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nh: fix scope used to find saddr when adding non gw nh

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[ Upstream commit bac0f937c343d651874f83b265ca8f5070ed4f06 ]

As explained by Julian, fib_nh_scope is related to fib_nh_gw4, but
fib_info_update_nhc_saddr() needs the scope of the route, which is
the scope "before" fib_nh_scope, ie fib_nh_scope - 1.

This patch fixes the problem described in commit 747c14307214 ("ip: fix
dflt addr selection for connected nexthop").

Fixes: 597cfe4fc339 ("nexthop: Add support for IPv4 nexthops")
Link: https://lore.kernel.org/netdev/6c8a44ba-c2d5-cdf-c5c7-5baf97cba38@ssi.bg/
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Reviewed-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Nicolas Dichtel 2022-10-20 12:09:52 +02:00 committed by Greg Kroah-Hartman
parent 2ad284ac88
commit b317d53680
1 changed files with 1 additions and 1 deletions
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2
net/ipv4/nexthop.c
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@ -2535,7 +2535,7 @@ static int nh_create_ipv4(struct net *net, struct nexthop *nh,
if (!err) {
nh->nh_flags = fib_nh->fib_nh_flags;
fib_info_update_nhc_saddr(net, &fib_nh->nh_common,
fib_nh->fib_nh_scope);
!fib_nh->fib_nh_scope ? 0 : fib_nh->fib_nh_scope - 1);
} else {
fib_nh_release(net, fib_nh);
}