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=-9.8 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,URIBL_BLOCKED,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 4F322C3A5A1 for ; Thu, 22 Aug 2019 17:30:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 21786206DD for ; Thu, 22 Aug 2019 17:30:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1566495005; bh=OqUlSWwlBz+qV011yxJ500U81Tx/3ZyNeUganH6IQxg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=eiM/IV6XCKUo4UqczRmo5v/Du/Rzl2AL/jm4g4H/mMg3pXnOMdETVeqYRa5/b74C5 hzK0ysX18YG1J/uZzXpApHcCbgYTpqP3OiNr279TCpRO2L3gmjJjKhDxuecYe+KxfY g+CKnUK/tdY0xnZkpdoDL5gyNEQQvAFKN/CQdIbo= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392106AbfHVRaE (ORCPT ); Thu, 22 Aug 2019 13:30:04 -0400 Received: from mail.kernel.org ([198.145.29.99]:51512 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2404673AbfHVR0P (ORCPT ); Thu, 22 Aug 2019 13:26:15 -0400 Received: from localhost (wsip-184-188-36-2.sd.sd.cox.net [184.188.36.2]) (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 A627A206DD; Thu, 22 Aug 2019 17:26:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1566494774; bh=OqUlSWwlBz+qV011yxJ500U81Tx/3ZyNeUganH6IQxg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JZIKcNJbY128kKL8k4KGi5qaTGiQfDH+k2kP2joff1PUgWPHVPtkxsSzZigETD8eB UFFZcOJc3SVE+g84p53PeBBg+ib40HvlDLNiuKUfv+0VQXR1ZG233IKyC92tfCO7l5 eoF12r5SRS0ysqahauW5v3iMYTLt2j4pIW3h+Rlg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Naresh Kamboju , Masami Hiramatsu , Will Deacon , Sasha Levin Subject: [PATCH 4.19 44/85] arm64: unwind: Prohibit probing on return_address() Date: Thu, 22 Aug 2019 10:19:17 -0700 Message-Id: <20190822171733.206317448@linuxfoundation.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20190822171731.012687054@linuxfoundation.org> References: <20190822171731.012687054@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org [ Upstream commit ee07b93e7721ccd5d5b9fa6f0c10cb3fe2f1f4f9 ] Prohibit probing on return_address() and subroutines which is called from return_address(), since the it is invoked from trace_hardirqs_off() which is also kprobe blacklisted. Reported-by: Naresh Kamboju Signed-off-by: Masami Hiramatsu Signed-off-by: Will Deacon Signed-off-by: Sasha Levin --- arch/arm64/kernel/return_address.c | 3 +++ arch/arm64/kernel/stacktrace.c | 3 +++ 2 files changed, 6 insertions(+) diff --git a/arch/arm64/kernel/return_address.c b/arch/arm64/kernel/return_address.c index 933adbc0f654d..0311fe52c8ffb 100644 --- a/arch/arm64/kernel/return_address.c +++ b/arch/arm64/kernel/return_address.c @@ -11,6 +11,7 @@ #include #include +#include #include #include @@ -32,6 +33,7 @@ static int save_return_addr(struct stackframe *frame, void *d) return 0; } } +NOKPROBE_SYMBOL(save_return_addr); void *return_address(unsigned int level) { @@ -55,3 +57,4 @@ void *return_address(unsigned int level) return NULL; } EXPORT_SYMBOL_GPL(return_address); +NOKPROBE_SYMBOL(return_address); diff --git a/arch/arm64/kernel/stacktrace.c b/arch/arm64/kernel/stacktrace.c index 4989f7ea1e599..bb482ec044b61 100644 --- a/arch/arm64/kernel/stacktrace.c +++ b/arch/arm64/kernel/stacktrace.c @@ -18,6 +18,7 @@ #include #include #include +#include #include #include #include @@ -85,6 +86,7 @@ int notrace unwind_frame(struct task_struct *tsk, struct stackframe *frame) return 0; } +NOKPROBE_SYMBOL(unwind_frame); void notrace walk_stackframe(struct task_struct *tsk, struct stackframe *frame, int (*fn)(struct stackframe *, void *), void *data) @@ -99,6 +101,7 @@ void notrace walk_stackframe(struct task_struct *tsk, struct stackframe *frame, break; } } +NOKPROBE_SYMBOL(walk_stackframe); #ifdef CONFIG_STACKTRACE struct stack_trace_data { -- 2.20.1