linux-kernel - [PATCH V2 0/2] Do not try to access unaccepted memory

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Message-Id: <20230911112114.91323-1-adrian.hunter@intel.com>
Date:   Mon, 11 Sep 2023 14:21:12 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        Borislav Petkov <bp@...en8.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Ard Biesheuvel <ardb@...nel.org>
Cc:     Dave Hansen <dave.hansen@...el.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Lorenzo Stoakes <lstoakes@...il.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Baoquan He <bhe@...hat.com>, Vivek Goyal <vgoyal@...hat.com>,
        Dave Young <dyoung@...hat.com>, linux-kernel@...r.kernel.org,
        linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
        linux-coco@...ts.linux.dev, linux-efi@...r.kernel.org,
        kexec@...ts.infradead.org
Subject: [PATCH V2 0/2] Do not try to access unaccepted memory

Hi

Support for unaccepted memory was added recently, refer commit
dcdfdd40fa82 ("mm: Add support for unaccepted memory"), whereby
a virtual machine may need to accept memory before it can be used.

Plug a few gaps where RAM is exposed without checking if it is
unaccepted memory.


Changes in V2:

      efi/unaccepted: Do not let /proc/vmcore try to access unaccepted memory
          Change patch subject and commit message
          Use vmcore_cb->.pfn_is_ram() instead of changing vmcore.c

      proc/kcore: Do not try to access unaccepted memory
          Change patch subject and commit message
          Do not open code pfn_is_unaccepted_memory()

      /dev/mem: Do not map unaccepted memory
          Patch dropped because it is not required


Adrian Hunter (2):
      efi/unaccepted: Do not let /proc/vmcore try to access unaccepted memory
      proc/kcore: Do not try to access unaccepted memory

 drivers/firmware/efi/unaccepted_memory.c | 20 ++++++++++++++++++++
 fs/proc/kcore.c                          |  3 ++-
 include/linux/mm.h                       |  7 +++++++
 3 files changed, 29 insertions(+), 1 deletion(-)


Regards
Adrian