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dingtianhong 2c8a01894a dummy: fix oops when loading the dummy failed 
We rename the dummy in modprobe.conf like this:

install dummy0 /sbin/modprobe -o dummy0 --ignore-install dummy
install dummy1 /sbin/modprobe -o dummy1 --ignore-install dummy

We got oops when we run the command:

modprobe dummy0
modprobe dummy1

------------[ cut here ]------------

[ 3302.187584] BUG: unable to handle kernel NULL pointer dereference at 0000000000000008
[ 3302.195411] IP: [<ffffffff813fe62a>] __rtnl_link_unregister+0x9a/0xd0
[ 3302.201844] PGD 85c94a067 PUD 8517bd067 PMD 0
[ 3302.206305] Oops: 0002 [#1] SMP
[ 3302.299737] task: ffff88105ccea300 ti: ffff880eba4a0000 task.ti: ffff880eba4a0000
[ 3302.307186] RIP: 0010:[<ffffffff813fe62a>]  [<ffffffff813fe62a>] __rtnl_link_unregister+0x9a/0xd0
[ 3302.316044] RSP: 0018:ffff880eba4a1dd8  EFLAGS: 00010246
[ 3302.321332] RAX: 0000000000000000 RBX: ffffffff81a9d738 RCX: 0000000000000002
[ 3302.328436] RDX: 0000000000000000 RSI: ffffffffa04d602c RDI: ffff880eba4a1dd8
[ 3302.335541] RBP: ffff880eba4a1e18 R08: dead000000200200 R09: dead000000100100
[ 3302.342644] R10: 0000000000000080 R11: 0000000000000003 R12: ffffffff81a9d788
[ 3302.349748] R13: ffffffffa04d7020 R14: ffffffff81a9d670 R15: ffff880eba4a1dd8
[ 3302.364910] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 3302.370630] CR2: 0000000000000008 CR3: 000000085e15e000 CR4: 00000000000427e0
[ 3302.377734] DR0: 0000000000000003 DR1: 00000000000000b0 DR2: 0000000000000001
[ 3302.384838] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
[ 3302.391940] Stack:
[ 3302.393944]  ffff880eba4a1dd8 ffff880eba4a1dd8 ffff880eba4a1e18 ffffffffa04d70c0
[ 3302.401350]  00000000ffffffef ffffffffa01a8000 0000000000000000 ffffffff816111c8
[ 3302.408758]  ffff880eba4a1e48 ffffffffa01a80be ffff880eba4a1e48 ffffffffa04d70c0
[ 3302.416164] Call Trace:
[ 3302.418605]  [<ffffffffa01a8000>] ? 0xffffffffa01a7fff
[ 3302.423727]  [<ffffffffa01a80be>] dummy_init_module+0xbe/0x1000 [dummy0]
[ 3302.430405]  [<ffffffffa01a8000>] ? 0xffffffffa01a7fff
[ 3302.435535]  [<ffffffff81000322>] do_one_initcall+0x152/0x1b0
[ 3302.441263]  [<ffffffff810ab24b>] do_init_module+0x7b/0x200
[ 3302.446824]  [<ffffffff810ad3d2>] load_module+0x4e2/0x530
[ 3302.452215]  [<ffffffff8127ae40>] ? ddebug_dyndbg_boot_param_cb+0x60/0x60
[ 3302.458979]  [<ffffffff810ad5f1>] SyS_init_module+0xd1/0x130
[ 3302.464627]  [<ffffffff814b9652>] system_call_fastpath+0x16/0x1b
[ 3302.490090] RIP  [<ffffffff813fe62a>] __rtnl_link_unregister+0x9a/0xd0
[ 3302.496607]  RSP <ffff880eba4a1dd8>
[ 3302.500084] CR2: 0000000000000008
[ 3302.503466] ---[ end trace 8342d49cd49f78ed ]---

The reason is that when loading dummy, if __rtnl_link_register() return failed,
the init_module should return and avoid take the wrong path.

