linux-kernel - Re: nfs mount fail

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Message-Id: <1255935888.11116.6.camel@heimdal.trondhjem.org>
Date:	Mon, 19 Oct 2009 16:04:48 +0900
From:	Trond Myklebust <trond.myklebust@....uio.no>
To:	Ingo Molnar <mingo@...e.hu>
Cc:	Yinghai Lu <yhlu.kernel@...il.com>,
	Pekka Enberg <penberg@...helsinki.fi>,
	Arjan van de Ven <arjan@...radead.org>,
	David Miller <davem@...emloft.net>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: nfs mount fail

On Mon, 2009-10-19 at 08:54 +0200, Ingo Molnar wrote:
> * Trond Myklebust <trond.myklebust@....uio.no> wrote:
> 
> > > yes. something miss merged again...
> > > 
> > > need change some lines.
> > 
> > This doesn't match mainline either. To do so, the above kfree() has to 
> > be at the end of the "Opt_xprt_rdma:" case...
> 
> it's from a test patch in tip:out-of-tree:
> 
>   d40bc6b: <not-for-merge> nfs: fix nfs_parse_mount_options() double kfree()
> 
> (attached below)
> 
> that fix is wrong apparently - is there a correct fix upstream perhaps?
<snip>
> This commit:
> 
>   a67d18f: NFS: load the rpc/rdma transport module automatically
> 
> Moved a kfree() of the options strings in nfs_parse_mount_options()
> inadvertently and introduced a double kfree(). Fix it.
> 
> Reported-by: Yinghai Lu <yinghai@...nel.org>
> Analyzed-by: Pekka Enberg <penberg@...helsinki.fi>
> Signed-off-by: Ingo Molnar <mingo@...e.hu>
> ---
>  fs/nfs/super.c |    2 +-
>  1 files changed, 1 insertions(+), 1 deletions(-)
> 
> diff --git a/fs/nfs/super.c b/fs/nfs/super.c
> index a2c18ac..482a2c3 100644
> --- a/fs/nfs/super.c
> +++ b/fs/nfs/super.c
> @@ -1231,6 +1231,7 @@ static int nfs_parse_mount_options(char *raw,
>  				goto out_nomem;
>  			token = match_token(string,
>  					    nfs_xprt_protocol_tokens, args);
> +			kfree(string);
>  
>  			switch (token) {
>  			case Opt_xprt_udp:
> @@ -1262,7 +1263,6 @@ static int nfs_parse_mount_options(char *raw,
>  				goto out_nomem;
>  			token = match_token(string,
>  					    nfs_xprt_protocol_tokens, args);
> -			kfree(string);
>  
>  			switch (token) {
>  			case Opt_xprt_udp:

This patch appears to be reverting the correct fix from commit d508afb
in mainline
        http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git&a=commitdiff&h=d508afb437daee7cf07da085b635c44a4ebf9b38

Cheers
  Trond

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