Merge branch 'linus' into x86/xen

1 files changed, 4 insertions, 0 deletions

diff --git a/drivers/acpi/utilities/utalloc.c b/drivers/acpi/utilities/utalloc.c
index 3dfb8a442b26..e7bf34a7b1d2 100644
--- a/drivers/acpi/utilities/utalloc.c
+++ b/drivers/acpi/utilities/utalloc.c
@@ -242,6 +242,10 @@ acpi_ut_initialize_buffer(struct acpi_buffer * buffer,
 {
         acpi_status status = AE_OK;
 
+        if (!required_length) {
+                WARN_ON(1);
+                return AE_ERROR;
+        }
         switch (buffer->length) {
         case ACPI_NO_BUFFER: