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| author | Johannes Berg <johannes.berg@intel.com> | 2017-04-27 09:13:38 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2017-05-08 11:24:34 +0200 |
| commit | 4954601f821bb5afd4dd59b57bf801adf4924bbd (patch) | |
| tree | 1168c860b5943f8c781feb85487ca7993dd2dfd3 /net/wireless | |
| parent | f8860ce836f2d502b07ef99559707fe55d90f5bc (diff) | |
| download | linux-4954601f821bb5afd4dd59b57bf801adf4924bbd.tar.gz linux-4954601f821bb5afd4dd59b57bf801adf4924bbd.tar.bz2 linux-4954601f821bb5afd4dd59b57bf801adf4924bbd.zip | |
nl80211: correctly validate MU-MIMO groups
Since groups 0 and 63 are invalid, we should check for those bits.
Note that the 802.11 spec specifies the *bit* order, but the CPU
doesn't care about bit order since it can't address bits, so it's
always treating BIT(0) as the lowest bit within a byte.
Reported-by: Jan Fuchs <jan.fuchs@lancom.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/wireless')
| -rw-r--r-- | net/wireless/nl80211.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c index 570fc95dc507..c3bc9da30cff 100644 --- a/net/wireless/nl80211.c +++ b/net/wireless/nl80211.c @@ -2764,8 +2764,8 @@ static int nl80211_parse_mon_options(struct cfg80211_registered_device *rdev, nla_data(info->attrs[NL80211_ATTR_MU_MIMO_GROUP_DATA]); /* bits 0 and 63 are reserved and must be zero */ - if ((mumimo_groups[0] & BIT(7)) || - (mumimo_groups[VHT_MUMIMO_GROUPS_DATA_LEN - 1] & BIT(0))) + if ((mumimo_groups[0] & BIT(0)) || + (mumimo_groups[VHT_MUMIMO_GROUPS_DATA_LEN - 1] & BIT(7))) return -EINVAL; params->vht_mumimo_groups = mumimo_groups; |