chelsio/chtls: fix a double free in chtls_setkey()

The "skb" is freed by the transmit code in cxgb4_ofld_send() and we shouldn't use it again. But in the current code, if we hit an error later on in the function then the clean up code will call kfree_skb(skb) and so it causes a double free.

Set the "skb" to NULL and that makes the kfree_skb() a no-op.

---
 drivers/net/ethernet/chelsio/inline_crypto/chtls/chtls_hw.c | 1 +
 1 file changed, 1 insertion(+)

index 62c829023da5..a4fb463af22a 100644
@@ -391,6 +391,7 @@ int chtls_setkey(struct chtls_sock *csk, u32 keylen,
 	csk->wr_unacked += DIV_ROUND_UP(len, 16);
 	enqueue_wr(csk, skb);
 	cxgb4_ofld_send(csk->egress_dev, skb);
+	skb = NULL;
 
 	chtls_set_scmd(csk);
 	/* Clear quiesce for Rx key */

2.29.2

Applied, thanks!