*e820ext is always NULL in 'alloc_e820ext()' (see the code of 'exit_boot()').
Without loss of generality we can replace freeing with returning
EFI_INVALID_PARAMETER. So if the caller would ever incorrectly pass non-NULL
*e820ext, he will obtain a returned error code.
---
arch/x86/boot/compressed/eboot.c | 7 ++-----
1 file changed, 2 insertions(+), 5 deletions(-)
diff --git a/arch/x86/boot/compressed/eboot.c b/arch/x86/boot/compressed/eboot.c
index cc69e37..6cc66c7 100644
--- a/arch/x86/boot/compressed/eboot.c
+++ b/arch/x86/boot/compressed/eboot.c
@@ -956,11 +956,8 @@ static efi_status_t alloc_e820ext(u32 nr_desc, struct
setup_data **e820ext,
size = sizeof(struct setup_data) +
sizeof(struct e820entry) * nr_desc;
- if (*e820ext) {
- efi_call_early(free_pool, *e820ext);
- *e820ext = NULL;
- *e820ext_size = 0;
- }
+ if (*e820ext)
+ return EFI_INVALID_PARAMETER;
status = efi_call_early(allocate_pool, EFI_LOADER_DATA,
size, (void **)e820ext);
--
2.10.2
