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 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3998CC0218E for ; Sun, 26 Jan 2025 15:55:19 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C895210E061; Sun, 26 Jan 2025 15:55:18 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=ibm.com header.i=@ibm.com header.b="p18vDsCi"; dkim-atps=neutral Received: from mx0b-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8356010E05D; Sun, 26 Jan 2025 15:55:17 +0000 (UTC) Received: from pps.filterd (m0356516.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 50QFe5OT025921; Sun, 26 Jan 2025 15:55:14 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-type:date:from:in-reply-to:message-id:mime-version :references:subject:to; s=pp1; bh=0ExQz2LGkzGQ4zgyv7oTbKecX70H/y grKaGz4l2lz18=; b=p18vDsCiopjSKUwVGTopaeu6/RgrvpRBfugPpfEV81fyYw F+BMARTFwhlrnCQ0hxIkOhdpF0JRGxMGsNRo4DkjgG0nrGw0oiPmw0b8IhRCxSvl SKztuwD+0B8ZRlSO3XbznrtfwdUUcUuvcw+KEN1+XDw4f9RKGEzrgByhlGVTUTXL UwrgSmFDXaK+WxIwAL0YS5NnehOv0XXX3n/QaJGXW35few3MzUmCaz3p3JOxJutV TkHUpRikTh9Q/birv7SQGSyq2aMxd8sXkR7chR9j1fn/RWmWAHqdlVChVVkx71dl mpaiJ72RMY+Qd21y23N1Vnt3WeRIolFHljs37MSw== Received: from ppma13.dal12v.mail.ibm.com (dd.9e.1632.ip4.static.sl-reverse.com [50.22.158.221]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 44dqvt01k1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sun, 26 Jan 2025 15:55:14 +0000 (GMT) Received: from pps.filterd (ppma13.dal12v.mail.ibm.com [127.0.0.1]) by ppma13.dal12v.mail.ibm.com (8.18.1.2/8.18.1.2) with ESMTP id 50QCwEF7022538; Sun, 26 Jan 2025 15:55:13 GMT Received: from smtprelay06.fra02v.mail.ibm.com ([9.218.2.230]) by ppma13.dal12v.mail.ibm.com (PPS) with ESMTPS id 44dcgja93x-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sun, 26 Jan 2025 15:55:13 +0000 Received: from smtpav01.fra02v.mail.ibm.com (smtpav01.fra02v.mail.ibm.com [10.20.54.100]) by smtprelay06.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 50QFtCr123200010 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 26 Jan 2025 15:55:12 GMT Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E756120090; Sun, 26 Jan 2025 15:55:01 +0000 (GMT) Received: from smtpav01.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id C6B442008E; Sun, 26 Jan 2025 15:55:01 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by smtpav01.fra02v.mail.ibm.com (Postfix) with ESMTPS; Sun, 26 Jan 2025 15:55:01 +0000 (GMT) Date: Sun, 26 Jan 2025 16:54:55 +0100 From: Alexander Gordeev To: Al Viro Cc: "Borah, Chaitanya Kumar" , "intel-gfx@lists.freedesktop.org" , "intel-xe@lists.freedesktop.org" , "Kurmi, Suresh Kumar" , "Saarinen, Jani" , "linux-fsdevel@vger.kernel.org" Subject: Re: Regression on linux-next (next-20250120) Message-ID: References: <20250123181853.GC1977892@ZenIV> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250123181853.GC1977892@ZenIV> X-TM-AS-GCONF: 00 X-Proofpoint-ORIG-GUID: J8jsyB_zQXgvmfCIN9qlOQBZY2rDRS7- X-Proofpoint-GUID: J8jsyB_zQXgvmfCIN9qlOQBZY2rDRS7- X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1057,Hydra:6.0.680,FMLib:17.12.68.34 definitions=2025-01-26_06,2025-01-23_01,2024-11-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 lowpriorityscore=0 adultscore=0 bulkscore=0 phishscore=0 impostorscore=0 spamscore=0 clxscore=1011 malwarescore=0 mlxlogscore=999 priorityscore=1501 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2411120000 definitions=main-2501260125 X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" On Thu, Jan 23, 2025 at 06:18:53PM +0000, Al Viro wrote: Hi Al, > On Thu, Jan 23, 2025 at 03:41:08PM +0000, Borah, Chaitanya Kumar wrote: > > Hello Al, > > > > Hope you are doing well. I am Chaitanya from the linux graphics team in Intel. > > > > This mail is regarding a regression we are seeing in our CI runs[1] on linux-next repository. > > > > Since the version next-20250120 [2], we are seeing the following regression > > Ugh... To narrow the things down, could you see if replacing > fsd = kmalloc(sizeof(*fsd), GFP_KERNEL); > with > fsd = kzalloc(sizeof(*fsd), GFP_KERNEL); > in fs/debugfs/file.c:__debugfs_file_get() affects the test? This change fixes lots of the below failures in our CI. FWIW: Tested-by: Alexander Gordeev Unable to handle kernel pointer dereference in virtual kernel address space Failing address: 0000000000000000 TEID: 0000000000000000 Fault in primary space mode while using kernel ASCE. AS:0000000243668007 R3:00000003fee58007 S:00000003fee57801 P:000000000000013d Oops: 0004 ilc:1 [#1] SMP Modules linked in: binfmt_misc mlx5_ib ib_uverbs ib_core dm_service_time nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nf_tables mlx5_core pkey_pckmo uvdevice s390_trng rng_core eadm_sch vfio_ccw mdev vfio_iommu_type1 vfio sch_fq_codel drm i2c_core loop dm_multipath drm_panel_orientation_quirks configfs nfnetlink lcs ctcm fsm zfcp scsi_transport_fc hmac_s390 ghash_s390 prng chacha_s390 libchacha aes_s390 des_s390 libdes sha3_512_s390 sha3_256_s390 sha512_s390 sha256_s390 sha1_s390 sha_common scsi_dh_rdac scsi_dh_emc scsi_dh_alua pkey autofs4 ecdsa_generic ecc CPU: 3 UID: 0 PID: 19223 Comm: dump2tar Not tainted 6.14.0-20250123.rc0.git129.853d1f41ba73.300.fc41.s390x+next #1 Hardware name: IBM 9175 ME1 701 (LPAR) Krnl PSW : 0704e00180000000 0000000000000000 (0x0) R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:2 PM:0 RI:0 EA:3 Krnl GPRS: 0000000000000003 0000029253f7f100 00000000a9fa0600 000003ff84472010 0000000000080000 00000212db803e68 00000212db803e68 0000000000080000 00000000cf33c6c0 00000000be6d6a00 00000000a9fa0600 0000000000000000 000003ff909acfa0 000003ff84472010 00000292d425da96 00000212db803c98 Krnl Code:>0000000000000000: 0000 illegal 0000000000000002: 0000 illegal 0000000000000004: 0000 illegal 0000000000000006: 0000 illegal 0000000000000008: 0000 illegal 000000000000000a: 0000 illegal 000000000000000c: 0000 illegal 000000000000000e: 0000 illegal Call Trace: [<0000000000000000>] 0x0 ([<000001e12d421b6a>] full_proxy_read+0x4a/0xc0) [<000001e12d18ac16>] vfs_read+0x96/0x340 [<000001e12d18b7b8>] ksys_read+0x78/0x100 [<000001e12cdbf9d6>] do_syscall.constprop.0+0x116/0x140 [<000001e12dba3ff4>] __do_syscall+0xd4/0x1c0 [<000001e12dbaf404>] system_call+0x74/0x98 Thanks!