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Carsten Otte 7b439d2530 [S390] vt220 console, initialize list head before use 
This patch fixes a null pointer dereference during initialisation when no
sclp event facility is available:
sclp vt220 tty driver: could not register vt220 - sclp_register returned -5
Unable to handle kernel paging request at virtual user address 0000000000000000
Oops: 0004 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 Not tainted 2.6.26-rc3-kvm-bigiron-00968-gd939e93-dirty #30
Process swapper (pid: 0, task: 0000000000600be0, ksp: 000000000064a000)
Krnl PSW : 0400000180000000 0000000000320d8c (sclp_unregister+0x48/0x8c)
           R:0 T:1 IO:0 EX:0 Key:0 M:0 W:0 P:0 AS:0 CC:0 PM:0 EA:3
Krnl GPRS: 0000000000000000 0000000000000000 0000000000630478 0700000000649c20
           0000000000000000 0000000000433060 000000000064a660 0000000002e26000
           00000000006db000 0000000000000000 0000000000a78578 0000000000649b80
           0000000000630dc0 000000000044fa20 0000000000320d76 0000000000649b80
Krnl Code: 0000000000320d7c: e310c0080004       lg      %r1,8(%r12)
           0000000000320d82: b9040032           lgr     %r3,%r2
           0000000000320d86: c02000187b79       larl    %r2,630478
          >0000000000320d8c: e34010000024       stg     %r4,0(%r1)
           0000000000320d92: e31040080024       stg     %r1,8(%r4)
           0000000000320d98: c01100200200       lgfi    %r1,2097664
           0000000000320d9e: e310c0080024       stg     %r1,8(%r12)
           0000000000320da4: c01100100100       lgfi    %r1,1048832
Call Trace:
([<0000000000320d76>] sclp_unregister+0x32/0x8c)
 [<00000000006657b4>] __sclp_vt220_cleanup+0xc4/0xe0
 [<000000000066595c>] __sclp_vt220_init+0x18c/0x1a0
 [<0000000000665aba>] sclp_vt220_con_init+0x42/0x68
 [<00000000006601ca>] console_init+0x4e/0x68
 [<000000000064acae>] start_kernel+0x3a2/0x4dc
 [<0000000000100020>] _stext+0x20/0x80
INFO: lockdep is turned off.
Last Breaking-Event-Address:
 [<000000000041f964>] _spin_lock_irqsave+0xb0/0xb4
 <4>---[ end trace 31fd0ba7d8756001 ]---

The issue is caused by a list_empty() check in __sclp_vt220_cleanup, which
usually fails on non-initialized list heads that contain {NULL,NULL} instead.

Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-06-10 10:03:27 +02:00
..
accessibility Kconfig: improved help for CONFIG_ACCESSIBILITY 2008-05-08 10:46:55 -07:00
acorn/char
acpi acpi: fix integer as NULL pointer warning 2008-05-23 08:11:06 -07:00
amba
ata libata: fix G5 SATA broken on -rc5 2008-06-05 08:36:37 -07:00
atm drivers/atm/: remove CVS keywords 2008-05-20 14:52:25 -07:00
auxdisplay
base driver-core: prepare for 2.6.27 api change by adding dev_set_name 2008-05-29 21:10:01 -07:00
block Add 'rd' alias to new brd ramdisk driver 2008-06-05 14:23:12 -07:00
bluetooth hci_usb.h: fix hard-to-trigger race 2008-05-02 16:45:10 -07:00
cdrom [POWERPC] iSeries: Remove unused mail address 2008-05-23 16:45:04 +10:00
char ipwireless: Fix blocked sending 2008-06-06 11:31:02 -07:00
clocksource
connector
cpufreq Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq 2008-06-09 11:27:55 -07:00
cpuidle
crypto
dca
dio
dma iop-adma: fixup some kzalloc/memset confusions 2008-05-20 13:51:20 -07:00
edac edac: mpc85xx: fix building as a module 2008-05-24 09:56:13 -07:00
eisa
firewire firewire: prevent userspace from accessing shut down devices 2008-05-20 18:24:17 +02:00
firmware edd: fix incorrect return of 1 from module_init 2008-06-06 11:29:09 -07:00
gpio gpiolib: fix off by one errors 2008-05-24 09:56:11 -07:00
