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From: Edward Adam Davis <eadavis@qq.com>
To: syzbot+864a269c27ee06b58374@syzkaller.appspotmail.com
Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [wireless?] WARNING: suspicious RCU usage in __cfg80211_bss_update
Date: Wed,  3 Jan 2024 19:33:46 +0800	[thread overview]
Message-ID: <tencent_F3421B852547BA53BB2433EE9E461BBF4B08@qq.com> (raw)
In-Reply-To: <0000000000009fa770060e089409@google.com>

please test WARNING: suspicious RCU usage in __cfg80211_bss_update

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git 954fb2d2d49f

diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index cf2131671eb6..7cb8ae87c369 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -1864,7 +1864,7 @@ __cfg80211_bss_update(struct cfg80211_registered_device *rdev,
 					 &hidden->hidden_list);
 				hidden->refcount++;
 
-				ies = (void *)rcu_dereference(new->pub.beacon_ies);
+				ies = (void *)rcu_access_pointer(new->pub.beacon_ies);
 				rcu_assign_pointer(new->pub.beacon_ies,
 						   hidden->pub.beacon_ies);
 				if (ies)


  reply	other threads:[~2024-01-03 11:38 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-01-03 11:04 syzbot
2024-01-03 11:33 ` Edward Adam Davis [this message]
2024-01-03 11:58   ` syzbot
2024-01-03 12:13 ` [PATCH net-next] wifi: fix warning " Edward Adam Davis

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