[PATCH] net: ixgbevf: drop the SA reference if secpath_set() fails

[Wentao Liang <vulab@iscas.ac.cn>]

ixgbevf_ipsec_rx() takes a reference on the xfrm_state returned by
ixgbevf_ipsec_find_rx_state(). On success that reference is handed over
to the skb's security path, which releases it when the skb is freed.
When secpath_set() cannot allocate the extension it returns NULL, but
the function returns without releasing the xfrm_state, so the SA
reference is leaked.

Put the reference before bailing out.

Fixes: 0062e7cc955e ("ixgbevf: add VF IPsec offload code")
Cc: stable@vger.kernel.org
Assisted-by: DeepSeek-V4.1-Flash and OpenAI Codex
Signed-off-by: Wentao Liang <vulab@iscas.ac.cn>
---
 drivers/net/ethernet/intel/ixgbevf/ipsec.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/intel/ixgbevf/ipsec.c b/drivers/net/ethernet/intel/ixgbevf/ipsec.c
index 076fd0a24858..bf3fcab3bd57 100644
--- a/drivers/net/ethernet/intel/ixgbevf/ipsec.c
+++ b/drivers/net/ethernet/intel/ixgbevf/ipsec.c
@@ -596,8 +596,10 @@ void ixgbevf_ipsec_rx(struct ixgbevf_ring *rx_ring,
 		return;
 
 	sp = secpath_set(skb);
-	if (unlikely(!sp))
+	if (unlikely(!sp)) {
+		xfrm_state_put(xs);
 		return;
+	}
 
 	sp->xvec[sp->len++] = xs;
 	sp->olen++;
-- 
2.34.1