From: Florian Westphal <fw@strlen.de>
To: netdev@vger.kernel.org
Cc: edumazet@google.com, kuba@kernel.org, pabeni@redhat.com,
davem@davemloft.net, Florian Westphal <fw@strlen.de>,
kernel test robot <oliver.sang@intel.com>
Subject: [PATCH net] plip: avoid rcu debug splat
Date: Sun, 7 Aug 2022 13:53:04 +0200 [thread overview]
Message-ID: <20220807115304.13257-1-fw@strlen.de> (raw)
WARNING: suspicious RCU usage
5.2.0-rc2-00605-g2638eb8b50cfc #1 Not tainted
drivers/net/plip/plip.c:1110 suspicious rcu_dereference_check() usage!
plip_open is called with RTNL held, switch to the correct helper.
Fixes: 2638eb8b50cf ("net: ipv4: provide __rcu annotation for ifa_list")
Reported-by: kernel test robot <oliver.sang@intel.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
---
drivers/net/plip/plip.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/plip/plip.c b/drivers/net/plip/plip.c
index dafd3e9ebbf8..c8791e9b451d 100644
--- a/drivers/net/plip/plip.c
+++ b/drivers/net/plip/plip.c
@@ -1111,7 +1111,7 @@ plip_open(struct net_device *dev)
/* Any address will do - we take the first. We already
have the first two bytes filled with 0xfc, from
plip_init_dev(). */
- const struct in_ifaddr *ifa = rcu_dereference(in_dev->ifa_list);
+ const struct in_ifaddr *ifa = rtnl_dereference(in_dev->ifa_list);
if (ifa != NULL) {
dev_addr_mod(dev, 2, &ifa->ifa_local, 4);
}
--
2.37.1
next reply other threads:[~2022-08-07 11:54 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-07 11:53 Florian Westphal [this message]
2022-08-09 19:30 ` [PATCH net] plip: avoid rcu debug splat patchwork-bot+netdevbpf
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