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ndisc: ndisc_send_redirect() must use dev_get_by_index_rcu()

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[ Upstream commit 48145a57d4bbe3496e8e4880b23ea6b511e6e519 ]

ndisc_send_redirect() is called under RCU protection, not RTNL.

It must use dev_get_by_index_rcu() instead of __dev_get_by_index()

Fixes: 2f17becfbe ("vrf: check the original netdevice for generating redirect")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Stephen Suryaputra <ssuryaextr@gmail.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Reviewed-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Link: https://patch.msgid.link/20250207135841.1948589-2-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Eric Dumazet 2025-02-07 13:58:33 +00:00 • committed by Greg Kroah-Hartman
commit a4b3863fe7
1 changed files with 1 additions and 1 deletions
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2
net/ipv6/ndisc.c
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@ -1597,7 +1597,7 @@ void ndisc_send_redirect(struct sk_buff *skb, const struct in6_addr *target)
bool ret;
if (netif_is_l3_master(skb->dev)) {
dev = __dev_get_by_index(dev_net(skb->dev), IPCB(skb)->iif);
dev = dev_get_by_index_rcu(dev_net(skb->dev), IPCB(skb)->iif);
if (!dev)
return;
}