[Devel] Re: [linux-cifs-client] oops in khelper

[Jeff Layton]

On Fri, 09 Nov 2007 15:31:12 +0300
Vasily Averin <vvs at sw.ru> wrote:

> Jeff Layton wrote:
> > On Fri, 09 Nov 2007 14:17:38 +0300
> > Vasily Averin <vvs at sw.ru> wrote:
> > 
> >> Hello Steve,
> >>
> >> Could you please take a look at the following oops? It looks like
> >> it is related to cifs:
> >> 1) Code line is corrupted (21 byte?!?), It looks like part of CIFS
> >> smb_hdr with CIFS magic:
> >>  00 00 50 ff 53 4d 42 32 00 00 00 00 80 41 c0 <00> 00 00 00 00 00
> >>           FF S  M  B
> > 
> > Looks like the random memory corruption I was chasing around a month
> > ago. It's a nasty bug. This patch from the cifs-2.6 git tree will
> > probably fix it:
> > 
> > commit c18c732ec6bf372aa959ca6534cbfc32e464defd
> > Author: Steve French <sfrench at us.ibm.com>
> > Date:   Wed Oct 17 18:01:11 2007 +0000
> > 
> >     [CIFS] fix bad handling of EAGAIN error on kernel_recvmsg in
> > cifs_demultiplex_thread
> 
> Jeff,
> thank you for this hint.
> However I would pay your attention that our kernel is based on RHEL4,
> and obviously it is vulnerabled too.
> 
> thank you,
> 	Vasily Averin

Yep. It's already been patched for RHEL 4.6 and 5.1.

-- 
Jeff Layton <jlayton at redhat.com>