Pravin B Shelar f89e57c4f5 vxlan: Fix kernel crash on rmmod. ... vxlan exit module unregisters vxlan net and then it unregisters rtnl ops which triggers vxlan_dellink() from __rtnl_kill_links(). vxlan_dellink() deletes vxlan-dev from vxlan_list which has list-head in vxlan-net-struct but that is already gone due to net-unregister. That is how we are getting following crash. Following commit fixes the crash by fixing module exit path. BUG: unable to handle kernel paging request at ffff8804102c8000 IP: [<ffffffff812cc5e9>] __list_del_entry+0x29/0xd0 PGD 2972067 PUD 83e019067 PMD 83df97067 PTE 80000004102c8060 Oops: 0000 [#1] SMP DEBUG_PAGEALLOC Modules linked in: --- CPU: 19 PID: 6712 Comm: rmmod Tainted: GF 3.10.0+ #95 Hardware name: Dell Inc. PowerEdge R620/0KCKR5, BIOS 1.4.8 10/25/2012 task: ffff88080c47c580 ti: ffff88080ac50000 task.ti: ffff88080ac50000 RIP: 0010:[<ffffffff812cc5e9>] [<ffffffff812cc5e9>] __list_del_entry+0x29/0xd0 RSP: 0018:ffff88080ac51e08 EFLAGS: 00010206 RAX: ffff8804102c8000 RBX: ffff88040f0d4b10 RCX: dead000000200200 RDX: ffff8804102c8000 RSI: ffff88080ac51e58 RDI: ffff88040f0d4b10 RBP: ffff88080ac51e08 R08: 0000000000000001 R09: 2222222222222222 R10: 2222222222222222 R11: 2222222222222222 R12: ffff88080ac51e58 R13: ffffffffa07b8840 R14: ffffffff81ae48c0 R15: ffff88080ac51e58 FS: 00007f9ef105c700(0000) GS:ffff88082a800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: ffff8804102c8000 CR3: 00000008227e5000 CR4: 00000000000407e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Stack: ffff88080ac51e28 ffffffff812cc6a1 2222222222222222 ffff88040f0d4000 ffff88080ac51e48 ffffffffa07b3311 ffff88040f0d4000 ffffffff81ae49c8 ffff88080ac51e98 ffffffff81492fc2 ffff88080ac51e58 ffff88080ac51e58 Call Trace: [<ffffffff812cc6a1>] list_del+0x11/0x40 [<ffffffffa07b3311>] vxlan_dellink+0x51/0x70 [vxlan] [<ffffffff81492fc2>] __rtnl_link_unregister+0xa2/0xb0 [<ffffffff8149448e>] rtnl_link_unregister+0x1e/0x30 [<ffffffffa07b7b7c>] vxlan_cleanup_module+0x1c/0x2f [vxlan] [<ffffffff810c9b31>] SyS_delete_module+0x1d1/0x2c0 [<ffffffff812b8a0e>] ? trace_hardirqs_on_thunk+0x3a/0x3f [<ffffffff81582f42>] system_call_fastpath+0x16/0x1b Code: eb 9f 55 48 8b 17 48 b9 00 01 10 00 00 00 ad de 48 8b 47 08 48 89 e5 48 39 ca 74 29 48 b9 00 02 20 00 00 00 ad de 48 39 c8 74 7a <4c> 8b 00 4c 39 c7 75 53 4c 8b 42 08 4c 39 c7 75 2b 48 89 42 08 RIP [<ffffffff812cc5e9>] __list_del_entry+0x29/0xd0 RSP <ffff88080ac51e08> CR2: ffff8804102c8000 Signed-off-by: Pravin B Shelar <pshelar@nicira.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2013-07-11 11:45:36 -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	sh_eth: SH_ETH should depend on HAS_DMA	2013-07-10 19:47:14 -07:00
fddi	net/fddi/skfp/skfddi: Use module_pci_driver to register driver	2013-05-22 14:35:05 -07:00
hamradio	net: pass info struct via netdevice notifier	2013-05-28 13:11:01 -07:00
hippi	net/hippi/rrunner: Use module_pci_driver to register driver	2013-05-22 14:35:05 -07:00
hyperv	Fix the VLAN_TAG_PRESENT in netvsc_recv_callback()	2013-06-17 15:58:11 -07:00
ieee802154
irda	net: irda: remove unnecessary platform_set_drvdata()	2013-05-27 22:34:51 -07:00
phy	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next	2013-07-09 18:24:39 -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
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	ntb_netdev: remove from list on exit	2013-05-15 10:58:14 -07:00
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