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b=oeIXtBkE3A5Lq2mlir6pP/PdAqoOEAqfMo/wK0x4C107XHmtPGKlJfJvbPlDeAVht uGvfAw2E8GxgcDo9kqBuuX9oYCaCXgRRImmxDlO8dFYQB86C0Uf9wYVS1NOgSowfF5 m5nLi5oOg+2vAjRUz/8y4wsB0zRcoK0VPpcfjGidXzZHhgw8X48oCZRJ1NngtIJoJh tp7RvK5lLTtHDgueVMw0pcGve4dP1ZcaBW6wOUiBBSCWSuTDSpLVGQtqVP9M0Q1OhL h9A4K+yzPxth537CM9GHWQ32wlZpx/JlSrtTSkzYwjViyAjYssik1I3v2jzGaiRcNh 1dcGOPXXqx9xg== From: SJ Park To: SJ Park Cc: Andrew Morton , stable@vger.kernel.org, Brendan Higgins , David Gow , Fernand Sieber , Leonard Foerster , Quanmin Yan , SeongJae Park , Shakeel Butt , damon@lists.linux.dev, kunit-dev@googlegroups.com, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, linux-mm@kvack.org Subject: Re: [PATCH v1.1 0/6] mm/damon: unurgent fixes for infinite loop, NULL de-ref and races Date: Tue, 14 Jul 2026 20:33:25 -0700 Message-ID: <20260715033325.109466-1-sj@kernel.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260715031002.108504-1-sj@kernel.org> References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Stat-Signature: of7dydxzx3jypkmomki9whzzf5nxd4ys X-Rspamd-Queue-Id: 739B4C0002 X-Rspam-User: X-Rspamd-Server: rspam07 X-HE-Tag: 1784086410-63331 X-HE-Meta: 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 /bqiBXe8 uSXQEufaqnhv107uhc8R86I9CulXHVeSakRIBvYzKpxCIx21Gyi/mT68R/F3LmwbjpeJ9Y0Kv86xrgtYPTXrruF0YCFdv82n3zoz1KfrxLBXf219Ya3cV1r9zqFVKWog6gJWsnNwTrNGWIMReaX6IBQNZKXrhZtKUpBoT3tdaxGTzZDRAKIkRWeAWP6n+1p/q7emXJ/pU/Z7e3VKnTedmNy91ljcuho2xTVCEUpcoKS/EVEA= Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, 14 Jul 2026 20:09:55 -0700 SJ Park wrote: > Sashiko found a few issues in DAMON that could cause infinite loop, NULL > dereference and monitoring results degradation. The first two sounds > scary but the infinite loop happens only under unreasonable user setup. > The NULL dereference is only in a unit test. Monitoring results > degradation is trivial since it is only best-effort, and those happens > from only unlikely races. Still those are bugs that better to fix if > possible. Fix those. Sashiko found no blocker for this series. Sashiko sent findings to damon@ mailing list [1], and I replied to all the comments. Please read those for details. [1] https://lore.kernel.org/damon/ Thanks, SJ [...]