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authorChristophe Ricard <christophe.ricard@gmail.com>2015-08-14 22:33:40 +0200
committerSamuel Ortiz <sameo@linux.intel.com>2015-08-17 01:36:17 +0200
commitfe202fe95564023223ce1910c9e352f391abb1d5 (patch)
tree5ce126dcf515afe51b073be33cc450e360c25410 /net/nfc/netlink.c
parent94b85938ad21944afeff71d1cca68b094905e1b9 (diff)
nfc: netlink: Add check on NFC_ATTR_VENDOR_DATA
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. Cc: stable@vger.kernel.org Signed-off-by: Christophe Ricard <christophe-h.ricard@st.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
Diffstat (limited to 'net/nfc/netlink.c')
-rw-r--r--net/nfc/netlink.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/net/nfc/netlink.c b/net/nfc/netlink.c
index f85f37ed19b2..81dfaaacfc4d 100644
--- a/net/nfc/netlink.c
+++ b/net/nfc/netlink.c
@@ -1518,8 +1518,8 @@ static int nfc_genl_vendor_cmd(struct sk_buff *skb,
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;