# HG changeset patch
# User rd117015
# Date 1189697420 25200
# Node ID 75097ff1169e858818bd3007914d4ac2271d5c0e
# Parent  c27e9402c8fc4f4f7fbb61d9a198b13a4570c758
6583594 rctl_val_list_delete() is called with NULL root

diff -r c27e9402c8fc -r 75097ff1169e usr/src/uts/common/os/rctl.c
--- a/usr/src/uts/common/os/rctl.c	Thu Sep 13 04:35:54 2007 -0700
+++ b/usr/src/uts/common/os/rctl.c	Thu Sep 13 08:30:20 2007 -0700
@@ -832,7 +832,8 @@
 	prev = *root;
 	if (rctl_val_cmp(rval, prev, 0) == 0) {
 		*root = prev->rcv_next;
-		(*root)->rcv_prev = NULL;
+		if (*root != NULL)
+			(*root)->rcv_prev = NULL;
 
 		kmem_cache_free(rctl_val_cache, prev);