From patchwork Wed Jan 3 12:13:51 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Edward Adam Davis X-Patchwork-Id: 13509967 X-Patchwork-Delegate: johannes@sipsolutions.net Received: from out203-205-221-231.mail.qq.com (out203-205-221-231.mail.qq.com [203.205.221.231]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 64A3F18ECD; Wed, 3 Jan 2024 12:20:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=qq.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=qq.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=qq.com header.i=@qq.com header.b="oX6ZihZ4" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qq.com; s=s201512; t=1704284404; bh=hsWvIYTjGOuzkSHY0cRhuMQ9nYrh1dhhCxx/OjJphEE=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=oX6ZihZ4T4XuarlFE0ha55Wc7LoMXc83phzHQ1CcTHsNY2ZvCq79l+NkrA73F6/XO Y9pjC507eoK0hUylolKltPJoNMvjIctpewNlZDzxRjQ6yWzzg4LdCc7GAxdlYZrfT2 X9ZqaaAWCib0Uu2IjJFUitl4dOUm/U1NIxDZsPiE= Received: from pek-lxu-l1.wrs.com ([111.198.225.215]) by newxmesmtplogicsvrsza1-0.qq.com (NewEsmtp) with SMTP id 3721BE1A; Wed, 03 Jan 2024 20:13:50 +0800 X-QQ-mid: xmsmtpt1704284030t5lk8klny Message-ID: X-QQ-XMAILINFO: MQ+wLuVvI2LQx1ZWRYQcqrrru8adTGjx2DK1zZieGMM5Y/1cc8/R+Ey5dg6t3b gz93V4CrPQDU+BFuJzi3BlheLDoS5kXDJ51uNlcEUX5iGsPdruRlZwXhieqrjGDf6Gg/Dbnuv4OF vgihRqlzDkquI9+ef1p+WCDI12EF634TMfKkWQbw3nzkseFvplzB2uctkUTD0xnmCqrehHPIeG5k 0JDJ/rS655z+U3JUZUEmzTfMDsdAa4tOwp8yLXO8Y4zqUNXwbrGFCPfoYrvuRxdllOf1tB/h7tBP vk1H05stOWsAFPMar1bLL1LZRuNZzu3eMORR8vzJsU/iCmz3ZSJr8YkLawH6cxZrI4EmLs7+xkgV IquvIwjLDyi7hKFpDXqBb1cCzNHzUNHNVPdxnmnVHf53S41t0I16aAXzVKL1bJovnUB4BD7t+QWA TOQ9K3OHVXDwsELv22PSv2Dov5IP9PHU9Uj9rsIikv34IqTAYl5Hg9lvdBTdAn+7CS/6Hf1UPq2K vayA+0WyzvOUySvq0QxsyIPxeZ1gUtOpSW8JXBYLzGqOYcOGj1mPmQ6Oua1EH8c4JSlc1M1+CiAO +V3u+W3E1vgv1o8kKG45HG46A1S4wu0JF4i4e8qUSGYaP4677BL3cZ1KANKiWJB076GUwog6c/fU WbqsZDuoebMfU/5iwuguhcW/ED+3d7BujXalYnJaMO2tnjEjqNtcXvjTd1+DGxSi2a7Rhx3Q/pwR wXNWnzboVOkELgL6oJCePZ8eajmYLwRVEtYkGPYQnVbfmxZYFuqMLMOO7QLnPd+FJqHsnICMQgAC mG70DP2IrSK1KdtMnWwa5zze18Wnt8R9UiG7864zddXfDEQsAXpM3l0+EjqHne7skv5HtJo+XFJt qUmAaBqfLXBn9WlAAwbcu6/gpOwErsnP1UaBqGnicQa+hyCXoM0tQqj9+R8eRse7ANkb/cuSa7 X-QQ-XMRINFO: Mp0Kj//9VHAxr69bL5MkOOs= From: Edward Adam Davis To: syzbot+864a269c27ee06b58374@syzkaller.appspotmail.com Cc: benjamin.berg@intel.com, davem@davemloft.net, edumazet@google.com, johannes.berg@intel.com, johannes@sipsolutions.net, kuba@kernel.org, linux-kernel@vger.kernel.org, linux-wireless@vger.kernel.org, miriam.rachel.korenblit@intel.com, netdev@vger.kernel.org, pabeni@redhat.com, syzkaller-bugs@googlegroups.com Subject: [PATCH net-next] wifi: fix warning in __cfg80211_bss_update Date: Wed, 3 Jan 2024 20:13:51 +0800 X-OQ-MSGID: <20240103121350.2734479-2-eadavis@qq.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <0000000000009fa770060e089409@google.com> References: <0000000000009fa770060e089409@google.com> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Replace rcu_dereference() with rcu_access_pointer() to avoid warnings. Fixes: 32af9a9e1069 ("wifi: cfg80211: free beacon_ies when overridden from hidden BSS") Reported-and-tested-by: syzbot+864a269c27ee06b58374@syzkaller.appspotmail.com Signed-off-by: Edward Adam Davis --- net/wireless/scan.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/wireless/scan.c b/net/wireless/scan.c index cf2131671..7cb8ae87c 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)