Re: [PATCH 6/6] sysctl: pass kernel pointers to ->proc_handler

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To: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Subject: Re: [PATCH 6/6] sysctl: pass kernel pointers to ->proc_handler
From: Christoph Hellwig <hch@xxxxxx>
Date: Tue, 21 Apr 2020 09:55:34 +0200
Cc: Andrey Ignatov <rdna@xxxxxx>, Christoph Hellwig <hch@xxxxxx>, Kees Cook <keescook@xxxxxxxxxxxx>, Iurii Zaikin <yzaikin@xxxxxxxxxx>, Luis Chamberlain <mcgrof@xxxxxxxxxx>, Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>, "Rafael J. Wysocki" <rafael@xxxxxxxxxx>, Alexei Starovoitov <ast@xxxxxxxxxx>, Daniel Borkmann <daniel@xxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, linux-fsdevel@xxxxxxxxxxxxxxx, netdev@xxxxxxxxxxxxxxx, bpf@xxxxxxxxxxxxxxx
In-reply-to: <20200417195015.GO5820@bombadil.infradead.org>
References: <20200417064146.1086644-1-hch@lst.de> <20200417064146.1086644-7-hch@lst.de> <20200417193910.GA7011@rdna-mbp> <20200417195015.GO5820@bombadil.infradead.org>
User-agent: Mutt/1.5.17 (2007-11-01)

On Fri, Apr 17, 2020 at 12:50:15PM -0700, Matthew Wilcox wrote:
> > cur_val is allocated separately below to read current value of sysctl
> > and not interfere with user-passed buffer. 

Ok, I'll fix this up.

References:
- pass kernel pointers to the sysctl ->proc_handler method
  - From: Christoph Hellwig
- [PATCH 6/6] sysctl: pass kernel pointers to ->proc_handler
  - From: Christoph Hellwig
- Re: [PATCH 6/6] sysctl: pass kernel pointers to ->proc_handler
  - From: Andrey Ignatov
- Re: [PATCH 6/6] sysctl: pass kernel pointers to ->proc_handler
  - From: Matthew Wilcox

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