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| author | Andrea Mayer <andrea.mayer@uniroma2.it> | 2026-04-18 18:28:38 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-04-22 20:32:38 -0700 |
| commit | ade67d5f588832c7ba131aadd4215a94ce0a15c8 (patch) | |
| tree | 2249c3ccafc010a4ab35da31ea36c68e39ad26d6 | |
| parent | 7c9b012d6367a335f1e91da28401a7c612305a46 (diff) | |
| download | linux-next-ade67d5f588832c7ba131aadd4215a94ce0a15c8.tar.gz linux-next-ade67d5f588832c7ba131aadd4215a94ce0a15c8.zip | |
seg6: fix seg6 lwtunnel output redirect for L2 reduced encap mode
When SEG6_IPTUN_MODE_L2ENCAP_RED (L2ENCAP_RED) was introduced, the
condition in seg6_build_state() that excludes L2 encap modes from
setting LWTUNNEL_STATE_OUTPUT_REDIRECT was not updated to account for
the new mode.
As a consequence, L2ENCAP_RED routes incorrectly trigger seg6_output()
on the output path, where the packet is silently dropped because
skb_mac_header_was_set() fails on L3 packets.
Extend the check to also exclude L2ENCAP_RED, consistent with L2ENCAP.
Fixes: 13f0296be8ec ("seg6: add support for SRv6 H.L2Encaps.Red behavior")
Cc: stable@vger.kernel.org
Signed-off-by: Andrea Mayer <andrea.mayer@uniroma2.it>
Reviewed-by: Justin Iurman <justin.iurman@gmail.com>
Link: https://patch.msgid.link/20260418162838.31979-1-andrea.mayer@uniroma2.it
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
| -rw-r--r-- | net/ipv6/seg6_iptunnel.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/net/ipv6/seg6_iptunnel.c b/net/ipv6/seg6_iptunnel.c index 97b50d9b1365..9b64343ebad6 100644 --- a/net/ipv6/seg6_iptunnel.c +++ b/net/ipv6/seg6_iptunnel.c @@ -746,7 +746,8 @@ static int seg6_build_state(struct net *net, struct nlattr *nla, newts->type = LWTUNNEL_ENCAP_SEG6; newts->flags |= LWTUNNEL_STATE_INPUT_REDIRECT; - if (tuninfo->mode != SEG6_IPTUN_MODE_L2ENCAP) + if (tuninfo->mode != SEG6_IPTUN_MODE_L2ENCAP && + tuninfo->mode != SEG6_IPTUN_MODE_L2ENCAP_RED) newts->flags |= LWTUNNEL_STATE_OUTPUT_REDIRECT; newts->headroom = seg6_lwt_headroom(tuninfo); |