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nl80211: fix MAC address validation

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MAC addresses have a fixed length. The current
policy allows passing < ETH_ALEN bytes, which
might result in reading beyond the buffer.

Cc: [email protected]
Signed-off-by: Eliad Peller <[email protected]>
Signed-off-by: John W. Linville <[email protected]>
This commit is contained in:
Eliad Peller 2011-11-24 18:13:56 +02:00 • committed by John W. Linville
commit e007b857e8
1 changed files with 2 additions and 2 deletions
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4
net/wireless/nl80211.c
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@ -89,8 +89,8 @@ static const struct nla_policy nl80211_policy[NL80211_ATTR_MAX+1] = {
[NL80211_ATTR_IFINDEX] = { .type = NLA_U32 },
[NL80211_ATTR_IFNAME] = { .type = NLA_NUL_STRING, .len = IFNAMSIZ-1 },
[NL80211_ATTR_MAC] = { .type = NLA_BINARY, .len = ETH_ALEN },
[NL80211_ATTR_PREV_BSSID] = { .type = NLA_BINARY, .len = ETH_ALEN },
[NL80211_ATTR_MAC] = { .len = ETH_ALEN },
[NL80211_ATTR_PREV_BSSID] = { .len = ETH_ALEN },
[NL80211_ATTR_KEY] = { .type = NLA_NESTED, },
[NL80211_ATTR_KEY_DATA] = { .type = NLA_BINARY,