llc: avoid blocking in llc_sap_close()
authorCong Wang <xiyou.wangcong@gmail.com>
Tue, 11 Sep 2018 18:42:06 +0000 (11:42 -0700)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Wed, 20 Nov 2019 17:46:35 +0000 (18:46 +0100)
commit9a484516a4105fcc01a21b321d06f5f0b8588242
treea0b708871414a85cc4c81e91efbe46e0fc82eb79
parent50e40ebcaa32e27e62b916886f8ce2822b96778c
llc: avoid blocking in llc_sap_close()

[ Upstream commit 9708d2b5b7c648e8e0a40d11e8cea12f6277f33c ]

llc_sap_close() is called by llc_sap_put() which
could be called in BH context in llc_rcv(). We can't
block in BH.

There is no reason to block it here, kfree_rcu() should
be sufficient.

Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
include/net/llc.h
net/llc/llc_core.c