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[34.76.69.250]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-4601f2dc577sm49241280f8f.3.2026.06.07.22.31.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 07 Jun 2026 22:31:43 -0700 (PDT) From: David Maximiliano Hermitte To: paul@paul-moore.com Cc: jmorris@namei.org, serge@hallyn.com, viro@zeniv.linux.org.uk, brauner@kernel.org, jack@suse.cz, linux-security-module@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, David Maximiliano Hermitte Subject: security_inode_follow_link: KASAN UAF localization report Date: Mon, 8 Jun 2026 05:31:25 +0000 Message-ID: <20260608053125.1088564-1-davemadmaxxx@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hello, I reproduced this issue locally in a QEMU/TCG VM and I can confirm a valid BEFORE signal. Summary of the local evidence: - Reproducer started: yes - KASAN seen: yes - use-after-free seen: yes - target function seen: security_inode_follow_link - target file seen: security/security.c - Call Trace seen: yes - RIP seen: yes - BEFORE validation: true At this point I am treating this as a localization report, not as a final patch submission. The trace points to the security_inode_follow_link / link-follow path. I would prefer not to guess the final fix, since I do not yet have a validated AFTER patch for this issue. I can provide the reproducer evidence and retest any proposed patch if helpful. Thanks, David