Re: CVE Request: kernel: l2tp: Fix oops in pppol2tp_xmit

[Eugene Teo <eugeneteo () kernel sg>]

On 07/04/2010 07:13 PM, Moritz Muehlenhoff wrote:
> On Wed, Jun 23, 2010 at 11:43:51AM +0800, Eugene Teo wrote:
> > "When transmitting L2TP frames, we derive the outgoing interface's
> > UDP checksum hardware assist capabilities from the tunnel dst dev.
> > This can sometimes be NULL, especially when routing protocols are
> > used and routing changes occur. This patch just checks for NULL dst
> > or dev pointers when checking for netdev hardware assist features.
> >
> >      BUG: unable to handle kernel NULL pointer dereference at 0000000c
> >      IP: [<f89d074c>] pppol2tp_xmit+0x341/0x4da [pppol2tp]
> >      *pde = 00000000
> >      Oops: 0000 [#1] SMP
> >      last sysfs file: /sys/class/net/lo/operstate
> > [...]"
> >
> > Introduced in ffcebb16 (v2.6.29-rc1~581), fixed in 3feec909 (fixed
> > in v2.6.34-rc2). (It was later split into different files in commit
> > fd558d18 v2.6.35-rc1).
> >
> > I'm not requesting a CVE name for this because it did not affect any
> > of our supported kernels. FYI.
>
> Steve, please assign a CVE ID for this.

cc'ed coley () linus mitre org.

Please change the subject as well so that we know this needs a CVE name.

Thanks, Eugene
--
main(i) { putchar(182623909 >> (i-1) * 5&31|!!(i<7)<<6) && main(++i); }