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[5.9,336/757] nl80211: fix OBSS PD min and max offset validation

Message ID 20201027135506.323474631@linuxfoundation.org
State New
Headers show
Series None | expand

Commit Message

Greg KH Oct. 27, 2020, 1:49 p.m. UTC 
From: Rajkumar Manoharan <rmanohar@codeaurora.org>

[ Upstream commit 6c8b6e4a5f745ec49286ac0a3f1d591a34818f82 ]

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: 796e90f42b7e ("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>
---
 net/wireless/nl80211.c | 18 ++++++++----------
 1 file changed, 8 insertions(+), 10 deletions(-)
diff mbox series

Patch

diff --git a/net/wireless/nl80211.c b/net/wireless/nl80211.c
index 7fd45f6ddb058..764151e89d0e9 100644
--- a/net/wireless/nl80211.c
+++ b/net/wireless/nl80211.c
@@ -4683,16 +4683,14 @@  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;
-
-	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 (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]);
+
+	if (he_obss_pd->min_offset > he_obss_pd->max_offset)
 		return -EINVAL;
 
 	he_obss_pd->enable = true;