6.6-stable review patch. If anyone has any objections, please let me know.
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From: Hangbin Liu liuhangbin@gmail.com
[ Upstream commit a8ba87f04ca9cdec06776ce92dce1395026dc3bb ]
Unlike IPv4, IPv6 routing strictly requires the source address to be valid on the outgoing interface. If the NS target is set to a remote VLAN interface, and the source address is also configured on a VLAN over a bond interface, setting the oif to the bond device will fail to retrieve the correct destination route.
Fix this by not setting the oif to the bond device when retrieving the NS target destination. This allows the correct destination device (the VLAN interface) to be determined, so that bond_verify_device_path can return the proper VLAN tags for sending NS messages.
Reported-by: David Wilder wilder@us.ibm.com Closes: https://lore.kernel.org/netdev/aGOKggdfjv0cApTO@fedora/ Suggested-by: Jay Vosburgh jv@jvosburgh.net Tested-by: David Wilder wilder@us.ibm.com Acked-by: Jay Vosburgh jv@jvosburgh.net Fixes: 4e24be018eb9 ("bonding: add new parameter ns_targets") Signed-off-by: Hangbin Liu liuhangbin@gmail.com Link: https://patch.msgid.link/20250916080127.430626-1-liuhangbin@gmail.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/bonding/bond_main.c | 1 - 1 file changed, 1 deletion(-)
diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c index 291f33c772161..f7ed129fc8110 100644 --- a/drivers/net/bonding/bond_main.c +++ b/drivers/net/bonding/bond_main.c @@ -3261,7 +3261,6 @@ static void bond_ns_send_all(struct bonding *bond, struct slave *slave) /* Find out through which dev should the packet go */ memset(&fl6, 0, sizeof(struct flowi6)); fl6.daddr = targets[i]; - fl6.flowi6_oif = bond->dev->ifindex;
dst = ip6_route_output(dev_net(bond->dev), NULL, &fl6); if (dst->error) {