4.2-stable review patch. If anyone has any objections, please let me know.
------------------
From: Christophe Ricard <christophe.ricard@xxxxxxxxx>
commit fe202fe95564023223ce1910c9e352f391abb1d5 upstream.
NFC_ATTR_VENDOR_DATA is an optional vendor_cmd argument.
The current code was potentially using a non existing argument
leading to potential catastrophic results.
Signed-off-by: Christophe Ricard <christophe-h.ricard@xxxxxx>
Signed-off-by: Samuel Ortiz <sameo@xxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/nfc/netlink.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -1518,8 +1518,8 @@ static int nfc_genl_vendor_cmd(struct sk
if (!dev || !dev->vendor_cmds || !dev->n_vendor_cmds)
return -ENODEV;
- data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]);
- if (data) {
+ if (info->attrs[NFC_ATTR_VENDOR_DATA]) {
+ data = nla_data(info->attrs[NFC_ATTR_VENDOR_DATA]);
data_len = nla_len(info->attrs[NFC_ATTR_VENDOR_DATA]);
if (data_len == 0)
return -EINVAL;
--
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