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Date: Mon, 03 Sep 2007 00:18:11 +0400
From: slavon@...telecom.ru
To: slavon@...telecom.ru
Cc: netdev@...r.kernel.org
Subject: Re: potentially kernel panic on lib/rbtree.c
Hm...
Not good.
After patch NETCONSOLE log:
---- THERE MANY MESSAGES LIKE DOWN ----
[16038.677029] WARNING: at net/sched/sch_htb.c:362 htb_safe_rb_erase()
[16038.677031] [<f8862a45>] htb_dequeue+0x13d/0x6d2 [sch_htb]
[16038.677038] [<c02a71af>] __qdisc_run+0x2a/0x16b
[16038.677043] [<c029cfc1>] dev_queue_xmit+0x18b/0x2a6
[16038.677048] [<c02b94e3>] ip_output+0x281/0x2ba
[16038.677054] [<c02b571c>] ip_forward_finish+0x0/0x2e
[16038.677059] [<c02b59b5>] ip_forward+0x26b/0x2c6
[16038.677064] [<c02b571c>] ip_forward_finish+0x0/0x2e
[16038.677070] [<c02b4729>] ip_rcv+0x484/0x4bd
[16038.677075] [<c029750b>] __netdev_alloc_skb+0x1c/0x35
[16038.677081] [<c029ab9c>] netif_receive_skb+0x2cd/0x340
[16038.677086] [<c0234ef1>] e1000_clean_rx_irq+0x379/0x448
[16038.677092] [<c0234b78>] e1000_clean_rx_irq+0x0/0x448
[16038.677097] [<c0233f8f>] e1000_clean+0x7a/0x249
[16038.677103] [<c029ccad>] net_rx_action+0x91/0x17f
[16038.677108] [<c01225e2>] __do_softirq+0x5d/0xc1
[16038.677114] [<c0122678>] do_softirq+0x32/0x36
[16038.677118] [<c010488a>] do_IRQ+0x7e/0x90
[16038.677123] [<c0111619>] smp_apic_timer_interrupt+0x74/0x80
[16038.677128] [<c02ea9d5>] __sched_text_start+0x54d/0x5ba
[16038.677134] [<c0100d65>] mwait_idle+0x0/0xa
[16038.677139] [<c01032eb>] common_interrupt+0x23/0x28
[16038.677144] [<c0100d61>] mwait_idle_with_hints+0x3b/0x3f
[16038.677149] [<c0100d65>] mwait_idle+0x0/0xa
[16038.677154] [<c0100ea4>] cpu_idle+0x91/0xaa
[16038.677159] =======================
[16038.677161] WARNING: at net/sched/sch_htb.c:362 htb_safe_rb_erase()
[16038.677163] [<f8862a45>] htb_dequeue+0x13d/0x6d2 [sch_htb]
[16038.677170] [<c02a71af>] __qdisc_run+0x2a/0x16b
[16038.677175] [<c029cfc1>] dev_queue_xmit+0x18b/0x2a6
[16038.677180] [<c02b94e3>] ip_output+0x281/0x2ba
[16038.677185] [<c02b571c>] ip_forward_finish+0x0/0x2e
[16038.677191] [<c02b59b5>] ip_forward+0x26b/0x2c6
[16038.677196] [<c02b571c>] ip_forward_finish+0x0/0x2e
[16038.677202] [<c02b4729>] ip_rcv+0x484/0x4bd
[16038.677207] [<c029750b>] __netdev_alloc_skb+0x1c/0x35
[16038.677212] [<c029ab9c>] netif_receive_skb+0x2cd/0x340
[16038.677218] [<c0234ef1>] e1000_clean_rx_irq+0x379/0x448
[16038.677224] [<c0234b78>] e1000_clean_rx_irq+0x0/0x448
[16038.677229] [<c0233f8f>] e1000_clean+0x7a/0x249
[16038.677234] [<c029ccad>] net_rx_action+0x91/0x17f
[16038.677240] [<c01225e2>] __do_softirq+0x5d/0xc1
[16038.677245] [<c0122678>] do_softirq+0x32/0x36
[16038.677250] [<c010488a>] do_IRQ+0x7e/0x90
[16038.677255] [<c0111619>] smp_apic_timer_interrupt+0x74/0x80
[16038.677260] [<c02ea9d5>] __sched_text_start+0x54d/0x5ba
[16038.677266] [<c0100d65>] mwait_idle+0x0/0xa
[16038.677270] [<c01032eb>] common_interrupt+0x23/0x28
[16038.677276] [<c0100d61>] mwait_idle_with_hints+0x3b/0x3f
[16038.677281] [<c0100d65>] mwait_idle+0x0/0xa
[16038.677285] [<c0100ea4>] cpu_idle+0x91/0xaa
[16038.677290] =======================
[16038.677293] WARNING: at net/sched/sch_htb.c:362 htb_safe_rb_erase()
[16038.677295] [<f8862a45>] htb_dequeue+0x13d/0x6d2 [sch_htb]
[16038.677301] [<c02a71af>] __qdisc_run+0x2a/0x16b
[16038.677306] [<c029cfc1>] dev_queue_xmit+0x18b/0x2a6
[16038.677312] [<c02b94e3>] ip_output+0x281/0x2ba
[16038.677317] [<c02b571c>] ip_forward_finish+0x0/0x2e
[16038.677323] [<c02b59b5>] ip_forward+0x26b/0x2c6
