This is a note to let you know that I've just added the patch titled
net: plip: don't call kfree_skb/dev_kfree_skb() under spin_lock_irq()
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:
net-plip-don-t-call-kfree_skb-dev_kfree_skb-under-sp.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 875ae531d27b466f19e5cf9f0b2382799ae04761
Author: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Date: Wed Dec 7 09:53:10 2022 +0800
net: plip: don't call kfree_skb/dev_kfree_skb() under spin_lock_irq()
[ Upstream commit 7d8c19bfc8ff3f78e5337107ca9246327fcb6b45 ]
It is not allowed to call kfree_skb() or consume_skb() from
hardware interrupt context or with interrupts being disabled.
So replace kfree_skb/dev_kfree_skb() with dev_kfree_skb_irq()
and dev_consume_skb_irq() under spin_lock_irq().
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Yang Yingliang <yangyingliang@xxxxxxxxxx>
Reviewed-by: Jiri Pirko <jiri@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20221207015310.2984909-1-yangyingliang@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/plip/plip.c b/drivers/net/plip/plip.c
index 9c4b41a4df7d..061894ba271c 100644
--- a/drivers/net/plip/plip.c
+++ b/drivers/net/plip/plip.c
@@ -449,12 +449,12 @@ plip_bh_timeout_error(struct net_device *dev, struct net_local *nl,
}
rcv->state = PLIP_PK_DONE;
if (rcv->skb) {
- kfree_skb(rcv->skb);
+ dev_kfree_skb_irq(rcv->skb);
rcv->skb = NULL;
}
snd->state = PLIP_PK_DONE;
if (snd->skb) {
- dev_kfree_skb(snd->skb);
+ dev_consume_skb_irq(snd->skb);
snd->skb = NULL;
}
spin_unlock_irq(&nl->lock);
