Catalin Marinas ecc3c4795b arm64: Implement arch-specific pte_access_permitted() ... commit 6218f96c58 upstream. The generic pte_access_permitted() implementation only checks for pte_present() (together with the write permission where applicable). However, for both kernel ptes and PROT_NONE mappings pte_present() also returns true on arm64 even though such mappings are not user accessible. Additionally, arm64 now supports execute-only user permission (PROT_EXEC) which is implemented by clearing the PTE_USER bit. With this patch the arm64 implementation of pte_access_permitted() checks for the PTE_VALID and PTE_USER bits together with writable access if applicable. Reported-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2017-11-30 08:40:40 +00:00
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asm	arm64: Implement arch-specific pte_access_permitted()	2017-11-30 08:40:40 +00:00
uapi/asm	License cleanup: add SPDX license identifier to uapi header files with a license	2017-11-02 11:20:11 +01:00