[16038.677328] [<c02b571c>] ip_forward_finish+0x0/0x2e
[16038.677333] [<c02b4729>] ip_rcv+0x484/0x4bd
[16038.677339] [<c029750b>] __netdev_alloc_skb+0x1c/0x35
[16038.677344] [<c029ab9c>] netif_receive_skb+0x2cd/0x340
[16038.677350] [<c0234ef1>] e1000_clean_rx_irq+0x379/0x448
[16038.677356] [<c0234b78>] e1000_clean_rx_irq+0x0/0x448
[16038.677361] [<c0233f8f>] e1000_clean+0x7a/0x249
[16038.677366] [<c029ccad>] net_rx_action+0x91/0x17f
[16038.677372] [<c01225e2>] __do_softirq+0x5d/0xc1
[16038.677377] [<c0122678>] do_softirq+0x32/0x36
[16038.677382] [<c010488a>] do_IRQ+0x7e/0x90
[16038.677387] [<c0111619>] smp_apic_timer_interrupt+0x74/0x80
[16038.677393] [<c02ea9d5>] __sched_text_start+0x54d/0x5ba
[16038.677398] [<c0100d65>] mwait_idle+0x0/0xa
[16038.677403] [<c01032eb>] common_interrupt+0x23/0x28
[16038.677408] [<c0100d61>] mwait_idle_with_hints+0x3b/0x3f
[16038.677413] [<c0100d65>] mwait_idle+0x0/0xa
[16038.677417] [<c0100ea4>] cpu_idle+0x91/0xaa
[16038.677422] =======================
[16038.677425] WARNING: at net/sched/sch_htb.c:362 htb_safe_rb_erase()
[16038.677427] [<f8862a45>] htb_dequeue+0x13d/0x6d2 [sch_htb]
[16038.677433] [<c02a71af>] __qdisc_run+0x2a/0x16b
[16038.677439] [<c029cfc1>] dev_queue_xmit+0x18b/0x2a6
[16038.677444] [<c02b94e3>] ip_output+0x281/0x2ba
[16038.677450] [<c02b571c>] ip_forward_finish+0x0/0x2e
[16038.677455] [<c02b59b5>] ip_forward+0x26b/0x2c6
[16038.677460] [<c02b571c>] ip_forward_finish+0x0/0x2e
[16038.677466] [<c02b4729>] ip_rcv+0x484/0x4bd
[16038.677471] [<c029750b>] __netdev_alloc_skb+0x1c/0x35
[16038.677476] [<c029ab9c>] netif_receive_skb+0x2cd/0x340
[16038.677482] [<c0234ef1>] e1000_clean_rx_irq+0x379/0x448
[16038.677488] [<c0234b78>] e1000_clean_rx_irq+0x0/0x448
[16038.677493] [<c0233f8f>] e1000_clean+0x7a/0x249
[16038.677498] [<c029ccad>] net_rx_action+0x91/0x17f
[16038.677504] [<c01225e2>] __do_softirq+0x5d/0xc1
[16038.677509] [<c0122678>] do_softirq+0x32/0x36
[16038.677514] [<c010488a>] do_IRQ+0x7e/0x90
[16038.677519] [<c0111619>] smp_apic_timer_interrupt+0x74/0x80
[16038.677524] [<c02ea9d5>] __sched_text_start+0x54d/0x5ba
[16038.677530] [<c0100d65>] mwait_idle+0x0/0xa
[16038.677534] [<c01032eb>] common_interrupt+0x23/0x28
[16038.677540] [<c0100d61>] mwait_idle_with_hints+0x3b/0x3f
[16038.677545] [<c0100d65>] mwait_idle+0x0/0xa
[16038.677551] [<c0100ea4>] cpu_idle+0x91/0xaa
[16038.677556] =======================
[16038.677558] WARNING: at net/sched/sch_htb.c:362 htb_safe_rb_erase()
[16038.677560] [<f8862a45>] htb_dequeue+0x13d/0x6d2 [sch_htb]
[16038.677567] [<c02a71af>] __qdisc_run+0x2a/0x16b
[16038.677573] [<c029cfc1>] dev_queue_xmit+0x18b/0x2a6
[16038.677578] [<c02b94e3>] ip_output+0x281/0x2ba
[16038.677583] [<c02b571c>] ip_forward_finish+0x0/0x2e
[16038.677589] [<c02b59b5>] ip_forward+0x26b/0x2c6
[16038.677594] [<c02b571c>] ip_forward_finish+0x0/0x2e
[16038.677599] [<c02b4729>] ip_rcv+0x484/0x4bd
--- SYSTEM IS REBOOT ---
now i try "return"
lib/rbtree.c:80
+if (gparent == NULL){
+ WARN_ON(1);
+ return;
+}
maybe "continue" not good idea....
> Sorry for prev. send =(
>
> Hi all. Have some time panic from sch_htb.c
>
> I see to gdb and see that panic at lib/rbtree.c:80
> gparent == NULL
>
> maybe add lines like this before IF
>
> if (gparent == NULL){
> WARN_ON(1);
> // MAYBE need remove parrent that not have gparent at this place? But i
> think that maybe its not have gparent becouse its lock? No so deep
> look code.
> continue;
> }
>
> Thanks
>
>
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