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Tue, 09 Jun 2026 21:23:58 -0700 (PDT) From: Sanghyun Park To: bot+bpf-ci@kernel.org, Yonghong Song , Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko Cc: Sanghyun Park , Martin KaFai Lau , Eduard Zingerman , Song Liu , Kumar Kartikeya Dwivedi , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , Emil Tsalapatis , Puranjay Mohan , bpf@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH bpf-next v4] bpf: Fix use-after-free on mm_struct in bpf_find_vma() Date: Wed, 10 Jun 2026 13:23:00 +0900 Message-ID: <20260610042301.442045-2-sanghyun.park.cnu@gmail.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: References: Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit This looks like a separate pre-existing issue. This patch only fixes the mm_struct lifetime/UAF bug by pinning the foreign task's mm before using it. I can look into check_stable_address_space(mm) as a separate follow-up if maintainers think it is needed here. Thanks, Sanghyun