Re: 2.6.11-rc3 BUG: using smp_processor_id() in preemptible [00000001]code: ip/6840

[Matthias-Christian Ott]

Frank van Maarseveen wrote:

> While executing
> iptables -t nat -D OUTPUT -d 80.126.170.174 -p tcp --dport https -j DNAT --to 192.168.0.1
> iptables -t nat -D OUTPUT -d 80.126.170.174 -p tcp --dport http  -j DNAT --to 192.168.0.1
> ip route del default
> ip addr del 80.126.170.174 dev eth0
>
> on a dual PIII during a shutdown:
>
> kernel: BUG: using smp_processor_id() in preemptible [00000001] code: ip/6840
> kernel: caller is get_next_corpse+0x13/0x260
> kernel:  [<c010385e>] dump_stack+0x1e/0x30
> kernel:  [<c024f13f>] smp_processor_id+0xaf/0xc0
> kernel:  [<c0407d83>] get_next_corpse+0x13/0x260
> kernel:  [<c0408006>] ip_ct_iterate_cleanup+0x36/0xc0
> kernel:  [<c041896a>] masq_inet_event+0x3a/0x70
> kernel:  [<c012eded>] notifier_call_chain+0x2d/0x50
> kernel:  [<c03ef589>] inet_del_ifa+0x99/0x150
> kernel:  [<c03efafb>] inet_rtm_deladdr+0x12b/0x170
> kernel:  [<c03b1f47>] rtnetlink_rcv+0x347/0x410
> kernel:  [<c03c1b10>] netlink_data_ready+0x60/0x70
> kernel:  [<c03c0f71>] netlink_sendskb+0x31/0x60
> kernel:  [<c03c17e9>] netlink_sendmsg+0x259/0x310
> kernel:  [<c039e87b>] sock_sendmsg+0xbb/0xe0
> kernel:  [<c03a0424>] sys_sendmsg+0x1c4/0x230
> kernel:  [<c03a08cc>] sys_socketcall+0x21c/0x240
> kernel:  [<c01029f3>] syscall_call+0x7/0xb
> kernel: BUG: using smp_processor_id() in preemptible [00000001] code: ip/6840
> kernel: caller is get_next_corpse+0x23f/0x260
> kernel:  [<c010385e>] dump_stack+0x1e/0x30
> kernel:  [<c024f13f>] smp_processor_id+0xaf/0xc0
> kernel:  [<c0407faf>] get_next_corpse+0x23f/0x260
> kernel:  [<c0408006>] ip_ct_iterate_cleanup+0x36/0xc0
> kernel:  [<c041896a>] masq_inet_event+0x3a/0x70
> kernel:  [<c012eded>] notifier_call_chain+0x2d/0x50
> kernel:  [<c03ef589>] inet_del_ifa+0x99/0x150
> kernel:  [<c03efafb>] inet_rtm_deladdr+0x12b/0x170
> kernel:  [<c03b1f47>] rtnetlink_rcv+0x347/0x410
> kernel:  [<c03c1b10>] netlink_data_ready+0x60/0x70
> kernel:  [<c03c0f71>] netlink_sendskb+0x31/0x60
> kernel:  [<c03c17e9>] netlink_sendmsg+0x259/0x310
> kernel:  [<c039e87b>] sock_sendmsg+0xbb/0xe0
> kernel:  [<c03a0424>] sys_sendmsg+0x1c4/0x230
> kernel:  [<c03a08cc>] sys_socketcall+0x21c/0x240
> kernel:  [<c01029f3>] syscall_call+0x7/0xb
>
>  
Hi!
You have to use get_cpu() or __smp_processor_id() to avoid this debug 
message.
Have a look at inlcude/linux/smp.h and include/asm-i386/smp.h.

Matthias-Christian Ott
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