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 909F53DE443; Mon, 4 May 2026 14:25:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777904726; cv=none; b=uqwEq5zpgg9sQE28Bsc6xDb3oBI8kwK6OeIiYrgeOOw6kZeCqdfJ5Mh55EP32OpdO++eXGc1h7uplUmrNkrNMpALQDL06SX21V3EKVD5ZbaSr0y5/wPYHtAz9iYhdhTaxrqNRLGayUx9OVFIFC8O65eHWRumefX+rLHmWVLP328= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777904726; c=relaxed/simple; bh=mK8wlVE0dlQYoMgL5s99z+uj7Q7Xv6gsCaa0QGacVFk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=PWecUdjCWmOPbnVHViNsFDqJwoNo4dzxCg2vpgCku25nOtxgNQJbszDo3nJ7LRRRRpSlywE/5vURcb1RCSGU/cTAe9dS0An2UJ5Wqzfs+y1UhzZi5Lw9KBHzQrGpjuQPVUWZ3Jr6sEeLiBrlfqcW7/7TR5zj07b2had8LAyFV4Q= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=0u5i1KWJ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="0u5i1KWJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D6AC1C2BCB8; Mon, 4 May 2026 14:25:25 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1777904726; bh=mK8wlVE0dlQYoMgL5s99z+uj7Q7Xv6gsCaa0QGacVFk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=0u5i1KWJEG4gctmjYJ/iowaq2jv0F0HdfPb0kW42lSBDnM885nQ+1skVUYd1nDJnn gx1BhvZkPBPL6hHzyJKOoZxSS2OvtNPl3jN6PFQe/pT6VT2u9j+ZU5NPngW2Wt4eOy ZyAW9QmAAerfL845a7HPcvG79tMthq7w9X4oR7Xo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Shuvam Pandey , Luiz Augusto von Dentz Subject: [PATCH 6.12 151/215] Bluetooth: hci_event: fix potential UAF in SSP passkey handlers Date: Mon, 4 May 2026 15:52:50 +0200 Message-ID: <20260504135135.684147878@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260504135130.169210693@linuxfoundation.org> References: <20260504135130.169210693@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Shuvam Pandey commit 85fa3512048793076eef658f66489112dcc91993 upstream. hci_conn lookup and field access must be covered by hdev lock in hci_user_passkey_notify_evt() and hci_keypress_notify_evt(), otherwise the connection can be freed concurrently. Extend the hci_dev_lock critical section to cover all conn usage in both handlers. Keep the existing keypress notification behavior unchanged by routing the early exits through a common unlock path. Fixes: 92a25256f142 ("Bluetooth: mgmt: Implement support for passkey notification") Cc: stable@vger.kernel.org Signed-off-by: Shuvam Pandey Signed-off-by: Luiz Augusto von Dentz Signed-off-by: Greg Kroah-Hartman --- net/bluetooth/hci_event.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -5412,9 +5412,11 @@ static void hci_user_passkey_notify_evt( bt_dev_dbg(hdev, ""); + hci_dev_lock(hdev); + conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); if (!conn) - return; + goto unlock; conn->passkey_notify = __le32_to_cpu(ev->passkey); conn->passkey_entered = 0; @@ -5423,6 +5425,9 @@ static void hci_user_passkey_notify_evt( mgmt_user_passkey_notify(hdev, &conn->dst, conn->type, conn->dst_type, conn->passkey_notify, conn->passkey_entered); + +unlock: + hci_dev_unlock(hdev); } static void hci_keypress_notify_evt(struct hci_dev *hdev, void *data, @@ -5433,14 +5438,16 @@ static void hci_keypress_notify_evt(stru bt_dev_dbg(hdev, ""); + hci_dev_lock(hdev); + conn = hci_conn_hash_lookup_ba(hdev, ACL_LINK, &ev->bdaddr); if (!conn) - return; + goto unlock; switch (ev->type) { case HCI_KEYPRESS_STARTED: conn->passkey_entered = 0; - return; + goto unlock; case HCI_KEYPRESS_ENTERED: conn->passkey_entered++; @@ -5455,13 +5462,16 @@ static void hci_keypress_notify_evt(stru break; case HCI_KEYPRESS_COMPLETED: - return; + goto unlock; } if (hci_dev_test_flag(hdev, HCI_MGMT)) mgmt_user_passkey_notify(hdev, &conn->dst, conn->type, conn->dst_type, conn->passkey_notify, conn->passkey_entered); + +unlock: + hci_dev_unlock(hdev); } static void hci_simple_pair_complete_evt(struct hci_dev *hdev, void *data,