From owner-svn-src-all@freebsd.org Tue Mar 15 15:47:27 2016 Return-Path: Delivered-To: svn-src-all@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id A2FCFACAA0F; Tue, 15 Mar 2016 15:47:27 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 59A211235; Tue, 15 Mar 2016 15:47:27 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id u2FFlQ4R078645; Tue, 15 Mar 2016 15:47:26 GMT (envelope-from hselasky@FreeBSD.org) Received: (from hselasky@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id u2FFlQKN078643; Tue, 15 Mar 2016 15:47:26 GMT (envelope-from hselasky@FreeBSD.org) Message-Id: <201603151547.u2FFlQKN078643@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: hselasky set sender to hselasky@FreeBSD.org using -f From: Hans Petter Selasky Date: Tue, 15 Mar 2016 15:47:26 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r296909 - head/sys/ofed/drivers/infiniband/ulp/ipoib X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 15 Mar 2016 15:47:27 -0000 Author: hselasky Date: Tue Mar 15 15:47:26 2016 New Revision: 296909 URL: https://svnweb.freebsd.org/changeset/base/296909 Log: Fix witness panic in the ipoib_ioctl() function when unloading the ipoib module. The bpfdetach() function is trying to turn off promiscious mode on the network interface it is attached to while holding a mutex. The fix consists of ignoring any further calls to the ipoib_ioctl() function when the network interface is going to be detached. The ipoib_ioctl() function might sleep. Sponsored by: Mellanox Technologies MFC after: 1 week Modified: head/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib.h head/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_main.c Modified: head/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib.h ============================================================================== --- head/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib.h Tue Mar 15 15:42:53 2016 (r296908) +++ head/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib.h Tue Mar 15 15:47:26 2016 (r296909) @@ -322,6 +322,8 @@ struct ipoib_dev_priv { unsigned long flags; + int gone; + struct mutex vlan_mutex; struct rb_root path_tree; Modified: head/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_main.c ============================================================================== --- head/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_main.c Tue Mar 15 15:42:53 2016 (r296908) +++ head/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_main.c Tue Mar 15 15:47:26 2016 (r296909) @@ -258,6 +258,10 @@ ipoib_ioctl(struct ifnet *ifp, u_long co struct ifreq *ifr = (struct ifreq *) data; int error = 0; + /* check if detaching */ + if (priv == NULL || priv->gone != 0) + return (ENXIO); + switch (command) { case SIOCSIFFLAGS: if (ifp->if_flags & IFF_UP) { @@ -794,6 +798,7 @@ ipoib_detach(struct ipoib_dev_priv *priv dev = priv->dev; if (!test_bit(IPOIB_FLAG_SUBINTERFACE, &priv->flags)) { + priv->gone = 1; bpfdetach(dev); if_detach(dev); if_free(dev);