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=-5.7 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 0CF03CA9EB5 for ; Mon, 4 Nov 2019 17:46:08 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (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 8906320848 for ; Mon, 4 Nov 2019 17:46:07 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="WeNBTpHJ"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="A1hxQoxU" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 8906320848 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 616991725; Mon, 4 Nov 2019 18:45:15 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 616991725 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1572889565; bh=sDO/RuttkBjwJSU67sxWGWLQsIk4T102cnk6PfADLso=; h=Date:From:To:In-Reply-To:References:Cc:Subject:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=WeNBTpHJiV8tLuZ0WvpomdV/nSXXAy3yqCcQ+INzarWLRFEyx8fwRRF5oXi98uj08 yPKLV7EmXJTlXXAl4+VZ1KgEVNN34ZtezD8mtXLQ2gA6U5RSiIkj6PX2XqH22VyN4S Yh/MYMOFtWagcns/kwiPE+gJVDKK0wSbHjSeiiow= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id C0C44F804FE; Mon, 4 Nov 2019 18:44:21 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 9DC5DF803F4; Mon, 4 Nov 2019 15:28:19 +0100 (CET) Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [205.139.110.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 78964F8015B for ; Mon, 4 Nov 2019 15:28:15 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 78964F8015B Authentication-Results: alsa1.perex.cz; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="A1hxQoxU" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1572877693; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=sXs+LDxO88IFopCBCdlf8Wk3p0+58YbIqWF2eEqPtpk=; b=A1hxQoxU1npiKEWAH6CAvAiH5tYCTMLi20WH7n5UwRDIR49lRden/F7MEsY8A9hjpRELC+ bIIpZ7Yw3vcYrW/yp2T4G0v2P5ClRarO5wM42YEdluzvdf2ryYBMA5X0EjegXbma6okgWT lH1hkWRNYPydpy6KzrH4sIJnfET55Fs= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-258-t_2Xk-g9NVCNSG-XGMKtLA-1; Mon, 04 Nov 2019 09:28:12 -0500 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 85AC48017DD; Mon, 4 Nov 2019 14:28:11 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 75D2E5D6C5; Mon, 4 Nov 2019 14:28:11 +0000 (UTC) Received: from zmail17.collab.prod.int.phx2.redhat.com (zmail17.collab.prod.int.phx2.redhat.com [10.5.83.19]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id 13CBF4BB5B; Mon, 4 Nov 2019 14:28:11 +0000 (UTC) Date: Mon, 4 Nov 2019 09:28:10 -0500 (EST) From: Jan Stancek To: Greg KH Message-ID: <1341418315.10342806.1572877690830.JavaMail.zimbra@redhat.com> In-Reply-To: <20191104135135.GA2162401@kroah.com> References: <2029139028.10333037.1572874551626.JavaMail.zimbra@redhat.com> <20191104135135.GA2162401@kroah.com> MIME-Version: 1.0 X-Originating-IP: [10.43.17.163, 10.4.195.10] Thread-Topic: =?utf-8?B?4p2MIEZBSUw6?