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Wed, 01 Apr 2026 17:07:30 -0700 (PDT) From: Ritesh Harjani (IBM) To: Sourabh Jain , linuxppc-dev@lists.ozlabs.org Cc: Sourabh Jain , Aditya Gupta , Daniel Axtens , Hari Bathini , Madhavan Srinivasan , Mahesh Salgaonkar , Michael Ellerman , Shivang Upadhyay , Venkat Rao Bagalkote , Aboorva Devarajan Subject: Re: [PATCH 2/2] powerpc/kexec: Disable KASAN for VMX helpers used in MMU-off path In-Reply-To: Date: Thu, 02 Apr 2026 05:34:40 +0530 Message-ID: References: <20260321053121.614022-1-sourabhjain@linux.ibm.com> <20260321053121.614022-2-sourabhjain@linux.ibm.com> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list Ritesh Harjani (IBM) writes: > Sourabh Jain writes: > >> The kexec sequence invokes enter_vmx_ops() and exit_vmx_ops() with the >> MMU disabled. In this context, code must not rely on normal virtual >> address translations or trigger page faults. >> With KASAN enabled, these functions get instrumented and may access You said "may access", so just curious that, do you see an issue always with KASAN + Kexec or is it only with a specific configuration? -ritesh