From e00b82db809725ead77ddfe602c9c8fad1f45ab7 Mon Sep 17 00:00:00 2001 From: Heinrich Schuchardt Date: Thu, 25 Apr 2019 18:41:40 +0200 Subject: [PATCH] efi_loader: FreePages() must fail with pages = 0 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 --- lib/efi_loader/efi_memory.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/lib/efi_loader/efi_memory.c b/lib/efi_loader/efi_memory.c index 987cc6dc5f..776077cc35 100644 --- a/lib/efi_loader/efi_memory.c +++ b/lib/efi_loader/efi_memory.c @@ -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; -- 2.39.5