Log euid, rgid and jail on listen queue overflow

If you have numerous jails with multiple similar services running,
this helps to narrow down which services this log is referring to.

1 files changed, 18 insertions, 6 deletions

diff --git a/sys/kern/uipc_socket.c b/sys/kern/uipc_socket.c
index ab8e5d6e1b69..4c4fde0d6a26 100644
--- a/sys/kern/uipc_socket.c
+++ b/sys/kern/uipc_socket.c
@@ -699,12 +699,24 @@ sonewconn(struct socket *head, int connstatus)
 			}
 			KASSERT(sbuf_len(&descrsb) > 0,
 			    ("%s: sbuf creation failed", __func__));
-			log(LOG_DEBUG,
-			    "%s: pcb %p (%s): Listen queue overflow: "
-			    "%i already in queue awaiting acceptance "
-			    "(%d occurrences)\n",
-			    __func__, head->so_pcb, sbuf_data(&descrsb),
-			    qlen, overcount);
+			if (head->so_cred == 0) {
+				log(LOG_DEBUG,
+			    	"%s: pcb %p (%s): Listen queue overflow: "
+			    	"%i already in queue awaiting acceptance "
+			    	"(%d occurrences)\n",
+			    	__func__, head->so_pcb, sbuf_data(&descrsb),
+			    	qlen, overcount);
+			} else {
+				log(LOG_DEBUG, "%s: pcb %p (%s): Listen queue overflow: "
+				    "%i already in queue awaiting acceptance "
+				    "(%d occurrences), euid %d, rgid %d, jail %s\n",
+				    __func__, head->so_pcb, sbuf_data(&descrsb),
+				    qlen, overcount,
+				    head->so_cred->cr_uid, head->so_cred->cr_rgid,
+				    head->so_cred->cr_prison ?
+					head->so_cred->cr_prison->pr_name :
+					"not_jailed");
+			}
 			sbuf_delete(&descrsb);
 
 			overcount = 0;