arm64: futex: Mask __user pointers prior to dereference

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The arm64 futex code has some explicit dereferencing of user pointers
where performing atomic operations in response to a futex command. This
patch uses masking to limit any speculative futex operations to within
the user address space.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

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Will Deacon 2018-02-05 15:34:24 +00:00 • committed by Catalin Marinas

parent f71c2ffcb2

commit 91b2d3442f

1 changed files with 6 additions and 3 deletions

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arch/arm64/include/asm/futex.h

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