From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-333748-1524839849-2-14815211582618773338 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, HEADER_FROM_DIFFERENT_DOMAINS 0.25, MAILING_LIST_MULTI -1, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='US', FromHeader='org', MailFrom='org' X-Spam-charsets: plain='UTF-8' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: stable-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=fm2; t= 1524839848; b=BlrLv5LKXO2M0s4ug4dWNwsk0Do2Ju0LBpufaMKYvYRGMGn2iD whPpdMM9bqDKGYgP862dGalru/wtsT/6CbT2pQbUrj1L0zaaZPs8wTvoV4Ffeudw em/dnA27VZ1UJrktDEtVT1e0KmkxgtF+J9Di8mhPdI6Ai6W+PvTW9QCpSdosUAVA +yRiwkcwB90b2CG7zwvXpOsT7xjKokwhm4nyzvsCVyB1CIwni6JsZOI42NptNuYj dBa5IXghaWL48fyNfrwZJ/zUvU0YnA4u/5xMFU7NmWdWeiRbd6n7GNkJsOXm6GBN vsPke5RYJM8i2NY61LeV7dhImW+nmXrsh+cA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=from:to:cc:subject:date:message-id :in-reply-to:references:mime-version:content-type:sender :list-id; s=fm2; t=1524839848; bh=tA+VxDMUqqLTVn/qxkpG+f7qeAACcZ RJSPamu9Ta65M=; b=eAyhzMe/zyd17a5mZ+EzJKsdGz2e15+sM/avEZYB7E/b5z 5dLpRwhnNBP4v/SoIILWWAOPvuT9VWrr0JrwUcDsMKXeMPR/BuXc1YYGzCYAYUcq SJnK0m36FRKK4Kv0Q34g/zRCJea1CEfEqgh1JgvMmrO7G72D11pxyjLt+Nv1F9vO 5Mf8g8jbKx1k/359qE+sFXNGfr/KBtisxLQuYWPtC4wSzWC7h6Ho82lcyLuBwMmW qHVWpDGJ/VOpvik3n6aLAsDJMld4FVcYpxw0aKQv5CsCY6CQL3i/g/8GVdvm/Dwh DN2l1foTRJ7yNJky5uGzWuQlA+LUGUY74Z1xlsRQ== ARC-Authentication-Results: i=1; mx5.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-cm=none score=0; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes; x-vs=clean score=-100 state=0 Authentication-Results: mx5.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=linuxfoundation.org; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=stable-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-cm=none score=0; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=linuxfoundation.org header.result=pass header_is_org_domain=yes; x-vs=clean score=-100 state=0 X-ME-VSCategory: clean X-CM-Envelope: MS4wfOUAukEU8k/1Px0LrlqGDTHue4TTkkicqhoRPoKmkzodHr7EPWGFDpuQVgY1MS6VSisY7O2oVADAnFISNxqC1k+59shY/oq5gJT8jgZ+rvc/s1KYi2pO znfzJb866gzCjdkeGyyc4irHz8IhS9hiksRw6DkPTpHiVJa32PLfS6+Q0MMCC3gASYpHf5rnVpcBpgIIhOlUVAGBIRn+EbPt8ReThxHGQQwWXnP4/wdCuu3d X-CM-Analysis: v=2.3 cv=NPP7BXyg c=1 sm=1 tr=0 a=UK1r566ZdBxH71SXbqIOeA==:117 a=UK1r566ZdBxH71SXbqIOeA==:17 a=IkcTkHD0fZMA:10 a=Kd1tUaAdevIA:10 a=VnNF1IyMAAAA:8 a=20KFwNOVAAAA:8 a=VwQbUJbxAAAA:8 a=ag1SF4gXAAAA:8 a=FLezYk6KdQednlvyLcUA:9 a=QEXdDO2ut3YA:10 a=AjGcO6oz07-iQ99wixmX:22 a=Yupwre4RP9_Eg_Bd0iYG:22 X-ME-CMScore: 0 X-ME-CMCategory: none Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934667AbeD0OJ1 (ORCPT ); Fri, 27 Apr 2018 10:09:27 -0400 Received: from mail.kernel.org ([198.145.29.99]:54782 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934654AbeD0OJZ (ORCPT ); Fri, 27 Apr 2018 10:09:25 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 12B6C21864 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linuxfoundation.org Authentication-Results: mail.kernel.org; spf=fail smtp.mailfrom=gregkh@linuxfoundation.org From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Ziqian SUN , Heiko Carstens , Martin Schwidefsky Subject: [PATCH 4.14 79/80] s390/uprobes: implement arch_uretprobe_is_alive() Date: Fri, 27 Apr 2018 15:59:12 +0200 Message-Id: <20180427135737.036266984@linuxfoundation.org> X-Mailer: git-send-email 2.17.0 In-Reply-To: <20180427135732.928644313@linuxfoundation.org> References: <20180427135732.928644313@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: stable-owner@vger.kernel.org X-Mailing-List: stable@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.14-stable review patch. If anyone has any objections, please let me know. ------------------ From: Heiko Carstens commit 783c3b53b9506db3e05daacfe34e0287eebb09d8 upstream. Implement s390 specific arch_uretprobe_is_alive() to avoid SIGSEGVs observed with uretprobes in combination with setjmp/longjmp. See commit 2dea1d9c38e4 ("powerpc/uprobes: Implement arch_uretprobe_is_alive()") for more details. With this implemented all test cases referenced in the above commit pass. Reported-by: Ziqian SUN Cc: # v4.3+ Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky Signed-off-by: Greg Kroah-Hartman --- arch/s390/kernel/uprobes.c | 9 +++++++++ 1 file changed, 9 insertions(+) --- a/arch/s390/kernel/uprobes.c +++ b/arch/s390/kernel/uprobes.c @@ -150,6 +150,15 @@ unsigned long arch_uretprobe_hijack_retu return orig; } +bool arch_uretprobe_is_alive(struct return_instance *ret, enum rp_check ctx, + struct pt_regs *regs) +{ + if (ctx == RP_CHECK_CHAIN_CALL) + return user_stack_pointer(regs) <= ret->stack; + else + return user_stack_pointer(regs) < ret->stack; +} + /* Instruction Emulation */ static void adjust_psw_addr(psw_t *psw, unsigned long len)