From patchwork Fri Apr 29 10:41:25 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 567744 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 C12DFC433EF for ; Fri, 29 Apr 2022 10:42:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1357771AbiD2Kp5 (ORCPT ); Fri, 29 Apr 2022 06:45:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59100 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1357767AbiD2Kpb (ORCPT ); Fri, 29 Apr 2022 06:45:31 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 45E2EC6665; Fri, 29 Apr 2022 03:42:08 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id D7AD762323; Fri, 29 Apr 2022 10:42:07 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E7571C385A4; Fri, 29 Apr 2022 10:42:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1651228927; bh=kO4IqmqhecTTjI1c3QBs2oCIiXGINhsrdjQ9SKOwUmk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Y3Xi00JKod735NHm4kAYcoZrLXU5Q2u7D+xvJzQE5SIly1t3abslFrPY9Ct/1zjrl lUv6fySA9nNHuXufiAMZeJbUrYOsMHmZZMLNkgWffj5Ye1xMHpshniVPToAJJEoPj7 PB8uf2OQTTavGQZi+B39uodJTXkMxrLaXNRdJ4KE= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Masami Hiramatsu Subject: [PATCH 4.19 08/12] Revert "ia64: kprobes: Fix to pass correct trampoline address to the handler" Date: Fri, 29 Apr 2022 12:41:25 +0200 Message-Id: <20220429104048.703832413@linuxfoundation.org> X-Mailer: git-send-email 2.36.0 In-Reply-To: <20220429104048.459089941@linuxfoundation.org> References: <20220429104048.459089941@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Masami Hiramatsu This reverts commit f5f96e3643dc33d6117cf7047e73512046e4858b. The commit f5f96e3643dc ("ia64: kprobes: Fix to pass correct trampoline address to the handler") was wrongly backported. It involves another commit which is a part of another bigger series, so it should not be backported to the stable tree. Signed-off-by: Masami Hiramatsu Signed-off-by: Greg Kroah-Hartman --- arch/ia64/kernel/kprobes.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) --- a/arch/ia64/kernel/kprobes.c +++ b/arch/ia64/kernel/kprobes.c @@ -411,8 +411,7 @@ static void kretprobe_trampoline(void) int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs) { - regs->cr_iip = __kretprobe_trampoline_handler(regs, - dereference_function_descriptor(kretprobe_trampoline), NULL); + regs->cr_iip = __kretprobe_trampoline_handler(regs, kretprobe_trampoline, NULL); /* * By returning a non-zero value, we are telling * kprobe_handler() that we don't want the post_handler @@ -428,7 +427,7 @@ void __kprobes arch_prepare_kretprobe(st ri->fp = NULL; /* Replace the return addr with trampoline addr */ - regs->b0 = (unsigned long)dereference_function_descriptor(kretprobe_trampoline); + regs->b0 = ((struct fnptr *)kretprobe_trampoline)->ip; } /* Check the instruction in the slot is break */ @@ -958,14 +957,14 @@ static struct kprobe trampoline_p = { int __init arch_init_kprobes(void) { trampoline_p.addr = - dereference_function_descriptor(kretprobe_trampoline); + (kprobe_opcode_t *)((struct fnptr *)kretprobe_trampoline)->ip; return register_kprobe(&trampoline_p); } int __kprobes arch_trampoline_kprobe(struct kprobe *p) { if (p->addr == - dereference_function_descriptor(kretprobe_trampoline)) + (kprobe_opcode_t *)((struct fnptr *)kretprobe_trampoline)->ip) return 1; return 0;