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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Pablo Neira Ayuso , Simon Horman Subject: [PATCH net v2] net: airoha: add RCU lock around dev_fill_forward_path Date: Fri, 20 Mar 2026 17:43:15 +0800 Message-ID: <20260320094315.525126-1-dqfext@gmail.com> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260320_024326_366849_9ADEE01D X-CRM114-Status: GOOD ( 10.02 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Since 0417adf367a0 ("ppp: fix race conditions in ppp_fill_forward_path") dev_fill_forward_path() should be called with RCU read lock held. This fix was applied to net, while the Airoha flowtable commit was applied to net-next, so it hadn't been an issue until net was merged into net-next. Fixes: a8bdd935d1dd ("net: airoha: Add wlan flowtable TX offload") Signed-off-by: Qingfang Deng --- v2: update fixes tag to the flowtable commit - https://lore.kernel.org/netdev/20260319032649.337812-1-dqfext@gmail.com/ drivers/net/ethernet/airoha/airoha_ppe.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/net/ethernet/airoha/airoha_ppe.c b/drivers/net/ethernet/airoha/airoha_ppe.c index ec5ce41dad80..02deb739a1c7 100644 --- a/drivers/net/ethernet/airoha/airoha_ppe.c +++ b/drivers/net/ethernet/airoha/airoha_ppe.c @@ -227,7 +227,9 @@ static int airoha_ppe_get_wdma_info(struct net_device *dev, const u8 *addr, if (!dev) return -ENODEV; + rcu_read_lock(); err = dev_fill_forward_path(dev, addr, &stack); + rcu_read_unlock(); if (err) return err; -- 2.43.0