efivarfs: efivarfs_file_read ensure we free data in error paths
Signed-off-by: Andy Whitcroft <apw@canonical.com>
Acked-by: Matthew Garrett <mjg@redhat.com>
Acked-by: Jeremy Kerr <jeremy.kerr@canonical.com>
Signed-off-by: Matt Fleming <matt.fleming@intel.com>
diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c
index 6793965..b7c9a32 100644
--- a/drivers/firmware/efivars.c
+++ b/drivers/firmware/efivars.c
@@ -766,7 +766,7 @@
unsigned long datasize = 0;
u32 attributes;
void *data;
- ssize_t size;
+ ssize_t size = 0;
status = efivars->ops->get_variable(var->var.VariableName,
&var->var.VendorGuid,
@@ -784,13 +784,13 @@
&var->var.VendorGuid,
&attributes, &datasize,
(data + 4));
-
if (status != EFI_SUCCESS)
- return 0;
+ goto out_free;
memcpy(data, &attributes, 4);
size = simple_read_from_buffer(userbuf, count, ppos,
data, datasize + 4);
+out_free:
kfree(data);
return size;