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OpenCloudOS-Kernel
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Swen Schillig 5bfb2c3148 [SCSI] zfcp: Fix common FCP request reception 
The reception of a common FCP request should only be evaluated if the
corresponding SCSI request data is available. Therefore put the
information under the lock protection and verify the existence before
processing.  This fixes the following kernel panic.

Unable to handle kernel pointer dereference at virtual kernel address 0000000180000000
Oops: 003b [#1] PREEMPT SMP DEBUG_PAGEALLOC
CPU: 0 Not tainted 2.6.35.7-45.x.20101007-s390xdefault #1
Process blast (pid: 9711, task: 00000000a3be8e40, ksp: 00000000b221bac0)
Krnl PSW : 0704300180000000 0000000000489878 (zfcp_fsf_fcp_handler_common+0x4c/0x3a0)
           R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:0 CC:3 PM:0 EA:3
Krnl GPRS: 00000000b663c1b8 0000000180000000 000000007ab5bdf0 0000000000000000
           00000000b0ccd800 0000000000000018 07000000a3be8e78 00000000b5d3e600
           000000007ab5bdf0 0000000000000066 00000000b72137f0 00000000b72137f0
           0000000000000000 00000000005a8178 00000000bdf37a60 00000000bdf379f0
Krnl Code: 0000000000489866: e3c030000004       lg      %r12,0(%r3)
           000000000048986c: e310c0000004       lg      %r1,0(%r12)
           0000000000489872: e31011e00004       lg      %r1,480(%r1)
          >0000000000489878: 581011ec           l       %r1,492(%r1)
           000000000048987c: a774001c           brc     7,4898b4
           0000000000489880: b91400b1           lgfr    %r11,%r1
           0000000000489884: 5810405c           l       %r1,92(%r4)
           0000000000489888: 5510d00c           cl      %r1,12(%r13)
Call Trace:
([<000000000010d344>] debug_event_common+0x22c/0x244)
 [<000000000048a0b4>] zfcp_fsf_fcp_cmnd_handler+0x2c/0x3b4
 [<000000000048b5b6>] zfcp_fsf_req_complete+0x1b6/0x9dc
 [<000000000048bede>] zfcp_fsf_reqid_check+0x102/0x138
 [<000000000048e478>] zfcp_qdio_int_resp+0x70/0x110
 [<000000000044a1ec>] qdio_kick_handler+0xb0/0x19c
 [<000000000044c228>] __tiqdio_inbound_processing+0x30c/0xebc
 [<000000000014a5fc>] tasklet_action+0x1b4/0x1e8
 [<000000000014b676>] __do_softirq+0x106/0x1cc
 [<000000000010d91a>] do_softirq+0xe6/0xec
 [<000000000014b0c8>] irq_exit+0xd4/0xd8
 [<00000000004307ec>] do_IRQ+0x7c0/0xf54
 [<0000000000114d28>] io_return+0x0/0x16
 [<000000000055fef0>] sub_preempt_count+0x50/0xe4
([<00000000b1f873c0>] 0xb1f873c0)
 [<000000000055e25a>] _raw_spin_unlock+0x46/0x74
 [<0000000000241c40>] __d_lookup+0x288/0x2c8
 [<000000000023502c>] do_lookup+0x7c/0x25c
 [<0000000000237fa8>] link_path_walk+0x5e4/0xe2c
 [<0000000000238a00>] path_walk+0x98/0x148
 [<0000000000238c98>] do_path_lookup+0x74/0xc0
 [<000000000023989c>] user_path_at+0x64/0xa4
 [<000000000022e366>] vfs_fstatat+0x4e/0xb0
 [<000000000022e4d6>] SyS_newstat+0x2e/0x54
 [<00000000001146de>] sysc_noemu+0x10/0x16
 [<0000020000153456>] 0x20000153456
INFO: lockdep is turned off.
Last Breaking-Event-Address:
 [<000000000048a0ae>] zfcp_fsf_fcp_cmnd_handler+0x26/0x3b4

Signed-off-by: Swen Schillig <swen@vnet.ibm.com>
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
 		2010-12-09 09:41:17 -06:00
..
