Re: [PATCH 0/3] x86, kasan: add KASAN checks to atomic operations

Andrew Morton
2017-03-30T22:30:21Z

On Tue, 14 Mar 2017 20:24:11 +0100 Dmitry Vyukov <dvyukov@google.com> wrote:

> KASAN uses compiler instrumentation to intercept all memory accesses.
> But it does not see memory accesses done in assembly code.
> One notable user of assembly code is atomic operations. Frequently,
> for example, an atomic reference decrement is the last access to an
> object and a good candidate for a racy use-after-free.

I'm getting a pile of build errors from this patchset (and related
patches). Due to messed up merge fixing, probably. Please the review
process has been a bit bumpy.

So I'll drop

kasan-allow-kasan_check_read-write-to-accept-pointers-to-volatiles.patch
asm-generic-x86-wrap-atomic-operations.patch
asm-generic-x86-wrap-atomic-operations-fix.patch
asm-generic-add-kasan-instrumentation-to-atomic-operations.patch
asm-generic-fix-compilation-failure-in-cmpxchg_double.patch
x86-remove-unused-atomic_inc_short.patch
x86-asm-generic-add-kasan-instrumentation-to-bitops.patch

for now. Please resend (against -mm or linux-next) when the dust has
settled.