= Test report for kernel 5.3.9-rc1-dfe283e.cki (stable) Thread-Index: Kx4pHL9z3NzPO+lMPvoi41zdd+kemg== X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-MC-Unique: t_2Xk-g9NVCNSG-XGMKtLA-1 X-Mimecast-Spam-Score: 0 X-Mailman-Approved-At: Mon, 04 Nov 2019 18:44:18 +0100 Cc: alsa-devel@alsa-project.org, Memory Management , Linux Stable maillist , Jaroslav Kysela , CKI Project , LTP Mailing List Subject: Re: [alsa-devel] =?utf-8?q?=E2=9D=8C_FAIL=3A_Test_report_for_kernel_5?= =?utf-8?q?=2E3=2E9-rc1-dfe283e=2Ecki_=28stable=29?= X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" CgotLS0tLSBPcmlnaW5hbCBNZXNzYWdlIC0tLS0tCj4gT24gTW9uLCBOb3YgMDQsIDIwMTkgYXQg MDg6MzU6NTFBTSAtMDUwMCwgSmFuIFN0YW5jZWsgd3JvdGU6Cj4gPiAKPiA+IAo+ID4gLS0tLS0g T3JpZ2luYWwgTWVzc2FnZSAtLS0tLQo+ID4gPiAKPiA+ID4gSGVsbG8sCj4gPiA+IAo+ID4gPiBX ZSByYW4gYXV0b21hdGVkIHRlc3RzIG9uIGEgcmVjZW50IGNvbW1pdCBmcm9tIHRoaXMga2VybmVs IHRyZWU6Cj4gPiA+IAo+ID4gPiAgICAgICAgS2VybmVsIHJlcG86Cj4gPiA+ICAgICAgICBnaXQ6 Ly9naXQua2VybmVsLm9yZy9wdWIvc2NtL2xpbnV4L2tlcm5lbC9naXQvc3RhYmxlL2xpbnV4LXN0 YWJsZS1yYy5naXQKPiA+ID4gICAgICAgICAgICAgQ29tbWl0OiBkZmUyODNlOWZkYWMgLSBMaW51 eCA1LjMuOS1yYzEKPiA+ID4gCj4gPiA+IFRoZSByZXN1bHRzIG9mIHRoZXNlIGF1dG9tYXRlZCB0 ZXN0cyBhcmUgcHJvdmlkZWQgYmVsb3cuCj4gPiA+IAo+ID4gPiAgICAgT3ZlcmFsbCByZXN1bHQ6 IEZBSUxFRCAoc2VlIGRldGFpbHMgYmVsb3cpCj4gPiA+ICAgICAgICAgICAgICBNZXJnZTogT0sK PiA+ID4gICAgICAgICAgICBDb21waWxlOiBPSwo+ID4gPiAgICAgICAgICAgICAgVGVzdHM6IEZB SUxFRAo+ID4gPiAKPiA+ID4gQWxsIGtlcm5lbCBiaW5hcmllcywgY29uZmlnIGZpbGVzLCBhbmQg bG9ncyBhcmUgYXZhaWxhYmxlIGZvciBkb3dubG9hZAo+ID4gPiBoZXJlOgo+ID4gPiAKPiA+ID4g ICBodHRwczovL2FydGlmYWN0cy5ja2ktcHJvamVjdC5vcmcvcGlwZWxpbmVzLzI2MjM4MAo+ID4g PiAKPiA+ID4gT25lIG9yIG1vcmUga2VybmVsIHRlc3RzIGZhaWxlZDoKPiA+ID4gCj4gPiA+ICAg ICB4ODZfNjQ6Cj4gPiA+ICAgICAg4p2MIExUUCBsaXRlCj4gPiA+Cj4gPiAKPiA+IE5vdCBhIDUu MyAtc3RhYmxlIHJlZ3Jlc3Npb24uCj4gPiAKPiA+IEZhaWx1cmUgY29tZXMgZnJvbSB0ZXN0IHRo YXQgc2FuaXR5IGNoZWNrcyBhbGwgL3Byb2MgZmlsZXMgYnkgZG9pbmcKPiA+IDFrIHJlYWQgZnJv bSBlYWNoLiBUaGVyZSBhcmUgY291cGxlIGlzc3VlcyBpdCBoaXRzIHdydC4gc25kX2hkYV8qLgo+ ID4gCj4gPiBFeGFtcGxlIHJlcHJvZHVjZXI6Cj4gPiAgIGRkIGlmPS9zeXMva2VybmVsL2RlYnVn L3JlZ21hcC9oZGF1ZGlvQzBEMy1oZGF1ZGlvL2FjY2VzcyBvZj1vdXQudHh0Cj4gPiAgIGNvdW50 PTEgYnM9MTAyNCBpZmxhZz1ub25ibG9jawo+IAo+IFRoYXQncyBub3QgYSBwcm9jIGZpbGUgOikK ClJpZ2h0LiBJdCdzIHNhbWUgdGVzdCB0aGF0J3MgdXNlZCBmb3IgL3Byb2MgdG9vLgoKPiAKPiA+ IEl0J3Mgc2xvdyBhbmQgdHJpZ2dlcnMgc29mdCBsb2NrdXBzIFsxXS4gQW5kIGl0IGFsc28gcmVx dWlyZXMgbG90Cj4gPiBvZiBtZW1vcnksIHRyaWdnZXJpbmcgT09NcyBvbiBzbWFsbGVyIFZNczoK PiA+IDB4MDAwMDAwMDAyNGYwNDM3Yi0weDAwMDAwMDAwMWEzMmIxYzggMTA3Mzc0NTkyMCBzZXFf cmVhZCsweDEzMS8weDQwMAo+ID4gcGFnZXM9MjYyMTQ0IHZtYWxsb2MgdnBhZ2VzIE4wPTI2MjE0 