From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 51BD023AB98 for ; Fri, 12 Dec 2025 18:55:18 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765565720; cv=none; b=uOSRmr1yQl0J81RzZX03zn0OMlACS23Ro96+kju+1KECFoL6YyVfHd3/pcoZy5zIvH9Xu/LMNU1n+dY4QUs+6apmHQ6/ESLzdu0oxzuTdUgAsyrm3sREeFlagwFtkUTd8A1he2nSwshBHgzlba/y7Qoigdv5a6bORWfh7OeWtKU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1765565720; c=relaxed/simple; bh=nxBlyNblFTYv9SNk89jQOQjGPKNT1AbR0B1WMUXJlDo=; h=Message-ID:Date:MIME-Version:To:Cc:From:Subject:Content-Type; b=GQUenlYCwiACuHJ4MGcnlOxA5Q7SfuUKeC+d2ojPHz1jANGITIWDAFbe9d45ZNFBxq6DybFUgInZaULcyt7EOVzwNhnqDGOQ+ebOu7MXnJGwckNKyz2osBPvOrzI2H2Nb6gfu6JGXjKOQzBCcwO9vuYUfV2YL4iaBGbTUzer86U= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=DfUU25JN; dkim=pass (2048-bit key) header.d=redhat.com header.i=@redhat.com header.b=Gx45hoYL; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="DfUU25JN"; dkim=pass (2048-bit key) header.d=redhat.com header.i=@redhat.com header.b="Gx45hoYL" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1765565717; 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; bh=K8io9i030xcy4jqmYiAQsEEB2LnqGwu58XdwMhPZrkA=; b=DfUU25JNswqvS7+cPDmQAwOA/b45N2YTGaPNGib+n3vrRP9JotOowRSrD3cLwVKZ+Cj4/y 4auDjob2e7NqK62GprTwVJn/0Jhd7x/rm5e5WMCWtHb1ZPkAMfF9mDxm9/dZAMZDfjHWpX jk+lKUeW65+FgJIWQctBBcY5uP1Cq6w= Received: from mail-wm1-f70.google.com (mail-wm1-f70.google.com [209.85.128.70]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-133-ocqE88ejNzS9ekKmUXudRQ-1; Fri, 12 Dec 2025 13:55:15 -0500 X-MC-Unique: ocqE88ejNzS9ekKmUXudRQ-1 X-Mimecast-MFC-AGG-ID: ocqE88ejNzS9ekKmUXudRQ_1765565714 Received: by mail-wm1-f70.google.com with SMTP id 5b1f17b1804b1-477939321e6so10298325e9.0 for ; Fri, 12 Dec 2025 10:55:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=google; t=1765565714; x=1766170514; darn=vger.kernel.org; h=content-transfer-encoding:organization:subject:from:cc:to :content-language:user-agent:mime-version:date:message-id:from:to:cc :subject:date:message-id:reply-to; bh=K8io9i030xcy4jqmYiAQsEEB2LnqGwu58XdwMhPZrkA=; b=Gx45hoYL/31GyPw3J67HkE63Ss6JySeGQfUjfryJOsuIZfcofJN32GgC8th9V9GBs2 kkk/1Qx7iEQBS+JmtXUmE7zV8ZolDRuuvwd8vpTY+ekz+4xZrZCgHoQGe1kO+SgSGTZO tGV8oMgUswCHfGsMPsM2WNl/hL8jn7/0m8bZbMP63s74K7v31CxSOlvOmwRhboI8SM74 /zHJED4W06+E2leeXu1tKVdMVQ/hO++YlRjal/eu1CAVWIpqolr/yVQDi6kJE9pCVRIV MX//AvZKdgqSSwlLx6FlAQiowndSpskGSpJa4GNFl7qx4bSdbl/gwcyfELOwB9KU4cHF v4Og== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1765565714; x=1766170514; h=content-transfer-encoding:organization:subject:from:cc:to :content-language:user-agent:mime-version:date:message-id:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=K8io9i030xcy4jqmYiAQsEEB2LnqGwu58XdwMhPZrkA=; b=Nv2M/lRzVUmbuBfxHJ8c9XH3SNJNM3v1jMdvbS58qwdA6MMP9w6l6+gxBMUGzCgeM9 