Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   "Jose E. Marchesi" <jose.marchesi@oracle.com>
To:     Andrii Nakryiko <andrii.nakryiko@gmail.com>
Cc:     Daniel Rosenberg <drosen@google.com>, bpf@vger.kernel.org,
        Alexei Starovoitov <ast@kernel.org>,
        Daniel Borkmann <daniel@iogearbox.net>,
        John Fastabend <john.fastabend@gmail.com>,
        Andrii Nakryiko <andrii@kernel.org>,
        Martin KaFai Lau <martin.lau@linux.dev>,
        Song Liu <song@kernel.org>, Yonghong Song <yhs@fb.com>,
        KP Singh <kpsingh@kernel.org>,
        Stanislav Fomichev <sdf@google.com>,
        Hao Luo <haoluo@google.com>, Jiri Olsa <jolsa@kernel.org>,
        Shuah Khan <shuah@kernel.org>,
        Jonathan Corbet <corbet@lwn.net>,
        Joanne Koong <joannelkoong@gmail.com>,
        Mykola Lysenko <mykolal@fb.com>, linux-kernel@vger.kernel.org,
        linux-kselftest@vger.kernel.org, kernel-team@android.com
Subject: Re: [PATCH 0/3] Dynptr Verifier Adjustments
In-Reply-To: <CAEf4BzatBnBH8RHczLerMsW4NvTtx6xj5COjGzVvTkRxfciw4Q@mail.gmail.com>
        (Andrii Nakryiko's message of "Thu, 27 Apr 2023 16:42:40 -0700")
References: <20230406004018.1439952-1-drosen@google.com>
        <CAEf4BzZ2zjJKhyUtZKUxbNXJMggcot4MyNEeg6n4Lho-EVbBbg@mail.gmail.com>
        <CA+PiJmTHO3SPM_LvwFYWP+uf_KU4QytBshGzk78CZi8oGJ+rnw@mail.gmail.com>
        <CAEf4BzZ_4kcM5=Jo3JoWQWugS3wkrtoteyM8YqkykFvYywG+kg@mail.gmail.com>
        <CA+PiJmTsEsUi3c5soodZHxS_PvMPnJG-4bFvdfpLq-kPZ0j4UQ@mail.gmail.com>
        <CAEf4BzatBnBH8RHczLerMsW4NvTtx6xj5COjGzVvTkRxfciw4Q@mail.gmail.com>
Date:   Fri, 28 Apr 2023 11:03:57 +0200
Message-ID: <874jp0bcoy.fsf@oracle.com>
User-Agent: Gnus/5.13 (Gnus v5.13)
Content-Type: text/plain; charset=utf-8
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1
X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?SW4vSkJVcGxlT1NUN2FrSHByWGJnK0VTYnpOaGhRbVk1Q2d5RjhDVUxsZWJt?=
 =?utf-8?B?QkNLREFxMUMrMXpEVkhReW1ZdVdIZmRoY0ZlRTlXbWNwUC9ySUMzQlRkWGcv?=
 =?utf-8?B?QmpVUk9sUUl5UjBkd3cydXB1SmdUcGpib1FxYkNJM0k2WTFDakNMTWFWeDZh?=
 =?utf-8?B?N010RUpPS2oxMDVpY1lVaHowV3U5Q1hORzNYaTR1dFFWQzd1bWdDeEdZU0hH?=
 =?utf-8?B?Rm9ucC9pTWE0ZU1yTGZKb1hsdjBUYXNPN3RwNHdaSytQRkY5NmFzMjRZUEho?=
 =?utf-8?B?K0ZWZU9Qakx4VmdUR3ZpcG0zMktIZTdTc2xlanFXK2ZWUDhhWDBHTWpqcndH?=
 =?utf-8?B?cFdCbEZyV3N0YWlueHZlZ214Z2ZVdkhiTUhRWkNzWVZYNjQvN2R3b3hyT21h?=
 =?utf-8?B?eDhEaUY4ZzU2TGdidmVtUVQ5Wm85cG5tcXpXUEovQW0zZzdKYVNCRGppZmVG?=
