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 03F8F33C1A3 for ; Fri, 20 Feb 2026 10:17:52 +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=1771582673; cv=none; b=m4g69CgKEO5rot979E6gMBM4B1Ed3hrtIQp53p6kAnJmmX7VU+d8ud3e4fzL3M/2wkMQGntareznnOxjnVrizOg8nAqvDmo+GQ9aCybilvB5hMuIDl3HYvPQHpY+dj6fvGGIQTZDyyhG6Bsy2uON/FH8RCmf8XmQjlEgUSXNTUE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771582673; c=relaxed/simple; bh=7GgnIMn4oBHh+5wA6jo7tEdqt89i9LNrqqKpCGV4ors=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=IcoiETwrTaekP4jCiZeozKS6wekEmXU/G37r4TSyshbCrC/2KUXntLY1jCsPE05SAcv82L7vuAOVj2KS8Q/5NOqBWeajEHGSht0lN6+krmbLVes6+wxcnzVFdbvkfVG498yvimkRTrildSHLmGAwuSCaGi5OGljOJRnQpYQpwJA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=AWaBSr5e; 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="AWaBSr5e" Received: by smtp.kernel.org (Postfix) with ESMTPS id 95310C116D0 for ; Fri, 20 Feb 2026 10:17:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1771582672; bh=7GgnIMn4oBHh+5wA6jo7tEdqt89i9LNrqqKpCGV4ors=; h=From:To:Subject:Date:In-Reply-To:References:From; b=AWaBSr5eEyaYbDb9+AuAZsqjKcE0CWf51kRFbDG19hEMWEci/M5Jtuf1vXsUzDIhb XRVLj99GpB+zRFaGrzS8EE3bCijW3Ufp80ZBGEYl/sC14LZC8y2AMvic5KVQTSatdO /GjC0bg2LtYBc/nL8dxkzVFWwi5dB8hyCTgTl5I3kktzxdW8HKf3B0N3QZDfspWl/k WMWyJeGff3F38djwoUTLkDbx5KvIuugSWgn7zCYRZ9M8rACn087bz2eyRtJ3h0lNKi knr3RVnVQXV1vwNStoU9694Gc5cpJUwVS5XshVA3AMnNZCDmH/xmZ50HhdXl4PZman IrH2x2saC1Jug== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 7EE6BCAB781; Fri, 20 Feb 2026 10:17:52 +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 10:17:52 +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: greg@kroah.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 #10 from Greg Kroah-Hartman (greg@kroah.com) --- On Fri, Feb 20, 2026 at 10:07:57AM +0000, bugzilla-daemon@kernel.org wrote: > https://bugzilla.kernel.org/show_bug.cgi?id=3D221103 >=20 > --- Comment #9 from Paul Alesius (paul@unnservice.com) --- > > Or perhaps simply this would crash it? > > while sleep .1 ; do true =20 > Yes it froze the system on iteration 3000 >=20 > A C program without ioctl also froze it on iteration 887. Doing ioctl see= ms > to > trigger it much faster at iteration ~200. >=20 > I ordered a USB-to-ethernet adapter in the meantime to try to get more > diagnostics through netconsole, instead of serial cable, will that work? If the USB stack is locking up, dumping USB data out when that happens would obviously not be possible :) There is a special USB debug cable that will work instead, search around on the web for one if you are curious about using it. good luck! greg k-h --=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.=