb_endpoint_xfer_isoc(d) && asnum == 0)) {
dev_warn(ddev, "config %d interface %d altsetting %d endpoint 0x%X has invalid wMaxPacketSize 0\n",
cfgno, inum, asnum, d->bEndpointAddress);
Patches currently in stable-queue which might be from pavel.hofman@xxxxxxxxxxx are
queue-5.15/usb-core-config-fix-validation-of-wmaxpacketvalue-entries.patch
queue-5.15/usb-core-config-using-bit-mask-instead-of-individual-bits.patch