 =?utf-8?B?L3U4L21QeFoxbDZCNEpHcmFONThzZ05sbjMxZUFGbTlHZUlzTkplQUV2cVVa?=
 =?utf-8?B?bW42L2w2Z0VkUzJwS0tBKzVCcE5SNlMrODY3eHFtVG8wczcwRXBnN0piSUlx?=
 =?utf-8?B?aHptNFhTN2M0UE1vR1IrSnkyWTU5ellIY1YvU0MxR2VmNm9qb0pZY2EzRzV5?=
 =?utf-8?B?SUVMYytDWHpoMWtYQmp1R3JtMVBWMmxtc3RuMFp3d2d3Wm1DOE0vS2JHRkwz?=
 =?utf-8?B?RXdOMmFuZjNLaVp2bk1jYzM3Rktxd1pyWFV6dk44VHdVaXFVejJhVDZCdHl4?=
 =?utf-8?B?cG5RRVVVRkQrNWo5aWNTWVd6UWExcXhjTEpreCtyYW82NFJ2SGlLWitSZkNk?=
 =?utf-8?B?VWUvYnh1cngyaHdtU291WXh2eERaRndITHdneHNCU2Y4QzJkVTVTMTB6dkZ1?=
 =?utf-8?B?WnI2VEZxRGJpVEF0Z25jcGhHYWM0ZVdmRjhtb2NLNVFPL3YvQjY3SktFbkhs?=
 =?utf-8?B?eTZpb0RwcHN5cVlHUVhvWWUyaXg4Zy9IeWVRNS9TVVRreWtHSEdCTklWbkFX?=
 =?utf-8?B?WWtNWWFXSTkzWUFqUTNucWFOSGpPVUtvNXFRT0E5bHhrN3ZGeGk1YW1xc2pS?=
 =?utf-8?B?WFBQQ2xNUXlydjZKV3F5OTVwL0tGUWZ6eVpBT3pNd3dJZTRqd1J0cUhacTl4?=
 =?utf-8?B?cmFlTFV6d3NvOWs2NWR5NG1OK3JWRmx4OFVJb2tmMHZlVnQzclFKbjVtNnlB?=
 =?utf-8?B?U0kzUWZIcWM2TWphK1V2T0lLQVlWbDVZM2hVN1hhbWZFRGR0My93T2I2UWRp?=
 =?utf-8?B?NEE5MzhqbkcrMExqZWk3VDlZMTRCcFc3K240S0toMmRuVDVpQVhVMlg0Wnox?=
 =?utf-8?B?akkwdmY3Y0toTmZSU0FZRmVCM3hEWlJEeXBvL3pQSWtMUGtSK1VHYndJNkNB?=
 =?utf-8?B?K0RZRXRJeXJYcDFWQUVTL0hJb1AyV3cxSVhMUk9HTS9sU2dqMSsycElRSlF4?=
 =?utf-8?B?UkVLZ29POElyTThWamlZMlp3L0lNWUpzWWNHVGl5S0NLdGVMQk9IK2JZSC9J?=
 =?utf-8?B?R3dUcC9ZZ0FCNzVHd0w3U1Z6cWo4RmNmT2pleEtmVEdGU0J2dllzSXdPZld4?=
 =?utf-8?B?ZjVPcUJkbDF5MHZ2Vm00RHZLc1czL3c3ZVo1WlVQc2VpdldnaVdFMWhQUld1?=
 =?utf-8?B?M2RiNVQyYWtvLzNVTng1UHVtL2dNdVlQdUtrbGlScFg3TWRReGUvdmh2MCt5?=
 =?utf-8?B?aDVoWUkyMCszVjhKME9lejZjU3o1aVNrQ05mK3VvMXUybE0vMmUrQytmTTlC?=
 =?utf-8?B?cFMrVlZaVW0vZk5VYzdTa2dOQk5qTzNsVXlSS0NvUVJDdjVWZkF3eGIzMDNl?=
 =?utf-8?B?V3F0eGRxZDc4WHNPVU9VUkovTzNpMUJaZ25zb0FrdG5rYVV6VmttdWVJZlZi?=
 =?utf-8?B?UnVYTEVnL1VtbzdUMzN0NTlNdXBXdUd4SklJc29ibWxUd1NyaTV6YXFnR1Bm?=
 =?utf-8?B?ek5EeWtuWm5wSmRqNEdSY3BRWHVRb0lBTVJzZWVpSFBDRlUrZVM5bkVDNS95?=
 =?utf-8?B?UG1OS3RqbitvNWdPdUFvbEQwOXZoNlE2YnpwQXNVQ2VmRWFsOWtWNHRldXVk?=
 =?utf-8?B?Q0o4TVZaeWNVazlZM1d4TVd6cnIzL29Xb05Ya2VaME1CVDMrQ3FncHFYSyt1?=
 =?utf-8?B?eTVXQXY2TzlOaTdMUUFha08xMm1pb0FOUzFQVGNjUFFPWVVhQkJMSGhGckdP?=
 =?utf-8?B?Qm1PRmsySmcvaVY1czNEYzJaSWU1RThYUGdiVDRxQW56ek9vY29ZWjF5MXQw?=
 =?utf-8?B?Wno3SXVyZURKd1lzSG1EVkNLRFhBPT0=?=
X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1
X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: =?utf-8?B?U2RYYUFoajh1dVJ2bDBvM3BrQm9UWW9jUDRmanNXT0VVaUhmdjY2T2FVK2cw?=
 =?utf-8?B?ek0xaVZuVmNYWXY5UGUzdTcxZDJoQUxxaGpaV0N3a0trblNlTzJDd0hmWDJ3?=
