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net: ipv6: fix dst ref loop in ila lwtunnel

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[ Upstream commit 0e7633d7b95b67f1758aea19f8e85621c5f506a3 ]

This patch follows commit 92191dd10730 ("net: ipv6: fix dst ref loops in
rpl, seg6 and ioam6 lwtunnels") and, on a second thought, the same patch
is also needed for ila (even though the config that triggered the issue
was pathological, but still, we don't want that to happen).

Fixes: 79ff2fc31e ("ila: Cache a route to translated address")
Cc: Tom Herbert <tom@herbertland.com>
Signed-off-by: Justin Iurman <justin.iurman@uliege.be>
Link: https://patch.msgid.link/20250304181039.35951-1-justin.iurman@uliege.be
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Justin Iurman
2025-03-04 19:10:39 +01:00
committed by Greg Kroah-Hartman
parent 88afbcb450
commit 925933d2cc
1 changed files with 2 additions and 1 deletions
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3
net/ipv6/ila/ila_lwt.c
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@@ -88,7 +88,8 @@ static int ila_output(struct net *net, struct sock *sk, struct sk_buff *skb)
goto drop;
}
if (ilwt->connected) {
/* cache only if we don't create a dst reference loop */
if (ilwt->connected && orig_dst->lwtstate != dst->lwtstate) {
local_bh_disable();
dst_cache_set_ip6(&ilwt->dst_cache, dst, &fl6.saddr);
local_bh_enable();