ipvlan: Ignore PACKET_LOOPBACK in handle_mode_l2()

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[ Upstream commit 0c57ff008a ]

Packets with pkt_type == PACKET_LOOPBACK are captured by
handle_frame() function, but they don't have L2 header.
We should not process them in handle_mode_l2().

This doesn't affect old L2 functionality, since handling
was anyway incorrect.

Handle them the same way as in br_handle_frame():
just pass the skb.

To observe invalid behaviour, just start "ping -b" on bcast address
of port-interface.

Fixes: 2ad7bf3638 ("ipvlan: Initial check-in of the IPVLAN driver.")
Signed-off-by: Dmitry Skorodumov <skorodumov.dmitry@huawei.com>
Link: https://patch.msgid.link/20251202103906.4087675-1-skorodumov.dmitry@huawei.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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Dmitry Skorodumov 2025-12-02 13:39:03 +03:00 • committed by Greg Kroah-Hartman

parent c7f6e7cc14

commit 194cd36ec0

1 changed files with 3 additions and 0 deletions

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drivers/net/ipvlan/ipvlan_core.c

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