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ARM: 8737/1: mm: dump: add checking for writable and executable

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Page mappings with full RWX permissions are a security risk.
x86, arm64 has an option to walk the page tables
and dump any bad pages.

(1404d6f13e
("arm64: dump: Add checking for writable and exectuable pages"))
Add a similar implementation for arm.

Reviewed-by: Kees Cook <keescook@chromium.org>
Tested-by: Laura Abbott <labbott@redhat.com>
Reviewed-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Jinbum Park <jinb.park7@gmail.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Jinbum Park 2017-12-12 01:43:57 +01:00 • committed by Russell King
commit a8e53c151f
4 changed files with 94 additions and 1 deletions
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