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Wed, 15 Apr 2026 10:23:29 -0700 (PDT) Message-ID: <2fbe2fc5-0e4d-4a87-93b7-9b23f8b3a16b@gmail.com> Date: Wed, 15 Apr 2026 10:22:06 -0700 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Cc: yuantan098@gmail.com, magnus.karlsson@intel.com, maciej.fijalkowski@intel.com, netdev@vger.kernel.org, bpf@vger.kernel.org, sdf@fomichev.me, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, ast@kernel.org, daniel@iogearbox.net, hawk@kernel.org, john.fastabend@gmail.com, bjorn@kernel.org, linux-kernel@vger.kernel.org, yifanwucs@gmail.com Subject: Re: [PATCH 1/1] xskmap: reject TX-only AF_XDP sockets To: Jason Xing , Linpu Yu References: <6584463e576b7bb3619dc302cfecfb8ca56bc86a.1774701288.git.linpu5433@gmail.com> From: Yuan Tan In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 4/15/2026 1:43 AM, Jason Xing wrote: > On Mon, Mar 30, 2026 at 3:33 AM Linpu Yu wrote: >> Reject TX-only AF_XDP sockets from XSKMAP updates. Redirected >> packets always enter the Rx path, where the kernel expects the >> selected socket to have an Rx ring. A TX-only socket can >> currently be inserted into an XSKMAP, and redirecting a packet >> to it crashes the kernel in xsk_generic_rcv(). >> >> Keep TX-only AF_XDP sockets valid for pure Tx use, but prevent >> them from being published through XSKMAP. >> >> Fixes: fbfc504a24f5 ("bpf: introduce new bpf AF_XDP map type BPF_MAP_TYPE_XSKMAP") >> Reported-by: Juefei Pu >> Reported-by: Yuan Tan >> Signed-off-by: Xin Liu >> Signed-off-by: Yifan Wu >> Signed-off-by: Linpu Yu > Hi Linpu, > > Any plan to post a v2 with our questions resolved? > > Thanks, > Jason Hi Jason, Linpu has an exam to take this week. He told he can try preparing the v2 patch this weekend. Best, Yuan