Robin Murphy 2e985d2647 arm64: Use pointer masking to limit uaccess speculation ... Commit 4d8efc2d5e upstream. Similarly to x86, mitigate speculation past an access_ok() check by masking the pointer against the address limit before use. Even if we don't expect speculative writes per se, it is plausible that a CPU may still speculate at least as far as fetching a cache line for writing, hence we also harden put_user() and clear_user() for peace of mind. Signed-off-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2018-02-16 20:22:51 +01:00
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asm	arm64: Use pointer masking to limit uaccess speculation	2018-02-16 20:22:51 +01:00
uapi/asm	License cleanup: add SPDX license identifier to uapi header files with a license	2017-11-02 11:20:11 +01:00