From patchwork Fri May 8 12:33:21 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 226120 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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, 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 E45E2C47257 for ; Fri, 8 May 2020 13:16:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AE88C20870 for ; Fri, 8 May 2020 13:16:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588943807; bh=5qwJ1HXduhShhqO66V2xRuZoNmsgUkmpW5HiZw1jGHg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=vzE2x01K1Y8XM5mUT9uErQvNw8rj/9WkRfrUk7cEw1QLcknPXfELnwYhfQSiglgv/ PebefVudv/tkMf5Mw3eRw6c795dSQSKt0iP1VIM3ldAIxQhHRXf8QdcGhjuG3AhKt1 F8c6khC1eaB8pzCiBHj0LdsUcQgLq7wtqC0+yKbU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729247AbgEHNQq (ORCPT ); Fri, 8 May 2020 09:16:46 -0400 Received: from mail.kernel.org ([198.145.29.99]:43338 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729220AbgEHMom (ORCPT ); Fri, 8 May 2020 08:44:42 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 1A1512145D; Fri, 8 May 2020 12:44:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1588941882; bh=5qwJ1HXduhShhqO66V2xRuZoNmsgUkmpW5HiZw1jGHg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=n0zOpcfs8wvyvdfWO888M0Ib4t/7wRE0MxS8fRcHBPKkkhah6aOjsDKgs8X5RnNv3 UHUZ67/UY5dhMnPaP3UVCmnjKCO2AoF9BEykWQe+TaeKSrs7dGZGBqnDzUvMPrsSOr eaLpegonuDfQl+L2jCCrgmQQrt2zYiEubnEicjrM= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Daniel Borkmann , Alexei Starovoitov , "David S. Miller" Subject: [PATCH 4.4 210/312] bpf, trace: check event type in bpf_perf_event_read Date: Fri, 8 May 2020 14:33:21 +0200 Message-Id: <20200508123139.179064292@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200508123124.574959822@linuxfoundation.org> References: <20200508123124.574959822@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Alexei Starovoitov commit ad572d174787daa59e24b8b5c83028c09cdb5ddb upstream. similar to bpf_perf_event_output() the bpf_perf_event_read() helper needs to check the type of the perf_event before reading the counter. Fixes: a43eec304259 ("bpf: introduce bpf_perf_event_output() helper") Reported-by: Daniel Borkmann Signed-off-by: Alexei Starovoitov Acked-by: Daniel Borkmann Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- kernel/trace/bpf_trace.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/kernel/trace/bpf_trace.c +++ b/kernel/trace/bpf_trace.c @@ -206,6 +206,10 @@ static u64 bpf_perf_event_read(u64 r1, u event->pmu->count) return -EINVAL; + if (unlikely(event->attr.type != PERF_TYPE_HARDWARE && + event->attr.type != PERF_TYPE_RAW)) + return -EINVAL; + /* * we don't know if the function is run successfully by the * return value. It can be judged in other places, such as