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| author | AKASHI Takahiro <takahiro.akashi@linaro.org> | 2019-05-24 15:59:03 +0900 |
|---|---|---|
| committer | Heinrich Schuchardt <xypron.glpk@gmx.de> | 2019-05-24 18:58:14 +0200 |
| commit | a2c6983740104c8e608c411eff6a58e2f4feaede (patch) | |
| tree | ff12577b9032434d29930c5060e2b1079d1904e3 /lib | |
| parent | dbebae5ec77eee029fb36337643e052eecb50453 (diff) | |
| download | u-boot-a2c6983740104c8e608c411eff6a58e2f4feaede.tar.gz u-boot-a2c6983740104c8e608c411eff6a58e2f4feaede.tar.xz u-boot-a2c6983740104c8e608c411eff6a58e2f4feaede.zip | |
efi_loader: variable: attributes may not be changed if a variable exists
If a variable already exists, efi_set_variable() should not change
the variable's attributes. This patch enforces it.
Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/efi_loader/efi_variable.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/lib/efi_loader/efi_variable.c b/lib/efi_loader/efi_variable.c index 0d973773fa..50bc10537f 100644 --- a/lib/efi_loader/efi_variable.c +++ b/lib/efi_loader/efi_variable.c @@ -451,12 +451,21 @@ efi_status_t EFIAPI efi_set_variable(u16 *variable_name, if (val) { parse_attr(val, &attr); + /* We should not free val */ + val = NULL; if (attr & READ_ONLY) { - /* We should not free val */ - val = NULL; 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); |