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
..
appletalk
arcnet
bonding	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2013-07-03 14:55:13 -07:00
caif	drivers/net: caif: fix wrong rtnl_is_locked() usage	2013-07-09 12:55:48 -07:00
can	can: at91_can: Use of_match_ptr()	2013-06-27 15:15:42 +02:00
cris
dsa
ethernet	bnx2x: fix tunneling CSUM calculation	2013-07-11 11:48:06 -07:00
fddi
hamradio	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
hippi
hyperv	Fix the VLAN_TAG_PRESENT in netvsc_recv_callback()	2013-06-17 15:58:11 -07:00
ieee802154
irda
phy	drivers: net: phy: at803x: Add missing mdio device id	2013-07-11 11:54:19 -07:00
plip
ppp	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
slip
team	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2013-06-19 16:49:39 -07:00
usb	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2013-07-03 14:55:13 -07:00
vmxnet3
wan	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2013-07-03 14:55:13 -07:00
wimax
wireless	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2013-07-09 18:24:39 -07:00
xen-netback	xen-netback: xenbus.c: use more current logging styles	2013-07-02 00:52:55 -07:00
dummy.c	dummy: fix oops when loading the dummy failed	2013-07-11 11:59:20 -07:00
eql.c
ifb.c	ifb: fix rcu_sched self-detected stalls	2013-07-10 18:44:03 -07:00
Kconfig	packet: nlmon: virtual netlink monitoring device for packet sockets	2013-06-24 16:39:05 -07:00
LICENSE.SRC
loopback.c
macvlan.c	macvtap: Let TUNSETOFFLOAD actually controll offload features.	2013-06-25 16:44:56 -07:00
macvtap.c	macvtap: correctly linearize skb when zerocopy is used	2013-07-10 18:45:52 -07:00
Makefile	packet: nlmon: virtual netlink monitoring device for packet sockets	2013-06-24 16:39:05 -07:00
mdio.c
mii.c
netconsole.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2013-07-09 18:24:39 -07:00
nlmon.c	nlmon: use standard rtnetlink link api for add/del devices	2013-07-02 12:53:17 -07:00
ntb_netdev.c
rionet.c	rapidio/rionet: rework driver initialization and removal	2013-07-03 16:08:04 -07:00
sb1000.c
Space.c
sungem_phy.c
tun.c	tuntap: correctly linearize skb when zerocopy is used	2013-07-10 18:45:52 -07:00
veth.c	veth: remove redundant call of dev_alloc_name	2013-06-12 01:21:20 -07:00
virtio_net.c	virtio_net: fix race in RX VQ processing	2013-07-09 12:45:37 -07:00
vxlan.c	vxlan: Fix kernel crash on rmmod.	2013-07-11 11:45:36 -07:00
xen-netfront.c	xen: Use more current logging styles	2013-07-01 13:31:25 -07:00