6.12-stable review patch. If anyone has any objections, please let me know.

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From: Jianbo Liu jianbol@nvidia.com

[ Upstream commit 59630e2ccd728703cc826e3a3515d70f8c7a766c ]

Add a check to ensure locally generated packets (skb->sk != NULL) do not use direct output in tunnel mode, as these packets require proper L2 header setup that is handled by the normal XFRM processing path.

Fixes: 5eddd76ec2fd ("xfrm: fix tunnel mode TX datapath in packet offload mode") Signed-off-by: Jianbo Liu jianbol@nvidia.com Reviewed-by: Leon Romanovsky leonro@nvidia.com Signed-off-by: Steffen Klassert steffen.klassert@secunet.com Signed-off-by: Sasha Levin sashal@kernel.org --- net/xfrm/xfrm_output.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c index a30538a980cc7..9277dd4ed541a 100644 --- a/net/xfrm/xfrm_output.c +++ b/net/xfrm/xfrm_output.c @@ -766,8 +766,12 @@ int xfrm_output(struct sock *sk, struct sk_buff *skb) /* Exclusive direct xmit for tunnel mode, as * some filtering or matching rules may apply * in transport mode. + * Locally generated packets also require + * the normal XFRM path for L2 header setup, + * as the hardware needs the L2 header to match + * for encryption, so skip direct output as well. */ - if (x->props.mode == XFRM_MODE_TUNNEL) + if (x->props.mode == XFRM_MODE_TUNNEL && !skb->sk) return xfrm_dev_direct_output(sk, x, skb);

return xfrm_output_resume(sk, skb, 0);