efi_loader: check parameter in InstallConfigurationTable

Check that parameter guid is not NULL. This avoids a possible NULL
pointer exception.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>

diff --git a/lib/efi_loader/efi_boottime.c b/lib/efi_loader/efi_boottime.c
index 3cee8d607c8278e5c7ff02217c64ebc9cf8bfd5d..9ca2e8161ec657c77acb95f2acb178e1ae6230af 100644 (file)
--- a/lib/efi_loader/efi_boottime.c
+++ b/lib/efi_loader/efi_boottime.c
@@ -1333,6 +1333,9 @@ efi_status_t efi_install_configuration_table(const efi_guid_t *guid, void *table
 {
        int i;
 
+       if (!guid)
+               return EFI_INVALID_PARAMETER;
+
        /* Check for guid override */
        for (i = 0; i < systab.nr_tables; i++) {
                if (!guidcmp(guid, &efi_conf_table[i].guid)) {