mirrors/poky
1
0
Fork 0
mirror of https://git.yoctoproject.org/poky synced 2026-04-21 03:32:12 +02:00
Code Issues Packages Projects Releases Wiki Activity

grub: add a fix for a possible NULL dereference

Browse Source 
This patch adds a fix for a possible NULL dereference in grub's
libgcrypt/mpi. It is a part of a security series [1].

[1] https://lists.gnu.org/archive/html/grub-devel/2021-03/msg00007.html

(From OE-Core rev: 33aa1a133cf2893a6d3a1f94bd098ee1c16a8abc)

Signed-off-by: Marta Rybczynska <marta.rybczynska@huawei.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Marta Rybczynska
2022-02-18 11:05:35 +01:00
committed by Richard Purdie
parent e2f193d252
commit b46710743b
2 changed files with 34 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

33
meta/recipes-bsp/grub/files/0027-libgcrypt-mpi-Fix-possible-NULL-dereference.patch Normal file
View File

@@ -0,0 +1,33 @@
From d26c8771293637b0465f2cb67d97cb58bacc62da Mon Sep 17 00:00:00 2001
From: Darren Kenny <darren.kenny@oracle.com>
Date: Thu, 26 Nov 2020 10:41:54 +0000
Subject: [PATCH] libgcrypt/mpi: Fix possible NULL dereference
The code in gcry_mpi_scan() assumes that buffer is not NULL, but there
is no explicit check for that, so we add one.
Fixes: CID 73757
Signed-off-by: Darren Kenny <darren.kenny@oracle.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
Upstream-Status: Backport [https://git.savannah.gnu.org/cgit/grub.git/commit/?id=ae0f3fabeba7b393113d5dc185b6aff9b728136d]
Signed-off-by: Marta Rybczynska <marta.rybczynska@huawei.com>
---
grub-core/lib/libgcrypt/mpi/mpicoder.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/grub-core/lib/libgcrypt/mpi/mpicoder.c b/grub-core/lib/libgcrypt/mpi/mpicoder.c
index 7ecad27..6fe3891 100644
--- a/grub-core/lib/libgcrypt/mpi/mpicoder.c
+++ b/grub-core/lib/libgcrypt/mpi/mpicoder.c
@@ -379,6 +379,9 @@ gcry_mpi_scan (struct gcry_mpi **ret_mpi, enum gcry_mpi_format format,
unsigned int len;
int secure = (buffer && gcry_is_secure (buffer));
+ if (!buffer)
+ return gcry_error (GPG_ERR_INV_ARG);
+
if (format == GCRYMPI_FMT_SSH)
len = 0;
else

1
meta/recipes-bsp/grub/grub2.inc
View File

@@ -73,6 +73,7 @@ SRC_URI = "${GNU_MIRROR}/grub/grub-${PV}.tar.gz \
file://0024-zfsinfo-Correct-a-check-for-error-allocating-memory.patch \
file://0025-affs-Fix-memory-leaks.patch \
file://0026-libgcrypt-mpi-Fix-possible-unintended-sign-extension.patch \
file://0027-libgcrypt-mpi-Fix-possible-NULL-dereference.patch \
"
SRC_URI[md5sum] = "5ce674ca6b2612d8939b9e6abed32934"
SRC_URI[sha256sum] = "f10c85ae3e204dbaec39ae22fa3c5e99f0665417e91c2cb49b7e5031658ba6ea"