grub2/0247-emu-make-grub_free-NULL-safe.patch
Peter Jones 47cf63735c "Minor" bug fixes
Resolves: CVE-2020-10713
Resolves: CVE-2020-14308
Resolves: CVE-2020-14309
Resolves: CVE-2020-14310
Resolves: CVE-2020-14311
Resolves: CVE-2020-15705
Resolves: CVE-2020-15706
Resolves: CVE-2020-15707

Signed-off-by: Peter Jones <pjones@redhat.com>
2020-08-10 22:02:39 -04:00

31 lines
952 B
Diff

From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Sun, 19 Jul 2020 16:08:08 -0400
Subject: [PATCH] emu: make grub_free(NULL) safe
The grub_free() implementation in kern/mm.c safely handles NULL
pointers, and code at many places depends on this. We don't know that
the same is true on all host OSes, so we need to handle the same
behavior in grub-emu's implementation.
Signed-off-by: Peter Jones <pjones@redhat.com>
Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
Upstream-commit-id: 96bb109e658
---
grub-core/kern/emu/mm.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/grub-core/kern/emu/mm.c b/grub-core/kern/emu/mm.c
index 145b01d3719..4d1046a219e 100644
--- a/grub-core/kern/emu/mm.c
+++ b/grub-core/kern/emu/mm.c
@@ -60,7 +60,8 @@ grub_zalloc (grub_size_t size)
void
grub_free (void *ptr)
{
- free (ptr);
+ if (ptr)
+ free (ptr);
}
void *