grub: fix a memory leak

This patch adds a fix for a memory leak in grub's disk/ldm.
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: 444a690c28fa78147273213f2ae19b1a67027a71)

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>

2 files changed, 29 insertions, 0 deletions

diff --git a/meta/recipes-bsp/grub/files/0017-disk-ldm-If-failed-then-free-vg-variable-too.patch b/meta/recipes-bsp/grub/files/0017-disk-ldm-If-failed-then-free-vg-variable-too.patch
new file mode 100644
index 0000000000..ecdb230f76
--- /dev/null
+++ b/meta/recipes-bsp/grub/files/0017-disk-ldm-If-failed-then-free-vg-variable-too.patch
@@ -0,0 +1,28 @@
+From 253485e8df3c9dedac848567e638157530184295 Mon Sep 17 00:00:00 2001
+From: Paulo Flabiano Smorigo <pfsmorigo@canonical.com>
+Date: Mon, 7 Dec 2020 10:07:47 -0300
+Subject: [PATCH] disk/ldm: If failed then free vg variable too
+
+Fixes: CID 73809
+
+Signed-off-by: Paulo Flabiano Smorigo <pfsmorigo@canonical.com>
+Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
+
+Upstream-Status: Backport [https://git.savannah.gnu.org/cgit/grub.git/commit/?id=e0b83df5da538d2a38f770e60817b3a4b9d5b4d7]
+Signed-off-by: Marta Rybczynska <marta.rybczynska@huawei.com>
+---
+ grub-core/disk/ldm.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/grub-core/disk/ldm.c b/grub-core/disk/ldm.c
+index 428415f..54713f4 100644
+--- a/grub-core/disk/ldm.c
++++ b/grub-core/disk/ldm.c
+@@ -199,6 +199,7 @@ make_vg (grub_disk_t disk,
+     {
+       grub_free (vg->uuid);
+       grub_free (vg->name);
++      grub_free (vg);
+       return NULL;
+     }
+   grub_memcpy (vg->uuid, label->group_guid, LDM_GUID_STRLEN);
diff --git a/meta/recipes-bsp/grub/grub2.inc b/meta/recipes-bsp/grub/grub2.inc
index 479e2f71f2..a8ee0dd68a 100644
--- a/meta/recipes-bsp/grub/grub2.inc
+++ b/meta/recipes-bsp/grub/grub2.inc
@@ -63,6 +63,7 @@ SRC_URI = "${GNU_MIRROR}/grub/grub-${PV}.tar.gz \
            file://0014-zstd-Initialize-seq_t-structure-fully.patch \
            file://0015-kern-partition-Check-for-NULL-before-dereferencing-i.patch \
            file://0016-disk-ldm-Make-sure-comp-data-is-freed-before-exiting.patch \
+           file://0017-disk-ldm-If-failed-then-free-vg-variable-too.patch \
            "
 SRC_URI[md5sum] = "5ce674ca6b2612d8939b9e6abed32934"
 SRC_URI[sha256sum] = "f10c85ae3e204dbaec39ae22fa3c5e99f0665417e91c2cb49b7e5031658ba6ea"