From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 1C940256D for ; Tue, 18 Apr 2023 12:23:49 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 67392C4339C; Tue, 18 Apr 2023 12:23:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1681820629; bh=YzRUwLwbwJenkdyUFzBK52VgfD3vlcZhzD2inaeePss=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ut7HoXu3trGy2chDER1AXT7bEVx70M/3IPkp4cCCqC3K4d2QfNnDf4RtRucQg7uKq 2jCqGs//WSCCGTqO4qUo4yudEiejI8HdqahYv0dIhY4/cBnUiojSIx1WBsdQNPdAj9 XFxpVW4vUxsLk6T+YCRQ69pMMDiJ0q2EHxatv5BI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Brian Coverstone , Felix Fietkau , Johannes Berg , Sasha Levin Subject: [PATCH 4.14 02/37] wifi: mac80211: fix invalid drv_sta_pre_rcu_remove calls for non-uploaded sta Date: Tue, 18 Apr 2023 14:21:12 +0200 Message-Id: <20230418120254.768428722@linuxfoundation.org> X-Mailer: git-send-email 2.40.0 In-Reply-To: <20230418120254.687480980@linuxfoundation.org> References: <20230418120254.687480980@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Felix Fietkau [ Upstream commit 12b220a6171faf10638ab683a975cadcf1a352d6 ] Avoid potential data corruption issues caused by uninitialized driver private data structures. Reported-by: Brian Coverstone Fixes: 6a9d1b91f34d ("mac80211: add pre-RCU-sync sta removal driver operation") Signed-off-by: Felix Fietkau Link: https://lore.kernel.org/r/20230324120924.38412-3-nbd@nbd.name Signed-off-by: Johannes Berg Signed-off-by: Sasha Levin --- net/mac80211/sta_info.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c index 0d5265adf5396..4e406cd115738 100644 --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -942,7 +942,8 @@ static int __must_check __sta_info_destroy_part1(struct sta_info *sta) list_del_rcu(&sta->list); sta->removed = true; - drv_sta_pre_rcu_remove(local, sta->sdata, sta); + if (sta->uploaded) + drv_sta_pre_rcu_remove(local, sta->sdata, sta); if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN && rcu_access_pointer(sdata->u.vlan.sta) == sta) -- 2.39.2