5.4-stable review patch. If anyone has any objections, please let me know.
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From: Justin Iurman justin.iurman@uliege.be
[ 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: 79ff2fc31e0f ("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 --- net/ipv6/ila/ila_lwt.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/ipv6/ila/ila_lwt.c b/net/ipv6/ila/ila_lwt.c index 6a6a30e82810d..dc01cdb043498 100644 --- a/net/ipv6/ila/ila_lwt.c +++ b/net/ipv6/ila/ila_lwt.c @@ -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();