This is a note to let you know that I've just added the patch titled net: apple: bmac: don't call dev_kfree_skb() under spin_lock_irqsave() to the 5.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: net-apple-bmac-don-t-call-dev_kfree_skb-under-spin_l.patch and it can be found in the queue-5.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 20332f9d65362c31c393fde80c781634d1d452e9 Author: Yang Yingliang <yangyingliang@xxxxxxxxxx> Date: Thu Dec 8 21:37:35 2022 +0800 net: apple: bmac: don't call dev_kfree_skb() under spin_lock_irqsave() [ Upstream commit 5fe02e046e6422c4adfdbc50206ec7186077da24 ] It is not allowed to call kfree_skb() or consume_skb() from hardware interrupt context or with hardware interrupts being disabled. It should use dev_kfree_skb_irq() or dev_consume_skb_irq() instead. The difference between them is free reason, dev_kfree_skb_irq() means the SKB is dropped in error and dev_consume_skb_irq() means the SKB is consumed in normal. In this case, dev_kfree_skb() is called in bmac_tx_timeout() to drop the SKB, when tx timeout, so replace it with dev_kfree_skb_irq(). Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx> Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/net/ethernet/apple/bmac.c b/drivers/net/ethernet/apple/bmac.c index 1e4e402f07d7..dd6c44f5f925 100644 --- a/drivers/net/ethernet/apple/bmac.c +++ b/drivers/net/ethernet/apple/bmac.c @@ -1511,7 +1511,7 @@ static void bmac_tx_timeout(struct timer_list *t) i = bp->tx_empty; ++dev->stats.tx_errors; if (i != bp->tx_fill) { - dev_kfree_skb(bp->tx_bufs[i]); + dev_kfree_skb_irq(bp->tx_bufs[i]); bp->tx_bufs[i] = NULL; if (++i >= N_TX_RING) i = 0; bp->tx_empty = i;