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Tue, 11 Nov 2025 01:03:13 -0800 (PST) MIME-Version: 1.0 References: <0a21096d806eafa679798b9844ec33bf8a5499a4.1761763681.git.m.wieczorretman@pm.me> In-Reply-To: <0a21096d806eafa679798b9844ec33bf8a5499a4.1761763681.git.m.wieczorretman@pm.me> From: Alexander Potapenko Date: Tue, 11 Nov 2025 10:02:36 +0100 X-Gm-Features: AWmQ_bncs5LVtJN1ReProGRqJJIZk54xNH4kh3rOCX8uWFHvQkLT6YYoepdGREs Message-ID: Subject: Re: [PATCH v6 16/18] arm64: Unify software tag-based KASAN inline recovery path To: Maciej Wieczor-Retman Cc: xin@zytor.com, peterz@infradead.org, kaleshsingh@google.com, kbingham@kernel.org, akpm@linux-foundation.org, nathan@kernel.org, ryabinin.a.a@gmail.com, dave.hansen@linux.intel.com, bp@alien8.de, morbo@google.com, jeremy.linton@arm.com, smostafa@google.com, kees@kernel.org, baohua@kernel.org, vbabka@suse.cz, justinstitt@google.com, wangkefeng.wang@huawei.com, leitao@debian.org, jan.kiszka@siemens.com, fujita.tomonori@gmail.com, hpa@zytor.com, urezki@gmail.com, ubizjak@gmail.com, ada.coupriediaz@arm.com, nick.desaulniers+lkml@gmail.com, ojeda@kernel.org, brgerst@gmail.com, elver@google.com, pankaj.gupta@amd.com, mark.rutland@arm.com, trintaeoitogc@gmail.com, jpoimboe@kernel.org, thuth@redhat.com, pasha.tatashin@soleen.com, dvyukov@google.com, jhubbard@nvidia.com, catalin.marinas@arm.com, yeoreum.yun@arm.com, mhocko@suse.com, lorenzo.stoakes@oracle.com, samuel.holland@sifive.com, vincenzo.frascino@arm.com, bigeasy@linutronix.de, surenb@google.com, ardb@kernel.org, Liam.Howlett@oracle.com, nicolas.schier@linux.dev, ziy@nvidia.com, kas@kernel.org, tglx@linutronix.de, mingo@redhat.com, broonie@kernel.org, corbet@lwn.net, andreyknvl@gmail.com, maciej.wieczor-retman@intel.com, david@redhat.com, maz@kernel.org, rppt@kernel.org, will@kernel.org, luto@kernel.org, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, x86@kernel.org, linux-kbuild@vger.kernel.org, linux-mm@kvack.org, llvm@lists.linux.dev, linux-doc@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: F083B16000C X-Stat-Signature: horua9317ykektqaayn9ynx75cty9tfg X-Rspam-User: X-HE-Tag: 1762851794-318210 X-HE-Meta: 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 LtItLEQL nXzP3Mk+FRnkog/jwDHnxN6P0o3m5D1+FdHWZXK9ccMtm0fzuezYcayQQByr4FFm4laC5udR0nAFrwTnxV7DpO3/iQmL84KWQdDwmst1DLEf6bwcuS/UPhKHgTA5QhicQO5e26NpXG1ED2FnbFJqYscM/xY7FIpla3pasD5a8yiOHG9yrjLs/yCOLuNGuomnpd0B/8iyddfFuQMCL3VGxlAIFX/1i9SeT5LVyDkHSrJMkttygLabbgYdyFuyBsXuEP64+5PkOui4A1YFZf6FG3qvrLnLbsCHF5K21Eg0wFjbxY2eHEVob0tWJ39NU7UomUC7x62cd5/m6tTsxrDMUFFuVA9OQIlEu06aYOWDvCTGwzzGNfPw4254wvvUak4/OTxmKW9aVN9NNSwNSNeNexmLORQ== 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: List-Subscribe: List-Unsubscribe: On Wed, Oct 29, 2025 at 9:10=E2=80=AFPM Maciej Wieczor-Retman wrote: > > From: Maciej Wieczor-Retman > > To avoid having a copy of a long comment explaining the intricacies of > the inline KASAN recovery system and issues for every architecture that > uses the software tag-based mode, a unified kasan_die_unless_recover() > function was added. > > Use kasan_die_unless_recover() in the kasan brk handler to cleanup the > long comment, that's kept in the non-arch KASAN code. > > Signed-off-by: Maciej Wieczor-Retman > Acked-by: Catalin Marinas Acked-by: Alexander Potapenko