AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

cfg80211: fully initialize old channel for event

Browse Source 
Paul reported that he got a report about undefined behaviour
that seems to me to originate in using uninitialized memory
when the channel structure here is used in the event code in
nl80211 later.

He never reported whether this fixed it, and I wasn't able
to trigger this so far, but we should do the right thing and
fully initialize the on-stack structure anyway.

Reported-by: Paul Menzel <pmenzel+linux-wireless@molgen.mpg.de>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2018-01-15 09:12:05 +01:00
parent 8155aedf51
commit a48a52b7be
1 changed files with 1 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
net/wireless/reg.c
View File

@ -1769,8 +1769,7 @@ static void handle_reg_beacon(struct wiphy *wiphy, unsigned int chan_idx,
if (wiphy->regulatory_flags & REGULATORY_DISABLE_BEACON_HINTS)
return;
chan_before.center_freq = chan->center_freq;
chan_before.flags = chan->flags;
chan_before = *chan;
if (chan->flags & IEEE80211_CHAN_NO_IR) {
chan->flags &= ~IEEE80211_CHAN_NO_IR;