From: Florian Westphal Date: Sun, 7 Aug 2022 11:53:04 +0000 (+0200) Subject: plip: avoid rcu debug splat X-Git-Tag: v6.1-rc5~618^2~30 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=bc3c8fe3c79bcdae4d90e3726054fac5cca8ac32;p=platform%2Fkernel%2Flinux-starfive.git plip: avoid rcu debug splat 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 Signed-off-by: Florian Westphal Link: https://lore.kernel.org/r/20220807115304.13257-1-fw@strlen.de Signed-off-by: Jakub Kicinski --- diff --git a/drivers/net/plip/plip.c b/drivers/net/plip/plip.c index dafd3e9..c8791e9 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); }