From: Martin Townsend <martin.townsend@xsilon.com>
To: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Cc: linux-bluetooth@vger.kernel.org, linux-wpan@vger.kernel.org,
marcel@holtmann.org, alex.aring@gmail.com
Subject: Re: [PATCH bluetooth-next] 6lowpan: Use pskb_expand_head in IPHC decompression.
Date: Wed, 08 Oct 2014 12:07:32 +0100 [thread overview]
Message-ID: <54351AF4.5060907@xsilon.com> (raw)
In-Reply-To: <1412763863.2705.22.camel@jrissane-mobl.ger.corp.intel.com>
Hi Jukka,
And there's no oops when kmemleak is activated on a kernel without the patch?
- Martin.
On 08/10/14 11:24, Jukka Rissanen wrote:
> Hi Martin,
>
> tried to v2 of the patch and still see oops but not with the locking at
> this time. I had kmemleak activated in my kernel in this run.
>
> On ti, 2014-10-07 at 16:37 +0100, Martin Townsend wrote:
>> I should also mention this has only been compile tested as I currently don't have a way of testing it easily. So I would appreciate any testing on real HW.
>>
>> Jukka, I would be very interested to see if you see that locking error message you were seeing previously.
>>
>> - Martin.
>>
>
> [ 243.774232] kmemleak: Cannot insert 0xf45bde40 into the object search
> tree (overlaps existing)
> [ 243.775060] CPU: 0 PID: 0 Comm: swapper/0 Not tainted
> 3.17.0-rc1-bt6lowpan #1
> [ 243.775060] Hardware name: innotek GmbH VirtualBox/VirtualBox, BIOS
> VirtualBox 12/01/2006
> [ 243.775060] f45bde40 00000000 f600bb74 c18821c1 e716a0c8 f600bba8
> c116abac c1ae324c
> [ 243.775060] f45bde40 00200282 e716a0f4 00000010 00000010 e716a134
> 00000000 f45bde40
> [ 243.775060] f6001c00 f6001c00 f600bbd4 c187f10c 00000020 f600bbd4
> 00200246 f47805c0
> [ 243.775060] Call Trace:
> [ 243.775060] [<c18821c1>] dump_stack+0x4b/0x75
> [ 243.775060] [<c116abac>] create_object+0x22c/0x280
> [ 243.775060] [<c187f10c>] kmemleak_alloc+0x3c/0xb0
> [ 243.775060] [<c115e693>] kmem_cache_alloc+0x1a3/0x290
> [ 243.775060] [<c1761ea0>] ? skb_clone+0x40/0xa0
> [ 243.775060] [<c1761ea0>] skb_clone+0x40/0xa0
> [ 243.775060] [<c179a15b>] netlink_broadcast_filtered+0x25b/0x310
> [ 243.775060] [<c179a23e>] netlink_broadcast+0x2e/0x40
> [ 243.775060] [<c179c68e>] nlmsg_notify+0xbe/0xd0
> [ 243.775060] [<c178064f>] rtnl_notify+0x3f/0x60
> [ 243.775060] [<c1828382>] inet6_rt_notify+0xe2/0x150
> [ 243.775060] [<c182a228>] fib6_add+0x388/0x7c0
> [ 243.775060] [<c1825533>] ip6_ins_rt+0x53/0x70
> [ 243.775060] [<c1825828>] ip6_pol_route.isra.42+0x2d8/0x3e0
> [ 243.775060] [<c1825963>] ip6_pol_route_input+0x33/0x40
> [ 243.775060] [<c1825930>] ? ip6_pol_route.isra.42+0x3e0/0x3e0
> [ 243.775060] [<c184aba9>] fib6_rule_action+0x79/0x1a0
> [ 243.775060] [<c178d0a7>] fib_rules_lookup+0x117/0x1a0
> [ 243.775060] [<c178cf90>] ? fib_rules_net_init+0x30/0x30
> [ 243.775060] [<c184aedb>] fib6_rule_lookup+0x3b/0x70
