linux-kernel - Re: [Patch] sunrpc: NULL utsname dereference on NFS umount during namespace cleanup

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Message-ID: <87mw4vu9pa.fsf@spindle.srvr.nix>
Date:	Tue, 03 Feb 2015 00:20:49 +0000
From:	Nix <nix@...eri.org.uk>
To:	Trond Myklebust <trond.myklebust@...marydata.com>
Cc:	Bruno Prémont <bonbons@...ux-vserver.org>,
	"J. Bruce Fields" <bfields@...ldses.org>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linux NFS Mailing List <linux-nfs@...r.kernel.org>
Subject: Re: [Patch] sunrpc: NULL utsname dereference on NFS umount during namespace cleanup

On 2 Feb 2015, Trond Myklebust verbalised:
> Hmm... I'm at a loss to see how rpcb_create can ever call
> rpc_new_client() with a null value for the nodename with that patch
> applied. Are you 100% sure that the above Oops came from a patched
> kernel? That IP address of "rpc_new_client+0x13b/0x1f2" looks
> identical to the one in your original posting.

I've been swapping kernels a lot of late due to bisection -- it is
perfectly possible that I somehow ended up running an unpatched one :/

I'll do a build from scratch with the patch and reboot into it. My
apologies if this was a false positive (which it looks quite like it
might have been: your evidence is pretty persuasive!)

-- 
NULL && (void)
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