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[35.245.46.111]) by smtp.gmail.com with ESMTPSA id 00721157ae682-884878de7b7sm31470857b3.29.2026.09.13.15.38.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 13 Sep 2026 15:38:38 -0700 (PDT) Date: Sun, 13 Sep 2026 18:38:37 -0400 From: Willem de Bruijn To: Mark Amirkan via B4 Relay , Willem de Bruijn , netdev@vger.kernel.org Cc: Paolo Abeni , "David S. Miller" , linux-kernel@vger.kernel.org, Jakub Kicinski , Jon Rosen , Simon Horman , Eric Dumazet Message-ID: In-Reply-To: <20260913-b4-send-packet-vnet-v1-1-5545ffb528ae@gmail.com> References: <20260913-b4-send-packet-vnet-v1-1-5545ffb528ae@gmail.com> Subject: Re: [PATCH net] net/packet: clear RX owner on VNET header error Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Mark Amirkan via B4 Relay wrote: > From: Mark Amirkan > > Commit 61fad6816fc1 ("net/packet: tpacket_rcv: avoid a producer race > condition") added rx_owner_map and made tpacket_rcv() claim a V1 or V2 > ring slot before converting the virtio-net header. If the conversion > fails, the drop path leaves the slot claimed. > > With a one-frame TPACKET_V2 ring, an unsupported UDP GSO packet leaves > the only slot unavailable, so the ring also drops the next valid packet. > > Clear the ownership bit on this error path. TPACKET_V3 already clears > its block state here. > > Fixes: 61fad6816fc1 ("net/packet: tpacket_rcv: avoid a producer race condition") > Cc: stable@vger.kernel.org > Assisted-by: Symbolic > Signed-off-by: Mark Amirkan Reviewed-by: Willem de Bruijn