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efi_loader: parameter check in GetNextVariableName()

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If GetNextVariableName() is called with a non-existing combination of
VariableName and VendorGuid, return EFI_INVALID_PARAMETER.

If GetNextVariableName() is called with a string that is not zero
terminated, return EFI_INVALID_PARAMETER.

Reformat a line over 80 characters.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
This commit is contained in:
Heinrich Schuchardt 2020-11-19 19:40:08 +01:00
parent 9aeb380277
commit 7e5875a856
1 changed files with 8 additions and 3 deletions
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11
lib/efi_loader/efi_var_mem.c
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@ -304,8 +304,8 @@ efi_get_variable_mem(u16 *variable_name, const efi_guid_t *vendor, u32 *attribut
}
efi_status_t __efi_runtime
efi_get_next_variable_name_mem(efi_uintn_t *variable_name_size, u16 *variable_name,
efi_guid_t *vendor)
efi_get_next_variable_name_mem(efi_uintn_t *variable_name_size,
u16 *variable_name, efi_guid_t *vendor)
{
struct efi_var_entry *var;
efi_uintn_t old_size;
@ -314,7 +314,12 @@ efi_get_next_variable_name_mem(efi_uintn_t *variable_name_size, u16 *variable_na
if (!variable_name_size || !variable_name || !vendor)
return EFI_INVALID_PARAMETER;
efi_var_mem_find(vendor, variable_name, &var);
if (u16_strnlen(variable_name, *variable_name_size) ==
*variable_name_size)
return EFI_INVALID_PARAMETER;
if (!efi_var_mem_find(vendor, variable_name, &var) && *variable_name)
return EFI_INVALID_PARAMETER;
if (!var)
return EFI_NOT_FOUND;