From e1089765b5964f35a426f3abe29ba164422f4165 Mon Sep 17 00:00:00 2001 From: Heinrich Schuchardt Date: Fri, 20 Mar 2020 19:20:17 +0100 Subject: [PATCH] efi_selftest: check length reported by GetNextVariableName() GetNextVariableName should report the length of the variable including the final 0x0000 in bytes. Check this in the unit test. Increase the buffer size for variable names. 40 bytes is too short. Signed-off-by: Heinrich Schuchardt --- lib/efi_selftest/efi_selftest_variables.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/lib/efi_selftest/efi_selftest_variables.c b/lib/efi_selftest/efi_selftest_variables.c index 5d98c029b8..2c16f3db6c 100644 --- a/lib/efi_selftest/efi_selftest_variables.c +++ b/lib/efi_selftest/efi_selftest_variables.c @@ -11,7 +11,7 @@ #include #define EFI_ST_MAX_DATA_SIZE 16 -#define EFI_ST_MAX_VARNAME_SIZE 40 +#define EFI_ST_MAX_VARNAME_SIZE 80 static struct efi_boot_services *boottime; static struct efi_runtime_services *runtime; @@ -155,8 +155,14 @@ static int execute(void) return EFI_ST_FAILURE; } if (!memcmp(&guid, &guid_vendor0, sizeof(efi_guid_t)) && - !efi_st_strcmp_16_8(varname, "efi_st_var0")) + !efi_st_strcmp_16_8(varname, "efi_st_var0")) { flag |= 1; + if (len != 24) { + efi_st_error("GetNextVariableName report wrong length %u, expected 24\n", + (unsigned int)len); + return EFI_ST_FAILURE; + } + } if (!memcmp(&guid, &guid_vendor1, sizeof(efi_guid_t)) && !efi_st_strcmp_16_8(varname, "efi_st_var1")) flag |= 2; -- 2.25.1