Re: rdma_cm NULL deref in 4.11.0+

[Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org>]

On Wed, May 24, 2017 at 07:58:17PM +0000, Majd Dibbiny wrote:
> 
> > On May 24, 2017, at 10:19 PM, Jason Gunthorpe <jgunthorpe-ePGOBjL8dl3ta4EC/59zMFaTQe2KTcn/@public.gmane.org> wrote:
> > 
> >> On Wed, May 24, 2017 at 09:52:56PM +0300, Leon Romanovsky wrote:
> >>> On Wed, May 24, 2017 at 10:38:32AM -0600, Jason Gunthorpe wrote:
> >>>> On Sun, May 21, 2017 at 06:44:43PM +0300, Leon Romanovsky wrote:
> >>>>> On Sun, May 21, 2017 at 02:30:04PM +0000, Parav Pandit wrote:
> >>>>> Hi Sagi,
> >>>>> 
> >>>>> Majd encountered same sometime back and reported [1].
> >>>>> He has the fix should be posting the fix soon.
> >>>>> 
> >>>>> Majd/Leon?
> >>>> 
> >>>> The fix is in our rdma-rc branch.
> >>>> https://git.kernel.org/pub/scm/linux/kernel/git/leon/linux-rdma.git/commit/?h=rdma-rc&id=f1fff656d55c52aeb12129f57347886b02f90e1d
> >>>> 
> >>>> I planned to submit it today.
> >>> 
> >>> Is someone going to look at the segfault in librdmacm?
> >> 
> >> Does it reproduce with these two patches?
> > 
> > I don't think librdmacm should segfault even if the kernel is
> > malfunctioning, should it?
> The problem now is a kernel panic.. which segfault are you referring
> to?

The original report refered to a user space seg fault, is that just
blowback from the kernel panic?

Jason
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