net: neigh: don't call kfree_skb() under spin_lock_irqsave()

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commit d5485d9dd2 upstream.

It is not allowed to call kfree_skb() from hardware interrupt
context or with interrupts being disabled. So add all skb to
a tmp list, then free them after spin_unlock_irqrestore() at
once.

Fixes: 66ba215cb5 ("neigh: fix possible DoS due to net iface start/stop loop")
Suggested-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Yang Yingliang 2022-08-22 10:53:46 +08:00 • committed by Greg Kroah-Hartman

parent ec274d8f1e

commit 123bf15c1a

1 changed files with 8 additions and 2 deletions

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net/core/neighbour.c

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