NrBO0+qMNh5CPHxwGIEVhT5aJIqWPVv1IihyvDuja7aqhuZCUemDbtdP319szzneNbOp P8w0wdjZ/o7/eafLfdbnNeQwS5Y6JOlwMRK8OigUmaLC+syKWDXj7nkSx08TKWpGtmsd 4lKr6r+AEdtI+uew5aIzoofL7Ym3TkV0vgDZMRiBc3zWOuJEBlsc+kWtKr0ppL0Vw5lZ 6gxSjUY5idRXNZk6RDCgz18Lbjy848E/aXCPkn+4v0k/jauwFQCEEiXfnlHqCETGDR2o Punw== X-Gm-Message-State: AOJu0YzmjywaMT4xAz70GSzF3IYHWOTf+4Hru9FFmDqZHdWe/kpXKht6 8EgfM4DkG7N6v0lZ+qHvL2TV+viq+sQeTR787Dvhwgqkc/dgT7Rvz8jUnQ2IOYLroPgoLudlHFO Y5Z8M12Jv3Mqt2JNVv3otA4XqODpYbr1rQWORRvDQEbdNbIbGLKjdzC+EN+d1tinMFwPAzswbhw == X-Gm-Gg: AY/fxX5wQDnOsgRym3tQxNYY3gLRIRmVvBeOP/9EUoCgWaP7ubtezH8MFZ9BedoQvlr QGegW1v/15NjXpXWA3aj1bkMJMCNGfHGcT7ns0vuoJAP/v2Of4cCNPiR0TN1Z3xl40mlru5d+Dr i3aNi/SfNdMs6VHvcRihw8Bcwy1RIw9WwMpJTLor6LhNbX/dUJcDoGba56pVD41XeJughv4Rp6e jc1mOXFIbMf3taA4bE4c9+Ii3/BuojaF4IxyTWGb5oGeid57XrSUbnZtzYT/OpkwtnE3/mjKJ3C PkZBt3OUf6zRhY3BDolBGJXIRVubz/cMmSktm2iFK9m2X82ecN7QH93mcQ/TcRtpRL5avONegfm dZL6HSYYzTF1L8w== X-Received: by 2002:a05:600c:3f10:b0:477:9a28:b0a4 with SMTP id 5b1f17b1804b1-47a8f710100mr32269115e9.0.1765565714023; Fri, 12 Dec 2025 10:55:14 -0800 (PST) X-Google-Smtp-Source: AGHT+IHeiIQzW/DuL2Bl233Hm8ZLPpOs9fsy7KUiXBLD4G3IAM6yRYtgdqmQZA4fhn56rlDCEzJmMg== X-Received: by 2002:a05:600c:3f10:b0:477:9a28:b0a4 with SMTP id 5b1f17b1804b1-47a8f710100mr32268975e9.0.1765565713580; Fri, 12 Dec 2025 10:55:13 -0800 (PST) Received: from [192.168.0.111] ([212.20.115.16]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-42fa8b8a97esm16406174f8f.31.2025.12.12.10.55.13 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 12 Dec 2025 10:55:13 -0800 (PST) Message-ID: <072774ed-cb7b-4700-821b-b2c743b37222@redhat.com> Date: Fri, 12 Dec 2025 19:55:12 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Beta Content-Language: en-US, cs To: imre.deak@intel.com Cc: LKML From: Zdenek Kabelac Subject: UBSAN: shift-out-of-bounds in drivers/gpu/drm/display/drm_dp_mst_topology.c:4575:36 Organization: RedHat Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Hi I've noticed this in my message log while suspending my P1 machine (and unplugging it from my docking station). ---- kernel: UBSAN: shift-out-of-bounds in drivers/gpu/drm/display/drm_dp_mst_topology.c:4575:36 kernel: shift exponent -1 is negative kernel: CPU: 12 UID: 0 PID: 2972 Comm: Xorg Not tainted 6.18.0-0.rc7.58.fc44.x86_64 #1 PREEMPT(lazy) kernel: Hardware name: LENOVO 21FFS02H22/21FFS02H22, BIOS N3VET59W (1.59 ) 05/13/2025 kernel: Call Trace: kernel: kernel: dump_stack_lvl+0x5d/0x80 kernel: ubsan_epilogue+0x5/0x2b kernel: __ubsan_handle_shift_out_of_bounds.cold+0xd7/0x1ab kernel: drm_dp_atomic_release_time_slots.cold+0x1c/0x90 [drm_display_helper] kernel: drm_atomic_helper_check_modeset+0x2a9/0x690 