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Date: Fri, 26 Sep 2003 09:15:01 +0200 (CEST)
From: devik <devik@cdi.cz>
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To: Daniel Blueman <daniel.blueman@gmx.net>
cc: <linux-kernel@vger.kernel.org>
Subject: Re: [OOPS] [2.6.0-test5] HTB QoS crash...
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can you send me sch_htb.o ? so I can decode some part of oops
faster. Thanks.

devik

On Thu, 25 Sep 2003, Daniel Blueman wrote:

> I bring my ppp0 interface up, setup various traffic shaping and policing
> filters [1] (Bert Hubert's excellent 'wondershaper').
>
> When I 'killall pppd', the kernel crashes [2].
>
> --- [1]
>
> DOWNLINK=440
> UPLINK=210
> DEV=ppp0
>
> tc qdisc add dev $DEV root handle 1: htb default 20
> tc class add dev $DEV parent 1: classid 1:1 htb rate ${UPLINK}kbit \
>    burst 6k
> tc class add dev $DEV parent 1:1 classid 1:10 htb rate ${UPLINK}kbit \
>    burst 6k prio 1
> tc class add dev $DEV parent 1:1 classid 1:20 htb rate $[9*$UPLINK/10]kbit \
>    burst 6k prio 2
> tc class add dev $DEV parent 1:1 classid 1:30 htb rate $[8*$UPLINK/10]kbit \
>    burst 6k prio 2
> tc qdisc add dev $DEV parent 1:10 handle 10: sfq perturb 10
> tc qdisc add dev $DEV parent 1:20 handle 20: sfq perturb 10
> tc qdisc add dev $DEV parent 1:30 handle 30: sfq perturb 10
> tc filter add dev $DEV parent 1:0 protocol ip prio 10 u32 \
>       match ip tos 0x10 0xff  flowid 1:10
> tc filter add dev $DEV parent 1:0 protocol ip prio 10 u32 \
>         match ip protocol 1 0xff flowid 1:10
> tc filter add dev $DEV parent 1: protocol ip prio 10 u32 \
>    match ip protocol 6 0xff \
>    match u8 0x05 0x0f at 0 \
>    match u16 0x0000 0xffc0 at 2 \
>    match u8 0x10 0xff at 33 \
>    flowid 1:10
> tc filter add dev $DEV parent 1: protocol ip prio 18 u32 \
>    match ip dst 0.0.0.0/0 flowid 1:20
> tc qdisc add dev $DEV handle ffff: ingress
> tc filter add dev $DEV parent ffff: protocol ip prio 50 u32 match ip src \
>    0.0.0.0/0 police rate ${DOWNLINK}kbit burst 10k drop flowid :1
>
> --- [2]
>
> Oops: 0002 [#1]
> CPU:    0
> EIP:    0060:[<c02d2314>]    Not tainted
> EFLAGS: 00010282
> EIP is at htb_unbind_filter+0x49/0x6b
> eax: 00000000   ebx: dc246078   ecx: da60e004   edx: dc246004
> esi: da60e004   edi: df4ffef8   ebp: da5ede0c   esp: da5eddf4
> ds: 007b   es: 007b   ss: 0068
> Process pppd (pid: 1078, threadinfo=da5ec000 task=da711000)
> Stack: c1001040 00000000 c141f280 00000000 df4ffeac db3315fc da5ede20
> c02da54e
>        dc246004 da60e004 00000000 da5ede3c c02da7e7 df4ffef8 df4ffeac
> db3315fc
>        db3315a4 df4ffef8 da5ede58 c02da826 df4ffef8 db3315fc dc2463b0
> db3315a4
> Call Trace:
>  [<c02da54e>] u32_destroy_key+0x6a/0x6c
>  [<c02da7e7>] u32_clear_hnode+0x2e/0x48
>  [<c02da826>] u32_destroy_hnode+0x25/0x86
>  [<c02da955>] u32_destroy+0xce/0xec
>  [<c02d148a>] htb_destroy_filters+0x1d/0x29
>  [<c02d169d>] htb_destroy+0x67/0xd2
>  [<c02c3fd4>] qdisc_destroy+0x81/0x92
>  [<c02c4705>] dev_shutdown+0xaa/0x245
>  [<c0138e4c>] wakeme_after_rcu+0x0/0xc
>  [<c02b7d0c>] unregister_netdevice+0xdb/0x335
>  [<c02bf84a>] rtnl_lock+0x22/0x37
>  [<c0233ba7>] unregister_netdev+0x19/0x26
>  [<c0239e26>] ppp_shutdown_interface+0x21e/0x3ba
>  [<c0182376>] dput+0x23/0x685
>  [<c0163e34>] __fput+0x7c/0xcd
>  [<c0234011>] ppp_release+0x5f/0x61
>  [<c0163e73>] __fput+0xbb/0xcd
>  [<c0161f1d>] filp_close+0x57/0x81
>  [<c016204b>] sys_close+0x104/0x228
>  [<c010a34b>] syscall_call+0x7/0xb
>
> Code: 83 ae 58 01 00 00 01 8b 5d f8 8b 75 fc 89 ec 5d c3 83 ab 3c
>  <0>Kernel panic: Fatal exception in interrupt
> In interrupt handler - not syncing
>
> --
> Daniel J Blueman
>
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