dany/u-boot-megous
1
0
Fork 0
mirror of https://xff.cz/git/u-boot/ synced 2025-11-01 10:56:02 +01:00
Code Issues Packages Projects Releases Wiki Activity

efi_loader: avoid out of bound access in efi_get_variable()

Browse Source 
In efi_get_variable() a string is longer than the allocated space which
results in overwriting the linked list of malloc().

The prefixes used for variables are 41 characters long, e.g.
efi_67029eb5-0af2-f6b1-da53-fcb566dd1ce6_

Change PREFIX_LEN to 41.

Fixes: faff21556748 ("efi_loader: remove limit on variable length")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Heinrich Schuchardt
2018-09-23 04:08:09 +02:00
committed by Alexander Graf
parent 60ce592cd0
commit 506dc52d5d
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
lib/efi_loader/efi_variable.c
View File

@@ -44,7 +44,7 @@
* converted to utf16?
*/
#define PREFIX_LEN (strlen("efi_xxxxxxxx-xxxx-xxxx-xxxxxxxxxxxxxxxx_"))
#define PREFIX_LEN (strlen("efi_xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx_"))
static int hex(int ch)
{