hid HID: remove CVS keywords 2008-05-20 16:44:43 +02:00
hwmon hdaps: fix module loading on Thinkpad T61P 2008-06-06 11:29:13 -07:00
i2c i2c/max6875: Really prevent 24RF08 corruption 2008-05-18 20:49:41 +02:00
ide ide: fix race in device_create 2008-05-20 13:31:54 -07:00
ieee1394 ieee1394: sbp2: use correct size of command descriptor block 2008-05-20 18:24:17 +02:00
infiniband IB/core: Remove IB_DEVICE_SEND_W_INV capability flag 2008-06-09 09:58:42 -07:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2008-05-30 10:17:19 -07:00
isdn isdn: fix integer as NULL pointer warning 2008-05-23 08:11:06 -07:00
leds LEDS: fix race in device_create 2008-05-20 13:31:55 -07:00
lguest virtio: set device index in common code. 2008-05-30 15:09:42 +10:00
macintosh [POWERPC] macintosh: Replace deprecated __initcall with device_initcall 2008-05-15 20:50:00 +10:00
mca
md md: do not compute parity unless it is on a failed drive 2008-06-06 11:29:08 -07:00
media V4L/DVB (8001): dib0070: fix dib0070_attach when !CONFIG_DVB_TUNER_DIB0070 2008-06-05 10:26:21 -03:00
memstick
message [SCSI] fusion mpt: fix target missing after resetting external raid 2008-05-27 10:58:09 -05:00
mfd HTC_EGPIO is ARM-only 2008-05-21 16:56:00 -07:00
misc fujitsu-laptop: autoload module on Lifebook P1510D 2008-06-06 11:29:09 -07:00
mmc mmc: Fix crash in mmc_block on 64-bit 2008-06-05 16:14:17 -07:00
mtd Merge git://git.infradead.org/~dwmw2/mtd-2.6.26 2008-06-06 11:31:18 -07:00
net [POWERPC] ehea: Remove dependency on MEMORY_HOTPLUG 2008-06-09 11:32:44 +10:00
nubus
of rtc-ds1374: rename device to just "ds1374" 2008-06-06 11:29:10 -07:00
oprofile oprofile: don't request cache line alignment for cpu_buffer 2008-05-14 19:11:12 -07:00
parisc drivers/parisc: replace remaining __FUNCTION__ occurrences 2008-05-15 10:38:54 -04:00
parport debugobjects: add timer specific object debugging code 2008-04-30 08:29:53 -07:00
pci PCI: fix rpadlpar pci hotplug driver sysfs usage 2008-05-30 09:50:46 -07:00
pcmcia electra_cf: Add MODULE_DEVICE_TABLE() 2008-05-27 16:07:45 -05:00
pnp PNP: skip UNSET MEM resources as well as DISABLED ones 2008-06-05 10:30:37 -07:00
power power_supply: Fix race in power_supply_uevent 2008-06-10 02:13:51 +04:00
ps3 [POWERPC] PS3: Remove unsupported wakeup sources 2008-05-02 15:00:44 +10:00
rapidio
rtc rtc: class driver for ppc_md RTC functions 2008-06-06 11:29:13 -07:00
s390 [S390] vt220 console, initialize list head before use 2008-06-10 10:03:27 +02:00
sbus sbus bpp: instances missed in s/dev_name/bpp_dev_name/ 2008-05-21 16:55:59 -07:00
scsi Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6 2008-06-04 08:36:09 -07:00
serial Blackfin serial driver: fix up tty core set_ldisc API change breakage bug 2008-06-07 15:36:33 +08:00
sh
sn
spi spi: fix refcount-related spidev oops-on-rmmod 2008-06-06 11:29:08 -07:00
ssb ssb: Fix context assertion in ssb_pcicore_dev_irqvecs_enable 2008-06-04 15:57:10 -04:00
tc
telephony
thermal
uio UIO: fix race in device_create 2008-05-20 13:31:55 -07:00
usb usb: r8a66597-hcd: Add support for SH7723 USB host 2008-06-09 16:04:12 +09:00
video fbdev: export symbol fb_mode_option 2008-06-06 11:29:12 -07:00
virtio virtio: force callback on empty. 2008-05-30 15:09:46 +10:00
w1 drivers: replace remaining __FUNCTION__ occurrences 2008-04-30 08:29:53 -07:00
watchdog drivers/watchdog/geodewdt.c: build fix 2008-05-30 10:16:58 -07:00
xen
zorro
Kconfig Basic braille screen reader support 2008-04-30 08:29:52 -07:00
Makefile Basic braille screen reader support 2008-04-30 08:29:52 -07:00