[U-Boot] [PATCH 1/1] efi_memory: avoid NULL dereference in efi_free_pool

If efi_free_pool is called with argument NULL an illegal memory access occurs.

So let's check the parameter on entry.

Signed-off-by: Heinrich Schuchardt xypron.glpk@gmx.de --- 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 db2ae19f59..5c53aaafdb 100644 --- a/lib/efi_loader/efi_memory.c +++ b/lib/efi_loader/efi_memory.c @@ -379,6 +379,9 @@ efi_status_t efi_free_pool(void *buffer) efi_status_t r; struct efi_pool_allocation *alloc;

+ if (buffer == NULL) + return EFI_INVALID_PARAMETER; + alloc = container_of(buffer, struct efi_pool_allocation, data); /* Sanity check, was the supplied address returned by allocate_pool */ assert(((uintptr_t)alloc & EFI_PAGE_MASK) == 0);