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
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
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
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
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
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
pwm
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
tc
thermal
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
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