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From: Johan Hovold <johan@kernel.org>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Larry Finger <Larry.Finger@lwfinger.net>,
	Florian Schilhabel <florian.c.schilhabel@googlemail.com>,
	devel@driverdev.osuosl.org, linux-usb@vger.kernel.org,
	linux-kernel@vger.kernel.org, Johan Hovold <johan@kernel.org>,
	stable <stable@vger.kernel.org>
Subject: [PATCH 1/2] staging: rtl8188eu: fix interface sanity check
Date: Tue, 10 Dec 2019 12:47:50 +0100	[thread overview]
Message-ID: <20191210114751.5119-2-johan@kernel.org> (raw)
In-Reply-To: <20191210114751.5119-1-johan@kernel.org>

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: c2478d39076b ("staging: r8188eu: Add files for new driver - part 20")
Cc: stable <stable@vger.kernel.org>     # 3.12
Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/staging/rtl8188eu/os_dep/usb_intf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/rtl8188eu/os_dep/usb_intf.c b/drivers/staging/rtl8188eu/os_dep/usb_intf.c
index 4fac9dca798e..a7cac0719b8b 100644
--- a/drivers/staging/rtl8188eu/os_dep/usb_intf.c
+++ b/drivers/staging/rtl8188eu/os_dep/usb_intf.c
@@ -70,7 +70,7 @@ static struct dvobj_priv *usb_dvobj_init(struct usb_interface *usb_intf)
 	phost_conf = pusbd->actconfig;
 	pconf_desc = &phost_conf->desc;
 
-	phost_iface = &usb_intf->altsetting[0];
+	phost_iface = usb_intf->cur_altsetting;
 	piface_desc = &phost_iface->desc;
 
 	pdvobjpriv->NumInterfaces = pconf_desc->bNumInterfaces;
-- 
2.24.0


WARNING: multiple messages have this Message-ID (diff)
From: Johan Hovold <johan@kernel.org>
To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: devel@driverdev.osuosl.org,
	Florian Schilhabel <florian.c.schilhabel@googlemail.com>,
	linux-usb@vger.kernel.org, Johan Hovold <johan@kernel.org>,
	stable <stable@vger.kernel.org>,
	linux-kernel@vger.kernel.org,
	Larry Finger <Larry.Finger@lwfinger.net>
Subject: [PATCH 1/2] staging: rtl8188eu: fix interface sanity check
Date: Tue, 10 Dec 2019 12:47:50 +0100	[thread overview]
Message-ID: <20191210114751.5119-2-johan@kernel.org> (raw)
In-Reply-To: <20191210114751.5119-1-johan@kernel.org>

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: c2478d39076b ("staging: r8188eu: Add files for new driver - part 20")
Cc: stable <stable@vger.kernel.org>     # 3.12
Signed-off-by: Johan Hovold <johan@kernel.org>
---
 drivers/staging/rtl8188eu/os_dep/usb_intf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/rtl8188eu/os_dep/usb_intf.c b/drivers/staging/rtl8188eu/os_dep/usb_intf.c
index 4fac9dca798e..a7cac0719b8b 100644
--- a/drivers/staging/rtl8188eu/os_dep/usb_intf.c
+++ b/drivers/staging/rtl8188eu/os_dep/usb_intf.c
@@ -70,7 +70,7 @@ static struct dvobj_priv *usb_dvobj_init(struct usb_interface *usb_intf)
 	phost_conf = pusbd->actconfig;
 	pconf_desc = &phost_conf->desc;
 
-	phost_iface = &usb_intf->altsetting[0];
+	phost_iface = usb_intf->cur_altsetting;
 	piface_desc = &phost_iface->desc;
 
 	pdvobjpriv->NumInterfaces = pconf_desc->bNumInterfaces;
-- 
2.24.0

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  reply	other threads:[~2019-12-10 11:48 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-10 11:47 [PATCH 0/2] staging: fix USB altsetting bugs Johan Hovold
2019-12-10 11:47 ` Johan Hovold
2019-12-10 11:47 ` Johan Hovold [this message]
2019-12-10 11:47   ` [PATCH 1/2] staging: rtl8188eu: fix interface sanity check Johan Hovold
2019-12-10 11:47 ` [PATCH 2/2] staging: rtl8712: " Johan Hovold
2019-12-10 11:47   ` Johan Hovold

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