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ipv6: take care of scope when choosing the src addr

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commit abb9a68d2c64dd9b128ae1f2e635e4d805e7ce64 upstream.

When the source address is selected, the scope must be checked. For
example, if a loopback address is assigned to the vrf device, it must not
be chosen for packets sent outside.

CC: stable@vger.kernel.org
Fixes: afbac6010aec ("net: ipv6: Address selection needs to consider L3 domains")
Signed-off-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://patch.msgid.link/20240710081521.3809742-4-nicolas.dichtel@6wind.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nicolas Dichtel 2024-07-10 10:14:29 +02:00 committed by Greg Kroah-Hartman
parent a9e9686a84
commit e1523d1372
1 changed files with 2 additions and 1 deletions
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3
net/ipv6/addrconf.c
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@ -1873,7 +1873,8 @@ int ipv6_dev_get_saddr(struct net *net, const struct net_device *dst_dev,
master, &dst,
scores, hiscore_idx);
if (scores[hiscore_idx].ifa)
if (scores[hiscore_idx].ifa &&
scores[hiscore_idx].scopedist >= 0)
goto out;
}