linux-kernel - [PATCH 3.16 23/99] rsi: fix use-after-free on failed probe and unbind

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]

Date:   Wed, 20 May 2020 15:13:51 +0100
From:   Ben Hutchings <ben@...adent.org.uk>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
CC:     akpm@...ux-foundation.org, Denis Kirjanov <kda@...ux-powerpc.org>,
        "Siva Rebbagondla" <siva.rebbagondla@...pinesignals.com>,
        "Fariya Fatima" <fariyaf@...il.com>,
        "Johan Hovold" <johan@...nel.org>,
        "Amitkumar Karwar" <amit.karwar@...pinesignals.com>,
        "Prameela Rani Garnepudi" <prameela.j04cs@...il.com>,
        "Kalle Valo" <kvalo@...eaurora.org>,
        syzbot+b563b7f8dbe8223a51e8@...kaller.appspotmail.com
Subject: [PATCH 3.16 23/99] rsi: fix use-after-free on failed probe and unbind

3.16.84-rc1 review patch.  If anyone has any objections, please let me know.

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

From: Johan Hovold <johan@...nel.org>

commit e93cd35101b61e4c79149be2cfc927c4b28dc60c upstream.

Make sure to stop both URBs before returning after failed probe as well
as on disconnect to avoid use-after-free in the completion handler.

Reported-by: syzbot+b563b7f8dbe8223a51e8@...kaller.appspotmail.com
Fixes: a4302bff28e2 ("rsi: add bluetooth rx endpoint")
Fixes: dad0d04fa7ba ("rsi: Add RS9113 wireless driver")
Cc: Siva Rebbagondla <siva.rebbagondla@...pinesignals.com>
Cc: Prameela Rani Garnepudi <prameela.j04cs@...il.com>
Cc: Amitkumar Karwar <amit.karwar@...pinesignals.com>
Cc: Fariya Fatima <fariyaf@...il.com>
Signed-off-by: Johan Hovold <johan@...nel.org>
Signed-off-by: Kalle Valo <kvalo@...eaurora.org>
[bwh: Backported to 3.16: There is no BT support, so we only need to
 kill one URB on disconnect.]
Signed-off-by: Ben Hutchings <ben@...adent.org.uk>
---
--- a/drivers/net/wireless/rsi/rsi_91x_usb.c
+++ b/drivers/net/wireless/rsi/rsi_91x_usb.c
@@ -245,6 +245,14 @@ static void rsi_rx_done_handler(struct u
 	rsi_set_event(&dev->rx_thread.event);
 }
 
+static void rsi_rx_urb_kill(struct rsi_hw *adapter)
+{
+	struct rsi_91x_usbdev *dev = (struct rsi_91x_usbdev *)adapter->rsi_dev;
+	struct urb *urb = dev->rx_usb_urb[0];
+
+	usb_kill_urb(urb);
+}
+
 /**
  * rsi_rx_urb_submit() - This function submits the given URB to the USB stack.
  * @adapter: Pointer to the adapter structure.
@@ -510,6 +518,8 @@ static void rsi_disconnect(struct usb_in
 	if (!adapter)
 		return;
 
+	rsi_rx_urb_kill(adapter);
+
 	rsi_mac80211_detach(adapter);
 	rsi_deinit_usb_interface(adapter);
 	rsi_91x_deinit(adapter);