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Tue, 10 Nov 2026 07:29:01 -0800 (PST) Received: from localhost.localdomain ([116.88.205.165]) by smtp.gmail.com with ESMTPSA id a92af1059eb24-1b3b5b4b90csm7232376c88.14.2026.11.10.07.28.57 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Tue, 10 Nov 2026 07:28:59 -0800 (PST) From: CMGS To: netdev-bot+sashiko@kernel.org Cc: netdev@vger.kernel.org, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@kernel.org, kuba@kernel.org, pabeni@redhat.com, kuniyu@google.com Subject: Re: [PATCH net] vxlan: reset the remote's dst cache when snooping moves a MAC Date: Tue, 10 Nov 2026 23:28:53 +0800 Message-ID: <20261110152853.6223-1-ilskdw@gmail.com> X-Mailer: git-send-email 2.54.0 In-Reply-To: <179432251224.994134.6565482770882182020@kernel.org> References: <20261106144406.66035-1-ilskdw@gmail.com> <179432251224.994134.6565482770882182020@kernel.org> X-Mailing-List: netdev@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit > [Severity: High] > Should this branch also update rdst->remote_ifindex and clear > rdst->offloaded, as vxlan_fdb_replace() does? Yes. The early return compares remote_ifindex and vxlan_xmit_one() uses it as the oif, so leaving it stale can refill the cache with a route for the previous interface, and with this patch every later packet from that peer would reset the cache. v2 will set remote_ifindex and clear offloaded in the same branch, as vxlan_fdb_replace() does. > [Severity: Low] > Can a concurrent transmitter still cache a route to the previous remote > after this reset? The window exists, but it is the same one vxlan_fdb_replace() and the other dst_cache users that reset after a parameter change have. Closing it needs a change to dst_cache invalidation, which is out of scope for this fix. pw-bot: cr