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 C4E19D512 for ; Mon, 12 Jun 2023 10:38:00 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4F800C4339B; Mon, 12 Jun 2023 10:38:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1686566280; bh=lZmncEOXhR/DL4JLuP5p/9gz+poKWYx+qwIB+KuYEiw=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XrMTdweYLvngrqrUAWstvqQJ3yK6Y5q8c8dlmm9QMUcTGDXSnQeWyG0X8SmpizpQ5 SyEbXynN+MH69n/PdwO/XToUUcHbZhcAaAJRIW2DAPK0SgXIgfQq75As1cSWyBRJO2 gxYyxOPtWtvG5Qw6URI71C7FJJsMKJ75PnJ0JG/w= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Min Li , Luiz Augusto von Dentz Subject: [PATCH 5.15 63/91] Bluetooth: Fix use-after-free in hci_remove_ltk/hci_remove_irk Date: Mon, 12 Jun 2023 12:26:52 +0200 Message-ID: <20230612101704.698793684@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230612101702.085813286@linuxfoundation.org> References: <20230612101702.085813286@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: Luiz Augusto von Dentz commit c5d2b6fa26b5b8386a9cc902cdece3a46bef2bd2 upstream. Similar to commit 0f7d9b31ce7a ("netfilter: nf_tables: fix use-after-free in nft_set_catchall_destroy()"). We can not access k after kfree_rcu() call. Cc: stable@vger.kernel.org Signed-off-by: Min Li Signed-off-by: Luiz Augusto von Dentz Signed-off-by: Greg Kroah-Hartman --- net/bluetooth/hci_core.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -2697,10 +2697,10 @@ int hci_remove_link_key(struct hci_dev * int hci_remove_ltk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 bdaddr_type) { - struct smp_ltk *k; + struct smp_ltk *k, *tmp; int removed = 0; - list_for_each_entry_rcu(k, &hdev->long_term_keys, list) { + list_for_each_entry_safe(k, tmp, &hdev->long_term_keys, list) { if (bacmp(bdaddr, &k->bdaddr) || k->bdaddr_type != bdaddr_type) continue; @@ -2716,9 +2716,9 @@ int hci_remove_ltk(struct hci_dev *hdev, void hci_remove_irk(struct hci_dev *hdev, bdaddr_t *bdaddr, u8 addr_type) { - struct smp_irk *k; + struct smp_irk *k, *tmp; - list_for_each_entry_rcu(k, &hdev->identity_resolving_keys, list) { + list_for_each_entry_safe(k, tmp, &hdev->identity_resolving_keys, list) { if (bacmp(bdaddr, &k->bdaddr) || k->addr_type != addr_type) continue;