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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=YmrRk5Ppmpmqc+Uhn8+9WvaDSzY/AIuZyaXSdzJWtoM=; b=IyJYsnstthx/DWoZEDJGoWjOa5A2XpI4eM6NIPp5apylEEztS8WIG6QNKiLLtY+h6N 8gidavYZ3PEARHzDip6v/5f9O49AXx7JsPaTWRYtmzUdEwXO5qu7kzd/3CEO2FqHt+DR 6uS6Mzp2gq9WfmWyKBK4ZKRzu5ZVV/O/6CbR9VYhe+1QW4xDlwBW0jtgrrnMzHtqINRd 59d1ZROiCiRRuu9zz2cGp1+NwFvi2v8NOgZzWOs46UYxTkKJQ26QcnrSgktmsItOp8s4 W1Yvljcmchaw7JQN3T+CeuW4Qwd/rvS0kDm8BX2I79KnxQZaUxHkKpGAVoaPOtOmcyuf LOQQ== X-Gm-Message-State: AO0yUKXSErcG0llogJSRKjyHHAmNiRK2dMcqFbwMk+kSRb/3KPKQKmWc o5a875A2Kl5sq6vu4RAcCY985NZKH1c8ZemepZw= X-Google-Smtp-Source: AK7set/XtEjr865OmIUz2fdOLIt+T4/XP6VEZTPI1iPAnkMOuvrqXWvwGziWlRY+bD2AtOI5OFZ3OYJLowmfDoH7mJg= X-Received: by 2002:a17:90a:fc2:b0:230:8094:4dcf with SMTP id 60-20020a17090a0fc200b0023080944dcfmr298909pjz.37.1675446707849; Fri, 03 Feb 2023 09:51:47 -0800 (PST) MIME-Version: 1.0 References: <20220610152141.2148929-1-catalin.marinas@arm.com> <66cc7277b0e9778ba33e8b22a4a51c19a50fe6f0.camel@mediatek.com> In-Reply-To: From: Andrey Konovalov Date: Fri, 3 Feb 2023 18:51:36 +0100 Message-ID: Subject: Re: [PATCH v2 0/4] kasan: Fix ordering between MTE tag colouring and page->flags To: =?UTF-8?B?S3Vhbi1ZaW5nIExlZSAo5p2O5Yag56mOKQ==?= Cc: =?UTF-8?B?UXVuLXdlaSBMaW4gKOael+e+pOW0tCk=?= , =?UTF-8?B?R3Vhbmd5ZSBZYW5nICjmnajlhYnkuJop?= , "linux-mm@kvack.org" , "kasan-dev@googlegroups.com" , "catalin.marinas@arm.com" , "ryabinin.a.a@gmail.com" , "linux-arm-kernel@lists.infradead.org" , "pcc@google.com" , "vincenzo.frascino@arm.com" , "will@kernel.org" Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: F3ABB40016 X-Stat-Signature: 93hjqbaqrrti4et61hf435rmufcqth38 X-HE-Tag: 1675446708-34837 X-HE-Meta: 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 t2cxHtsM 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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 Fri, Feb 3, 2023 at 4:41 AM Kuan-Ying Lee (=E6=9D=8E=E5=86=A0=E7=A9=8E) wrote: > > > Hi Kuan-Ying, > > > > There recently was a similar crash due to incorrectly implemented > > sampling. > > > > Do you have the following patch in your tree? > > > > > https://urldefense.com/v3/__https://android.googlesource.com/kernel/commo= n/*/9f7f5a25f335e6e1484695da9180281a728db7e2__;Kw!!CTRNKA9wMg0ARbw!hUjRlXir= PMSusdIWe0RIPt0PNqIHYDCJyd7GSd4o-TgLMP0CKRUkjElH-jcvtaz42-sgE2U58964rCCbuNT= JE5Jx$ > > > > > > If not, please sync your 6.1 tree with the Android common kernel. > > Hopefully this will fix the issue. > > > > Thanks! > > Hi Andrey, > > Thanks for your advice. > > I saw this patch is to fix ("kasan: allow sampling page_alloc > allocations for HW_TAGS"). > > But our 6.1 tree doesn't have following two commits now. > ("FROMGIT: kasan: allow sampling page_alloc allocations for HW_TAGS") > (FROMLIST: kasan: reset page tags properly with sampling) Hi Kuan-Ying, Just to clarify: these two patches were applied twice: once here on Jan 13: https://android.googlesource.com/kernel/common/+/a2a9e34d164e90fc08d35fd097= a164b9101d72ef https://android.googlesource.com/kernel/common/+/435e2a6a6c8ba8d0eb55f9aaad= e53e7a3957322b but then reverted here on Jan 20: https://android.googlesource.com/kernel/common/+/5503dbe454478fe54b9cac3fc5= 2d4477f52efdc9 https://android.googlesource.com/kernel/common/+/4573a3cf7e18735a4778454262= 38d46d96426bb6 And then once again via the link I sent before together with a fix on Jan 2= 5. It might be that you still have to former two patches in your tree if you synced it before the revert. However, if this is not the case: Which 6.1 commit is your tree based on? Do you have any private MTE-related changes in the kernel? Do you have userspace MTE enabled? Thanks!