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efivarfs: efivarfs_file_read ensure we free data in error paths

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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>
This commit is contained in:
Andy Whitcroft 2012-10-11 11:32:17 +01:00 committed by Matt Fleming
parent bd52276fa1
commit d142df03a7
1 changed files with 3 additions and 3 deletions
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6
drivers/firmware/efivars.c
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@ -766,7 +766,7 @@ static ssize_t efivarfs_file_read(struct file *file, char __user *userbuf,
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 @@ static ssize_t efivarfs_file_read(struct file *file, char __user *userbuf,
&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;