From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A02EECCA47B for ; Mon, 13 Jun 2022 13:41:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1378559AbiFMNls (ORCPT ); Mon, 13 Jun 2022 09:41:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57186 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1379210AbiFMNkC (ORCPT ); Mon, 13 Jun 2022 09:40:02 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3FF72B4A7; Mon, 13 Jun 2022 04:30:03 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id CFDDF61236; Mon, 13 Jun 2022 11:30:02 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DB2FCC34114; Mon, 13 Jun 2022 11:30:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1655119802; bh=8FwBDfYhettJ1LzaDvTKnMnazp4mrmKa5FRrQbl3aNk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=k1shSv/EIFlDk9JUgFxgdAzkk998sb7+OvyC5Z51FubRrwSyljl8RFKLexQaWewiF TrlpnPGqxuEA7b7GdnG+1Kr8J3xX1H7Z6odiHn3PO4yG6BxP7N4pzwArVg/cHbS8PW JM6YmJF2wun+8MefZiykBR0k8Z6SM2fY0Zpb4YZk= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, syzbot+e820fdc8ce362f2dea51@syzkaller.appspotmail.com, Jon Maloy , Hoang Le , Jakub Kicinski , Sasha Levin Subject: [PATCH 5.18 145/339] tipc: check attribute length for bearer name Date: Mon, 13 Jun 2022 12:09:30 +0200 Message-Id: <20220613094931.081079291@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220613094926.497929857@linuxfoundation.org> References: <20220613094926.497929857@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Hoang Le [ Upstream commit 7f36f798f89bf32c0164049cb0e3fd1af613d0bb ] syzbot reported uninit-value: ===================================================== BUG: KMSAN: uninit-value in string_nocheck lib/vsprintf.c:644 [inline] BUG: KMSAN: uninit-value in string+0x4f9/0x6f0 lib/vsprintf.c:725 string_nocheck lib/vsprintf.c:644 [inline] string+0x4f9/0x6f0 lib/vsprintf.c:725 vsnprintf+0x2222/0x3650 lib/vsprintf.c:2806 vprintk_store+0x537/0x2150 kernel/printk/printk.c:2158 vprintk_emit+0x28b/0xab0 kernel/printk/printk.c:2256 vprintk_default+0x86/0xa0 kernel/printk/printk.c:2283 vprintk+0x15f/0x180 kernel/printk/printk_safe.c:50 _printk+0x18d/0x1cf kernel/printk/printk.c:2293 tipc_enable_bearer net/tipc/bearer.c:371 [inline] __tipc_nl_bearer_enable+0x2022/0x22a0 net/tipc/bearer.c:1033 tipc_nl_bearer_enable+0x6c/0xb0 net/tipc/bearer.c:1042 genl_family_rcv_msg_doit net/netlink/genetlink.c:731 [inline] - Do sanity check the attribute length for TIPC_NLA_BEARER_NAME. - Do not use 'illegal name' in printing message. Reported-by: syzbot+e820fdc8ce362f2dea51@syzkaller.appspotmail.com Fixes: cb30a63384bc ("tipc: refactor function tipc_enable_bearer()") Acked-by: Jon Maloy Signed-off-by: Hoang Le Link: https://lore.kernel.org/r/20220602063053.5892-1-hoang.h.le@dektech.com.au Signed-off-by: Jakub Kicinski Signed-off-by: Sasha Levin --- net/tipc/bearer.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c index 6d39ca05f249..932c87b98eca 100644 --- a/net/tipc/bearer.c +++ b/net/tipc/bearer.c @@ -259,9 +259,8 @@ static int tipc_enable_bearer(struct net *net, const char *name, u32 i; if (!bearer_name_validate(name, &b_names)) { - errstr = "illegal name"; NL_SET_ERR_MSG(extack, "Illegal name"); - goto rejected; + return res; } if (prio > TIPC_MAX_LINK_PRI && prio != TIPC_MEDIA_LINK_PRI) { -- 2.35.1