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[198.145.64.163]) by smtp.gmail.com with ESMTPSA id c201sm14550864pfc.73.2020.04.15.11.00.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 15 Apr 2020 11:00:14 -0700 (PDT) Date: Wed, 15 Apr 2020 11:00:13 -0700 From: Kees Cook To: Marco Elver Cc: Andrew Morton , cl@linux.com, iamjoonsoo.kim@lge.com, linux-mm@kvack.org, mm-commits@vger.kernel.org, penberg@kernel.org, rientjes@google.com, silvio.cesare@gmail.com, torvalds@linux-foundation.org, vnik@duasynt.com Subject: Re: [patch 025/155] slub: relocate freelist pointer to middle of object Message-ID: <202004151055.35E3F63CDB@keescook> References: <20200401210155.09e3b9742e1c6e732f5a7250@linux-foundation.org> <20200402040427.WyxceElzI%akpm@linux-foundation.org> <20200415164726.GA234932@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20200415164726.GA234932@google.com> X-Bogosity: Ham, tests=bogofilter, spamicity=0.003690, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Wed, Apr 15, 2020 at 06:47:26PM +0200, Marco Elver wrote: > With kernel v5.7-rc1 I am unable to boot when using the SLUB allocator > and red zoning (slub_debug=Z), but otherwise a default config. Bisect > points to this patch, and when reverting it, the kernel boots again. Okay, I believe this patch should fix the problem: https://lore.kernel.org/lkml/202004151054.BD695840@keescook -- Kees Cook