On 5/14/19 6:57 AM, AKASHI Takahiro wrote:
If a variable already exists, efi_set_variable() should not change
the variable's attributes. This patch enforces it.
This behavior is mandated by UEFI spec 2.7.
Reviewed-by: Heinrich Schuchardt <xypron.g...@gmx.de>
Signed-off-by: AKASHI Takahiro <takahiro.aka...@linaro.org>
---
lib/efi_loader/efi_variable.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/lib/efi_loader/efi_variable.c b/lib/efi_loader/efi_variable.c
index 37728c3c165d..c4f3a5d2743d 100644
--- a/lib/efi_loader/efi_variable.c
+++ b/lib/efi_loader/efi_variable.c
@@ -450,6 +450,15 @@ efi_status_t EFIAPI efi_set_variable(u16 *variable_name,
ret = EFI_WRITE_PROTECTED;
goto out;
}
+
+ /*
+ * attributes won't be changed
+ * TODO: take care of APPEND_WRITE once supported
+ */
+ if (attr != attributes) {
+ ret = EFI_INVALID_PARAMETER;
+ goto out;
+ }
}
val = malloc(2 * data_size + strlen("{ro,run,boot}(blob)") + 1);
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