linux-kernel - [PATCH 4.9 07/59] usbnet: smsc95xx: disable carrier check while suspending

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: <20181121183508.540993292@linuxfoundation.org>
Date:   Wed, 21 Nov 2018 20:06:22 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Frieder Schrempf <frieder.schrempf@...tron.de>,
        Raghuram Chary J <RaghuramChary.Jallipalli@...rochip.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH 4.9 07/59] usbnet: smsc95xx: disable carrier check while suspending

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

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

From: Frieder Schrempf <frieder.schrempf@...tron.de>

[ Upstream commit 7b900ead6cc66b2ee873cb042dfba169aa68b56c ]

We need to make sure, that the carrier check polling is disabled
while suspending. Otherwise we can end up with usbnet_read_cmd()
being issued when only usbnet_read_cmd_nopm() is allowed. If this
happens, read operations lock up.

Fixes: d69d169493 ("usbnet: smsc95xx: fix link detection for disabled autonegotiation")
Signed-off-by: Frieder Schrempf <frieder.schrempf@...tron.de>
Reviewed-by: Raghuram Chary J <RaghuramChary.Jallipalli@...rochip.com>
Signed-off-by: David S. Miller <davem@...emloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 drivers/net/usb/smsc95xx.c |    7 +++++++
 1 file changed, 7 insertions(+)

--- a/drivers/net/usb/smsc95xx.c
+++ b/drivers/net/usb/smsc95xx.c
@@ -1590,6 +1590,8 @@ static int smsc95xx_suspend(struct usb_i
 		return ret;
 	}
 
+	cancel_delayed_work_sync(&pdata->carrier_check);
+
 	if (pdata->suspend_flags) {
 		netdev_warn(dev->net, "error during last resume\n");
 		pdata->suspend_flags = 0;
@@ -1832,6 +1834,11 @@ done:
 	 */
 	if (ret && PMSG_IS_AUTO(message))
 		usbnet_resume(intf);
+
+	if (ret)
+		schedule_delayed_work(&pdata->carrier_check,
+				      CARRIER_CHECK_DELAY);
+
 	return ret;
 }