From 70274af7103c27565c2c24ae92e0a3409a924190 Mon Sep 17 00:00:00 2001 From: Jason Xing Date: Thu, 23 May 2024 03:55:15 +0000 Subject: [PATCH] netrom: Fix a data-race around sysctl_netrom_transport_timeout stable inclusion from stable-v4.19.310 commit 500936692ccca8617a955652d1929f079b17a201 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/I9Q95M CVE: CVE-2024-27427 Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=500936692ccca8617a955652d1929f079b17a201 -------------------------------- [ Upstream commit 60a7a152abd494ed4f69098cf0f322e6bb140612 ] We need to protect the reader reading the sysctl value because the value can be changed concurrently. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Jason Xing Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin Signed-off-by: Hui Tang --- net/netrom/af_netrom.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c index 8f18fea17cfc..82daed1296f5 100644 --- a/net/netrom/af_netrom.c +++ b/net/netrom/af_netrom.c @@ -456,7 +456,7 @@ static int nr_create(struct net *net, struct socket *sock, int protocol, nr_init_timers(sk); nr->t1 = - msecs_to_jiffies(sysctl_netrom_transport_timeout); + msecs_to_jiffies(READ_ONCE(sysctl_netrom_transport_timeout)); nr->t2 = msecs_to_jiffies(sysctl_netrom_transport_acknowledge_delay); nr->n2 = -- Gitee