From nobody Tue Jun 23 05:10:08 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 52169C433EF for ; Thu, 10 Mar 2022 12:10:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241655AbiCJMLB (ORCPT ); Thu, 10 Mar 2022 07:11:01 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53914 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S239440AbiCJMK7 (ORCPT ); Thu, 10 Mar 2022 07:10:59 -0500 Received: from szxga01-in.huawei.com (szxga01-in.huawei.com [45.249.212.187]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C15F51470C1 for ; Thu, 10 Mar 2022 04:09:57 -0800 (PST) Received: from kwepemi100024.china.huawei.com (unknown [172.30.72.53]) by szxga01-in.huawei.com (SkyGuard) with ESMTP id 4KDnsD2KZBzdb6l; Thu, 10 Mar 2022 20:08:32 +0800 (CST) Received: from kwepemm600010.china.huawei.com (7.193.23.86) by kwepemi100024.china.huawei.com (7.221.188.87) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.18; Thu, 10 Mar 2022 20:09:55 +0800 Received: from ubuntu1804.huawei.com (10.67.174.174) by kwepemm600010.china.huawei.com (7.193.23.86) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Thu, 10 Mar 2022 20:09:54 +0800 From: Li Huafei To: , CC: , , , , , , , , , , , Subject: [PATCH] x86/traps: Mark do_int3() NOKPROBE_SYMBOL Date: Thu, 10 Mar 2022 20:09:15 +0800 Message-ID: <20220310120915.63349-1-lihuafei1@huawei.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-Originating-IP: [10.67.174.174] X-ClientProxiedBy: dggems704-chm.china.huawei.com (10.3.19.181) To kwepemm600010.china.huawei.com (7.193.23.86) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Since kprobe_int3_handler() is called in do_int3(), probing do_int3() can cause a breakpoint recursion and crash the kernel. Therefore, do_int3() should be marked as NOKPROBE_SYMBOL. Fixes: 21e28290b317 ("x86/traps: Split int3 handler up") Signed-off-by: Li Huafei Acked-by: Masami Hiramatsu --- arch/x86/kernel/traps.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index c9d566dcf89a..8143693a7ea6 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -659,6 +659,7 @@ static bool do_int3(struct pt_regs *regs) =20 return res =3D=3D NOTIFY_STOP; } +NOKPROBE_SYMBOL(do_int3); =20 static void do_int3_user(struct pt_regs *regs) { --=20 2.17.1