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net: ipv4: provide __rcu annotation for ifa_list

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ifa_list is protected by rcu, yet code doesn't reflect this.

Add the __rcu annotations and fix up all places that are now reported by
sparse.

I've done this in the same commit to not add intermediate patches that
result in new warnings.

Reported-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Florian Westphal 2019-05-31 18:27:09 +02:00 • committed by David S. Miller
parent cb8f1478ce
commit 2638eb8b50
15 changed files with 135 additions and 82 deletions
Download patch file Download diff file Expand all files Collapse all files

12
net/core/netpoll.c
View file

@ -696,16 +696,22 @@ int netpoll_setup(struct netpoll *np)
if (!np->local_ip.ip) {
if (!np->ipv6) {
in_dev = __in_dev_get_rtnl(ndev);
const struct in_ifaddr *ifa;
if (!in_dev || !in_dev->ifa_list) {
in_dev = __in_dev_get_rtnl(ndev);
if (!in_dev)
goto put_noaddr;
ifa = rtnl_dereference(in_dev->ifa_list);
if (!ifa) {
put_noaddr:
np_err(np, "no IP address for %s, aborting\n",
np->dev_name);
err = -EDESTADDRREQ;
goto put;
}
np->local_ip.ip = in_dev->ifa_list->ifa_local;
np->local_ip.ip = ifa->ifa_local;
np_info(np, "local IP %pI4\n", &np->local_ip.ip);
} else {
#if IS_ENABLED(CONFIG_IPV6)