[src/trunk]: src/sys/miscfs/genfs Add missing check for dead or dying vnode t...

[hannken <hannken%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/f4af135bac32
branches:  trunk
changeset: 825036:f4af135bac32
user:      hannken <hannken%NetBSD.org@localhost>
date:      Tue Jun 27 08:40:53 2017 +0000

description:
Add missing check for dead or dying vnode to the entry of genfs_getpages().

diffstat:

 sys/miscfs/genfs/genfs_io.c |  11 +++++++++--
 1 files changed, 9 insertions(+), 2 deletions(-)

diffs (32 lines):

diff -r 78459a0ca74b -r f4af135bac32 sys/miscfs/genfs/genfs_io.c
--- a/sys/miscfs/genfs/genfs_io.c       Tue Jun 27 08:30:40 2017 +0000
+++ b/sys/miscfs/genfs/genfs_io.c       Tue Jun 27 08:40:53 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: genfs_io.c,v 1.69 2017/06/04 08:05:42 hannken Exp $    */
+/*     $NetBSD: genfs_io.c,v 1.70 2017/06/27 08:40:53 hannken Exp $    */
 
 /*
  * Copyright (c) 1982, 1986, 1989, 1993
@@ -31,7 +31,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: genfs_io.c,v 1.69 2017/06/04 08:05:42 hannken Exp $");
+__KERNEL_RCSID(0, "$NetBSD: genfs_io.c,v 1.70 2017/06/27 08:40:53 hannken Exp $");
 
 #include <sys/param.h>
 #include <sys/systm.h>
@@ -139,6 +139,13 @@
        KASSERT(vp->v_type == VREG || vp->v_type == VDIR ||
            vp->v_type == VLNK || vp->v_type == VBLK);
 
+       error = vdead_check(vp, VDEAD_NOWAIT);
+       if (error) {
+               if ((flags & PGO_LOCKED) == 0)
+                       mutex_exit(uobj->vmobjlock);
+               return error;
+       }
+
 startover:
        error = 0;
        const voff_t origvsize = vp->v_size;