From: Christoph Hellwig <hch@lst.de>
To: Kees Cook <keescook@chromium.org>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>,
Christoph Hellwig <hch@lst.de>,
linux-kernel@vger.kernel.org, linux-hardening@vger.kernel.org
Subject: Re: [PATCH] usercopy: Disable CONFIG_HARDENED_USERCOPY_PAGESPAN
Date: Fri, 25 Mar 2022 06:31:08 +0100 [thread overview]
Message-ID: <20220325053108.GB5204@lst.de> (raw)
In-Reply-To: <20220324230255.1362706-1-keescook@chromium.org>
On Thu, Mar 24, 2022 at 04:02:55PM -0700, Kees Cook wrote:
> CONFIG_HARDENED_USERCOPY_PAGESPAN has been mostly broken for a while,
> and it has become hard to ignore with some recent scsi changes[1].
> While there is a more complete series to replace it with better checks[2],
> it should have more soak time in -next. Instead, disable the config now,
> with the expectation that it will be fully replaced in the next kernel
> release.
>
> [1] https://lore.kernel.org/lkml/20220324064846.GA12961@lst.de/
> [2] https://lore.kernel.org/linux-hardening/20220110231530.665970-1-willy@infradead.org/
>
> Suggested-by: Christoph Hellwig <hch@lst.de>
> Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
> Signed-off-by: Kees Cook <keescook@chromium.org>
I'd prefer to just remove the code, but this is better than nothing:
Acked-by: Christoph Hellwig <hch@lst.de>
prev parent reply other threads:[~2022-03-25 5:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-24 23:02 [PATCH] usercopy: Disable CONFIG_HARDENED_USERCOPY_PAGESPAN Kees Cook
2022-03-25 5:31 ` Christoph Hellwig [this message]
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