[PATCH 2/4] efi_loader: check alignment in efi_add_memory_map()

Michael Walle michael at walle.cc
Thu May 14 14:38:29 CEST 2020

The first argument has to be aligned with EFI_PAGE_SIZE. This alignment
is already checked for external callers but it is not checked for
internal callers. Unfortunately, most of the time the return value is
not checked, so scream loud and clear.

Signed-off-by: Michael Walle <michael at walle.cc>
 lib/efi_loader/efi_memory.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/efi_loader/efi_memory.c b/lib/efi_loader/efi_memory.c
index fd79178da9..b56e19cb30 100644
--- a/lib/efi_loader/efi_memory.c
+++ b/lib/efi_loader/efi_memory.c
@@ -248,6 +248,9 @@ efi_status_t efi_add_memory_map(uint64_t start, uint64_t pages, int memory_type,
 	EFI_PRINT("%s: 0x%llx 0x%llx %d %s\n", __func__,
 		  start, pages, memory_type, overlap_only_ram ? "yes" : "no");
+	if (start & EFI_PAGE_MASK)
+		panic("%s: start not aligned\n", __func__);
 	if (memory_type >= EFI_MAX_MEMORY_TYPE)

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