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Wed, 16 Jul 2025 15:21:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1752679284; bh=p2u05dLVtqQJ3foGrWJXooMdrDiQBdBaUfjuYdOfRI8=; h=Subject:From:Date:References:In-Reply-To:To:Cc:From; b=GXNZqmiM3oopAWeII/q3vlE8pvrAug8t7A6wOb+mZy/DJcXF/RELXBzf30puyUdIf PEw3d7vZ5vmLIX2Xq09I4ZyXuSbI+5Pb8N8RV42b//+EXK/W3DbyLLQ0pOHTYanHAY JX92xf8rrx7lZTC1MHYEAbzX2ArWb5myVqPJ8Y5D5R4cukMaQcrRysKjKUP32iu5Et 0ia8x2NEVTIQyrzRq0MEJ91tTnQFlcvFQ0p79hJ/naQEIGYFF6FVO33VJmuPXKLqVn Dk+2KGtpQmzs4PjxM/G+VrGjhCvYY+0TvMLLvdNb0bqZPI1fta3xN4Eas7KfSsVOMd atDjSa1cvJyqA== Received: from [10.30.226.235] (localhost [IPv6:::1]) by aws-us-west-2-korg-oddjob-rhel9-1.codeaurora.org (Postfix) with ESMTP id 2B757383BA33; Wed, 16 Jul 2025 15:21:46 +0000 (UTC) Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Subject: Re: [PATCH v4 1/1] mm/rmap: fix potential out-of-bounds page table access during batched unmap From: patchwork-bot+linux-riscv@kernel.org Message-Id: <175267930477.1224517.13373842337541537594.git-patchwork-notify@kernel.org> Date: Wed, 16 Jul 2025 15:21:44 +0000 References: <20250701143100.6970-1-lance.yang@linux.dev> In-Reply-To: <20250701143100.6970-1-lance.yang@linux.dev> To: Lance Yang Cc: linux-riscv@lists.infradead.org, akpm@linux-foundation.org, david@redhat.com, 21cnbao@gmail.com, baolin.wang@linux.alibaba.com, chrisl@kernel.org, kasong@tencent.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lorenzo.stoakes@oracle.com, ryan.roberts@arm.com, v-songbaohua@oppo.com, x86@kernel.org, huang.ying.caritas@gmail.com, zhengtangquan@oppo.com, riel@surriel.com, Liam.Howlett@oracle.com, vbabka@suse.cz, harry.yoo@oracle.com, mingzhe.yang@ly.com, stable@vger.kernel.org, baohua@kernel.org, lance.yang@linux.dev X-Stat-Signature: odkpqdzaaycfxnzdrzu96nontczutisf X-Rspam-User: X-Rspamd-Queue-Id: 06E4F180011 X-Rspamd-Server: rspam02 X-HE-Tag: 1752679285-760867 X-HE-Meta: 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 Vss8zERo 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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: List-Subscribe: List-Unsubscribe: Hello: This patch was applied to riscv/linux.git (fixes) by Andrew Morton : On Tue, 1 Jul 2025 22:31:00 +0800 you wrote: > From: Lance Yang > > As pointed out by David[1], the batched unmap logic in try_to_unmap_one() > may read past the end of a PTE table when a large folio's PTE mappings > are not fully contained within a single page table. > > While this scenario might be rare, an issue triggerable from userspace must > be fixed regardless of its likelihood. This patch fixes the out-of-bounds > access by refactoring the logic into a new helper, folio_unmap_pte_batch(). > > [...] Here is the summary with links: - [v4,1/1] mm/rmap: fix potential out-of-bounds page table access during batched unmap https://git.kernel.org/riscv/c/ddd05742b45b You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html