• Andrey Ryabinin's avatar
    x86/mm/ptdump: Add address marker for KASAN shadow region · 025205f8
    Andrey Ryabinin authored
    Annotate the KASAN shadow with address markers in page table
    dump output:
    
    $ cat /sys/kernel/debug/kernel_page_tables
    ...
    
    ---[ Vmemmap ]---
    0xffffea0000000000-0xffffea0003000000          48M     RW         PSE     GLB NX pmd
    0xffffea0003000000-0xffffea0004000000          16M                               pmd
    0xffffea0004000000-0xffffea0005000000          16M     RW         PSE     GLB NX pmd
    0xffffea0005000000-0xffffea0040000000         944M                               pmd
    0xffffea0040000000-0xffffea8000000000         511G                               pud
    0xffffea8000000000-0xffffec0000000000        1536G                               pgd
    ---[ KASAN shadow ]---
    0xffffec0000000000-0xffffed0000000000           1T     ro                 GLB NX pte
    0xffffed0000000000-0xffffed0018000000         384M     RW         PSE     GLB NX pmd
    0xffffed0018000000-0xffffed0020000000         128M                               pmd
    0xffffed0020000000-0xffffed0028200000         130M     RW         PSE     GLB NX pmd
    0xffffed0028200000-0xffffed0040000000         382M                               pmd
    0xffffed0040000000-0xffffed8000000000         511G                               pud
    0xffffed8000000000-0xfffff50000000000        7680G                               pgd
    0xfffff50000000000-0xfffffbfff0000000     7339776M     ro                 GLB NX pte
    0xfffffbfff0000000-0xfffffbfff0200000           2M                               pmd
    0xfffffbfff0200000-0xfffffbfff0a00000           8M     RW         PSE     GLB NX pmd
    0xfffffbfff0a00000-0xfffffbffffe00000         244M                               pmd
    0xfffffbffffe00000-0xfffffc0000000000           2M     ro                 GLB NX pte
    ---[ KASAN shadow end ]---
    0xfffffc0000000000-0xffffff0000000000           3T                               pgd
    ---[ ESPfix Area ]---
    ...
    Signed-off-by: default avatarAndrey Ryabinin <aryabinin@virtuozzo.com>
    Reviewed-by: default avatarAlexander Potapenko <glider@google.com>
    Cc: Mark Rutland <mark.rutland@arm.com>
    Cc: kasan-dev@googlegroups.com
    Cc: Tobias Regnery <tobias.regnery@gmail.com>
    Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
    Cc: Dmitry Vyukov <dvyukov@google.com>
    Link: http://lkml.kernel.org/r/20170214100839.17186-2-aryabinin@virtuozzo.comSigned-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
    025205f8
dump_pagetables.c 12.2 KB