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[PATCH 1/2] efidisk: null pointer dereference in is_child
From: |
Eric Snowberg |
Subject: |
[PATCH 1/2] efidisk: null pointer dereference in is_child |
Date: |
Thu, 28 Mar 2019 15:26:36 -0600 |
Function grub_efi_find_last_device path may return NULL when called
from is_child.
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 961c155..78ab2d2 100644
--- a/grub-core/disk/efi/efidisk.c
+++ b/grub-core/disk/efi/efidisk.c
@@ -162,6 +162,9 @@ is_child (struct grub_efidisk_data *child,
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