iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

nl80211: fix NL80211_ATTR_CHANNEL_WIDTH attribute type

Browse Source 
commit 0016d3201753b59f3ae84b868fe66c86ad256f19 upstream.

The new opmode notification used this attribute with a u8, when
it's documented as a u32 and indeed used in userspace as such,
it just happens to work on little-endian systems since userspace
isn't doing any strict size validation, and the u8 goes into the
lower byte. Fix this.

Cc: stable@vger.kernel.org
Fixes: 466b9936bf93 ("cfg80211: Add support to notify station's opmode change to userspace")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Link: https://lore.kernel.org/r/20200325090531.be124f0a11c7.Iedbf4e197a85471ebd729b186d5365c0343bf7a8@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Johannes Berg 2020-03-25 09:05:32 +01:00 committed by Greg Kroah-Hartman
parent b34e20c78f
commit 4a89bb3fca
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
net/wireless/nl80211.c
View File

@ -16407,7 +16407,7 @@ void cfg80211_sta_opmode_change_notify(struct net_device *dev, const u8 *mac,
goto nla_put_failure;
if ((sta_opmode->changed & STA_OPMODE_MAX_BW_CHANGED) &&
nla_put_u8(msg, NL80211_ATTR_CHANNEL_WIDTH, sta_opmode->bw))
nla_put_u32(msg, NL80211_ATTR_CHANNEL_WIDTH, sta_opmode->bw))
goto nla_put_failure;
if ((sta_opmode->changed & STA_OPMODE_N_SS_CHANGED) &&