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Wed, 07 May 2025 11:35:39 +0100 Date: Wed, 07 May 2025 11:35:38 +0100 Message-ID: <868qn8hfnp.wl-maz@kernel.org> From: Marc Zyngier To: Kees Cook Cc: Mostafa Saleh , kvmarm@lists.linux.dev, kasan-dev@googlegroups.com, linux-hardening@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, will@kernel.org, oliver.upton@linux.dev, broonie@kernel.org, catalin.marinas@arm.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, elver@google.com, andreyknvl@gmail.com, ryabinin.a.a@gmail.com, akpm@linux-foundation.org, yuzenghui@huawei.com, suzuki.poulose@arm.com, joey.gouly@arm.com, masahiroy@kernel.org, nathan@kernel.org, nicolas.schier@linux.dev Subject: Re: [PATCH v2 0/4] KVM: arm64: UBSAN at EL2 In-Reply-To: <202504301131.3C1CBCA8@keescook> References: <20250430162713.1997569-1-smostafa@google.com> <202504301131.3C1CBCA8@keescook> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/30.1 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: kees@kernel.org, smostafa@google.com, kvmarm@lists.linux.dev, kasan-dev@googlegroups.com, linux-hardening@vger.kernel.org, linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, will@kernel.org, oliver.upton@linux.dev, broonie@kernel.org, catalin.marinas@arm.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, elver@google.com, andreyknvl@gmail.com, ryabinin.a.a@gmail.com, akpm@linux-foundation.org, yuzenghui@huawei.com, suzuki.poulose@arm.com, joey.gouly@arm.com, masahiroy@kernel.org, nathan@kernel.org, nicolas.schier@linux.dev X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false On Wed, 30 Apr 2025 19:32:23 +0100, Kees Cook wrote: > > On Wed, Apr 30, 2025 at 04:27:07PM +0000, Mostafa Saleh wrote: > > Many of the sanitizers the kernel supports are disabled when running > > in EL2 with nvhe/hvhe/proctected modes, some of those are easier > > (and makes more sense) to integrate than others. > > Last year, kCFI support was added in [1] > > > > This patchset adds support for UBSAN in EL2. > > This touches both UBSAN and arm64 -- I'm happy to land this via the > hardening tree, but I expect the arm64 folks would rather take it via > their tree. What would people like to have happen? FWIW, I have now taken this in kvmarm/next. A stable branch is available at [1] for anyone to pull and resolve potential conflicts. Thanks, M. [1] https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git/log/?h=kvm-arm64/ubsan-el2 -- Without deviation from the norm, progress is not possible.