Messages in this thread | | | Subject | Re: [kernel-hardening] Re: [PATCH v6 03/11] mm, x86: Add support for eXclusive Page Frame Ownership (XPFO) | From | Dave Hansen <> | Date | Tue, 14 Nov 2017 16:37:34 -0800 |
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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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