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,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,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 9B6E1C43387 for ; Tue, 15 Jan 2019 06:24:38 +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 6B8C220651 for ; Tue, 15 Jan 2019 06:24:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="nkKZm1EL"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="L0d+QhrA" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 6B8C220651 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=DiaKGFWla+k91KJJ+CNJAOusha0CwACeXtunORlnmPA=; b=nkKZm1EL/x67Nu wgMFivOVu8itKrKQhkitJ0RA7r5a8AN0Q7Hgkyg9dUF++pvKqYN200A3ECd2A1VFTH1bF1OUww4+3 83DzIz2TJFKGJEXDtD5SsHV0K+gMLR2eBOUbv8AnYL95K+L/su/SNrLZ2ZrZFv95XJMFj1MK/lETH zGsxqGSrt5rEKVgRSIgBsRjtBsgHlx8SwejS09TFuB6yd7lgk6GgyxbcKlv5fsCZTqT8vIdhzMqh0 V8BiN9huY3UJJFfqevbavlHGh7ymXtpd2As/A1DSSkUE0EHiSFGaAoemyi7n/D/Yh4MP+PzAVBYl9 w56kIuwlzhpzuuTIQiyA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gjI9M-00059H-Bi; Tue, 15 Jan 2019 06:24:36 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.90_1 #2 (Red Hat Linux)) id 1gjI9H-00058V-Jx for linux-arm-kernel@lists.infradead.org; Tue, 15 Jan 2019 06:24:34 +0000 Received: from localhost.localdomain (NE2965lan1.rev.em-net.ne.jp [210.141.244.193]) (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 20C9A20651; Tue, 15 Jan 2019 06:24:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1547533471; bh=JMPzgJxn71Oh3CSPLMfjWsZVP7P3WH3Nj9DBNFncCNU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=L0d+QhrAA1raIo2uM8j525TaubAY8kIQauQJKDLhiGMRqVv7wWbq6kWjXGfmxsoX9 NjbiDm+VqVFOQBA/Se3Wa+5BmE7KTsDD9dVaH/aQqtk8TKSR5vxfNesLDdvR8F+PSC IxwCzpAMu2a6FILbySzAk35WBJrHPMaoiYx+jvqM= From: Masami Hiramatsu To: Catalin Marinas , Will Deacon Subject: [PATCH v2 1/4] arm64: kprobes: Move extable address check into arch_prepare_kprobe() Date: Tue, 15 Jan 2019 15:24:08 +0900 Message-Id: <154753344814.31541.1870614689774287684.stgit@devbox> X-Mailer: git-send-email 2.13.6 In-Reply-To: <154753341900.31541.8135985235882849464.stgit@devbox> References: <154753341900.31541.8135985235882849464.stgit@devbox> 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-20190114_222431_783453_FC14C8C1 X-CRM114-Status: GOOD ( 12.13 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Pratyush Anand , linux-kernel , James Morse , Masami Hiramatsu , linux-arm-kernel@lists.infradead.org, "David A . Long" 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 Move extable address check into arch_prepare_kprobe() from arch_within_kprobe_blacklist(). The blacklist is exposed via debugfs as a list of symbols. The extable entries are smaller, so must be filtered out by arch_prepare_kprobe(). Signed-off-by: Masami Hiramatsu Reviewed-by: James Morse --- Update in v2: - Update commit message. - Add Reviewed-by from James. --- arch/arm64/kernel/probes/kprobes.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/arch/arm64/kernel/probes/kprobes.c b/arch/arm64/kernel/probes/kprobes.c index 2a5b338b2542..b2d4b7428ebc 100644 --- a/arch/arm64/kernel/probes/kprobes.c +++ b/arch/arm64/kernel/probes/kprobes.c @@ -102,6 +102,10 @@ int __kprobes arch_prepare_kprobe(struct kprobe *p) if (in_exception_text(probe_addr)) return -EINVAL; + + if (search_exception_tables(probe_addr)) + return -EINVAL; + if (probe_addr >= (unsigned long) __start_rodata && probe_addr <= (unsigned long) __end_rodata) return -EINVAL; @@ -477,8 +481,7 @@ bool arch_within_kprobe_blacklist(unsigned long addr) (addr >= (unsigned long)__entry_text_start && addr < (unsigned long)__entry_text_end) || (addr >= (unsigned long)__idmap_text_start && - addr < (unsigned long)__idmap_text_end) || - !!search_exception_tables(addr)) + addr < (unsigned long)__idmap_text_end)) return true; if (!is_kernel_in_hyp_mode()) { _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel