[PATCH RESEND] efivarfs: Ensure VariableName is NUL-terminated

From: Ross Lagerwall
Date: Thu Apr 02 2015 - 03:39:28 EST

Some buggy firmware implementations update VariableNameSize on success
such that it does not include the final NUL character which results in
garbage in the efivarfs name entries. Use kzalloc on the efivar_entry
(as is done in efivars.c) to ensure that the name is always

The buggy firmware is:
BIOS Information
Vendor: Intel Corp.
Version: S1200RP.86B.02.02.0005.102320140911
Release Date: 10/23/2014
BIOS Revision: 4.6
System Information
Manufacturer: Intel Corporation
Product Name: S1200RP_SE

Signed-off-by: Ross Lagerwall <ross.lagerwall@xxxxxxxxxx>
fs/efivarfs/super.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/efivarfs/super.c b/fs/efivarfs/super.c
index ddbce42..acf9a67 100644
--- a/fs/efivarfs/super.c
+++ b/fs/efivarfs/super.c
@@ -121,7 +121,7 @@ static int efivarfs_callback(efi_char16_t *name16, efi_guid_t vendor,
int len, i;
int err = -ENOMEM;

- entry = kmalloc(sizeof(*entry), GFP_KERNEL);
+ entry = kzalloc(sizeof(*entry), GFP_KERNEL);
if (!entry)
return err;


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