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efi_selftest: check length reported by GetNextVariableName()

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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 <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2020-03-20 19:20:17 +01:00
parent 4d7f5af841
commit e1089765b5
1 changed files with 8 additions and 2 deletions
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10
lib/efi_selftest/efi_selftest_variables.c
View file

@ -11,7 +11,7 @@
#include <efi_selftest.h>
#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;