[PATCH 1/5] efivarfs: efivarfs_file_read ensure we free data in error paths

Andy Whitcroft
2012-10-11T10:32:38Z

Signed-off-by: Andy Whitcroft <apw@canonical.com>
---
drivers/firmware/efivars.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/firmware/efivars.c b/drivers/firmware/efivars.c
index 4b12a8fd..ae50d2f 100644
--- a/drivers/firmware/efivars.c
+++ b/drivers/firmware/efivars.c
@@ -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;
--
1.7.9.5