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nl80211: fix OBSS PD min and max offset validation 

BugLink: https://bugs.launchpad.net/bugs/1902115

[ Upstream commit 6c8b6e4a5f ]

The SRG min and max offset won't present when SRG Information Present of
SR control field of Spatial Reuse Parameter Set element set to 0. Per
spec. IEEE802.11ax D7.0, SRG OBSS PD Min Offset ≤ SRG OBSS PD Max
Offset. Hence fix the constrain check to allow same values in both
offset and also call appropriate nla_get function to read the values.

Fixes: 796e90f42b ("cfg80211: add support for parsing OBBS_PD attributes")
Signed-off-by: Rajkumar Manoharan <rmanohar@codeaurora.org>
Link: https://lore.kernel.org/r/1601278091-20313-1-git-send-email-rmanohar@codeaurora.org
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Ian May <ian.may@canonical.com>
This commit is contained in:
Rajkumar Manoharan 2020-09-28 00:28:10 -07:00 committed by Stefan Bader
parent bfc6d39668
commit 40bdc80437
1 changed files with 7 additions and 9 deletions
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16
net/wireless/nl80211.c
View File

@ -4496,16 +4496,14 @@ static int nl80211_parse_he_obss_pd(struct nlattr *attrs,
if (err)
return err;
if (!tb[NL80211_HE_OBSS_PD_ATTR_MIN_OFFSET] ||
!tb[NL80211_HE_OBSS_PD_ATTR_MAX_OFFSET])
return -EINVAL;
if (tb[NL80211_HE_OBSS_PD_ATTR_MIN_OFFSET])
he_obss_pd->min_offset =
nla_get_u8(tb[NL80211_HE_OBSS_PD_ATTR_MIN_OFFSET]);
if (tb[NL80211_HE_OBSS_PD_ATTR_MAX_OFFSET])
he_obss_pd->max_offset =
nla_get_u8(tb[NL80211_HE_OBSS_PD_ATTR_MAX_OFFSET]);
he_obss_pd->min_offset =
nla_get_u32(tb[NL80211_HE_OBSS_PD_ATTR_MIN_OFFSET]);
he_obss_pd->max_offset =
nla_get_u32(tb[NL80211_HE_OBSS_PD_ATTR_MAX_OFFSET]);
if (he_obss_pd->min_offset >= he_obss_pd->max_offset)
if (he_obss_pd->min_offset > he_obss_pd->max_offset)
return -EINVAL;
he_obss_pd->enable = true;