Re: Patch "net: ppp: Don't call bpf_prog_create() in ppp_lock" has been added to the 3.17-stable tree

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At Wed, 19 Nov 2014 00:27:43 +0100,
Stefan Seyfried wrote:
> 
> Hi Greg,
> 
> Am 18.11.2014 um 18:12 schrieb gregkh@xxxxxxxxxxxxxxxxxxx:
> > 
> > This is a note to let you know that I've just added the patch titled
> > 
> >     net: ppp: Don't call bpf_prog_create() in ppp_lock
> > 
> > to the 3.17-stable tree which can be found at:
> >     http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
> 
> 3.17 did not show the problem for me. That does not mean that the patch
> is not suitable for 3.17, it just means that strictly speaking it is not
> really necessary.

Usually you doesn't hit it on 3.17 or earlier unless memory gets
tight, but the bug is certainly there :)

> But I relly do not know anything about the technical issues, I just
> reported the crash that was in 3.18-rc

On 3.18, it was changed to vmalloc() so it became more obvious (it
explicitly issues BUG_ON()).


Takashi

> 
> > The filename of the patch is:
> >      net-ppp-don-t-call-bpf_prog_create-in-ppp_lock.patch
> > and it can be found in the queue-3.17 subdirectory.
> > 
> > If you, or anyone else, feels it should not be added to the stable tree,
> > please let <stable@xxxxxxxxxxxxxxx> know about it.
> > 
> > 
> > From foo@baz Tue Nov 18 09:07:25 PST 2014
> > From: Takashi Iwai <tiwai@xxxxxxx>
> > Date: Mon, 10 Nov 2014 11:50:21 +0100
> > Subject: net: ppp: Don't call bpf_prog_create() in ppp_lock
> > 
> > From: Takashi Iwai <tiwai@xxxxxxx>
> > 
> > [ Upstream commit 5748eb8f8e989a9da1ac7c96dc73d68cbdedf7df ]
> 
> Best regards,
> 
> 	Stefan
> -- 
> Stefan Seyfried
> Linux Consultant & Developer -- GPG Key: 0x731B665B
> 
> B1 Systems GmbH
> Osterfeldstraße 7 / 85088 Vohburg / http://www.b1-systems.de
> GF: Ralph Dehner / Unternehmenssitz: Vohburg / AG: Ingolstadt,HRB 3537
> 
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