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On Thu, Aug 07, 2008 at 04:43:37PM +0200, Julius Volz wrote:
> This is the third iteration of the IPVS Netlink interface, this time
> with only a small fix for a typo found by Thomas Graf. If there are no
> further major issues, can this be applied?
>
> The two patches add a Generic Netlink interface to IPVS while keeping
> the old get/setsockopt interface for userspace backwards compatibility.
> The motivation for this is to have a more extensible interface for
> future changes, such as the planned IPv6 support.
>
> An ipvsadm that already uses the new interface is available here:
>
> http://sixpak.org/vince/google/ipvsadm/
> (by Vince Busam)
>
> Old ipvsadms continue to work with this change.
Hi Julius,
these patches seem fine to me, however I am still seeing an oops
when using the new ipvsadm. Are we sure that this bug is in generic
code?
# ipvsadm -A -t 10.4.0.132:80
# ipvsadm -C
BUG: unable to handle kernel NULL pointer dereference at 00000028
IP: [<c021f034>] ip_vs_genl_set_cmd+0x254/0x494
*pde = 00000000
Oops: 0000 [#1]
Pid: 33, comm: ipvsadm Not tainted (2.6.27-rc2-kexec-11901-ge6fce5b-dirty #13)
EIP: 0060:[<c021f034>] EFLAGS: 00000206 CPU: 0
EIP is at ip_vs_genl_set_cmd+0x254/0x494
EAX: 00000014 EBX: 00000000 ECX: c7401300 EDX: c02e3018
ESI: 00000000 EDI: 00000011 EBP: c746dce4 ESP: c746dc20
DS: 007b ES: 007b FS: 0000 GS: 0033 SS: 0068
Process ipvsadm (pid: 33, ti=c746c000 task=c6f22700 task.ti=c746c000)
Stack: 00000021 c0289340 c0289364 c0289374 c6faf088 00001102 c6faf0b4 c6faf058
00000003 c0289340 00000001 00000000 c02e0968 c01e948e 00000002 c6feb960
00000001 c6f84160 c6feb960 00000010 00000000 00000246 c01e4c57 00000246
Call Trace:
[<c01e948e>] ctrl_dumpfamily+0x86/0xd4
[<c01e4c57>] sk_filter+0x67/0x7c
[<c01e693d>] netlink_dump+0x15d/0x1a4
[<c01e9858>] genl_rcv_msg+0x1dc/0x204
[<c01e967c>] genl_rcv_msg+0x0/0x204
[<c01e89d2>] netlink_rcv_skb+0x72/0x80
[<c01e9671>] genl_rcv+0x19/0x24
[<c01e84d2>] netlink_unicast+0x232/0x284
[<c01e86dd>] netlink_sendmsg+0x1b9/0x288
[<c01d0d3b>] sock_sendmsg+0xb7/0xe0
[<c0120adc>] autoremove_wake_function+0x0/0x30
[<c0120adc>] autoremove_wake_function+0x0/0x30
[<c013a383>] __do_fault+0x15b/0x340
[<c01d7832>] verify_iovec+0x2a/0x88
[<c01d0e9f>] sys_sendmsg+0x13b/0x230
[<c01d184a>] sys_recvmsg+0x1b6/0x240
[<c01d1665>] move_addr_to_user+0x45/0x74
[<c01d1b50>] sys_getsockname+0x94/0xa0
[<c01d2a09>] release_sock+0x9/0x70
[<c01d3bca>] sock_setsockopt+0x106/0x638
[<c01d0a41>] sock_attach_fd+0x65/0xa0
[<c01d1e88>] sys_socketcall+0x80/0x1d8
[<c0103d42>] syscall_call+0x7/0xb
=======================
Code: 8b 40 04 89 44 24 1c 8b 47 18 85 c0 74 07 8b 40 04 89 44 24 20 8d 44 24
18 e8 09 ca ff ff 89 c3 8b 84 24 88 00 00 00 85 c0 74 03 <ff> 48 14 b8 f0 90 28
c0 e8 e3 a5 00 00 89 d8 81 c4 8c 00 00 00
EIP: [<c021f034>] ip_vs_genl_set_cmd+0x254/0x494 SS:ESP 0068:c746dc20
---[ end trace d371c2e324a230e1 ]---
Segmentation fault
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