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38237fd2be
linux/drivers/usb/serial
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Jiri Slaby 38237fd2be USB: serial/usb_wwan, fix tty NULL dereference 
tty_port_tty_get may return without any problems NULL. Handle this
case and do not oops in usb_wwan_indat_callback by dereferencing it.

The oops:
Unable to handle kernel paging request for data at address 0x000000d8
Faulting instruction address: 0xc0175b3c
Oops: Kernel access of bad area, sig: 11 [#1]
PowerPC 40x Platform
last sysfs file:
/sys/devices/pci0000:00/0000:00:00.0/0000:01:00.0/0000:02:09.2/usb1/idVendor
Modules linked in:
NIP: c0175b3c LR: c0175e7c CTR: c0215c90
REGS: c77f7d50 TRAP: 0300   Not tainted  (2.6.37-rc5)
MSR: 00021030 <ME,CE,IR,DR>  CR: 88482028  XER: 2000005f
DEAR: 000000d8, ESR: 00000000
TASK = c7141b90[1149] 'wvdial' THREAD: c2750000
GPR00: 00021030 c77f7e00 c7141b90 00000000 0000000e 00000000 0000000e c0410680
GPR08: c683db00 00000000 00000001 c03c81f8 88482028 10073ef4 ffffffb9 ffffff94
GPR16: 00000000 fde036c0 00200200 00100100 00000001 ffffff8d c34fabcc 00000000
GPR24: c71120d4 00000000 00000000 0000000e 00021030 00000000 00000000 0000000e
NIP [c0175b3c] tty_buffer_request_room+0x2c/0x194
LR [c0175e7c] tty_insert_flip_string_fixed_flag+0x3c/0xb0
Call Trace:
[c77f7e00] [00000003] 0x3 (unreliable)
[c77f7e30] [c0175e7c] tty_insert_flip_string_fixed_flag+0x3c/0xb0
[c77f7e60] [c0215df4] usb_wwan_indat_callback+0x164/0x170
...

References: https://bugzilla.kernel.org/show_bug.cgi?id=24582
Cc: Amit Shah <amitshah@gmx.net>
Cc: baoyb <baoyb@avit.org.cn>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: stable <stable@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2011-02-17 10:30:25 -08:00
..
aircable.c USB: aircable: fix incorrect write-buffer length 2010-05-20 13:21:49 -07:00
ark3116.c tty: Convert the USB drivers to the new icount interface 2010-10-22 10:20:04 -07:00
belkin_sa.c USB: belkin_sa: implement line status handling 2010-05-20 13:21:48 -07:00
belkin_sa.h USB: belkin_sa.h: checkpatch cleanups 2010-05-20 13:21:46 -07:00
bus.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
ch341.c USB: serial: handle Data Carrier Detect changes 2011-01-22 18:53:26 -08:00
ChangeLog.history trivial: Fix misspelling of firmware 2009-03-30 15:21:59 +02:00
console.c usb-console: pass baud from console to the initial tty open 2010-05-20 13:21:32 -07:00
cp210x.c USB: serial: handle Data Carrier Detect changes 2011-01-22 18:53:26 -08:00
cyberjack.c USB: tty: Prune uses of tty_request_room in the USB layer 2010-03-02 14:55:12 -08:00
cypress_m8.c drivers/usb: Remove unnecessary return's from void functions 2010-08-10 14:25:42 +02:00
cypress_m8.h USB: cypress_m8.h: checkpatch cleanups 2010-05-20 13:21:46 -07:00
digi_acceleport.c USB: serial: handle Data Carrier Detect changes 2011-01-22 18:53:26 -08:00
empeg.c USB: empeg: reimplement using generic framework 2010-05-20 13:21:48 -07:00
ezusb_convert.pl
ezusb.c
ftdi_sio_ids.h USB: ftdi_sio: Add VID=0x0647, PID=0x0100 for Acton Research spectrograph 2011-02-03 16:49:42 -08:00
ftdi_sio.c USB: ftdi_sio: Add VID=0x0647, PID=0x0100 for Acton Research spectrograph 2011-02-03 16:49:42 -08:00
ftdi_sio.h USB: ftdi_sio: checkpatch cleanups 2010-05-20 13:21:46 -07:00
funsoft.c USB serial: make USB device id constant 2010-03-02 14:54:16 -08:00
garmin_gps.c drivers/usb: Remove unnecessary return's from void functions 2010-08-10 14:25:42 +02:00
generic.c USB: serial: handle Data Carrier Detect changes 2011-01-22 18:53:26 -08:00
hp4x.c USB serial: make USB device id constant 2010-03-02 14:54:16 -08:00
io_16654.h
io_edgeport.c USB: io_edgeport: fix the reported firmware major and minor 2011-02-03 16:40:58 -08:00
io_edgeport.h USB: io_edgeport: checkpatch cleanups 2010-05-20 13:21:47 -07:00
io_ionsp.h USB: io_edgeport: checkpatch cleanups 2010-05-20 13:21:47 -07:00
io_tables.h USB serial: add missing .usb_driver field in serial drivers 2011-01-22 18:38:59 -08:00
io_ti.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-10-24 13:41:39 -07:00
io_ti.h USB: io_edgeport: checkpatch cleanups 2010-05-20 13:21:47 -07:00
io_usbvend.h USB: io_edgeport: checkpatch cleanups 2010-05-20 13:21:47 -07:00
