linux-kernel - [2.6.39] crash in acm_ctrl

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Date:	Sun, 29 May 2011 16:04:02 +0200
From:	Riccardo Magliocchetti <riccardo.magliocchetti@...il.com>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
CC:	Oliver Neukum <oliver@...kum.name>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: [2.6.39] crash in acm_ctrl_msg+0x16/0x59

Hi,

network manager's modemmanager crashed when i've inserted my openmoko 
freerunner while an 3g usb device driven by the option driver was 
already connected.

These are the last bits in messages:

[20462.652083] usb 6-1: new full speed USB device number 4 using uhci_hcd
[20462.836424] usb 6-1: New USB device found, idVendor=1d50, idProduct=5119
[20462.836440] usb 6-1: New USB device strings: Mfr=1, Product=2, 
SerialNumber=3
[20462.836447] usb 6-1: Product: Neo1973 Bootloader U-Boot 
1.3.2-dirty-moko12
[20462.836454] usb 6-1: Manufacturer: OpenMoko, Inc
[20462.836459] usb 6-1: SerialNumber: 0000000
mtp-probe: checking bus 6, device 4: 
"/sys/devices/pci0000:00/0000:00:1d.0/usb6/6-1"
mtp-probe: bus: 6, device: 4 was not an MTP device
[20462.901834] cdc_acm 6-1:1.0: ttyACM0: USB ACM device
[20462.904417] usbcore: registered new interface driver cdc_acm
[20462.904420] cdc_acm: v0.26:USB Abstract Control Model driver for USB 
modems and ISDN adapters
[20463.624142] usb 6-1: USB disconnect, device number 4
[20463.641859] CPU 0

This is the stracktrace:

acm_ctrl_msg+0x16/0x59
mutex_lock+0x13/0x2a
acm_port_down+0x4c/0xcb
acm_tty_close+0x75/0x93
tty_release+0x1b5/0x47c
? compat_do_readv_write+0x199/0x1ae
fput+0xf8/0x1ad
filp_close+0x69/0x75
sys_close+0x8a/0xea
sysenter_dispatch+0x07/0x32

Config attached.

The 3g device is:
Bus 006 Device 002: ID 12d1:1003 Huawei Technologies Co., Ltd. E220 
HSDPA Modem / E230/E270 HSDPA/HSUPA Modem

Thanks,
riccardo

View attachment "config-2.6.39+" of type "text/plain" (77972 bytes)