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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