ktls: Add missing NULL pointer check for TLS RX hardware offload.

The send tag pointer may be NULL when the ktls_reset_receive_tag()
function is invoked. Add check for this.

Reviewed by:	gallatin @
Sponsored by:	NVIDIA Networking

1 files changed, 3 insertions, 1 deletions

diff --git a/sys/kern/uipc_ktls.c b/sys/kern/uipc_ktls.c
index ff20b3652407..bf91b774c0dc 100644
--- a/sys/kern/uipc_ktls.c
+++ b/sys/kern/uipc_ktls.c
@@ -1631,8 +1631,10 @@ ktls_reset_receive_tag(void *context, int pending)
 	}
 
 	SOCKBUF_LOCK(&so->so_rcv);
-	m_snd_tag_rele(tls->snd_tag);
+	mst = tls->snd_tag;
 	tls->snd_tag = NULL;
+	if (mst != NULL)
+		m_snd_tag_rele(mst);
 
 	ifp = tls->rx_ifp;
 	if_ref(ifp);