From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 9826C31ED8A for ; Fri, 20 Feb 2026 09:26:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771579608; cv=none; b=VR5z1JHiI6HUeTrAY4nltfdJuyYpUEoRTOyg0Oeag8bidIlIgYpwgGcYX9Q0cyXtp/ENfxt7dqXIQ7C/3OC1xdTqqCXhAQQ3BPftH8OKH1fnQFl6nAUFyPFYc4qch+lUzGIjUI9M+UMSlbvEQIZbl/NjBdVonMinVG4RhuHxwtg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771579608; c=relaxed/simple; bh=rygYI7+8qhKnEA8LHE/5Nlcv73/INmfqVE7fd9OwXCs=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=gnYPM259OpawETih+eOdCSC3/alLWXIqVi8DyHAlnIG4BDq/bfRItp03c3HUnuLPJKOMjwbto+WpizHXil46gyaiq050K8ggOYSeUeDGd+m3xCD0k67S8FWplanpzexCUg3q6fzZKbwgMjhIkfo7CxLjFvoDkbjru7LJgzSWOt0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=pEaP0gXf; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="pEaP0gXf" Received: by smtp.kernel.org (Postfix) with ESMTPS id 3450BC116C6 for ; Fri, 20 Feb 2026 09:26:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1771579608; bh=rygYI7+8qhKnEA8LHE/5Nlcv73/INmfqVE7fd9OwXCs=; h=From:To:Subject:Date:In-Reply-To:References:From; b=pEaP0gXfNL55BjtyiyW6CCNbvb2FivtSjMV6KuQmgLs66q9t+WII9nxSvO0sUBQyc 69lkTSUu9kjlh6WKz+fR4ro+qnJ2JmIktORDRJKz8M3F7vkmGXaQwuhU/+FZBVzaDe LQgiociLgh5oQbq16MFBAIzXH1kOIdC4H0aMi5eAUBsyagGg1l8qIoki1QWpADTvPn XyGwK0s/9A8Tgb86JaWqMdMh35VGNC2xLwtbIcItHeyvk6jgRGzYiNkEIrThAVye2o pwFYh0x0fvZLfit3NC7ATN2mevifHfu9Kn8YIfwK5w2km1ck0hPMlBYaOHqRsa16tT 3G6R65AEdwArg== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 28068CAB780; Fri, 20 Feb 2026 09:26:48 +0000 (UTC) From: bugzilla-daemon@kernel.org To: linux-usb@vger.kernel.org Subject: [Bug 221103] xhci_hcd: System lockup under CPU load during usbfs polling of USB devices on AMD platforms Date: Fri, 20 Feb 2026 09:26:47 +0000 X-Bugzilla-Reason: None X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: AssignedTo drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Product: Drivers X-Bugzilla-Component: USB X-Bugzilla-Version: 2.5 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: paul@unnservice.com X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: drivers_usb@kernel-bugs.kernel.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugzilla.kernel.org/ Auto-Submitted: auto-generated Precedence: bulk X-Mailing-List: linux-usb@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 https://bugzilla.kernel.org/show_bug.cgi?id=3D221103 --- Comment #6 from Paul Alesius (paul@unnservice.com) --- > Works just fine for me here, perhaps this is a bug in your USB device (or hub) that can not handle USB config requests? I don't know. It seems to be related to boards with X670 or X870 chipset and Ryzen/Threadripper. From what I can gather from ADB report comments: Asus Strix X670E-F Gaming BIOS 3402 Asus PRIME X670E-PRO WIFI Asus ProArt X870-E (My board) Dell Precision 7875=20 But since it triggers so reliably on that specific root hub on my machine, = it made me suspect that it's in the kernel. The machine has been restarted many times and it's still while opening that specific root hub, which I think are created by the XHCI_hcd if I'm not mistaken. > Does your system still crash if you remove the ioctl() and simply open and > close the usbfs file? I will try removing the ioctl now Thank you --=20 You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.=