[PATCH] efidisk: write to null pointer ldp

[Eric Snowberg]

Function grub_efi_find_last_device_path may return constant NULL when
called from find_parent_device.

Signed-off-by: Eric Snowberg <address@hidden>
---
 grub-core/disk/efi/efidisk.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/grub-core/disk/efi/efidisk.c b/grub-core/disk/efi/efidisk.c
index 0f132f5..961c155 100644
--- a/grub-core/disk/efi/efidisk.c
+++ b/grub-core/disk/efi/efidisk.c
@@ -129,6 +129,9 @@ find_parent_device (struct grub_efidisk_data *devices,
     return 0;
 
   ldp = grub_efi_find_last_device_path (dp);
+  if (! ldp)
+    return 0;
+
   ldp->type = GRUB_EFI_END_DEVICE_PATH_TYPE;
   ldp->subtype = GRUB_EFI_END_ENTIRE_DEVICE_PATH_SUBTYPE;
   ldp->length = sizeof (*ldp);
-- 
1.8.3.1