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 9D11831BC8D for ; Fri, 20 Feb 2026 09:24:04 +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=1771579444; cv=none; b=uEMtIiP0OCzu1IVgsfPx3eWMf4cuoVfo++KfwtRxdar9e1fRvcZC+3GHRYzGSPJRguOFFeeYwgykbi2wBriIg3mvWzrtT1ppGtyKvgxL3UfLlO0XvRlU7+TcLlB4g/ez3DqN+dtX6E7Wns0NBaTFunY3Oqz9hjg7YtOEQZpKGDY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1771579444; c=relaxed/simple; bh=V37mKVK7eyc/2tTF5yNO+Evv+jzEHYsC8sN0b6YBhSk=; h=From:To:Subject:Date:Message-ID:In-Reply-To:References: Content-Type:MIME-Version; b=SCC7DzbSV6dIdG4pLxx62bYn0vrA8odTLwI8yjeEo8XgVcsakhGOwhPyx9gHHcC26A7ZmwyUwyBtDwGqdHp/iAhasAuNnyEFmO4GnNXiJ2luq++gTJsNz7FpFOBRunmYGdRmuFlmA9MakTZY2QBHNA6M1NDmzfQwB4Xzm9xaiF0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=YHsj6d4A; 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="YHsj6d4A" Received: by smtp.kernel.org (Postfix) with ESMTPS id 38FBCC19425 for ; Fri, 20 Feb 2026 09:24:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1771579444; bh=V37mKVK7eyc/2tTF5yNO+Evv+jzEHYsC8sN0b6YBhSk=; h=From:To:Subject:Date:In-Reply-To:References:From; b=YHsj6d4AoKfDwNLKtoUWqf8T0lDhVtAsFJgx2fPgUn6ijvBF+TQgzA79q+qpferLq OPuTjgfWyPtSiov3/ekD8kUdRa4wTmaUbYTeAtbxwgNf6eN9Q65boXY0IZdTxspWTf c85H3DcXxdIHqczTlqh+7uZX72H4pVV0XUHFT2D1oGkL3AkoA6noOVsb/yA7MDajN6 v7cJgTEkvNPdnaPwSIHFdEXutT+dzBafrCsKWYv8VUJNHGKHZm6SPamcIFLerJiOqG rvNXI1/FYeafemXgLt61Lod+d6Am4dVwgoQ9YnVnNUJ07ha+DC/aaBC/5feKjEHHmS LqwRbE0VOsGhg== Received: by aws-us-west-2-korg-bugzilla-1.web.codeaurora.org (Postfix, from userid 48) id 231B7C3279F; Fri, 20 Feb 2026 09:24:04 +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 09:24:03 +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: michal.pecio@gmail.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 #5 from Micha=C5=82 Pecio (michal.pecio@gmail.com) --- Actually, it may still be a problem with xhci_hcd because I found that simp= ly opening the USBFS file causes some xhci_hcd debug logs. But this ioctl() looks like meaningless noise, the way you call it it's alw= ays supposed to fail, either with or without root. Does your system still crash if you remove the ioctl() and simply open and close the usbfs file? --=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.=