[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
[PATCH 1/1] efi: avoid NULL dereference if FilePath is NULL
From: |
Heinrich Schuchardt |
Subject: |
[PATCH 1/1] efi: avoid NULL dereference if FilePath is NULL |
Date: |
Tue, 16 Apr 2019 20:01:10 +0200 |
The UEFI specification allows LoadImage() to be called with a memory
location only and without a device path. In this case FilePath will not be
set in the EFI_LOADED_IMAGE_PROTOCOL.
So in function grub_efi_get_filename() the device path argument may be
NULL. As we cannot determine the device path in this case just return NULL
from the function.
Signed-off-by: Heinrich Schuchardt <address@hidden>
---
grub-core/kern/efi/efi.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/grub-core/kern/efi/efi.c b/grub-core/kern/efi/efi.c
index 708581fcb..84e68cf31 100644
--- a/grub-core/kern/efi/efi.c
+++ b/grub-core/kern/efi/efi.c
@@ -327,6 +327,9 @@ grub_efi_get_filename (grub_efi_device_path_t *dp0)
grub_size_t filesize = 0;
grub_efi_device_path_t *dp;
+ if (!dp0)
+ return NULL;
+
dp = dp0;
while (1)
--
2.20.1
- [PATCH 1/1] efi: avoid NULL dereference if FilePath is NULL,
Heinrich Schuchardt <=