Commit 0d5033d9 authored by Jason Xing's avatar Jason Xing Committed by Ma Wupeng
Browse files

netrom: Fix a data-race around sysctl_netrom_transport_requested_window_size 

stable inclusion
from stable-v6.6.22
commit db006d7edbf0b4800390ece3727a82f4ae764043
bugzilla: https://gitee.com/openeuler/kernel/issues/I99TJK

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=db006d7edbf0b4800390ece3727a82f4ae764043



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[ Upstream commit a2e706841488f474c06e9b33f71afc947fb3bf56 ]

We need to protect the reader reading the sysctl value because the
value can be changed concurrently.

Fixes: 1da177e4 ("Linux-2.6.12-rc2")
Signed-off-by: default avatarJason Xing <kernelxing@tencent.com>
Signed-off-by: default avatarPaolo Abeni <pabeni@redhat.com>
Signed-off-by: default avatarSasha Levin <sashal@kernel.org>
Signed-off-by: default avatarZhangPeng <zhangpeng362@huawei.com>
parent 05cfe720

net/netrom/af_netrom.c

+1 −1
Original line number Diff line number Diff line
@@ -462,7 +462,7 @@ static int nr_create(struct net *net, struct socket *sock, int protocol, 
		msecs_to_jiffies(READ_ONCE(sysctl_netrom_transport_busy_delay));

	nr->idle   =

		msecs_to_jiffies(sysctl_netrom_transport_no_activity_timeout);

	nr->window = sysctl_netrom_transport_requested_window_size;

	nr->window = READ_ONCE(sysctl_netrom_transport_requested_window_size);



	nr->bpqext = 1;

	nr->state  = NR_STATE_0;