accessibility
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acpi ACPI: debugfs custom_method open to non-root 2010-11-13 09:52:16 -08:00
amba
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ata sata_via: apply magic FIFO fix to vt6420 too 2010-11-19 13:16:26 -05:00
atm solos: Refuse to upgrade firmware with older FPGA. It doesn't work. 2010-11-08 12:17:05 -08:00
auxdisplay
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base PM: Allow devices to be removed during late suspend and early resume 2010-11-11 01:50:53 +01:00
block Merge branch 'rbd-sysfs' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client 2010-12-02 08:05:22 -08:00
bluetooth Bluetooth: Add MacBookAir3,1(2) support 2010-11-09 01:08:53 -02:00
cdrom cdrom: gdrom: ctrl_in/outX to __raw_read/writeX conversion. 2010-10-27 14:33:39 +09:00
char agp/intel: Fix wrong kunmap in i830_cleanup() 2010-12-05 10:40:17 +00:00
clocksource ARM: shmobile: remove sh_timer_config clk member 2010-10-31 10:40:39 -04:00
connector connector: remove lazy workqueue creation 2010-10-24 14:20:01 -07:00
cpufreq
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cpuidle
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crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2010-11-13 09:55:56 -08:00
dca
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dio
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dma dma: shdma: add a MODULE_ALIAS() to allow module autoloading 2010-11-25 16:29:41 +09:00
edac EDAC, MCE: Fix edac_init_mce_inject error handling 2010-11-22 15:35:32 +01:00
eisa
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firewire Merge branch 'fwnet' of git://git.kernel.org/pub/scm/linux/kernel/git/ieee1394/linux1394-2.6 2010-11-28 12:24:20 -08:00
firmware dmi: log board, system, and BIOS information 2010-10-27 18:03:05 -07:00
gpio cs5535-gpio: apply CS5536 errata workaround for GPIOs 2010-12-02 14:51:15 -08:00
gpu drm/i915: i915 cannot provide switcher services. 2010-12-08 15:40:44 +10:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid 2010-12-02 17:40:04 -08:00
hwmon hwmon: (lis3lv02d_i2c) Fix compile warnings 2010-11-22 12:23:39 -08:00
i2c i2c/algos: convert Kconfig to use the menu's `visible' keyword 2010-11-22 11:27:35 -02:00
ide ide: clean up timed out request handling 2010-10-26 10:17:30 -07:00
idle Merge branch 'idle-release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-idle-2.6 2010-10-26 17:28:07 -07:00
ieee802154
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infiniband Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2010-12-02 12:10:56 -08:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2010-12-08 06:34:02 -08:00
isdn isdn: icn: Fix stack corruption bug. 2010-11-24 11:19:05 -08:00
leds leds: fix up dependencies 2010-12-02 14:51:15 -08:00
lguest
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macintosh leds: fix up dependencies 2010-12-02 14:51:15 -08:00
mca
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md md: Call blk_queue_flush() to establish flush/fua support 2010-11-24 16:40:33 +11:00
media Merge branch 'rc-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6 2010-12-05 16:41:13 -08:00
memstick
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message SCSI host lock push-down 2010-11-16 13:33:23 -08:00
mfd mfd: Fix a memory leak when unload mc13xxx-core module 2010-10-29 00:30:43 +02:00
misc drivers/misc/isl29020.c: remove incorrect kfree in isl29020_remove() 2010-11-25 06:50:47 +09:00
mmc mmc: sdhci: 8-bit bus width changes 2010-11-22 15:12:04 -05:00
mtd UBI: fix corrupted PEB detection for NOR flash 2010-12-03 15:49:21 +02:00
net Merge branch 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6 2010-12-02 12:58:16 -08:00
nubus
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of
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oprofile Merge branches 'perf-fixes-for-linus' and 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 2010-10-30 11:43:26 -07:00
parisc parisc: KittyHawk LCD fix 2010-12-04 11:18:25 -05:00
parport Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2010-10-24 13:41:39 -07:00
pci Merge branch 'drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile 2010-11-25 07:42:03 +09:00
pcmcia ARM: 6456/1: Fix for building DEBUG with sa11xx_base.c as a module. 2010-12-04 12:47:48 +00:00
platform wmi: use memcmp instead of strncmp to compare GUIDs 2010-12-06 17:19:13 -05:00
pnp BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
power power: Revert "power_supply: Mark twl4030_charger as broken" 2010-10-29 00:30:44 +02:00
pps
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ps3
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rapidio rapidio: use resource_size() 2010-11-12 07:55:30 -08:00
regulator regulator: fix kernel-doc for set_consumer_device_supply 2010-11-30 15:13:25 +00:00
rtc Merge branches 'sh/rtc' and 'common/clkfwk' into sh/urgent 2010-11-10 18:15:44 +09:00
s390 [SCSI] zfcp: Fix common FCP request reception 2010-12-09 09:41:17 -06:00
sbus Merge branch 'next-devicetree' of git://git.secretlab.ca/git/linux-2.6 2010-10-25 08:19:14 -07:00
scsi [SCSI] Eliminate error handler overload of the SCSI serial number 2010-12-09 09:41:16 -06:00
serial Merge branch 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6 2010-12-02 12:58:16 -08:00
sfi
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sh Merge branch 'common/clkfwk' into sh-fixes-for-linus 2010-11-19 16:43:23 +09:00
sn
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spi atmel_spi: fix warning In function 'atmel_spi_dma_map_xfer' 2010-11-30 17:23:24 +01:00
ssb ssb: b43-pci-bridge: Add new vendor for BCM4318 2010-11-22 15:19:31 -05:00
staging Merge branch 'staging-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging-2.6 2010-12-02 12:59:11 -08:00
tc
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telephony Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl 2010-10-22 10:52:56 -07:00
thermal
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tty Merge branch 'tty-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty-2.6 2010-12-02 12:58:16 -08:00
uio uio: Change mail address of Hans J. Koch 2010-11-10 16:57:11 -08:00
usb Merge branch 'for-greg' of git://gitorious.org/usb/usb into work 2010-11-30 15:52:04 -08:00
uwb UWB: Return UWB_RSV_ALLOC_NOT_FOUND rather than crashing on NULL dereference if kzalloc fails 2010-11-11 07:14:07 -08:00
vhost vhost/net: fix rcu check usage 2010-11-25 11:29:16 +02:00
video lxfb: Maintain video processor palette through suspend/resume 2010-12-01 18:18:56 +09:00
virtio virtio: fix format of sysfs driver/vendor files 2010-11-24 15:21:12 +10:30
vlynq
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w1 w1: don't allow arbitrary users to remove w1 devices 2010-10-27 18:03:17 -07:00
watchdog watchdog: it8712f_wdt: add note to Kconfig 2010-12-02 14:10:32 +00:00
xen Merge branch '2.6.37-rc4-pvhvm-fixes' of git://xenbits.xen.org/people/sstabellini/linux-pvhvm 2010-12-03 11:30:57 -08:00
zorro BKL: remove extraneous #include <smp_lock.h> 2010-11-17 08:59:32 -08:00
Kconfig
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Makefile TTY: create drivers/tty and move the tty core files there 2010-11-05 08:10:33 -07:00