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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 95E15C3A5A2 for ; Tue, 3 Sep 2019 16:31:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 61BBA215EA for ; Tue, 3 Sep 2019 16:31:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1567528278; bh=DC2/254MyIulsavyqOQkDxVwwmDUGlRmSLs26nF3vxU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=mQUegUK8Y1LJZy/1uLcPNMmY9s2T6tiVpi+3maF/SW0h5Coq/zjk63NHLAuR9wzc/ mxOUCTlaCX5PYL8SdOdvfuMruqRLG24PBjo2Vcl4G1QKtWmB4l6op74bAHCclrjZai N+9Do/PppPtYkG69GYbnvH3erar/J7GRGgrm3Ty8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731013AbfICQbR (ORCPT ); Tue, 3 Sep 2019 12:31:17 -0400 Received: from mail.kernel.org ([198.145.29.99]:50434 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731130AbfICQ21 (ORCPT ); Tue, 3 Sep 2019 12:28:27 -0400 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 5CD6F2343A; Tue, 3 Sep 2019 16:28:26 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1567528107; bh=DC2/254MyIulsavyqOQkDxVwwmDUGlRmSLs26nF3vxU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=GrLJzsjJP4sPkToIIHDZ7T59roi/9DKNDl5+LbzpiqfhtAQJdc6Vcs3TS3cd13yUt ++70f8kyCuood1emHhGEw8NnwLu21t+RUQe1nsMAToVCHbSyHUMIZlg9O2PSZAZoVk 6D6Eda13ZI20HwBp85MTNyVduzKbF6k4+L/VNHTs= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Eugeniy Paltsev , Vineet Gupta , Sasha Levin , linux-snps-arc@lists.infradead.org Subject: [PATCH AUTOSEL 4.19 112/167] ARC: mm: fix uninitialised signal code in do_page_fault Date: Tue, 3 Sep 2019 12:24:24 -0400 Message-Id: <20190903162519.7136-112-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190903162519.7136-1-sashal@kernel.org> References: <20190903162519.7136-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Eugeniy Paltsev [ 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