diff options
| author | Johannes Berg <johannes.berg@intel.com> | 2022-06-17 22:36:37 +0200 |
|---|---|---|
| committer | Johannes Berg <johannes.berg@intel.com> | 2022-07-15 11:43:14 +0200 |
| commit | d8675a63518c6148827838058feb7f18403faed1 (patch) | |
| tree | fbdee52aa9f31da2b33ad5804cc4ea76a9a82a24 /net/mac80211/rx.c | |
| parent | 3d1cc7cdf2e848181398837fe158bf0850d29ee6 (diff) | |
wifi: mac80211: RCU-ify link/link_conf pointers
Since links can be added and removed dynamically, we need to
somehow protect the sdata->link[] and vif->link_conf[] array
pointers from disappearing when accessing them without locks.
RCU-ify the pointers to achieve this, which requires quite a
bit of rework.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net/mac80211/rx.c')
| -rw-r--r-- | net/mac80211/rx.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index b7dff3ef9748..c70156e49d0d 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -4156,9 +4156,13 @@ static bool ieee80211_is_our_addr(struct ieee80211_sub_if_data *sdata, return false; for (link_id = 0; link_id < ARRAY_SIZE(sdata->vif.link_conf); link_id++) { - if (!sdata->vif.link_conf[link_id]) + struct ieee80211_bss_conf *conf; + + conf = rcu_dereference(sdata->vif.link_conf[link_id]); + + if (!conf) continue; - if (ether_addr_equal(sdata->vif.link_conf[link_id]->addr, addr)) { + if (ether_addr_equal(conf->addr, addr)) { if (out_link_id) *out_link_id = link_id; return true; |