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 X-Spam-Level: X-Spam-Status: No, score=-10.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8A279C4CEC5 for ; Fri, 13 Sep 2019 13:17:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5D9252171F for ; Fri, 13 Sep 2019 13:17:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1568380655; bh=6ILFhvEXDEnSURpR9RZAmjptUv5yCKrkEql3WkcJjys=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Ok0MOZPHV+FmQXDHJKvbp5G0LrFkNdgM3mP/LeOjH6qNDQS6VvhPfNJPqEOe1ClNO szII1+toV/HdEkMXkuGBykKwwq6az/tzHHfSGs/C2PZZBcHvbDhR1/S/7cTKTCwPWk PyoEAyyHLAWdmubQjJqI8Kv6FI09CKE72ex9tfMI= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390073AbfIMNRc (ORCPT ); Fri, 13 Sep 2019 09:17:32 -0400 Received: from mail.kernel.org ([198.145.29.99]:44742 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390065AbfIMNRa (ORCPT ); Fri, 13 Sep 2019 09:17:30 -0400 Received: from localhost (unknown [104.132.45.99]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 0C9A9206A5; Fri, 13 Sep 2019 13:17:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1568380649; bh=6ILFhvEXDEnSURpR9RZAmjptUv5yCKrkEql3WkcJjys=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ms2rfjVD3X7acwphQLEx22Mw0bxDCFKXWuqoByQuLPqgtPgvcOQuZMIxT+20cbxX2 6IIOPdwZjSuXjp9JdC80XiSlPd4Vs7QZpn6i0RA0nokbrWnfKVEpU/lX9HfIGvd2Y2 jOWNyMyY3X0VGWgfDkdeuQur0PrZNcW4WS3OPp7U= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Eugeniy Paltsev , Vineet Gupta , Sasha Levin Subject: [PATCH 4.19 133/190] ARC: mm: fix uninitialised signal code in do_page_fault Date: Fri, 13 Sep 2019 14:06:28 +0100 Message-Id: <20190913130610.582710456@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20190913130559.669563815@linuxfoundation.org> References: <20190913130559.669563815@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org [ Upstream commit 121e38e5acdc8e1e4cdb750fcdcc72f94e420968 ] Commit 15773ae938d8 ("signal/arc: Use force_sig_fault where appropriate") introduced undefined behaviour by leaving si_code unitiailized and leaking random kernel values to user space. Fixes: 15773ae938d8 ("signal/arc: Use force_sig_fault where appropriate") Signed-off-by: Eugeniy Paltsev Signed-off-by: Vineet Gupta Signed-off-by: Sasha Levin --- arch/arc/mm/fault.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arc/mm/fault.c b/arch/arc/mm/fault.c index a0366f9dca051..535cf18e8bf2c 100644 --- a/arch/arc/mm/fault.c +++ b/arch/arc/mm/fault.c @@ -66,7 +66,7 @@ void do_page_fault(unsigned long address, struct pt_regs *regs) struct vm_area_struct *vma = NULL; struct task_struct *tsk = current; struct mm_struct *mm = tsk->mm; - int si_code; + int si_code = 0; int ret; vm_fault_t fault; int write = regs->ecr_cause & ECR_C_PROTV_STORE; /* ST/EX */ -- 2.20.1