Alexey Dobriyan wrote:
As was suspected, it's oopsable:
BUG: unable to handle kernel paging request at 0000000000100100 <===
IP: [<ffffffffa00984bc>] nf_conntrack_helper_unregister+0x137/0x16c [nf_conntrack]
PGD 168b48067 PUD 168b47067 PMD 0
Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
last sysfs file: /sys/kernel/uevent_seqnum
CPU 0
Modules linked in: nf_conntrack_pptp(-) nf_conntrack_proto_gre af_packet iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 iptable_filter ip_tables xt_tcpudp ip6table_filter ip6_tables x_tables ipv6 sr_mod cdrom [last unloaded: nf_conntrack_pptp]
Pid: 9110, comm: rmmod Not tainted 2.6.28-rc2-netns-xfrm #2
RIP: 0010:[<ffffffffa00984bc>] [<ffffffffa00984bc>] nf_conntrack_helper_unregister+0x137/0x16c [nf_conntrack]
RSP: 0018:ffff8801689dfea8 EFLAGS: 00010212
RAX: 0000000000004000 RBX: 0000000000000000 RCX: 0000000000000033
RDX: 0000000000003fff RSI: ffffffffa0648720 RDI: ffff88017fc2ced8
RBP: ffff8801689dfed8 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000000 R11: ffff8801689dfd98 R12: 00000000001000f8
R13: ffffffffa0648720 R14: 0000000000004000 R15: 0000000000000880
FS: 00007f7ba894d6f0(0000) GS:ffffffff80521580(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 0000000000100100 CR3: 0000000168b45000 CR4: 00000000000006e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process rmmod (pid: 9110, threadinfo ffff8801689de000, task ffff88017cd81218)
Stack:
ffff8801689dfed8 ffffffffa06487c0 0000000000000000 0000000000000880
00007fffb0955330 0000000000000880 ffff8801689dfee8 ffffffffa064771c
ffff8801689dff78 ffffffff80253f87 746e6e6f635f666e 7470705f6b636172
Call Trace:
[<ffffffffa064771c>] nf_conntrack_pptp_fini+0x10/0x1e [nf_conntrack_pptp]
[<ffffffff80253f87>] sys_delete_module+0x19f/0x1fe
[<ffffffff8024cac8>] ? trace_hardirqs_on_caller+0xf0/0x114
[<ffffffff803ea8b0>] ? trace_hardirqs_on_thunk+0x3a/0x3f
[<ffffffff8020b52b>] system_call_fastpath+0x16/0x1b
Code: 48 89 df 4c 89 ee 0f 18 08 e8 64 fe ff ff 48 8b 1b eb e5 49 ff c6 44 3b 35 4a bc 00 00 44 89 f0 72 c8 4d 8b 64 24 08 49 83 ec 08 <49> 8b 44 24 08 0f 18 08 49 8d 44 24 08 48 3d 60 4f 50 80 74 08
RIP [<ffffffffa00984bc>] nf_conntrack_helper_unregister+0x137/0x16c [nf_conntrack]
RSP <ffff8801689dfea8>
CR2: 0000000000100100
Kernel panic - not syncing: Fatal exception in interrupt
This doesn't explain the problem. *How* is it oopsable?
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