Yang Hongyang 3705e11a21 ipv6: fix an oops when force unload ipv6 module ... When I do an ipv6 module force unload,I got the following oops: #rmmod -f ipv6 ------------[ cut here ]------------ kernel BUG at mm/slub.c:2969! invalid opcode: 0000 [#1] SMP last sysfs file: /sys/devices/pci0000:00/0000:00:11.0/0000:02:03.0/net/eth2/ifindex Modules linked in: ipv6(-) dm_multipath uinput ppdev tpm_tis tpm tpm_bios pcspkr pcnet32 mii parport_pc i2c_piix4 parport i2c_core floppy mptspi mptscsih mptbase scsi_transport_spi Pid: 2530, comm: rmmod Tainted: G R 2.6.32 #2 440BX Desktop Reference Platform/VMware Virtual Platform EIP: 0060:[<c04b73f2>] EFLAGS: 00010246 CPU: 0 EIP is at kfree+0x6a/0xdd EAX: 00000000 EBX: c09e86bc ECX: c043e4dd EDX: c14293e0 ESI: e141f1d8 EDI: e140fc31 EBP: dec58ef0 ESP: dec58ed0 DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 Process rmmod (pid: 2530, ti=dec58000 task=decb1940 task.ti=dec58000) Stack: c14293e0 00000282 df624240 c0897d08 c09e86bc c09e86bc e141f1d8 dec58f1c <0> dec58f00 e140fc31 c09e84c4 e141f1bc dec58f14 c0689d21 dec58f1c e141f1bc <0> 00000000 dec58f2c c0689eff c09e84d8 c09e84d8 e141f1bc bff33a90 dec58f38 Call Trace: [<e140fc31>] ? ipv6_frags_exit_net+0x22/0x32 [ipv6] [<c0689d21>] ? ops_exit_list+0x19/0x3d [<c0689eff>] ? unregister_pernet_operations+0x2a/0x51 [<c0689f70>] ? unregister_pernet_subsys+0x17/0x24 [<e140fbfe>] ? ipv6_frag_exit+0x21/0x32 [ipv6] [<e141a361>] ? inet6_exit+0x47/0x122 [ipv6] [<c045f5de>] ? sys_delete_module+0x198/0x1f6 [<c04a8acf>] ? remove_vma+0x57/0x5d [<c070f63f>] ? do_page_fault+0x2e7/0x315 [<c0403218>] ? sysenter_do_call+0x12/0x28 Code: 86 00 00 00 40 c1 e8 0c c1 e0 05 01 d0 89 45 e0 66 83 38 00 79 06 8b 40 0c 89 45 e0 8b 55 e0 8b 02 84 c0 78 14 66 a9 00 c0 75 04 <0f> 0b eb fe 8b 45 e0 e8 35 15 fe ff eb 5d 8b 45 04 8b 55 e0 89 EIP: [<c04b73f2>] kfree+0x6a/0xdd SS:ESP 0068:dec58ed0 ---[ end trace 4475d1a5b0afa7e5 ]--- It's because in ip6_frags_ns_sysctl_register, "table" only alloced when "net" is not equals to "init_net".So when we free "table" in ip6_frags_ns_sysctl_unregister,we should check this first. This patch fix the problem. Signed-off-by: Yang Hongyang <yanghy@cn.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2009-12-18 20:25:13 -08:00
..
netfilter	netfilter: fix crashes in bridge netfilter caused by fragment jumps	2009-12-15 16:59:59 +01:00
addrconf_core.c
addrconf.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6	2009-12-08 07:55:01 -08:00
addrlabel.c
af_inet6.c	net: check kern before calling security subsystem	2009-11-05 22:18:18 -08:00
ah6.c	xfrm: Use the user specified truncation length in ESP and AH	2009-11-25 15:48:41 -08:00
anycast.c	ipv6: use RCU to walk list of network devices	2009-11-13 20:38:49 -08:00
datagram.c	ipv6: no more dev_put() in datagram_send_ctl()	2009-11-02 03:42:41 -08:00
esp6.c	xfrm: Use the user specified truncation length in ESP and AH	2009-11-25 15:48:41 -08:00
exthdrs_core.c
exthdrs.c
fib6_rules.c	net: Allow fib_rule_unregister to batch	2009-12-03 12:22:55 -08:00
icmp.c	sysctl net: Remove unused binary sysctl code	2009-11-12 02:05:06 -08:00
inet6_connection_sock.c
inet6_hashtables.c	tcp: Fix a connect() race with timewait sockets	2009-12-08 20:17:51 -08:00
ip6_fib.c
ip6_flowlabel.c	net: use net_eq to compare nets	2009-11-25 15:14:13 -08:00
ip6_input.c
ip6_output.c
ip6_tunnel.c	net: Simplify ip6_tunnel pernet operations.	2009-12-01 16:15:59 -08:00
ip6mr.c
ipcomp6.c
ipv6_sockglue.c
Kconfig
Makefile
mcast.c	ipv6: use RCU to walk list of network devices	2009-11-13 20:38:49 -08:00
mip6.c
ndisc.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6	2009-12-08 07:55:01 -08:00
netfilter.c
proc.c
protocol.c
raw.c	ipv6: avoid dev_hold()/dev_put() in rawv6_bind()	2009-11-08 00:43:18 -08:00
reassembly.c	ipv6: fix an oops when force unload ipv6 module	2009-12-18 20:25:13 -08:00
route.c	netns: fix net.ipv6.route.gc_min_interval_ms in netns	2009-12-18 20:11:03 -08:00
sit.c	net: Simplify ipip6 aka sit pernet operations.	2009-12-01 16:15:59 -08:00
syncookies.c	tcp: Revert per-route SACK/DSACK/TIMESTAMP changes.	2009-12-15 20:56:42 -08:00
sysctl_net_ipv6.c	sysctl net: Remove unused binary sysctl code	2009-11-12 02:05:06 -08:00
tcp_ipv6.c	tcp: Revert per-route SACK/DSACK/TIMESTAMP changes.	2009-12-15 20:56:42 -08:00
tunnel6.c
udp_impl.h
udp.c	IPv6: use ipv6_addr_v4mapped()	2009-11-10 20:54:44 -08:00
udplite.c	net: drop capability from protocol definitions	2009-11-05 21:40:17 -08:00
xfrm6_input.c
xfrm6_mode_beet.c
xfrm6_mode_ro.c
xfrm6_mode_transport.c
xfrm6_mode_tunnel.c
xfrm6_output.c
xfrm6_policy.c	sysctl net: Remove unused binary sysctl code	2009-11-12 02:05:06 -08:00
xfrm6_state.c
xfrm6_tunnel.c