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Tue, 04 Jul 2023 08:30:01 -0700 (PDT) MIME-Version: 1.0 References: <20230628154714.GB22090@willie-the-truck> In-Reply-To: From: Andrey Konovalov Date: Tue, 4 Jul 2023 17:29:50 +0200 Message-ID: Subject: Re: HW-KASAN and CONFIG_SLUB_DEBUG_ON=y screams about redzone corruption To: Alexander Potapenko , Will Deacon Cc: catalin.marinas@arm.com, ryabinin.a.a@gmail.com, pcc@google.com, kasan-dev@googlegroups.com, linux-mm@kvack.org, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: 3A2272000B X-Rspam-User: X-Stat-Signature: wd19iuuu3uufe3nr6egj9xef4znnr3j9 X-Rspamd-Server: rspam03 X-HE-Tag: 1688484602-566634 X-HE-Meta: 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 WCbQEBPg ZzxVEYUxLgRGHV3O56MIgtMGqe056qAiwNjLXHdb5sLCtpAf5+iobNRiWubXJbFEe0VuA78rYA437FP+UoSvNcQX+7o+n0KcmmeqdyTvgVJqdU+0W/VvUzrGcbpBBDmJ05YAd1z1Rrz9XjqRvemJPnkazIl2BfGfmcuOK/ACc9xbJeO5DtlKSmLBuPioorYT8O2Xww9aUHy6fsuFNceOTHLh7fNRQGax7qDuNTOCi8ehacFFRD/+BSklie/5OLCJhExfp+BQkSjT0aXR31sEsZdO8yGRoYD32eqV77mWDAwNFz7Id7UdFvCUmxscjncj8eoffCz5vuFMLC4ZjyWNEoXJd98bAcbM5bb780SA/XEG2A6PkzyJ7HMcSU9WeqIZovqarfS4QovFJhqTPEehkRvhYcaoqKDzF9Dhu9SByFVByFCdmhLqsXdLa/t2kGMXLlIW/IeiG8n4t8oQ08eFpr/ygEvTFiVjHEt3bM/1iGOZI8ZU= 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 Tue, Jul 4, 2023 at 9:42=E2=80=AFAM Alexander Potapenko wrote: > > > While debugging something else, I ended up running v6.4 on an arm64 (v9= ) > > fastmodel with both CONFIG_SLUB_DEBUG_ON=3Dy and CONFIG_KASAN_HW_TAGS= =3Dy. > > This makes the system pretty unusable, as I see a tonne of kmalloc > > Redzone corruption messages pretty much straight out of startup (exampl= e > > below). I've reproduced the issue, looking into the root cause. > Does the problem reproduce with CONFIG_KASAN_SW_TAGS? Looks like SW_TAGS is not affected. > Also, any chance you could share the file:line info for the stack trace b= elow? > > I myself haven't expected KASAN to work together with SLUB_DEBUG... This was implemented at some point, so it should work. Thanks!