net: Handle l3mdev in ip_tunnel_init_flow

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commit db53cd3d88 upstream.

Ido reported that the commit referenced in the Fixes tag broke
a gre use case with dummy devices. Add a check to ip_tunnel_init_flow
to see if the oif is an l3mdev port and if so set the oif to 0 to
avoid the oif comparison in fib_lookup_good_nhc.

Fixes: 40867d74c3 ("net: Add l3mdev index to flow struct and avoid oif reset for port devices")
Reported-by: Ido Schimmel <idosch@idosch.org>
Signed-off-by: David Ahern <dsahern@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

David Ahern 2022-04-13 11:43:20 -06:00 • committed by Greg Kroah-Hartman

parent 9476ecd7f7

commit 760852df57

4 changed files with 17 additions and 9 deletions

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2

drivers/net/ethernet/mellanox/mlxsw/spectrum_span.c

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11

include/net/ip_tunnels.h

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4

net/ipv4/ip_gre.c

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9

net/ipv4/ip_tunnel.c

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