Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755461AbZGBUw4 (ORCPT ); Thu, 2 Jul 2009 16:52:56 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753522AbZGBUws (ORCPT ); Thu, 2 Jul 2009 16:52:48 -0400 Received: from khc.piap.pl ([195.187.100.11]:38517 "EHLO khc.piap.pl" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753512AbZGBUwr (ORCPT ); Thu, 2 Jul 2009 16:52:47 -0400 To: Subject: 2.6.30 PL2303 USB-serial: NULL ptr dereference From: Krzysztof Halasa Date: Thu, 02 Jul 2009 22:52:48 +0200 Message-ID: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4562 Lines: 92 Hi, Not sure if the following has been reported. I think happened when closing minicom, with the PL2303-based adapter still connected to USB. usb 6-1: new full speed USB device using uhci_hcd and address 2 usb 6-1: configuration #1 chosen from 1 choice usbcore: registered new interface driver usbserial usbserial: USB Serial Driver core USB Serial support registered for pl2303 pl2303 6-1:1.0: pl2303 converter detected usb 6-1: pl2303 converter now attached to ttyUSB0 usbcore: registered new interface driver pl2303 pl2303: Prolific PL2303 USB to serial adaptor driver hub 6-0:1.0: port 1 disabled by hub (EMI?), re-enabling... usb 6-1: USB disconnect, address 2 pl2303 ttyUSB0: pl2303 converter now disconnected from ttyUSB0 pl2303 6-1:1.0: device disconnected usb 6-1: new full speed USB device using uhci_hcd and address 3 usb 6-1: configuration #1 chosen from 1 choice pl2303 6-1:1.0: pl2303 converter detected usb 6-1: pl2303 converter now attached to ttyUSB1 hub 6-0:1.0: port 1 disabled by hub (EMI?), re-enabling... usb 6-1: USB disconnect, address 3 pl2303 ttyUSB1: pl2303 converter now disconnected from ttyUSB1 pl2303 6-1:1.0: device disconnected usb 6-1: new full speed USB device using uhci_hcd and address 4 usb 6-1: configuration #1 chosen from 1 choice pl2303 6-1:1.0: pl2303 converter detected usb 6-1: pl2303 converter now attached to ttyUSB2 Then after two hours, while exiting from minicom (most probably): BUG: unable to handle kernel NULL pointer dereference at (null) IP: [] _spin_lock_irqsave+0x8/0x20 PGD 0 Oops: 0002 [#1] SMP last sysfs file: /sys/devices/pci0000:00/0000:00:1d.0/usb6/6-1/6-1:1.0/ttyUSB2/port_number CPU 1 Modules linked in: pl2303 usbserial radeon drm coretemp f71882fg hwmon binfmt_misc sg snd_hda_codec_realtek pcspkr parport_pc snd_hda_intel parport snd_hda_codec snd_pcm snd_timer r8169 snd soundcore snd_page_alloc [last unloaded: scsi_wait_scan] Pid: 3558, comm: minicom Not tainted 2.6.30 #15 MS-7512 RIP: 0010:[] [] _spin_lock_irqsave+0x8/0x20 RSP: 0018:ffff88013df5dca0 EFLAGS: 00010046 RAX: 0000000000000246 RBX: 0000000000000000 RCX: ffff88013dd51000 RDX: 0000000000010000 RSI: ffff88013e537000 RDI: 0000000000000000 RBP: ffff88013e537000 R08: ffff88013d14a9c0 R09: 0000000000000000 R10: 0000000000000001 R11: ffff88002804a510 R12: ffff88013dd51000 R13: ffff880139dc0180 R14: 0000000000000000 R15: ffffffffa017aaa0 FS: 0000000000000000(0000) GS:ffff88002803a000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000000000000 CR3: 0000000000201000 CR4: 00000000000406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process minicom (pid: 3558, threadinfo ffff88013df5c000, task ffff88013f1bc7d0) Stack: ffffffffa0177c93 ffffffff80231110 0000000000000000 0000000000000000 ffffe20000000002 ffffe2000408cfd8 ffffffff8022d2c0 0000000000080c00 00000001806c6900 0000000000000040 ffff88013e537000 ffff88013dd51000 Call Trace: [] ? pl2303_close+0x33/0x290 [pl2303] [] ? default_wake_function+0x0/0x20 [] ? __wake_up_common+0x50/0x80 [] ? serial_close+0x1e7/0x220 [usbserial] [] ? tty_release_dev+0x162/0x580 [] ? tty_release+0x11/0x20 [] ? __fput+0xc2/0x210 [] ? filp_close+0x56/0x90 [] ? put_files_struct+0x75/0xf0 [] ? do_exit+0x65e/0x6d0 [] ? do_group_exit+0x45/0xb0 [] ? sys_exit_group+0x12/0x20 [] ? system_call_fastpath+0x16/0x1b Code: 00 00 84 d2 75 09 f0 81 07 00 00 00 01 30 c0 f3 c3 66 90 f0 83 2f 01 79 05 e8 f5 3d e7 ff c3 0f 1f 40 00 9c 58 fa ba 00 00 01 00 0f c1 17 0f b7 ca c1 ea 10 39 d1 74 07 f3 90 0f b7 0f eb f5 RIP [] _spin_lock_irqsave+0x8/0x20 RSP CR2: 0000000000000000 ---[ end trace 3989c95d46ef42fc ]--- Fixing recursive fault but reboot is needed! Few hours later: usb 6-1: USB disconnect, address 4 pl2303 ttyUSB2: pl2303 converter now disconnected from ttyUSB2 pl2303 6-1:1.0: device disconnected Additional details available on request. -- Krzysztof Halasa -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/