NAo+ID4gCj4gPiBJJ20gbGVhbmluZyB0b3dhcmRzIHNraXBwaW5nIGFsbCByZWdtYXAgZW50cmll cyBpbiB0aGlzIHRlc3QuCj4gPiBDb21tZW50cyBhcmUgd2VsY29tZWQuCj4gCj4gUmFuZG9tbHkg cG9raW5nIGFyb3VuZCBpbiBkZWJ1Z2ZzIGlzIGEgc3VyZSB3YXkgdG8gY2F1c2UgY3Jhc2hlcyBh bmQKPiBtYWpvciBwcm9ibGVtcy4gIEFsc28sIGRlYnVnZnMgZmlsZXMgYXJlIE5PVCBzdGFibGUg YW5kIG9ubHkgZm9yCj4gZGVidWdnaW5nIGFuZCBzaG91bGQgbmV2ZXIgYmUgZW5hYmxlZCBvbiAi cmVhbCIgc3lzdGVtcy4KPiAKPiBTbyB3aGF0IGV4YWN0bHkgaXMgdGhlIHRlc3QgdHJ5aW5nIHRv IGRvIGhlcmU/CgpJdCdzICh1bnByaXZpbGVnZWQpIHVzZXIgdHJ5aW5nIHRvIG9wZW4vcmVhZCBh bnl0aGluZyBpdCBjYW4gKC9wcm9jLCAvc3lzKQp0byBzZWUgaWYgdGhhdCB0cmlnZ2VycyBhbnl0 aGluZyBiYWQuCgpJdCBjYW4gcnVuIGFzIHByaXZpbGVnZWQgdXNlciB0b28sIHdoaWNoIHdhcyB0 aGUgY2FzZSBhYm92ZS4KClsxXSBodHRwczovL2dpdGh1Yi5jb20vbGludXgtdGVzdC1wcm9qZWN0 L2x0cC9ibG9iL21hc3Rlci90ZXN0Y2FzZXMva2VybmVsL2ZzL3JlYWRfYWxsL3JlYWRfYWxsLmMK Cl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCkFsc2EtZGV2 ZWwgbWFpbGluZyBsaXN0CkFsc2EtZGV2ZWxAYWxzYS1wcm9qZWN0Lm9yZwpodHRwczovL21haWxt YW4uYWxzYS1wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL2Fsc2EtZGV2ZWwK From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jan Stancek Date: Mon, 4 Nov 2019 09:28:10 -0500 (EST) Subject: [LTP] =?utf-8?q?=E2=9D=8C_FAIL=3A_Test_report_for_kernel_5=2E3?= =?utf-8?q?=2E9-rc1-dfe283e=2Ecki_=28stable=29?= In-Reply-To: <20191104135135.GA2162401@kroah.com> References: <2029139028.10333037.1572874551626.JavaMail.zimbra@redhat.com> <20191104135135.GA2162401@kroah.com> Message-ID: <1341418315.10342806.1572877690830.JavaMail.zimbra@redhat.com> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: ltp@lists.linux.it ----- Original Message ----- > On Mon, Nov 04, 2019 at 08:35:51AM -0500, Jan Stancek wrote: > > > > > > ----- Original Message ----- > > > > > > Hello, > > > > > > We ran automated tests on a recent commit from this kernel tree: > > > > > > Kernel repo: > > > git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git > > > Commit: dfe283e9fdac - Linux 5.3.9-rc1 > > > > > > The results of these automated tests are provided below. > > > > > > Overall result: FAILED (see details below) > > > Merge: OK > > > Compile: OK > > > Tests: FAILED > > > > > > All kernel binaries, config files, and logs are available for download > > > here: > > > > > > https://artifacts.cki-project.org/pipelines/262380 > > > > > > One or more kernel tests failed: > > > > > > x86_64: > > > ? LTP lite > > > > > > > Not a 5.3 -stable regression. > > > > Failure comes from test that sanity checks all /proc files by doing > > 1k read from each. There are couple issues it hits wrt. snd_hda_*. > > > > Example reproducer: > > dd if=/sys/kernel/debug/regmap/hdaudioC0D3-hdaudio/access of=out.txt > > count=1 bs=1024 iflag=nonblock > > That's not a proc file :) Right. It's