From patchwork Thu May 20 09:21:09 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 445404 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=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, 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 4FF49C433ED for ; Thu, 20 May 2021 10:55:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 373F461028 for ; Thu, 20 May 2021 10:55:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238081AbhETK4W (ORCPT ); Thu, 20 May 2021 06:56:22 -0400 Received: from mail.kernel.org ([198.145.29.99]:52614 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238958AbhETKyW (ORCPT ); Thu, 20 May 2021 06:54:22 -0400 Received: by mail.kernel.org (Postfix) with ESMTPSA id 3D41A61CDC; Thu, 20 May 2021 10:00:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1621504857; bh=xkd1Q8CSeWpBA7drdtVw5G4L7ki6h1sqEX7D2Ik1PMU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=beGOulgwFQvBsja9zL1/CzIRukZC150FV0Ws4fi4/6QYpCqfVsxVopEWBUiQIUm3t vKhuKpoMCloLhBZ8otD9EkbgOQQjamM8tObM26m6RF8uYG4Q1PTAJs5cprUx+xZ05a z2t6PIDNleCi40nVfIU7hKtHiQlA+Xbo2sAa95lA= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Amey Telawane , Amit Pundir , "Steven Rostedt (VMware)" Subject: [PATCH 4.9 077/240] tracing: Use strlcpy() instead of strcpy() in __trace_find_cmdline() Date: Thu, 20 May 2021 11:21:09 +0200 Message-Id: <20210520092111.263634972@linuxfoundation.org> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20210520092108.587553970@linuxfoundation.org> References: <20210520092108.587553970@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Amey Telawane commit e09e28671cda63e6308b31798b997639120e2a21 upstream. Strcpy is inherently not safe, and strlcpy() should be used instead. __trace_find_cmdline() uses strcpy() because the comms saved must have a terminating nul character, but it doesn't hurt to add the extra protection of using strlcpy() instead of strcpy(). Link: http://lkml.kernel.org/r/1493806274-13936-1-git-send-email-amit.pundir@linaro.org Signed-off-by: Amey Telawane [AmitP: Cherry-picked this commit from CodeAurora kernel/msm-3.10 https://source.codeaurora.org/quic/la/kernel/msm-3.10/commit/?id=2161ae9a70b12cf18ac8e5952a20161ffbccb477] Signed-off-by: Amit Pundir [ Updated change log and removed the "- 1" from len parameter ] Signed-off-by: Steven Rostedt (VMware) Signed-off-by: Greg Kroah-Hartman --- kernel/trace/trace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -1875,7 +1875,7 @@ static void __trace_find_cmdline(int pid map = savedcmd->map_pid_to_cmdline[pid]; if (map != NO_CMDLINE_MAP) - strcpy(comm, get_saved_cmdlines(map)); + strlcpy(comm, get_saved_cmdlines(map), TASK_COMM_LEN); else strcpy(comm, "<...>"); }