Re: [PATCH net v2] net: airoha: add RCU lock around dev_fill_forward_path
From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: 2026-03-20 09:54:41
Also in:
linux-arm-kernel, linux-mediatek, lkml
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 <dqfext@gmail.com>My acked-by tag is still valid. Acked-by: Lorenzo Bianconi <lorenzo@kernel.org>
quoted hunk ↗ jump to hunk
--- v2: update fixes tag to the flowtable commit - https://lore.kernel.org/netdev/20260319032649.337812-1-dqfext@gmail.com/ (local) 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
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