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=-5.9 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 6F4B8C48BDF for ; Fri, 18 Jun 2021 09:25:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3C87560C3D for ; Fri, 18 Jun 2021 09:25:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232424AbhFRJ1Q (ORCPT ); Fri, 18 Jun 2021 05:27:16 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]:40046 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231602AbhFRJ1O (ORCPT ); Fri, 18 Jun 2021 05:27:14 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1624008304; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=OudwFQoX7uDSqebBmwmgmYrBWQI2jkkXu2OD2Vo3jR8=; b=OiFMxDNf7TI/7trijrOlQwtVqNKeWI8ASbeAt2VRXVxNYm8rZv+sfpY7/+vQtm7bkQWg3S nIIGIhgM5b/5ooIz6En1B+xAmh9vX+GUqn+/FVsjkXrHMFn/x9hfkrns8QylPpIA/LqWFe tFboNqDrSuoWJRHys5BZiTBWtphJ3RM= Received: from mail-ej1-f70.google.com (mail-ej1-f70.google.com [209.85.218.70]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-158-w6uV0cESPN2DZJpiMSvQdQ-1; Fri, 18 Jun 2021 05:25:03 -0400 X-MC-Unique: w6uV0cESPN2DZJpiMSvQdQ-1 Received: by mail-ej1-f70.google.com with SMTP id f1-20020a1709064941b02903f6b5ef17bfso3634352ejt.20 for ; Fri, 18 Jun 2021 02:25:02 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:in-reply-to:references:date :message-id:mime-version; bh=OudwFQoX7uDSqebBmwmgmYrBWQI2jkkXu2OD2Vo3jR8=; b=eAIex+kIXlbKe9aAUSOQd2Ypf/sxPz9sFgfPzRUovAsOrGld/AOprlyhUlZ4uG+aqT t9840+LTo0Rz3MLmKJ5fC1Ju2QG2KG5N/e/8XXlUwDTbxSps3+eF84w8drBMeDQn8/br L0IUdNc52AuDEGv3gDUKXAscRyQ6irayG+02oIi6u0WDSrHdJEfEhP8MlsCDFV0+Dn3x 7FoAGpInk8auykmsrl7ps9f5/7+78eKp+FMFn6w8jSSt0bGXAr9V6TYt8n+W7X28qu1I CN/36C43bpwGhGIrc9YoHgd02x03/JoTHVj4Ho8CUz27LDLHBdzyDdnm0LhnsQ+T++ZC iY5w== X-Gm-Message-State: AOAM5316dU19mvH0KDdGY9aYagM2KWBWj42DRTf6ercm/4VQaTTbmxy9 NzilKM1SnsM2AJHsPEe0dF26QQ/WTa1od0FZapRA5xNJ8iC98Auxu1rx4Iz+dk93IqYVTbX8WCZ 4hJLrKD0UFoTRv2lM X-Received: by 2002:aa7:ccc1:: with SMTP id y1mr3628106edt.333.1624008301635; Fri, 18 Jun 2021 02:25:01 -0700 (PDT) X-Google-Smtp-Source: ABdhPJxsZWiOMzD7NW/t+XHjTSQG6Lg8SLty3IvGVjI+QDKwqYAXON7EWfmhIVtUI76AvF7BcyzbgA== X-Received: by 2002:aa7:ccc1:: with SMTP id y1mr3628077edt.333.1624008301255; Fri, 18 Jun 2021 02:25:01 -0700 (PDT) Received: from alrua-x1.borgediget.toke.dk ([2a0c:4d80:42:443::2]) by smtp.gmail.com with ESMTPSA id q9sm5975488edv.31.2021.06.18.02.25.00 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 18 Jun 2021 02:25:00 -0700 (PDT) Received: by alrua-x1.borgediget.toke.dk (Postfix, from userid 1000) id D73B4180350; Fri, 18 Jun 2021 11:24:58 +0200 (CEST) From: Toke =?utf-8?Q?H=C3=B8iland-J=C3=B8rgensen?= To: Anton Ivanov , netdev@vger.kernel.org Subject: Re: NULL pointer dereference in libbpf In-Reply-To: <6f6476fb-4b02-e543-6dad-aca3f9b5881c@kot-begemot.co.uk> References: <6f6476fb-4b02-e543-6dad-aca3f9b5881c@kot-begemot.co.uk> X-Clacks-Overhead: GNU Terry Pratchett Date: Fri, 18 Jun 2021 11:24:58 +0200 Message-ID: <87a6nnv82d.fsf@toke.dk> MIME-Version: 1.0 Content-Type: text/plain Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Anton Ivanov writes: > https://elixir.bootlin.com/linux/latest/source/tools/lib/bpf/bpf.c#L91 > > A string is copied to a pointer destination which has been memset to > zero a few lines above. No, it isn't. attr.map_name is an array... -Toke