This is a note to let you know that I've just added the patch titled
wifi: cfg80211: silence a sparse RCU warning
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
wifi-cfg80211-silence-a-sparse-rcu-warning.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit b053856fc53eb5ae56b11e4ddd2d2ced419005d8
Author: Johannes Berg <johannes.berg@xxxxxxxxx>
Date: Thu Oct 13 19:41:51 2022 +0200
wifi: cfg80211: silence a sparse RCU warning
[ Upstream commit 03c0ad4b06c3566de624b4f4b78ac1a5d1e4c8e7 ]
All we're going to do with this pointer is assign it to
another __rcu pointer, but sparse can't see that, so
use rcu_access_pointer() to silence the warning here.
Fixes: c90b93b5b782 ("wifi: cfg80211: update hidden BSSes to avoid WARN_ON")
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index f0de22a6caf7..2477d28c2dab 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -1676,7 +1676,9 @@ cfg80211_update_known_bss(struct cfg80211_registered_device *rdev,
if (old == rcu_access_pointer(known->pub.ies))
rcu_assign_pointer(known->pub.ies, new->pub.beacon_ies);
- cfg80211_update_hidden_bsses(known, new->pub.beacon_ies, old);
+ cfg80211_update_hidden_bsses(known,
+ rcu_access_pointer(new->pub.beacon_ies),
+ old);
if (old)
kfree_rcu((struct cfg80211_bss_ies *)old, rcu_head);
