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Tue, 26 May 2026 22:18:12 -0700 (PDT) From: Muhammad Bilal To: pmenzel@molgen.mpg.de Cc: linux-bluetooth@vger.kernel.org, marcel@holtmann.org, luiz.dentz@gmail.com, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: Re: [PATCH v1 1/1] Bluetooth: L2CAP: fix heap over-read in l2cap_get_conf_opt Date: Wed, 27 May 2026 05:18:07 +0000 Message-ID: <20260527051808.47220-1-meatuni001@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <51761fe5-2244-457b-bf60-060e43f0cbd1@molgen.mpg.de> References: <51761fe5-2244-457b-bf60-060e43f0cbd1@molgen.mpg.de> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Thanks for the review. > By any chance, do you have a reproducer? No standalone reproducer is available. The issue can be triggered by a malformed L2CAP configuration request where opt->len exceeds the remaining buffer, i.e. a crafted packet from a remote peer. > I always wonder, if Linux should log a debug message or even warning. Existing callers generally handle malformed configuration options by silently aborting parsing, so I followed the same pattern. Adding a BT_ERR() on -EINVAL could be reasonable; I can include that in a v2 if preferred. Regards, Muhammad Bilal