linux-kernel - Re: Panic in reserve

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <1267045764.16916.920.camel@localhost.localdomain>
Date:	Wed, 24 Feb 2010 13:09:24 -0800
From:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
To:	Jack Steiner <steiner@....com>
Cc:	"Siddha, Suresh B" <suresh.b.siddha@...el.com>,
	"mingo@...e.hu" <mingo@...e.hu>,
	"tglx@...utronix.de" <tglx@...utronix.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: Panic in reserve_memtype()


On Wed, 2010-02-24 at 12:22 -0800, Jack Steiner wrote:
> We see an X86_64 regression that started a few days ago. The kernel is booted
> via EFI & panics in the pat.c code trying to deref a NULL pointer.
> 
> I didn't debug the problem but am suspicious of
> 	x86, pat: Migrate to rbtree only backend for pat memtype management  x86/pat
> 		author	Pallipadi, Venkatesh <venkatesh.pallipadi@...el.com>	
> 		Wed, 10 Feb 2010 23:26:07 +0000 (15:26 -0800)
> 	committer	H. Peter Anvin <hpa@...or.com>	
> 		Thu, 18 Feb 2010 23:41:36 +0000 (15:41 -0800)
> 
> 
> 
> Has anyone seen this? If not, I can debug further....
> 


Haven't seen this on my test systems here, but I haven't tested with EFI
boot either.

I assume this is repeatable, and you always see this panic. I am looking
at the code right now. Can you rollback this particular patch and see
whether it goes away?

Thanks,
Venki

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/