From: Ross Lagerwall <ross.lagerwall@xxxxxxxxxx>
[ Upstream commit c57dcb566d3d866a302a1da2e06344bec31d5bcd ]
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
NUL-terminated.
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>
Acked-by: Matthew Garrett <mjg59@xxxxxxxxxx>
Cc: Jeremy Kerr <jk@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Matt Fleming <matt.fleming@xxxxxxxxx>
Signed-off-by: Sasha Levin <sasha.levin@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 0a48886..c2f421c 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;
--
2.1.0
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