Date: Sun, 6 Nov 2011 13:06:32 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-9@freebsd.org Subject: svn commit: r227211 - stable/9/sys/fs/devfs Message-ID: <201111061306.pA6D6WAp022578@svn.freebsd.org>
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Author: kib Date: Sun Nov 6 13:06:31 2011 New Revision: 227211 URL: http://svn.freebsd.org/changeset/base/227211 Log: MFC r227062: Fix kernel panic when d_fdopen csw method is called for NULL fp. This may happen when kernel consumer calls VOP_OPEN(). Approved by: re (kensmith) Modified: stable/9/sys/fs/devfs/devfs_vnops.c Directory Properties: stable/9/sys/ (props changed) Modified: stable/9/sys/fs/devfs/devfs_vnops.c ============================================================================== --- stable/9/sys/fs/devfs/devfs_vnops.c Sun Nov 6 13:03:59 2011 (r227210) +++ stable/9/sys/fs/devfs/devfs_vnops.c Sun Nov 6 13:06:31 2011 (r227211) @@ -1050,6 +1050,10 @@ devfs_open(struct vop_open_args *ap) dsw = dev_refthread(dev, &ref); if (dsw == NULL) return (ENXIO); + if (fp == NULL && dsw->d_fdopen != NULL) { + dev_relthread(dev, ref); + return (ENXIO); + } vlocked = VOP_ISLOCKED(vp); VOP_UNLOCK(vp, 0);
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