From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 B5CAB3A7D9E; Sat, 17 Oct 2026 17:02:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792256578; cv=none; b=NHMaD5RKX7X2g9cxtUaESK/tv2WaO4dUPTTevbA86HNsQFiHu12nxefLdyQegJL7cfrDnXe5mIAhxcHg4Je0yKmaFX6A6xOtNtJyL8xlL8O7P5hgi425ZYXvuqBSJAMQLyAH4F6eijBHF76qtsIT5fdLfs76y9ztnS+j1OMKJMs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1792256578; c=relaxed/simple; bh=Doo0T9qTybwIYUzWKDojxs9tM5vaSUFnWCWmZDSf8Uo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=WO9PR95nrDELjGGWd7lS5gRMt/y9B0T+IQuEMKFPiNTJbSJ8VlRd9y5rCDyQUN24bT/Uhi6osRJHyUO2DE0gYU9+vNQbWbkciXHDbM+INzfFxHc4FcSepiAuPebkKqsEVO1puPomPA7QgfocTP5vsEMCT1kJ5FzjFERi70BX7S0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=1vAxD7TE; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="1vAxD7TE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 105DE1F000C4; Sat, 17 Oct 2026 17:02:56 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1792256577; bh=H6+NI+LynejZo3GJSR+TSWCdd0GtqvOXm9Pq1wST8+I=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=1vAxD7TEyK/kLQ8lv6I05uvX4Cf5nUHh5V4zeuVNlRglNJBJj5d5y4AU8Jp3zvv8M h4kUa5P/3HyHHVZLAis0hNXcIW1oWgkllhnDfXVCuk1NHUZKoy6cbTPPugpW91BSLz SQcMmtWgqiD9bvsL3ddq3wREty+h1/r4c0AA99J4= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable , Joshua Rogers , Jiri Slaby Subject: [PATCH 6.6 0281/1674] tty: vcc: zero-initialize control packet in vcc_send_ctl() Date: Sat, 17 Oct 2026 17:42:33 +0200 Message-ID: <20261017160438.328678053@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261017160431.119607952@linuxfoundation.org> References: <20261017160431.119607952@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Joshua Rogers commit 1f71f565e3585da1098ff19ca3c24687dab59185 upstream. The stack-allocated struct vio_vcc pkt was partially initialized, leaving the tag.stype_env field uninitialized before being sent via ldc_write(), potentially leaking kernel stack data to the LDC peer. Assisted-by: AISLE:Snapshot Cc: stable Signed-off-by: Joshua Rogers Reviewed-by: Jiri Slaby Link: https://patch.msgid.link/20260803-aisle-tty-vcc-v2-1-a50bc9b15193@linuxfoundation.org Signed-off-by: Greg Kroah-Hartman --- drivers/tty/vcc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/tty/vcc.c +++ b/drivers/tty/vcc.c @@ -492,7 +492,7 @@ static ssize_t domain_show(struct device static int vcc_send_ctl(struct vcc_port *port, int ctl) { - struct vio_vcc pkt; + struct vio_vcc pkt = {}; int rv; pkt.tag.type = VIO_TYPE_CTRL;