Index: uipc_socket2.c
===================================================================
RCS file: /home/ncvs/src/sys/kern/uipc_socket2.c,v
retrieving revision 1.137.2.5
diff -u -r1.137.2.5 uipc_socket2.c
--- uipc_socket2.c	23 Feb 2005 00:39:17 -0000	1.137.2.5
+++ uipc_socket2.c	28 Feb 2005 22:39:02 -0000
@@ -1129,6 +1129,7 @@
 	SOCKBUF_UNLOCK(sb);
 }
 
+#define	BIGNUM	10240
 /*
  * Drop data from (the front of) a sockbuf.
  */
@@ -1139,11 +1140,17 @@
 {
 	register struct mbuf *m;
 	struct mbuf *next;
+	int counter;
+
+	counter = 0;
 
 	SOCKBUF_LOCK_ASSERT(sb);
 
 	next = (m = sb->sb_mb) ? m->m_nextpkt : 0;
 	while (len > 0) {
+		counter++;
+		if (counter > BIGNUM)
+			panic("sbdrop_locked: counter 1");
 		if (m == 0) {
 			if (next == 0)
 				panic("sbdrop");
@@ -1165,6 +1172,9 @@
 		m = m_free(m);
 	}
 	while (m && m->m_len == 0) {
+		counter++;
+		if (counter > BIGNUM)
+			panic("sbdrop_locked: counter 1");
 		sbfree(sb, m);
 		m = m_free(m);
 	}