Signed-off-by: Tan Xiaojun <tanxiaojun@huawei.com>
Signed-off-by: Ding Tianhong <dingtianhong@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2013-07-11 11:59:20 -07:00
..
accessibility
…
acpi
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
2013-07-04 10:29:23 -07:00
amba
…
ata
Merge branch 'for-3.11' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
2013-07-03 19:49:46 -07:00
atm
net, atm/ambassader: convert skb->tail into skb_tail_pointer(skb)
2013-06-17 17:12:20 -07:00
auxdisplay
…
base
Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
2013-07-09 16:04:31 -07:00
bcma
bcma: add support for BCM43142
2013-06-27 13:42:16 -04:00
block
Merge branch 'next' of git://git.monstr.eu/linux-2.6-microblaze
2013-07-10 10:16:07 -07:00
bluetooth
Bluetooth: Add missing reset_resume dev_pm_ops
2013-06-23 00:23:53 +01:00
bus
ARM SoC device tree changes
2013-07-02 14:23:01 -07:00
cdrom
drivers/cdrom/cdrom.c: use kzalloc() for failing hardware
2013-07-03 16:07:25 -07:00
char
Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
2013-07-09 16:04:31 -07:00
clk
Power management and ACPI updates for 3.11-rc1
2013-07-03 14:35:40 -07:00
clocksource
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-07-06 14:09:38 -07:00
connector
…
cpufreq
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-07-04 11:40:58 -07:00
cpuidle
Power management and ACPI updates for 3.11-rc1
2013-07-03 14:35:40 -07:00
crypto
crypto: talitos: use sg_pcopy_to_buffer()
2013-07-09 10:33:30 -07:00
dca
…
devfreq
Merge branch 'akpm' (updates from Andrew Morton)
2013-07-03 17:12:13 -07:00
dio
…
dma
drivers/dma/iop-adma.c: fix new warnings
2013-07-09 10:33:19 -07:00
edac
Add MCE signatures for family 0x15, models 30-3f.
2013-07-03 13:11:18 -07:00
eisa
…
extcon
drivers: avoid format string in dev_set_name
2013-07-03 16:07:41 -07:00
firewire
…
firmware
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
2013-07-04 10:29:23 -07:00
fmc
FMC: fix error handling in probe() function
2013-06-24 16:23:25 -07:00
gpio
Power management and ACPI updates for 3.11-rc1
2013-07-03 14:35:40 -07:00
gpu
Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
2013-07-09 16:04:31 -07:00
hid
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2013-07-04 15:35:08 -07:00
hsi
drivers: avoid format string in dev_set_name
2013-07-03 16:07:41 -07:00
hv
drivers: hv: allocate synic structures before hv_synic_init()
2013-06-24 16:24:17 -07:00
hwmon
hwmon: (lm63) Drop redundant safety on cache lifetime
2013-07-08 14:18:24 +02:00
hwspinlock
…
i2c
Merge branch 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
2013-07-04 14:02:09 -07:00
ide
drivers: avoid format string in dev_set_name
2013-07-03 16:07:41 -07:00
idle
…
iio
For the 3.11 merge we only have one new MFD driver for the Kontron PLD.
2013-07-10 11:10:27 -07:00
infiniband
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2013-07-09 18:24:39 -07:00
input
For the 3.11 merge we only have one new MFD driver for the Kontron PLD.
2013-07-10 11:10:27 -07:00
iommu
drivers/iommu/msm_iommu_dev.c: fix leak and clean up error paths
2013-07-09 10:33:20 -07:00
ipack
…
irqchip
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-07-02 16:14:35 -07:00
isdn
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2013-07-09 18:24:39 -07:00
leds
leds: mc13783: Fix "uninitialized variable" warning
2013-07-02 08:44:02 -07:00
lguest
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-07-04 11:40:58 -07:00
macintosh
macintosh/windfarm: Remove obsolete cleanup for clientdata
2013-07-01 11:46:56 +10:00
mailbox
…
md
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-07-04 11:40:58 -07:00
media
IEEE 1394 (FireWire) subsystem changes post v3.10:
2013-07-10 11:02:58 -07:00
memory
memory: tegra30-mc: Fix IRQ handler.
2013-06-17 16:46:06 -07:00
memstick
drivers/memstick/host/r592.c: convert to module_pci_driver
2013-07-03 16:08:06 -07:00
message
drivers: avoid format strings in names passed to alloc_workqueue()
