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| author | Srinivas Dasari <dasaris@qti.qualcomm.com> | 2017-07-07 01:43:39 +0300 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2017-10-12 15:27:15 +0100 |
| commit | 15bfaffcc4ca688ea6ad88e500505564195bffa0 (patch) | |
| tree | 6c23a084727b9d4338a56e6023bbf72a7ee64713 | |
| parent | dc66bea5b05e9081b3b5bf1639cc7cd541f0c670 (diff) | |
| download | linux-15bfaffcc4ca688ea6ad88e500505564195bffa0.tar.gz linux-15bfaffcc4ca688ea6ad88e500505564195bffa0.tar.bz2 linux-15bfaffcc4ca688ea6ad88e500505564195bffa0.zip | |
cfg80211: Check if PMKID attribute is of expected size
commit 9361df14d1cbf966409d5d6f48bb334384fbe138 upstream.
nla policy checks for only maximum length of the attribute data
when the attribute type is NLA_BINARY. If userspace sends less
data than specified, the wireless drivers may access illegal
memory. When type is NLA_UNSPEC, nla policy check ensures that
userspace sends minimum specified length number of bytes.
Remove type assignment to NLA_BINARY from nla_policy of
NL80211_ATTR_PMKID to make this NLA_UNSPEC and to make sure minimum
WLAN_PMKID_LEN bytes are received from userspace with
NL80211_ATTR_PMKID.
Fixes: 67fbb16be69d ("nl80211: PMKSA caching support")
Signed-off-by: Srinivas Dasari <dasaris@qti.qualcomm.com>
Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | net/wireless/nl80211.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 446d22439492..b0a8798e8493 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -158,8 +158,7 @@ static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = { [NL80211_ATTR_WPA_VERSIONS] = { .type = NLA_U32 }, [NL80211_ATTR_PID] = { .type = NLA_U32 }, [NL80211_ATTR_4ADDR] = { .type = NLA_U8 }, - [NL80211_ATTR_PMKID] = { .type = NLA_BINARY, - .len = WLAN_PMKID_LEN }, + [NL80211_ATTR_PMKID] = { .len = WLAN_PMKID_LEN }, [NL80211_ATTR_DURATION] = { .type = NLA_U32 }, [NL80211_ATTR_COOKIE] = { .type = NLA_U64 }, [NL80211_ATTR_TX_RATES] = { .type = NLA_NESTED }, |