same test that's used for /proc too. > > > It's slow and triggers soft lockups [1]. And it also requires lot > > of memory, triggering OOMs on smaller VMs: > > 0x0000000024f0437b-0x000000001a32b1c8 1073745920 seq_read+0x131/0x400 > > pages=262144 vmalloc vpages N0=262144 > > > > I'm leaning towards skipping all regmap entries in this test. > > Comments are welcomed. > > Randomly poking around in debugfs is a sure way to cause crashes and > major problems. Also, debugfs files are NOT stable and only for > debugging and should never be enabled on "real" systems. > > So what exactly is the test trying to do here? It's (unprivileged) user trying to open/read anything it can (/proc, /sys) to see if that triggers anything bad. It can run as privileged user too, which was the case above. [1] https://github.com/linux-test-project/ltp/blob/master/testcases/kernel/fs/read_all/read_all.c 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=-5.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 E58E4CA9EB5 for ; Mon, 4 Nov 2019 14:28:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B93CF217F4 for ; Mon, 4 Nov 2019 14:28:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="aXqHmeYl" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728012AbfKDO2R (ORCPT ); Mon, 4 Nov 2019 09:28:17 -0500 Received: from us-smtp-1.mimecast.com ([205.139.110.61]:49014 "EHLO us-smtp-delivery-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727861AbfKDO2R (ORCPT ); Mon, 4 Nov 2019 09:28:17 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1572877695; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=sXs+LDxO88IFopCBCdlf8Wk3p0+58YbIqWF2eEqPtpk=; b=aXqHmeYlAAY6SZkDL3JDP0xkx/X+LqORa1tdu1R1+X4CGU0x5wW0epXCn+MIGpwoYU5/Ga y97rGrPe8MKyPB/19RNaxuSr4ssV7Td8j+oWdgfpu6+Uw1mD4RSLrswwKoD8MaXY4fMgqC rVdXdgDEi9ngE9c+TzzHYc/HX2KBVWU= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-258-t_2Xk-g9NVCNSG-XGMKtLA-1; Mon, 04 Nov 2019 09:28:12 -0500 Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 85AC48017DD; Mon, 4 Nov 2019 14:28:11 +0000 (UTC) Received: from colo-mx.corp.redhat.com (colo-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.21]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 75D2E5D6C5; Mon, 4 Nov 2019 14:28:11 +0000 (UTC) Received: from zmail17.collab.prod.int.phx2.redhat.com (zmail17.collab.prod.int.phx2.redhat.com [10.5.83.19]) by colo-mx.corp.redhat.com (Postfix) with ESMTP id 13CBF4BB5B; Mon, 4 Nov 2019 14:28:11 +0000 (UTC) Date: Mon, 4 Nov 2019 09:28:10 -0500 (EST) From: Jan Stancek To: Greg KH Cc: CKI Project , Jaroslav Kysela , alsa-devel@alsa-project.org, LTP Mailing List , Linux Stable maillist , Memory Management Message-ID: <1341418315.10342806.1572877690830.JavaMail.zimbra@redhat.com> In-Reply-To: <20191104135135.GA2162401@kroah.com> References: <2029139028.10333037.1572874551626.JavaMail.zimbra@redhat.com> <20191104135135.GA2162401@kroah.com> Subject: =?utf-8?Q?Re:_=E2=9D=8C_FAIL:_Test_report_for_kern?