Our current implementation of GetNextVariableName() first collects all EFI variables. If none is found at all hexport_r() returns a zero length string terminated by \0 and the value 1 as number of bytes in the returned buffer.

In this case GetNextVariableName() has to return EFI_NOT_FOUND.

Signed-off-by: Heinrich Schuchardt xypron.glpk@gmx.de --- lib/efi_loader/efi_variable.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/efi_loader/efi_variable.c b/lib/efi_loader/efi_variable.c index 537006e50a..2a5b202881 100644 --- a/lib/efi_loader/efi_variable.c +++ b/lib/efi_loader/efi_variable.c @@ -356,7 +356,8 @@ efi_status_t EFIAPI efi_get_next_variable_name(efi_uintn_t *variable_name_size, list_len = hexport_r(&env_htab, '\n', H_MATCH_REGEX | H_MATCH_KEY, &efi_variables_list, 0, 1, regexlist); - if (list_len <= 0) + /* 1 indicates that no match was found */ + if (list_len <= 1) return EFI_EXIT(EFI_NOT_FOUND);

variable = efi_variables_list;