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efi_loader: FreePages() must fail with pages = 0

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The UEFI spec requires that freeing of pages fails if the number of pages
to be freed is 'invalid'. Check that it is not zero.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2019-04-25 18:41:40 +02:00
parent 751e928d07
commit e00b82db80
1 changed files with 1 additions and 1 deletions
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2
lib/efi_loader/efi_memory.c
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@ -452,7 +452,7 @@ efi_status_t efi_free_pages(uint64_t memory, efi_uintn_t pages)
uint64_t r = 0;
/* Sanity check */
if (!memory || (memory & EFI_PAGE_MASK)) {
if (!memory || (memory & EFI_PAGE_MASK) || !pages) {
printf("%s: illegal free 0x%llx, 0x%zx\n", __func__,
memory, pages);
return EFI_INVALID_PARAMETER;