From: Peter Zijlstra <peterz@infradead.org>
To: Brendan Jackman <jackmanb@google.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>,
Alexander Potapenko <glider@google.com>,
Andrey Konovalov <andreyknvl@gmail.com>,
Dmitry Vyukov <dvyukov@google.com>,
Vincenzo Frascino <vincenzo.frascino@arm.com>,
Marco Elver <elver@google.com>, Ard Biesheuvel <ardb@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
Nathan Chancellor <nathan@kernel.org>,
Nick Desaulniers <nick.desaulniers+lkml@gmail.com>,
Bill Wendling <morbo@google.com>,
Justin Stitt <justinstitt@google.com>,
kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org,
llvm@lists.linux.dev
Subject: Re: [PATCH v3 1/3] kasan: mark !__SANITIZE_ADDRESS__ stubs __always_inline
Date: Tue, 16 Dec 2025 14:01:55 +0100 [thread overview]
Message-ID: <20251216130155.GD3707891@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <20251216-gcov-inline-noinstr-v3-1-10244d154451@google.com>
On Tue, Dec 16, 2025 at 10:16:34AM +0000, Brendan Jackman wrote:
> The x86 instrumented bitops in
> include/asm-generic/bitops/instrumented-non-atomic.h are
> KASAN-instrumented via explicit calls to instrument_* functions from
> include/linux/instrumented.h.
>
> This bitops are used from noinstr code in __sev_es_nmi_complete(). This
> code avoids noinstr violations by disabling __SANITIZE_ADDRESS__ etc for
> the compilation unit.
Yeah, so don't do that? That's why we use raw_atomic_*() in things like
smp_text_poke_int3_handler().
next prev parent reply other threads:[~2025-12-16 13:02 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-12-16 10:16 [PATCH v3 0/3] Noinstr fixes for K[CA]SAN with GCOV Brendan Jackman
2025-12-16 10:16 ` [PATCH v3 1/3] kasan: mark !__SANITIZE_ADDRESS__ stubs __always_inline Brendan Jackman
2025-12-16 13:01 ` Peter Zijlstra [this message]
2025-12-17 13:53 ` Brendan Jackman
2025-12-18 9:24 ` Peter Zijlstra
2025-12-19 11:45 ` Brendan Jackman
2026-01-04 6:07 ` Borislav Petkov
2025-12-16 10:16 ` [PATCH v3 2/3] kcsan: mark !__SANITIZE_THREAD__ " Brendan Jackman
2025-12-16 10:16 ` [PATCH v3 3/3] x86/sev: Disable GCOV on noinstr object Brendan Jackman
2026-01-05 9:47 ` [tip: x86/urgent] " tip-bot2 for Brendan Jackman
2025-12-16 10:18 ` [PATCH v3 0/3] Noinstr fixes for K[CA]SAN with GCOV Marco Elver
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