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emu: Make grub_free(NULL) safe

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The grub_free() implementation in grub-core/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>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This commit is contained in:
Peter Jones 2020-07-19 16:08:08 -04:00 committed by Daniel Kiper
parent 879c4a8342
commit b73cee7f1f
1 changed files with 2 additions and 1 deletions
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3
grub-core/kern/emu/mm.c
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@ -60,7 +60,8 @@ grub_zalloc (grub_size_t size)
void
grub_free (void *ptr)
{
free (ptr);
if (ptr)
free (ptr);
}
void *