Check if GetVariable writes past the end of the output data buffer.
Signed-off-by: Ivan Gorinov <[email protected]>
---
lib/efi_selftest/efi_selftest_variables.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)
diff --git a/lib/efi_selftest/efi_selftest_variables.c
b/lib/efi_selftest/efi_selftest_variables.c
index f5e8eb6..8a02dbc 100644
--- a/lib/efi_selftest/efi_selftest_variables.c
+++ b/lib/efi_selftest/efi_selftest_variables.c
@@ -72,6 +72,22 @@ static int execute(void)
efi_st_error("SetVariable failed\n");
return EFI_ST_FAILURE;
}
+ data[3] = 0xff;
+ len = 3;
+ ret = runtime->get_variable(L"efi_st_var0", &guid_vendor0,
+ &attr, &len, data);
+ if (ret != EFI_SUCCESS) {
+ efi_st_error("GetVariable failed\n");
+ return EFI_ST_FAILURE;
+ }
+ if (efi_st_memcmp(data, v + 4, 3)) {
+ efi_st_error("GetVariable returned wrong value\n");
+ return EFI_ST_FAILURE;
+ }
+ if (data[3] != 0xff) {
+ efi_st_error("GetVariable wrote past the end of the buffer\n");
+ return EFI_ST_FAILURE;
+ }
/* Set variable 1 */
ret = runtime->set_variable(L"efi_st_var1", &guid_vendor1,
EFI_VARIABLE_BOOTSERVICE_ACCESS,
--
2.7.4
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