2013-07-03 16:07:41 -07:00
mfd
For the 3.11 merge we only have one new MFD driver for the Kontron PLD.
2013-07-10 11:10:27 -07:00
misc
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2013-07-04 11:40:58 -07:00
mmc
MMC highlights for 3.11:
2013-07-10 11:16:00 -07:00
mtd
A couple of fixes and clean-ups, allow for assigning user-defined
2013-07-05 12:09:48 -07:00
net
dummy: fix oops when loading the dummy failed
2013-07-11 11:59:20 -07:00
nfc
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2013-07-09 18:24:39 -07:00
ntb
…
nubus
…
of
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2013-07-09 18:24:39 -07:00
oprofile
…
parisc
parisc: fix LMMIO mismatch between PAT length and MASK register
2013-07-09 22:09:16 +02:00
parport
Merge branch 'akpm' (updates from Andrew Morton)
2013-07-03 17:12:13 -07:00
pci
Merge branch 'akpm' (updates from Andrew Morton)
2013-07-03 17:12:13 -07:00
pcmcia
Driver core patches for 3.11-rc1
2013-07-02 11:44:19 -07:00
pinctrl
Pin control changes for the v3.11 kernel cycle:
2013-07-03 11:48:03 -07:00
platform
drivers: avoid format string in dev_set_name
2013-07-03 16:07:41 -07:00
pnp
Power management and ACPI updates for 3.11-rc1
2013-07-03 14:35:40 -07:00
power
Nothing exciting this time, just assorted fixes and cleanups.
2013-07-10 11:13:00 -07:00
pps
pps-gpio: add device-tree binding and support
2013-07-03 16:08:06 -07:00
ps3
…
ptp
build some drivers only when compile-testing
2013-06-24 16:41:32 -07:00
pwm
pwm: pwm-tiehrpwm: Use clk_enable/disable instead clk_prepare/unprepare.
2013-06-26 23:23:54 +02:00
rapidio
rapidio: change endpoint device name format
2013-07-03 16:08:05 -07:00
regulator
For the 3.11 merge we only have one new MFD driver for the Kontron PLD.
2013-07-10 11:10:27 -07:00
remoteproc
…
reset
…
rpmsg
…
rtc
For the 3.11 merge we only have one new MFD driver for the Kontron PLD.
2013-07-10 11:10:27 -07:00
s390
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2013-07-09 18:24:39 -07:00
sbus
…
scsi
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2013-07-09 18:24:39 -07:00
sfi
…
sh
Merge branch 'pm-assorted'
2013-06-28 13:01:40 +02:00
sn
…
spi
Merge branch 'akpm' (updates from Andrew Morton)
2013-07-03 17:12:13 -07:00
ssb
ssb/trivial: replace numeric with standard PM state macros
2013-06-28 22:11:48 -07:00
staging
IEEE 1394 (FireWire) subsystem changes post v3.10:
2013-07-10 11:02:58 -07:00
target
iscsi-target: Remove left over v3.10-rc debug printks
2013-06-20 16:47:41 -07:00
tc
…
thermal
thermal: exynos: Support both EXYNOS4X12 SoCs
2013-06-19 01:31:50 +09:00
tty
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2013-07-04 15:35:08 -07:00
uio
uio: use vma_pages() to replace (vm_end - vm_start) >> PAGE_SHIFT
2013-07-03 16:07:26 -07:00
usb
For the 3.11 merge we only have one new MFD driver for the Kontron PLD.
2013-07-10 11:10:27 -07:00
uwb
drivers: avoid format string in dev_set_name
2013-07-03 16:07:41 -07:00
vfio
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
2013-07-04 10:29:23 -07:00
vhost
vhost-net: fix use-after-free in vhost_net_flush
2013-07-09 12:55:48 -07:00
video
Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
2013-07-09 16:04:31 -07:00
virt
…
virtio
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2013-07-09 18:24:39 -07:00
vlynq
…
vme
vme: vme_tsi148.c: fix error return code in tsi148_probe()
2013-06-24 16:23:25 -07:00
w1
drivers/w1/slaves/w1_ds2408.c: add magic sequence to disable P0 test mode
2013-07-03 16:08:06 -07:00
watchdog
For the 3.11 merge we only have one new MFD driver for the Kontron PLD.
2013-07-10 11:10:27 -07:00
xen
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2013-07-06 14:09:38 -07:00
zorro
zorro: switch to fixed_size_llseek()
2013-06-29 12:57:28 +04:00
Kconfig
For the 3.11 merge we only have one new MFD driver for the Kontron PLD.
2013-07-10 11:10:27 -07:00
Makefile
For the 3.11 merge we only have one new MFD driver for the Kontron PLD.
2013-07-10 11:10:27 -07:00