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>
illumos · Jan 15, 2022 · 39c0b5e · 39c0b5e
1 parent e0cd43f
commit 39c0b5e
Showing 1 changed file with 4 additions and 0 deletions.
diff --git 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);