• Kees Cook's avatar
    arm: Implement thread_struct whitelist for hardened usercopy · 08626a60
    Kees Cook authored
    While ARM32 carries FPU state in the thread structure that is saved and
    restored during signal handling, it doesn't need to declare a usercopy
    whitelist, since existing accessors are all either using a bounce buffer
    (for which whitelisting isn't checking the slab), are statically sized
    (which will bypass the hardened usercopy check), or both.
    Cc: Russell King <linux@armlinux.org.uk>
    Cc: Ingo Molnar <mingo@kernel.org>
    Cc: Christian Borntraeger <borntraeger@de.ibm.com>
    Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
    Cc: linux-arm-kernel@lists.infradead.org
    Signed-off-by: default avatarKees Cook <keescook@chromium.org>