 =?utf-8?B?ODhPVFU4dmJEalIzemJ0YjFyUUJmVTIwbE1nN0hndWRtT0hmc3JiQ01nZXBY?=
 =?utf-8?B?Z2lTUXRvbXZidnRRZ0RaaEFvVVIxTHM1VUtZTVJyUE9MUEVkdFFqVFpJSnF0?=
 =?utf-8?B?b1c5L0MveXhTa0JSZWdJQ2RBbjJJZXhpWHA2cGtNUDVpbDZjSGhxY29zZ3Zk?=
 =?utf-8?B?dVJoL1o5V05jNTB1dzNoOFBKTXpFNXV5Znh2dG1nb2szbjhZU1JGMEFPUE1p?=
 =?utf-8?B?Vm9mMG1Zd3BpYXpPeiszME9qeGlRNHAyTGZKN05wRXo5YTNTT2NLYkNaMmFM?=
 =?utf-8?B?Y1NsNk1oMnM4NUdkN01aTE9tUUlaallVQjg3bzFZNjgydUVMTkY0bWtpUy9V?=
 =?utf-8?B?SXlRc3ZIelZCSXBKY0l5WGNkMk5jQlozRjRuUmZNS1V2LzZtY0VEZVZuZno1?=
 =?utf-8?B?d2dOdzF5R1ovMTNBZGlOWW1PTWVPcW9UYWdxaGplRUFpdGtlamU0WnpOMWlF?=
 =?utf-8?B?N2VnVzUxaXB6RERpejFLTWs5endJWEVyVnp3Znphd2QxYi84Z1ZwZlZnM0RO?=
 =?utf-8?B?MkdhV29ucWp6cmRzZ0RpbUUwMktJWTNzODhXMTZtMS9mOW9vdUxuYzZUNnZ3?=
 =?utf-8?B?NTFtVndjUytDRlo3ZGtVbmltY3pzWDdCRmRsSDVRRHhQbzlwY3JQR2MvQU1m?=
 =?utf-8?B?WS9zb2JmeVI1NTNKL3prRjJqeDdwRmd5ZXFUZ2s5bnVPemovOXdDZjZrdWI0?=
 =?utf-8?B?TEtjTGFyY1hIa2ZFa3UwZWhwNTN1V1BqVnAxR2VqbU1kT1dMNGhodW9VVFE5?=
 =?utf-8?B?Y3VpT2xkU3BDbmJpdEhkM1NZVDFFcFk0T3hDYnVsVURWd1F3UklTR1pwWGoz?=
 =?utf-8?B?NkExTWM0UFpvMzMrVlBKOWJncnF1KzhXcnN0MURqV3diR0QrSnBRelJUZUV0?=
 =?utf-8?B?QzZocFpXY0FnVElFMmh6dytZWVJkdTN1eUFXNHJsVTRyOVZxRFovUUlXb1ho?=
 =?utf-8?B?ZkY2UGxrZyswQWU5Z3ExRUpLem1udGVUcmt6RGd0T1RiaFZmRnVOanl2VmFh?=
 =?utf-8?B?NTZ5bVZCTzNDcE9mK21pdDNDc1RaakxWdlNwUmxBMnd5QUxwbDRVcDNHdHIw?=
 =?utf-8?B?WVdldFhYbUsvY0ZBZitnZmdQOG8vYmpLb2JZY2dvSC9tV1VVajV6SjJEa1pr?=
 =?utf-8?B?dk1JaUZuNVE5OHJWSy8yT2loSTJmMmVOUkdsK3lGK3ZVTDlkWmo2Y2ZEOFVv?=
 =?utf-8?Q?4sWZD7N8PuZH8=3D?=
X-OriginatorOrg: oracle.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 24476aa2-4d5c-4683-cc1a-08db47c7831f
X-MS-Exchange-CrossTenant-AuthSource: BYAPR10MB2888.namprd10.prod.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 28 Apr 2023 09:04:03.4111
 (UTC)
X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted
X-MS-Exchange-CrossTenant-Id: 4e2c6054-71cb-48f1-bd6c-3a9705aca71b
X-MS-Exchange-CrossTenant-MailboxType: HOSTED
X-MS-Exchange-CrossTenant-UserPrincipalName: VtlGARhMWV4d/TqdTu2lwBsT/0z0s8kQSGQJLNZFspngEy90UAfKTwC7W7+Qk9IMx5UcqmfurdRtU7D6eymPAhzBSHOW6Us7467oZ+elD9A=
X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR10MB7131
X-Proofpoint-Virus-Version: vendor=baseguard
 engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22
 definitions=2023-04-28_04,2023-04-27_01,2023-02-09_01
X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 mlxscore=0 phishscore=0
