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Tue, 27 Oct 2026 15:10:05 -0700 (PDT) Message-ID: <968e7fce-a027-4c4e-8a3f-79ddf0b2ba9d@gmail.com> Date: Tue, 27 Oct 2026 23:10:04 +0100 X-Archived-By: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] fs/proc/task_mmu: fix missed VMAs when reading /proc/PID/maps and friends To: "Lorenzo Stoakes (ARM)" , Andrew Morton , "Liam R. Howlett" , Vlastimil Babka , Jann Horn , Pedro Falcato , Suren Baghdasaryan , Shakeel Butt , SJ Park Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, stable@vger.kernel.org, "David Hildenbrand (Arm)" References: <20261027-fix-proc-pid-maps-missing-vmas-v2-1-2791cc9fc95f@kernel.org> Content-Language: en-US From: "Jose A. Perez de Azpillaga" In-Reply-To: <20261027-fix-proc-pid-maps-missing-vmas-v2-1-2791cc9fc95f@kernel.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Queue-Id: 5FD9080012 X-Stat-Signature: 1xzwjdf5ti8cndry9gf4hcyfb9dwbc11 X-Rspamd-Server: rspam01 X-Spam-Status: No, score=-9.3 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_PASS,SPF_PASS,USER_AGENT_SANE_1 autolearn=ham autolearn_force=no version=4.0.1 X-HE-Tag: 1793139008-320794 X-HE-Meta: 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 80kBl6Ub 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: X-Spam-Checker-Version: SpamAssassin 4.0.1 (2024-03-26) on aws-us-west-2-korg-listserv-alma10-1 On 10/27/26 3:08 PM, Lorenzo Stoakes (ARM) wrote: [snip] > + if (from_addr < vma->vm_start && > + vma_rcu_iter_may_have_skipped(rvmi, from_addr, vma->vm_start - 1)) > + goto fallback_unlock; the helpers make this a lot easier to follow than v1 :) I re-tested v2 on x86_64 in qemu with KASAN, as in v1. So, this LGTM: Reviewed-by: Jose A. Perez de Azpillaga Tested-by: Jose A. Perez de Azpillaga -- cheers, jose a. p-a