= =?utf-8?Q?el_5.3.9-rc1-dfe283e.cki_(stable)?= MIME-Version: 1.0 X-Originating-IP: [10.43.17.163, 10.4.195.10] Thread-Topic: =?utf-8?B?4p2MIEZBSUw6?= Test report for kernel 5.3.9-rc1-dfe283e.cki (stable) Thread-Index: Kx4pHL9z3NzPO+lMPvoi41zdd+kemg== X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-MC-Unique: t_2Xk-g9NVCNSG-XGMKtLA-1 X-Mimecast-Spam-Score: 0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org ----- Original Message ----- > On Mon, Nov 04, 2019 at 08:35:51AM -0500, Jan Stancek wrote: > >=20 > >=20 > > ----- Original Message ----- > > >=20 > > > Hello, > > >=20 > > > We ran automated tests on a recent commit from this kernel tree: > > >=20 > > > Kernel repo: > > > git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-sta= ble-rc.git > > > Commit: dfe283e9fdac - Linux 5.3.9-rc1 > > >=20 > > > The results of these automated tests are provided below. > > >=20 > > > Overall result: FAILED (see details below) > > > Merge: OK > > > Compile: OK > > > Tests: FAILED > > >=20 > > > All kernel binaries, config files, and logs are available for downloa= d > > > here: > > >=20 > > > https://artifacts.cki-project.org/pipelines/262380 > > >=20 > > > One or more kernel tests failed: > > >=20 > > > x86_64: > > > =E2=9D=8C LTP lite > > > > >=20 > > Not a 5.3 -stable regression. > >=20 > > Failure comes from test that sanity checks all /proc files by doing > > 1k read from each. There are couple issues it hits wrt. snd_hda_*. > >=20 > > Example reproducer: > > dd if=3D/sys/kernel/debug/regmap/hdaudioC0D3-hdaudio/access of=3Dout.= txt > > count=3D1 bs=3D1024 iflag=3Dnonblock >=20 > That's not a proc file :) Right. It's same test that's used for /proc too. >=20 > > It's slow and triggers soft lockups [1]. And it also requires lot > > of memory, triggering OOMs on smaller VMs: > > 0x0000000024f0437b-0x000000001a32b1c8 1073745920 seq_read+0x131/0x400 > > pages=3D262144 vmalloc vpages N0=3D262144 > >=20 > > I'm leaning towards skipping all regmap entries in this test. > > Comments are welcomed. >=20 > Randomly poking around in debugfs is a sure way to cause crashes and > major problems. Also, debugfs files are NOT stable and only for > debugging and should never be enabled on "real" systems. >=20 > So what exactly is the test trying to do here? It's (unprivileged) user trying to open/read anything it can (/proc, /sys) to see if that triggers anything bad. It can run as privileged user too, which was the case above. [1] https://github.com/linux-test-project/ltp/blob/master/testcases/kernel/= fs/read_all/read_all.c