From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001

From: Alexey Makhalov <amakhalov@vmware.com>

Date: Wed, 8 Jul 2020 21:30:43 +0000

Subject: [PATCH] xnu: Fix double free in grub_xnu_devprop_add_property()

grub_xnu_devprop_add_property() should not free utf8 and utf16 as it get

allocated and freed in the caller.

Minor improvement: do prop fields initialization after memory allocations.

Fixes: CID 292442, CID 292457, CID 292460, CID 292466

Signed-off-by: Alexey Makhalov <amakhalov@vmware.com>

Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>

Upstream-commit-id: 4d5e2d13519

---

 grub-core/loader/i386/xnu.c | 19 +++++++++----------

 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/grub-core/loader/i386/xnu.c b/grub-core/loader/i386/xnu.c

index ee0eaadc4..c760db30f 100644

--- a/grub-core/loader/i386/xnu.c

+++ b/grub-core/loader/i386/xnu.c

@@ -262,20 +262,19 @@ grub_xnu_devprop_add_property (struct grub_xnu_devprop_device_descriptor *dev,

   if (!prop)

     return grub_errno;

+  prop->data = grub_malloc (datalen);

+  if (!prop->data)

+    {

+      grub_free (prop);

+      return grub_errno;

+    }

+  grub_memcpy (prop->data, data, datalen);

+

   prop->name = utf8;

   prop->name16 = utf16;

   prop->name16len = utf16len;

-

   prop->length = datalen;

-  prop->data = grub_malloc (prop->length);

-  if (!prop->data)

-    {

-      grub_free (prop->name);

-      grub_free (prop->name16);

-      grub_free (prop);

-      return grub_errno;

-    }

-  grub_memcpy (prop->data, data, prop->length);

+

   grub_list_push (GRUB_AS_LIST_P (&dev->properties),

 		  GRUB_AS_LIST (prop));

   return GRUB_ERR_NONE;