On Wed, Mar 04, 2020 at 08:22:36PM +0100, Ard Biesheuvel wrote: > The wrong one, obviously :-) > > With Haswell, I get [before] > > [ 0.368541] 0x0000000000900000-0x0000000000a00000 1M > RW NX pte > [ 0.369118] 0x0000000000a00000-0x0000000080000000 2038M > RW PSE NX pmd > [ 0.369592] 0x0000000080000000-0x00000000b9800000 920M > pmd > [ 0.370177] 0x00000000b9800000-0x00000000b9856000 344K > pte ^^ so this is showing the region that didn't get mapped, so you did reproduce the issue. > [ 0.370649] 0x00000000b9856000-0x00000000b9a00000 1704K > RW NX pte > [ 0.371066] 0x00000000b9a00000-0x00000000baa00000 16M > ro PSE x pmd > > and after > > [ 0.349577] 0x0000000000a00000-0x0000000080000000 2038M > RW PSE NX pmd > [ 0.350049] 0x0000000080000000-0x00000000b9800000 920M > pmd > [ 0.350514] 0x00000000b9800000-0x00000000b9856000 344K > pte ^^ but it didn't get fixed :( This region should now be mapped properly with flags RW/NX. > [ 0.351013] 0x00000000b9856000-0x00000000b9a00000 1704K > RW NX pte > > so i'm still doing something wrong, I think? You're *sure* the after is actually after? There seems to be no change at all, the patch should have had some effect.