ipaq.c Revert "USB: Adding support for HTC Smartphones to ipaq" 2010-08-10 14:35:35 -07:00
ipw.c USB: ipw: reimplement using generic framework 2010-05-20 13:21:46 -07:00
ir-usb.c USB: ir-usb: fix incorrect write-buffer length 2010-05-20 13:21:50 -07:00
iuu_phoenix.c USB serial: add missing .usb_driver field in serial drivers 2011-01-22 18:38:59 -08:00
iuu_phoenix.h
Kconfig Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-10-24 13:41:39 -07:00
keyspan_pda.c USB: serial: handle Data Carrier Detect changes 2011-01-22 18:53:26 -08:00
keyspan_usa26msg.h
keyspan_usa28msg.h
keyspan_usa49msg.h
keyspan_usa67msg.h
keyspan_usa90msg.h
keyspan.c Update broken web addresses in the kernel. 2010-10-18 11:03:14 +02:00
keyspan.h USB serial: add missing .usb_driver field in serial drivers 2011-01-22 18:38:59 -08:00
kl5kusb105.c fix typos concerning "initiali[zs]e" 2010-06-16 18:05:05 +02:00
kl5kusb105.h USB: kl5kusb105.h: checkpatch cleanups 2010-05-20 13:21:47 -07:00
kobil_sct.c USB: kobil: fix memory leak 2010-05-20 13:21:47 -07:00
kobil_sct.h USB: kobil_sct.h: checkpatch cleanups 2010-05-20 13:21:47 -07:00
Makefile usb: makefile cleanup 2010-10-22 10:22:07 -07:00
Makefile-keyspan_pda_fw
mct_u232.c USB: mct_u232: fix broken close 2010-10-22 10:22:19 -07:00
mct_u232.h Update broken web addresses in the kernel. 2010-10-18 11:03:14 +02:00
mos7720.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-10-24 13:41:39 -07:00
mos7840.c Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-10-24 13:41:39 -07:00
moto_modem.c USB serial: add missing .usb_driver field in serial drivers 2011-01-22 18:38:59 -08:00
navman.c USB: add device IDs for igotu to navman 2010-08-23 20:50:15 -07:00
omninet.c drivers/usb: Remove unnecessary return's from void functions 2010-08-10 14:25:42 +02:00
opticon.c USB: opticon: Whitespace fixes in opticon driver 2010-10-22 10:22:10 -07:00
option.c USB: adding USB support for Cinterion's HC2x, EU3 and PH8 products 2011-01-22 18:40:21 -08:00
oti6858.c USB serial: add missing .usb_driver field in serial drivers 2011-01-22 18:38:59 -08:00
oti6858.h
pl2303.c USB: serial: handle Data Carrier Detect changes 2011-01-22 18:53:26 -08:00
pl2303.h drivers: update to pl2303 usb-serial to support Motorola cables 2011-01-22 18:44:38 -08:00
qcaux.c USB serial: add missing .usb_driver field in serial drivers 2011-01-22 18:38:59 -08:00
qcserial.c USB: qcserial: Enable Diagnostics Monitor and GPS ports on Gobi 2000 2010-10-22 10:21:49 -07:00
safe_serial.c USB: safe_serial: straighten out read processing 2010-05-20 13:21:49 -07:00
sam-ba.c USB: sam-ba: add driver for Atmel SAM Boot Assistant (SAM-BA) 2010-10-22 10:21:20 -07:00
siemens_mpi.c USB serial: add missing .usb_driver field in serial drivers 2011-01-22 18:38:59 -08:00
sierra.c drivers/usb: Remove unnecessary return's from void functions 2010-08-10 14:25:42 +02:00
spcp8x5.c USB: serial: handle Data Carrier Detect changes 2011-01-22 18:53:26 -08:00
ssu100.c USB: ssu100: remove max_packet_size calculation 2010-11-11 05:51:15 -08:00
symbolserial.c include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 2010-03-30 22:02:32 +09:00
ti_usb_3410_5052.c USB: ti_usb: fix module removal 2011-02-03 16:40:59 -08:00
ti_usb_3410_5052.h USB: ti_usb_3410_5052: adding multitech dialup fax/modem devices 2010-04-22 15:18:20 -07:00
usb_debug.c USB serial: add missing .usb_driver field in serial drivers 2011-01-22 18:38:59 -08:00
usb_wwan.c USB: serial/usb_wwan, fix tty NULL dereference 2011-02-17 10:30:25 -08:00
usb-serial.c USB serial: add missing .usb_driver field in serial drivers 2011-01-22 18:38:59 -08:00
usb-wwan.h usb-wwan: implement TIOCGSERIAL and TIOCSSERIAL to avoid blocking close(2) 2010-11-30 16:44:57 -08:00
visor.c USB: Add Samsung SGH-I500/Android modem ID switch to visor driver 2011-02-17 10:30:23 -08:00
visor.h USB: visor.h: checkpatch cleanups 2010-05-20 13:21:47 -07:00
vivopay-serial.c USB: serial: Add support for ViVOtech ViVOpay devices. 2010-03-02 14:54:57 -08:00
whiteheat.c drivers/usb: Remove unnecessary return's from void functions 2010-08-10 14:25:42 +02:00
whiteheat.h
zio.c USB Serial Driver: ZIO Motherboard 2010-05-20 13:21:32 -07:00