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Michal Miroslaw 485311a23c [PATCH] dm: BUG/OOPS fix 
Fix BUG I tripped on while testing failover and multipathing.

BUG shows up on error path in multipath_ctr() when parse_priority_group()
fails after returning at least once without error.  The fix is to
initialize m->ti early - just after alloc()ing it.

BUG: unable to handle kernel NULL pointer dereference at virtual address 00000000
 printing eip:
c027c3d2
*pde = 00000000
Oops: 0000 [#3]
Modules linked in: qla2xxx ext3 jbd mbcache sg ide_cd cdrom floppy
CPU:    0
EIP:    0060:[<c027c3d2>]    Not tainted VLI
EFLAGS: 00010202   (2.6.17.3 #1)
EIP is at dm_put_device+0xf/0x3b
eax: 00000001   ebx: ee4fcac0   ecx: 00000000   edx: ee4fcac0
esi: ee4fc4e0   edi: ee4fc4e0   ebp: 00000000   esp: c5db3e78
ds: 007b   es: 007b   ss: 0068
Process multipathd (pid: 15912, threadinfo=c5db2000 task=ef485a90)
Stack: ec4eda40 c02816bd ee4fc4c0 00000000 f7e89498 f883e0bc c02816f6 f7e89480
       f7e8948c c0281801 ffffffea f7e89480 f883e080 c0281ffe 00000001 00000000
       00000004 dfe9cab8 f7a693c0 f883e080 f883e0c0 ca4b99c0 c027c6ee 01400000
Call Trace:
 <c02816bd> free_pgpaths+0x31/0x45  <c02816f6> free_priority_group+0x25/0x2e
 <c0281801> free_multipath+0x35/0x67  <c0281ffe> multipath_ctr+0x123/0x12d
 <c027c6ee> dm_table_add_target+0x11e/0x18b  <c027e5b4> populate_table+0x8a/0xaf
 <c027e62b> table_load+0x52/0xf9  <c027ec23> ctl_ioctl+0xca/0xfc
 <c027e5d9> table_load+0x0/0xf9  <c0152146> do_ioctl+0x3e/0x43
 <c0152360> vfs_ioctl+0x16c/0x178  <c01523b4> sys_ioctl+0x48/0x60
 <c01029b3> syscall_call+0x7/0xb
Code: 97 f0 00 00 00 89 c1 83 c9 01 80 e2 01 0f 44 c1 88 43 14 8b 04 24 59 5b 5e 5f 5d c3 53 89 c1 89 d3 ff 4a 08 0f 94 c0 84 c0 74 2a <8b> 01 8b 10 89 d8 e8 f6 fb ff ff 8b 03 8b 53 04 89 50 04 89 02
EIP: [<c027c3d2>] dm_put_device+0xf/0x3b SS:ESP 0068:c5db3e78

