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| author | Adrian Hunter <adrian.hunter@intel.com> | 2023-09-11 13:21:14 +0200 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2023-10-04 19:32:22 +0200 |
| commit | e538a582097878c536c68002c79722e4a037c080 (patch) | |
| tree | 00f5c86426f41bf79ce70f4e461b984824b9c1e6 /mm/internal.h | |
| parent | efi/unaccepted: do not let /proc/vmcore try to access unaccepted memory (diff) | |
| download | linux-e538a582097878c536c68002c79722e4a037c080.tar.xz linux-e538a582097878c536c68002c79722e4a037c080.zip | |
proc/kcore: do not try to access unaccepted memory
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.
Do not try to access unaccepted memory because it can cause the guest to
fail.
For /proc/kcore, which is read-only and does not support mmap, this means a
read of unaccepted memory will return zeros.
Link: https://lkml.kernel.org/r/20230911112114.91323-3-adrian.hunter@intel.com
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Baoquan He <bhe@redhat.com>
Cc: Borislav Petkov (AMD) <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Dave Young <dyoung@redhat.com>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Lorenzo Stoakes <lstoakes@gmail.com>
Cc: Mike Rapoport <rppt@linux.ibm.com>
Cc: Tom Lendacky <thomas.lendacky@amd.com>
Cc: Vivek Goyal <vgoyal@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'mm/internal.h')
0 files changed, 0 insertions, 0 deletions