From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793210987; b=BcGvNYkgAtkZtoveQ36bHpHyAzfJWfcFNQIKtag+cUAtaeLDp4mr1aKqkmCgXo7dRVCn QTxWU77mOc5YA3PHrXat6ryn784wHjyrmhzjod8oEjk9+fhPncXWwmkBLQ1NyukwD+g/Y UjIUA2az8IktjDT+oBU72qvlLv7jWiYB5zQqx4BcGSvaYkKPQsFRZJqGl5g5TxvIwjWlJ fdatpiAt6k2pu34xubN0fmm6cy3vYbp2UTvP+d7J8lZ/lx5hHM7u/T7SbqU/kmApDCW5E G7OnFcD4KHg5BsCgNwsLYaXSTscopAXjKbUiARZmDg2fpX9UKsWFaFfozFmyguiyyFg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793210987; h=Received:DKIM-Signature:From:To:Cc:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:User-Agent:X-stable:X-Patchwork-Hint: MIME-Version:Content-Transfer-Encoding; bh=R0QqxZl0S9ALZymRycoWmo7tgUeN9xFSeM+w02Kc9bg=; b=iGhJnHllVazVnvMFJzxXANn/pEnBESEN/UuSoAhokIwPgJr4KUfNzri9mSHLkQJgVtVo tuD8tg+dKRGDpSik5tl2bJOEXx4N2rvV6QtvSxw2nqcV9Nn2oOcRqsC5LbiXPuaVvfkVA lE5V26NunnZuDGhUwyhoXiicOCGS7a5Rz7YGwlSIhVpMzepLeOGG++cBemIMpDKRbH0sG rJY65morKVCC1W+bC6hcGqMDtvO3+Al5pdNH2t0mAXgyeqB/KtUG6Xj1s7UAWFWR3kpie C5xx9J8mlSwq82yvS4h9XCVipAD5Sm1T8Hr+f2rAQA8x6g98RCd8rYbvjHvmYll0q9w== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=bdGuF7H+; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7B57A60A2611; Wed, 28 Oct 2026 18:09:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.a=rsa-sha256 header.s=korg header.b=bdGuF7H+ Received: by smtp.kernel.org (Postfix) with ESMTPSA id CC6FE1F01829; Wed, 28 Oct 2026 18:09:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1793210987; bh=R0QqxZl0S9ALZymRycoWmo7tgUeN9xFSeM+w02Kc9bg=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=bdGuF7H+wkqryE0UN/x4CWKpOv9gTMIAV898/HMXwtwURyPAHsl8d5dmFpBaKCG+h KGBJONTbvtAnuJDWzpKoHezdoa6chQIejMcvlEIwl/v+uWdkKJ3x6K24Gp2uzpAskQ mLyRRxohVMF2AlXZTcY3UDDXTP9fsGEzZnyOVZU8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable , Joshua Rogers , Jiri Slaby Subject: [PATCH 5.15 217/571] tty: vcc: zero-initialize control packet in vcc_send_ctl() Date: Wed, 28 Oct 2026 17:56:04 +0100 Message-ID: <20261028170013.152013360@linuxfoundation.org> X-Mailer: git-send-email 2.56.0 In-Reply-To: <20261028170008.009143722@linuxfoundation.org> References: <20261028170008.009143722@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore X-Mailing-List: patches@lists.linux.dev List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.15-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 @@ -491,7 +491,7 @@ 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;