Signed-off-by: Michal Miroslaw <mirq-linux@rere.qmqm.pl>
Acked-by: Alasdair G Kergon <agk@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-08-14 12:54:29 -07:00
..
acorn [PATCH] irq-flags: misc drivers: Use the new IRQF_ constants 2006-07-02 13:58:50 -07:00
acpi [PATCH] memory hotadd fixes: avoid registering res twice 2006-08-06 08:57:49 -07:00
amba [PATCH] 64bit resource: fix up printks for resources in misc drivers 2006-06-27 09:23:59 -07:00
atm [ATM]: Typo in drivers/atm/Kconfig... 2006-07-08 13:30:09 -07:00
base [PATCH] cpu hotplug: use hotplug version of registration in late inits 2006-07-31 13:28:39 -07:00
block [PATCH] nbd: Abort request on data reception failure 2006-07-31 13:28:39 -07:00
bluetooth [Bluetooth] Enable SCO support for Broadcom HID proxy dongle 2006-07-24 12:44:34 -07:00
cdrom [PATCH] cdrom: fix bad cgc.buflen assignment 2006-07-10 13:24:15 -07:00
char Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/dtor/input 2006-08-06 09:12:49 -07:00
clocksource [PATCH] GTOD: add scx200 HRT clocksource 2006-06-26 09:58:21 -07:00
connector [PATCH] Process Events: Fix biarch compatibility issue. use __u64 timestamp 2006-07-31 13:28:36 -07:00
cpufreq [CPUFREQ] [2/2] demand load governor modules. 2006-07-31 18:37:06 -04:00
crypto [CRYPTO] padlock: Fix alignment after aes_ctx rearrange 2006-07-15 11:08:50 +10:00
dio
dma [I/OAT]: Remove pci_module_init() from Intel I/OAT DMA engine 2006-07-21 14:50:13 -07:00
edac [PATCH] drivers/edac/edac_mc.h must #include <linux/platform_device.h> 2006-08-06 08:57:46 -07:00
eisa Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
fc4 [SCSI] More buffer->request_buffer changes 2006-07-14 09:41:13 -05:00
firmware Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
hwmon [PATCH] hwmon: Fix for first generation Abit uGuru chips 2006-07-12 15:43:07 -07:00
i2c [PATCH] SCX200_ACB: eliminate spurious timeout errors 2006-08-06 08:57:49 -07:00
ide [PATCH] PATCH: 2.6.18 oops on boot fix for IDE 2006-08-09 15:43:27 -07:00
ieee1394 [PATCH] ieee1394: sbp2: enable auto spin-up for Maxtor disks 2006-08-06 08:57:48 -07:00
infiniband IB/uverbs: Avoid a crash on device hot remove 2006-08-03 10:56:42 -07:00
input Input: atkbd - restore repeat rate when resuming 2006-08-04 22:52:46 -04:00
isdn [PATCH] eicon: fix define conflict with ptrace 2006-08-06 08:57:48 -07:00
leds [PATCH] net48xx LED cleanups 2006-07-14 21:53:54 -07:00
macintosh Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2006-07-31 13:39:52 -07:00
mca
md [PATCH] dm: BUG/OOPS fix 2006-08-14 12:54:29 -07:00
media V4L/DVB (4431): Add several error checks to dst 2006-08-08 15:53:04 -03:00
message Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-rc-fixes-2.6 2006-07-21 12:04:53 -07:00
mfd [ARM] 3727/1: fix ucb initialization on collie 2006-07-11 22:54:15 +01:00
misc [PATCH] irq-flags: misc drivers: Use the new IRQF_ constants 2006-07-02 13:58:50 -07:00
mmc [MMC] Another stray 'io' reference 2006-08-07 14:47:54 +01:00
mtd Merge git://git.infradead.org/mtd-2.6 2006-07-03 21:29:08 -07:00
net Merge gregkh@master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2006-08-09 11:49:13 -07:00
nubus Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
oprofile
parisc [PATCH] irq-flags: PARISC: Use the new IRQF_ constants 2006-07-02 13:58:52 -07:00
parport [PATCH] irq-flags: misc drivers: Use the new IRQF_ constants 2006-07-02 13:58:50 -07:00
pci PCI: remove dead HOTPLUG_PCI_SHPC_PHPRM_LEGACY option. 2006-08-11 14:06:05 -07:00
pcmcia [PATCH] pcmcia: fix ioctl GET_CONFIGURATION_INFO for pcmcia_cards 2006-07-31 13:28:41 -07:00
pnp [PATCH] pnpacpi: reject ACPI_PRODUCER resources 2006-08-06 08:57:49 -07:00
rapidio Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
rtc [PATCH] RTC subsystem, Add ISL1208 support 2006-07-14 21:53:53 -07:00
s390 [S390] lost interrupt after chpid vary off/on cycle. 2006-08-07 17:00:33 +02:00
sbus [SPARC] sbus: Make sure sbus nodes are named uniquely. 2006-07-21 14:18:06 -07:00
scsi Merge gregkh@master.kernel.org:/home/rmk/linux-2.6-arm 2006-08-10 15:07:17 -07:00
serial [SERIAL] sunzilog: Fix instance enumeration. 2006-07-21 14:18:25 -07:00
sh
sn [PATCH] irq-flags: misc drivers: Use the new IRQF_ constants 2006-07-02 13:58:50 -07:00
spi [PATCH] lockdep: annotate on-stack completions 2006-07-03 15:27:09 -07:00
tc [PATCH] irq-flags: misc drivers: Use the new IRQF_ constants 2006-07-02 13:58:50 -07:00
telephony Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/devfs-2.6 2006-06-29 14:19:21 -07:00
usb USB: usbtest.c: unsigned retval makes ctrl_out return 0 in case of error 2006-08-11 14:06:06 -07:00
video [PATCH] add imacfb documentation and detection 2006-08-14 12:54:28 -07:00
w1 [PATCH] w1: remove drivers/w1/w1.h 2006-07-12 15:38:28 -07:00
zorro Remove obsolete #include <linux/config.h> 2006-06-30 19:25:36 +02:00
Kconfig
Makefile [PATCH] Time: i386 Clocksource Drivers 2006-06-26 09:58:21 -07:00