On Tue, May 14, 2019 at 08:08:49PM +0200, Heinrich Schuchardt wrote:
On 5/14/19 8:35 AM, Heinrich Schuchardt wrote:
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.glpk@gmx.de
This patch let's `bootefi selftest`fail:
Executing 'variables' lib/efi_selftest/efi_selftest_variables.c(60): TODO: QueryVariableInfo failed lib/efi_selftest/efi_selftest_variables.c(119): ERROR: SetVariable failed lib/efi_selftest/efi_selftest.c(110): ERROR: Executing 'variables' failed
The preferred solution would be to implement APPEND_WRITE.
Otherwise at least adjust the unit test concerning APPEND_WRITE to use efi_st_todo() and not to abort the test.
Since the current code doesn't supoort APPEND_WRITE, my commit doesn't break anything. You should fix selftest first.
I don't have an immediate plan to implement APPEND_WRITE for now.
-Takahiro Akashi
I suggest that you always run `bootefi selftest` before submitting changes to the UEFI sub-system.
Best regards
Heinrich
Signed-off-by: AKASHI Takahiro takahiro.akashi@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);