acpi: check for pxm_to_node_map overflow

It is hardly (if ever) possible but in case of broken _PXM entry we could reach out of pxm_to_node_map array bounds in acpi_map_pxm_to_node() call. Signed-off-by: Cyrill Gorcunov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Len Brown <[email protected]>
teemow · Mar 16, 2009 · 27ce341 · 27ce341
1 parent 176f9c1
commit 27ce341
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c
@@ -277,7 +277,7 @@ int acpi_get_node(acpi_handle *handle)
 	int pxm, node = -1;
 
 	pxm = acpi_get_pxm(handle);
-	if (pxm >= 0)
+	if (pxm >= 0 && pxm < MAX_PXM_DOMAINS)
 		node = acpi_map_pxm_to_node(pxm);
 
 	return node;