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trivial: Prevent critical warning when the EFI variable has no data

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I don't think this can happen in reality, but I hit it when mocking up
an efivar directory using FWUPD_SYSFSFWDIR with a 4 byte file.
This commit is contained in:
Richard Hughes 2021-06-28 12:18:08 +01:00
parent 35e701556f
commit c3b973a91e
1 changed files with 7 additions and 0 deletions
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7
libfwupdplugin/fu-efivar-linux.c
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@ -250,6 +250,13 @@ fu_efivar_get_data_impl (const gchar *guid, const gchar *name, guint8 **data,
/* read out the data */ /* read out the data */
data_sz_tmp = sz - sizeof(attr_tmp); data_sz_tmp = sz - sizeof(attr_tmp);
if (data_sz_tmp == 0) {
g_set_error_literal (error,
G_IO_ERROR,
G_IO_ERROR_INVALID_DATA,
"no data to read");
return FALSE;
}
if (data_sz != NULL) if (data_sz != NULL)
*data_sz = data_sz_tmp; *data_sz = data_sz_tmp;
if (data != NULL) { if (data != NULL) {