Date: Tue, 14 Nov 2017 16:37:34 -0800 From: Dave Hansen <dave.hansen@...el.com> To: Tycho Andersen <tycho@...ho.ws> Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org, kernel-hardening@...ts.openwall.com, Marco Benatto <marco.antonio.780@...il.com>, Juerg Haefliger <juerg.haefliger@...onical.com>, x86@...nel.org Subject: Re: Re: [PATCH v6 03/11] mm, x86: Add support for eXclusive Page Frame Ownership (XPFO) On 11/14/2017 04:33 PM, Tycho Andersen wrote: >> >> void set_bh_page(struct buffer_head *bh, >> ... >> bh->b_data = page_address(page) + offset; > Ah, yes. I guess there will be many bugs like this :). Anyway, I'll > try to cook up a patch. It won't catch all the bugs, but it might be handy to have a debugging mode that records the location of the last user of page_address() and friends. That way, when we trip over an unmapped page, we have an easier time finding the offender.
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