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bh=2bi/yWCYSEbTwdoD+ZRnucs0IxsKcEa74FkUlbYIl8w=; h=Date:From:To:Cc:Subject:In-Reply-To:References:From; b=wfU526QeHtT25Dp80XTfipC5chr8bRteULrVAX3GXOkya9cbsZIy8wrbQ6brmYz0F vDGtdvSGZRQfERjweZU4px5C7Ix57ztsuDbAmmGFSywUjlhFzG0KOqtrvPm17eZhaV 02GCDMBiwBb7OPcfnJtFBFIWpxTHuJ9C+PSjF7U4= Date: Thu, 26 Jan 2023 15:20:24 -0800 From: Andrew Morton To: Christophe Leroy Cc: Andrey Ryabinin , Alexander Potapenko , Andrey Konovalov , Dmitry Vyukov , Vincenzo Frascino , linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-mm@kvack.org, kasan-dev@googlegroups.com, Nathan Lynch , Michael Ellerman Subject: Re: [PATCH] kasan: Fix Oops due to missing calls to kasan_arch_is_ready() Message-Id: <20230126152024.bfdd25de2ff5107fa7c02986@linux-foundation.org> In-Reply-To: <150768c55722311699fdcf8f5379e8256749f47d.1674716617.git.christophe.leroy@csgroup.eu> References: <150768c55722311699fdcf8f5379e8256749f47d.1674716617.git.christophe.leroy@csgroup.eu> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 9133EC0012 X-Rspam-User: X-Stat-Signature: gzm55pg1nm11kjepsqydun8fgoqen5pn X-HE-Tag: 1674775228-8047 X-HE-Meta: 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 37TzI75d 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, 26 Jan 2023 08:04:47 +0100 Christophe Leroy wrote: > On powerpc64, you can build a kernel with KASAN as soon as you build it > with RADIX MMU support. However if the CPU doesn't have RADIX MMU, > KASAN isn't enabled at init and the following Oops is encountered. Should we backport to -stable? If so, can we identify a suitable Fixes: target? Thanks.