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Message-ID: <f800ee0f-9ac5-f91c-c1a6-3e094721c91d@gmail.com>
Date: Thu, 20 Dec 2018 18:53:25 +0200
From: Igor Stoppa <igor.stoppa@...il.com>
To: Andy Lutomirski <luto@...capital.net>,
Matthew Wilcox <willy@...radead.org>, Peter Zijlstra <peterz@...radead.org>,
Dave Hansen <dave.hansen@...ux.intel.com>,
Mimi Zohar <zohar@...ux.vnet.ibm.com>
Cc: igor.stoppa@...wei.com, Nadav Amit <nadav.amit@...il.com>,
Kees Cook <keescook@...omium.org>, linux-integrity@...r.kernel.org,
kernel-hardening@...ts.openwall.com, linux-mm@...ck.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH 04/12] __wr_after_init: x86_64: __wr_op
On 19/12/2018 23:33, Igor Stoppa wrote:
> + if (WARN_ONCE(op >= WR_OPS_NUMBER, "Invalid WR operation.") ||
> + WARN_ONCE(!is_wr_after_init(dst, len), "Invalid WR range."))
> + return (void *)dst;
> +
> + offset = dst - (unsigned long)&__start_wr_after_init;
I forgot to remove the offset.
If the whole kernel memory is remapped, it is shifted by wr_poking_base.
I'll fix it in the next iteration.
> + wr_poking_addr = wr_poking_base + offset;
wr_poking_addr = wr_poking_base + dst;
--
igor
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