This is a note to let you know that I've just added the patch titled Bluetooth: hci_bcsp: don't call kfree_skb() under spin_lock_irqsave() to the 4.9-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: bluetooth-hci_bcsp-don-t-call-kfree_skb-under-spin_l.patch and it can be found in the queue-4.9 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 0645d46ac7142190c1d2ac13c3b49396f2e654d4 Author: Yang Yingliang <yangyingliang@xxxxxxxxxx> Date: Wed Dec 7 10:18:33 2022 +0800 Bluetooth: hci_bcsp: don't call kfree_skb() under spin_lock_irqsave() [ Upstream commit 7b503e339c1a80bf0051ec2d19c3bc777014ac61 ] It is not allowed to call kfree_skb() from hardware interrupt context or with interrupts being disabled. So replace kfree_skb() with dev_kfree_skb_irq() under spin_lock_irqsave(). Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx> Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@xxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/bluetooth/hci_bcsp.c b/drivers/bluetooth/hci_bcsp.c index 26f9982bab26..2056d5c01afa 100644 --- a/drivers/bluetooth/hci_bcsp.c +++ b/drivers/bluetooth/hci_bcsp.c @@ -392,7 +392,7 @@ static void bcsp_pkt_cull(struct bcsp_struct *bcsp) i++; __skb_unlink(skb, &bcsp->unack); - kfree_skb(skb); + dev_kfree_skb_irq(skb); } if (skb_queue_empty(&bcsp->unack))