This is a note to let you know that I've just added the patch titled plip: avoid rcu debug splat to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: plip-avoid-rcu-debug-splat.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From bc3c8fe3c79bcdae4d90e3726054fac5cca8ac32 Mon Sep 17 00:00:00 2001 From: Florian Westphal <fw@xxxxxxxxx> Date: Sun, 7 Aug 2022 13:53:04 +0200 Subject: plip: avoid rcu debug splat From: Florian Westphal <fw@xxxxxxxxx> commit bc3c8fe3c79bcdae4d90e3726054fac5cca8ac32 upstream. 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@xxxxxxxxx> Signed-off-by: Florian Westphal <fw@xxxxxxxxx> Link: https://lore.kernel.org/r/20220807115304.13257-1-fw@xxxxxxxxx Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- drivers/net/plip/plip.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/net/plip/plip.c +++ b/drivers/net/plip/plip.c @@ -1107,7 +1107,7 @@ 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) { memcpy(dev->dev_addr+2, &ifa->ifa_local, 4); } Patches currently in stable-queue which might be from fw@xxxxxxxxx are queue-5.15/plip-avoid-rcu-debug-splat.patch