On Tue, 2019-08-20 at 10:00 -0400, Song Liu wrote: > > From 9ae74cff4faf4710a11cb8da4c4a3f3404bd9fdd Mon Sep 17 00:00:00 > 2001 > From: Song Liu <[email protected]> > Date: Mon, 19 Aug 2019 23:59:47 -0700 > Subject: [PATCH] x86/mm/pti: in pti_clone_pgtable(), increase addr > properly > > Before 32-bit support, pti_clone_pmds() always adds PMD_SIZE to addr. > This behavior changes after the 32-bit support: pti_clone_pgtable() > increases addr by PUD_SIZE for pud_none(*pud) case, and increases > addr by > PMD_SIZE for pmd_none(*pmd) case. However, this is not accurate > because > addr may not be PUD_SIZE/PMD_SIZE aligned. > > Fix this issue by properly rounding up addr to next PUD_SIZE/PMD_SIZE > in these two cases. > > Cc: [email protected] # v4.19+ > Fixes: 16a3fe634f6a ("x86/mm/pti: Clone kernel-image on PTE level for > 32 bit") > Signed-off-by: Song Liu <[email protected]> > Cc: Joerg Roedel <[email protected]> > Cc: Thomas Gleixner <[email protected]> > Cc: Dave Hansen <[email protected]> > Cc: Andy Lutomirski <[email protected]> > Cc: Peter Zijlstra <[email protected]>
This looks like it should do the trick! Reviewed-by: Rik van Riel <[email protected]> -- All Rights Reversed.
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