diff options
| author | Heinrich Schuchardt | 2019-09-23 22:38:53 +0200 |
|---|---|---|
| committer | Heinrich Schuchardt | 2019-09-23 22:53:25 +0200 |
| commit | 3545c6614342e8d91055a0f907ca7441ba00b928 (patch) | |
| tree | 462080bdd8383ae22c6da617f9bdb2c591a6c3a8 /lib/efi_loader | |
| parent | edb6b6842cbddc012d64491701f1d0979ffa96b3 (diff) | |
efi_loader: SetVariable() deleting variables
APPEND_WRITE with data length zero is allowable according to the UEFI
specification.
The EDK2 interpretation of no access attributes is attributes = 0. As
the UEFI specification is vague in this respect let's stick to EDK2 here.
Fixes: commit 6d2f27c5fd60 ("efi_loader: variable: support APPEND_WRITE")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Diffstat (limited to 'lib/efi_loader')
| -rw-r--r-- | lib/efi_loader/efi_variable.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/lib/efi_loader/efi_variable.c b/lib/efi_loader/efi_variable.c index 22ad271bd85..4c554c546b2 100644 --- a/lib/efi_loader/efi_variable.c +++ b/lib/efi_loader/efi_variable.c @@ -443,8 +443,6 @@ efi_status_t EFIAPI efi_set_variable(u16 *variable_name, if (ret) goto out; -#define ACCESS_ATTR (EFI_VARIABLE_RUNTIME_ACCESS | EFI_VARIABLE_BOOTSERVICE_ACCESS) - old_val = env_get(native_name); if (old_val) { old_val = parse_attr(old_val, &attr); @@ -455,7 +453,9 @@ efi_status_t EFIAPI efi_set_variable(u16 *variable_name, goto out; } - if ((data_size == 0) || !(attributes & ACCESS_ATTR)) { + if ((data_size == 0 && + !(attributes & EFI_VARIABLE_APPEND_WRITE)) || + !attributes) { /* delete the variable: */ env_set(native_name, NULL); ret = EFI_SUCCESS; @@ -478,8 +478,9 @@ efi_status_t EFIAPI efi_set_variable(u16 *variable_name, old_size = 0; } } else { - if ((data_size == 0) || !(attributes & ACCESS_ATTR) || - (attributes & EFI_VARIABLE_APPEND_WRITE)) { + if ((data_size == 0 && + !(attributes & EFI_VARIABLE_APPEND_WRITE)) || + !attributes) { /* delete, but nothing to do */ ret = EFI_NOT_FOUND; goto out; |