pipewire-media-session[3089]: ms.mod.default-profile: device 'alsa_card.pci-0000_c4_00.1': can't restore profile: No such device kernel: amdgpu_dm_atomic_check+0x64/0x1570 [amdgpu] kernel: drm_atomic_check_only+0x180/0x3e0 kernel: ? __pfx_drm_mode_setcrtc+0x10/0x10 kernel: drm_atomic_commit+0x71/0xe0 kernel: ? __pfx___drm_printfn_info+0x10/0x10 kernel: drm_atomic_helper_set_config+0x7a/0xd0 kernel: drm_mode_setcrtc+0x37a/0x900 kernel: ? __wait_for_common+0x162/0x190 kernel: ? __pfx_drm_mode_setcrtc+0x10/0x10 kernel: drm_ioctl_kernel+0xae/0x100 kernel: drm_ioctl+0x2a8/0x550 kernel: ? __pfx_drm_mode_setcrtc+0x10/0x10 kernel: amdgpu_drm_ioctl+0x4a/0x90 [amdgpu] kernel: __x64_sys_ioctl+0x97/0xe0 kernel: do_syscall_64+0x7e/0x7f0 kernel: ? __check_object_size.part.0+0x34/0xc0 kernel: ? drm_ioctl+0x2dd/0x550 kernel: ? __pfx_drm_mode_setcrtc+0x10/0x10 kernel: ? ktime_get_mono_fast_ns+0x35/0xe0 kernel: ? amdgpu_drm_ioctl+0x7b/0x90 [amdgpu] kernel: ? syscall_exit_work+0x143/0x1b0 kernel: ? do_syscall_64+0xb6/0x7f0 kernel: ? do_syscall_64+0xb6/0x7f0 kernel: ? sched_clock+0x10/0x30 kernel: ? sched_clock_cpu+0xb/0x30 kernel: ? irqtime_account_irq+0x3c/0xc0 kernel: ? irqentry_exit_to_user_mode+0x2c/0x1c0 kernel: entry_SYSCALL_64_after_hwframe+0x76/0x7e kernel: RIP: 0033:0x7f1280c2444d kernel: Code: 04 25 28 00 00 00 48 89 45 c8 31 c0 48 8d 45 10 c7 45 b0 10 00 00 00 48 89 45 b8 48 8d 45 d0 48 89 45 c0 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1a 48 8b 45 c8 64 48 2b 04 25 28 00 00 00 kernel: RSP: 002b:00007ffc601c14d0 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 kernel: RAX: ffffffffffffffda RBX: 000000001bc87f60 RCX: 00007f1280c2444d kernel: RDX: 00007ffc601c1560 RSI: 00000000c06864a2 RDI: 000000000000000d kernel: RBP: 00007ffc601c1520 R08: 0000000000000000 R09: 0000000000000000 kernel: R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc601c1560 kernel: R13: 00000000c06864a2 R14: 000000000000000d R15: 0000000000000000 kernel: kernel: ---[ end trace ]--- boltd[1177]: probing: timeout, done: [2636501] (2000000) kernel: Lockdown: systemd-logind: hibernation is restricted; see man kernel_lockdown.7 kernel: Lockdown: systemd-logind: hibernation is restricted; see man kernel_lockdown.7 systemd-logind[1183]: The system will suspend now! ----- I'd have guess it didn't liked maybe unplug of cable - however the problem was later on after resume - where the machine looked 'very slow' - first I've suspected the latest version of Firefox got somehow slow - but after clean reboot everything started to work fine & fast again. But so far I don't see anything else suspicious in my system log to give some hints why later on my Xorg session was running so slowly. My laptop: ThinkPad P16v Gen 1, 64G RAM, 16 AMD Cores Regards Zdenek