[PATCH] MPSAFE/LOOKUP_SHARED cd9660
jhb at freebsd.org
Wed Dec 10 19:58:03 UTC 2008
On Wednesday 10 December 2008 12:22:43 pm Paul B. Mahol wrote:
> On 12/9/08, John Baldwin <jhb at freebsd.org> wrote:
> > The RRIP stuff is all done in cd9660_vget_internal() under an exclusive
> > lock.
> > It could be a property of the ISO image. "PX" holds permissions (owner,
> > etc.). Do you get the same messages w/o the patch with the same ISO
> > CD?
> > --
> > John Baldwin
> I searched little for this message and found kern/63446 PR interesting
> Caused by cd9660_vnops.c rev. 1.77. VOP_READDIR returns bogus
> d_fileno, VFS_VGET on this value returns bogus vnode with zeroed
> I think that whatever locking is done is done wrong.
That issue isn't a locking issue, it's an issue with VOP_READDIR() using a
different meaning for i-node numbers than VFS_VGET(), and would happen
regardless of any Giant or vnode locking.
More information about the freebsd-current