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Wed, 08 Jul 2026 15:41:32 -0700 (PDT) From: "Cen Zhang (Microsoft)" To: vadim.fedorenko@linux.dev Cc: AutonomousCodeSecurity@microsoft.com, blbllhy@gmail.com, davem@davemloft.net, edumazet@google.com, horms@kernel.org, jmaloy@redhat.com, kuba@kernel.org, kys@microsoft.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, pabeni@redhat.com, tgopinath@linux.microsoft.com, tipc-discussion@lists.sourceforge.net, tung.quang.nguyen@est.tech Subject: Re: [PATCH net v3] tipc: fix u16 MTU truncation in media and bearer MTU validation Date: Wed, 8 Jul 2026 18:41:29 -0400 Message-ID: <20260708224129.3722-1-blbllhy@gmail.com> X-Mailer: git-send-email 2.53.0 In-Reply-To: <7a6d7de8-7c33-42fd-a0f3-68bc1911b0e5@linux.dev> References: <7a6d7de8-7c33-42fd-a0f3-68bc1911b0e5@linux.dev> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sadly NLA_POLICY_MAX() cannot be used here -- its .max field is s16 instead of u16 in struct nla_policy, which will overflow to -1 during my testing. Please let me know if we have any other better choices. Otherwise, I'll prepare a patch adding .min check ( TIPC_MIN_BEARER_MTU).