linux-kernel - [PATCH 4.9 69/94] USB: usbdevfs: restore warning for nonsensical flags

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20181002132505.301820420@linuxfoundation.org>
Date:   Tue,  2 Oct 2018 06:25:23 -0700
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Oliver Neukum <oneukum@...e.com>
Subject: [PATCH 4.9 69/94] USB: usbdevfs: restore warning for nonsensical flags

4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Oliver Neukum <oneukum@...e.com>

commit 81e0403b26d94360abd1f6a57311337973bc82cd upstream.

If we filter flags before they reach the core we need to generate our
own warnings.

Signed-off-by: Oliver Neukum <oneukum@...e.com>
Fixes: 0cb54a3e47cb ("USB: debugging code shouldn't alter control flow")
Cc: stable <stable@...r.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/usb/core/devio.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/usb/core/devio.c
+++ b/drivers/usb/core/devio.c
@@ -1714,6 +1714,11 @@ static int proc_do_submiturb(struct usb_
 		u |= URB_NO_INTERRUPT;
 	as->urb->transfer_flags = u;
 
+	if (!allow_short && uurb->flags & USBDEVFS_URB_SHORT_NOT_OK)
+		dev_warn(&ps->dev->dev, "Requested nonsensical USBDEVFS_URB_SHORT_NOT_OK.\n");
+	if (!allow_zero && uurb->flags & USBDEVFS_URB_ZERO_PACKET)
+		dev_warn(&ps->dev->dev, "Requested nonsensical USBDEVFS_URB_ZERO_PACKET.\n");
+
 	as->urb->transfer_buffer_length = uurb->buffer_length;
 	as->urb->setup_packet = (unsigned char *)dr;
 	dr = NULL;