From 39c0b5e4200a84f97338ca1d3c81e5f81af49f70 Mon Sep 17 00:00:00 2001
From: Robert Mustacchi <rm@fingolfin.org>
Date: Fri, 12 Nov 2021 15:19:28 -0800
Subject: [PATCH] 14366 list_is_vga_only() can't handle empty memlists Reviewed
 by: Yuri Pankov <ypankov@tintri.com> Reviewed by: Toomas Soome
 <tsoome@me.com> Approved by: Dan McDonald <danmcd@joyent.com>

---
 usr/src/uts/intel/io/pci/pci_boot.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/usr/src/uts/intel/io/pci/pci_boot.c b/usr/src/uts/intel/io/pci/pci_boot.c
index b51bc849786e..f2cff30ed3d1 100644
--- a/usr/src/uts/intel/io/pci/pci_boot.c
+++ b/usr/src/uts/intel/io/pci/pci_boot.c
@@ -1051,6 +1051,10 @@ is_vga(struct memlist *elem, enum io_mem io)
 static boolean_t
 list_is_vga_only(struct memlist *l, enum io_mem io)
 {
+	if (l == NULL) {
+		return (B_FALSE);
+	}
+
 	do {
 		if (!is_vga(l, io))
 			return (B_FALSE);