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,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 B1A6BC76191 for ; Thu, 18 Jul 2019 05:44:15 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 86F5F2077C for ; Thu, 18 Jul 2019 05:44:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="nbWCu1Eo"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="zAerCXhB" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 86F5F2077C Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=M5tWcUT/ZAvFIBVsXTFpgVDaYlVq3NGOx580EavPyA8=; b=nbWCu1EoSVWcm9 5g2dIiXFAagi4HmZ5MS6wvUjAk3O0Y9f4x8X2omNe9Mh8WtAIyjzOPU+NM/IYkLxx+6JKBqP2UQ/7 Fd1oda/WLgnvVMVzBkmRTYgyYvwbXwvNzE+F6SAxLnmSHr9GM0udvf2ojY0SpwMhEoE0U8nG636bd guXjdQaaH0qDdxRg/vagbmvpejww82NEPu5oOMAXBZxhikkEtQgYNzUuF+hMkDSgIFcZ5kKnnfzUx UxOrm6YzX7lEOMe6fPrOgJa27YNFroA90KUrDTH15oGXe/MLN0pUB+M2oMUWxwzzjJt+35kexHmHP 8m3dwzPnyo2oJ7HQX81g==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1hnzDC-0007Zj-Oa; Thu, 18 Jul 2019 05:44:15 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1hnzCr-0007IR-4H for linux-arm-kernel@lists.infradead.org; Thu, 18 Jul 2019 05:43:55 +0000 Received: from localhost.localdomain (115.42.148.210.bf.2iij.net [210.148.42.115]) (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 5764E2077C; Thu, 18 Jul 2019 05:43:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1563428632; bh=d2K631q1iz4c8zbaSDa5ag8ChRtWqT8DbZvzcJhGp9Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zAerCXhB3BOgWOMlogRoU/hyPegSHhCygHLwo1kd6iwx1RqUL4OSgXUe70hayRlW/ Btbk7skV3VX7dMrUwTPaM+hv7oVOg2uif7pSskATwDKLs8Zwc2Sr0fwKWVH5gz9nTl CbcGME2dhJido3v5LLXRHJMKEEUINj8zcij1ti9c= From: Masami Hiramatsu To: Catalin Marinas , Will Deacon Subject: [PATCH 2/3] arm64: unwind: Prohibit probing on return_address() Date: Thu, 18 Jul 2019 14:43:48 +0900 Message-Id: <156342862798.8565.9291111633472675262.stgit@devnote2> X-Mailer: git-send-email 2.20.1 In-Reply-To: <156342860634.8565.14804606041960884732.stgit@devnote2> References: <156342860634.8565.14804606041960884732.stgit@devnote2> User-Agent: StGit/0.17.1-dirty MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190717_224353_539205_A7C2ABBA X-CRM114-Status: GOOD ( 11.98 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Dan Rue , Daniel Diaz , Anders Roxell , Naresh Kamboju , linux-kernel@vger.kernel.org, Matt Hart , linux-arm-kernel@lists.infradead.org, mhiramat@kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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 --- arch/arm64/kernel/return_address.c | 4 +++- arch/arm64/kernel/stacktrace.c | 3 +++ 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kernel/return_address.c b/arch/arm64/kernel/return_address.c index b21cba90f82d..7f8a143268b0 100644 --- a/arch/arm64/kernel/return_address.c +++ b/arch/arm64/kernel/return_address.c @@ -8,6 +8,7 @@ #include #include +#include #include #include @@ -17,7 +18,7 @@ struct return_address_data { void *addr; }; -static int save_return_addr(struct stackframe *frame, void *d) +static nokprobe_inline int save_return_addr(struct stackframe *frame, void *d) { struct return_address_data *data = d; @@ -52,3 +53,4 @@ 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 62d395151abe..cd7dab54d17b 100644 --- a/arch/arm64/kernel/stacktrace.c +++ b/arch/arm64/kernel/stacktrace.c @@ -7,6 +7,7 @@ #include #include #include +#include #include #include #include @@ -73,6 +74,7 @@ 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) @@ -87,6 +89,7 @@ void notrace walk_stackframe(struct task_struct *tsk, struct stackframe *frame, break; } } +NOKPROBE_SYMBOL(walk_stackframe); #ifdef CONFIG_STACKTRACE struct stack_trace_data { _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel