• Chao Fan's avatar
    x86/boot/KASLR: Limit KASLR to extract the kernel in immovable memory only · 690eaa53
    Chao Fan authored
    KASLR may randomly choose a range which is located in movable memory
    regions. As a result, this will break memory hotplug and make the
    movable memory chosen by KASLR immovable.
    Therefore, limit KASLR to choose memory regions in the immovable range
    after consulting the SRAT table.
     [ bp:
        - Rewrite commit message.
        - Trim comments.
    Signed-off-by: default avatarChao Fan <fanc.fnst@cn.fujitsu.com>
    Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
    Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
    Cc: Baoquan He <bhe@redhat.com>
    Cc: caoj.fnst@cn.fujitsu.com
    Cc: Dave Hansen <dave.hansen@linux.intel.com>
    Cc: "H. Peter Anvin" <hpa@zytor.com>
    Cc: indou.takao@jp.fujitsu.com
    Cc: Ingo Molnar <mingo@redhat.com>
    Cc: Juergen Gross <jgross@suse.com>
    Cc: kasong@redhat.com
    Cc: Kees Cook <keescook@chromium.org>
    Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
    Cc: msys.mizuma@gmail.com
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: Tom Lendacky <thomas.lendacky@amd.com>
    Cc: x86-ml <x86@kernel.org>
    Link: https://lkml.kernel.org/r/20190123110850.12433-8-fanc.fnst@cn.fujitsu.com