 adultscore=0 mlxlogscore=999 spamscore=0 bulkscore=0 suspectscore=0
 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303200000
 definitions=main-2304280073
X-Proofpoint-GUID: QcblucfBX1rLLrkurL_pnt2oc6Z__IrZ
X-Proofpoint-ORIG-GUID: QcblucfBX1rLLrkurL_pnt2oc6Z__IrZ
X-Spam-Status: No, score=-2.8 required=5.0 tests=BAYES_00,DKIM_SIGNED,
        DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_LOW,
        RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_NONE,T_SCC_BODY_TEXT_LINE
        autolearn=ham autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
        lindbergh.monkeyblade.net
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org


> On Thu, Apr 27, 2023 at 4:36=E2=80=AFPM Daniel Rosenberg <drosen@google.c=
om> wrote:
>>
>> On Wed, Apr 26, 2023 at 4:39=E2=80=AFPM Andrii Nakryiko
>> <andrii.nakryiko@gmail.com> wrote:
>> >
>> > Don't know, show the sequence of commands you are running?
>> >
>> > I have linux source in ~/linux, and KBUILD_OUTPUT set to
>> > ~/linux-build/default. And it only takes this:
>> >
>> > $ cd ~/linux
>> > $ make -j90 # build kernel
>> > $ cd tools/testing/selftests/bpf
>> > $ make -j90 # build selftests
>> >
>> > And that's it.
>>
>> I've tried the same, modulo some paths. I'm pretty sure it's version
>> related at this point.
>> The current issue I'm seeing is "error: indirect call in function,
>> which are not supported by eBPF" when using GCC-BPF for
>> progs/bind4_prog.c
>
> I don't think GCC-BPF is able to compile selftests properly just yet.
> So I guess the problem is that you do have some version of gcc-bpf in
> the system and selftest's Makefile tries to build gcc variants of
> test_progs? That's bad (I don't have GCC-BPF locally, and everyone
> else apparently as well).
>
> So for now just `make BPF_GCC=3D` ? CC'ing Jose, we should probably
> agree on some criteria of "GCC-BPF is really capable of building
> selftests" and adjust Makefile to only attempt GCC BPF build in that
> case.

Being able to run the selftests is our goal at the moment, but we are
not there yet, no.

What about making the kernel build system to emit a visible warning
before it builds the GCC variants of the tests programs?  Something like
"this is experimental and will likely fail".

>>
>> Currently using clang 16.0.0 and gcc 12.2.0-14.
>> I did manage to get it to build by just commenting out TEST_GEN_PROGS
>> +=3D test_progs-bpf_gcc