> [ 243.775060] [<c1825930>] ? ip6_pol_route.isra.42+0x3e0/0x3e0
> [ 243.775060] [<c1825106>] ip6_route_input_lookup.isra.39+0x46/0x50
> [ 243.775060] [<c1825930>] ? ip6_pol_route.isra.42+0x3e0/0x3e0
> [ 243.775060] [<c1825a4d>] ip6_route_input+0x9d/0xb0
> [ 243.775060] [<c18187f7>] ip6_rcv_finish+0x147/0x1d0
> [ 243.775060] [<c18197c6>] ipv6_rcv+0x686/0xa10
> [ 243.775060] [<c17716cb>] ? __netif_receive_skb_core+0x4ab/0x7b0
> [ 243.775060] [<c17716cb>] __netif_receive_skb_core+0x4ab/0x7b0
> [ 243.775060] [<c1771279>] ? __netif_receive_skb_core+0x59/0x7b0
> [ 243.775060] [<c17719eb>] __netif_receive_skb+0x1b/0x70
> [ 243.775060] [<c177300f>] process_backlog+0x9f/0x140
> [ 243.775060] [<c1772e48>] net_rx_action+0x128/0x250
> [ 243.775060] [<c104fd84>] __do_softirq+0xd4/0x300
> [ 243.775060] [<c104fcb0>] ? __local_bh_enable_ip+0xf0/0xf0
> [ 243.775060] [<c10049fc>] do_softirq_own_stack+0x2c/0x40
> [ 243.775060] <IRQ> [<c1050136>] irq_exit+0x86/0xb0
> [ 243.775060] [<c188bd98>] smp_apic_timer_interrupt+0x38/0x50
> [ 243.775060] [<c188b6ce>] apic_timer_interrupt+0x32/0x38
> [ 243.775060] [<c107007b>] ? resched_cpu+0x7b/0x80
> [ 243.775060] [<c10be4ea>] ? tick_nohz_idle_enter+0x4a/0x80
> [ 243.775060] [<c10848d5>] cpu_startup_entry+0x35/0x370
> [ 243.775060] [<c10718bb>] ? preempt_count_add+0x4b/0xa0
> [ 243.775060] [<c187dbd1>] rest_init+0xa1/0xb0
> [ 243.775060] [<c1c93aa1>] start_kernel+0x386/0x38b
> [ 243.775060] [<c1c932ab>] i386_start_kernel+0x79/0x7d
> [ 243.775060] kmemleak: Kernel memory leak detector disabled
> [ 243.775060] kmemleak: Object 0xf45bde40 (size 192):
> [ 243.775060] kmemleak: comm "softirq", pid 0, jiffies 4294911070
> [ 243.775060] kmemleak: min_count = 1
> [ 243.775060] kmemleak: count = 0
> [ 243.775060] kmemleak: flags = 0x1
> [ 243.775060] kmemleak: checksum = 0
> [ 243.775060] kmemleak: backtrace:
> [ 243.775060] [<c187f10c>] kmemleak_alloc+0x3c/0xb0
> [ 243.775060] [<c115e693>] kmem_cache_alloc+0x1a3/0x290
> [ 243.775060] [<c17635e1>] __alloc_skb+0x41/0x1c0
> [ 243.775060] [<c18282f5>] inet6_rt_notify+0x55/0x150
> [ 243.775060] [<c182a228>] fib6_add+0x388/0x7c0
> [ 243.775060] [<c1825533>] ip6_ins_rt+0x53/0x70
> [ 243.775060] [<c1825828>] ip6_pol_route.isra.42+0x2d8/0x3e0
> [ 243.775060] [<c1825963>] ip6_pol_route_input+0x33/0x40
> [ 243.775060] [<c184aba9>] fib6_rule_action+0x79/0x1a0
> [ 243.775060] [<c178d0a7>] fib_rules_lookup+0x117/0x1a0
> [ 243.775060] [<c184aedb>] fib6_rule_lookup+0x3b/0x70
> [ 243.775060] [<c1825106>] ip6_route_input_lookup.isra.39
> +0x46/0x50
> [ 243.775060] [<c1825a4d>] ip6_route_input+0x9d/0xb0
> [ 243.775060] [<c18187f7>] ip6_rcv_finish+0x147/0x1d0
> [ 243.775060] [<c18197c6>] ipv6_rcv+0x686/0xa10
> [ 243.775060] [<c17716cb>] __netif_receive_skb_core+0x4ab/0x7b0
> [ 244.044145] BUG: unable to handle kernel NULL pointer dereference at
> 0000006c
> [ 244.044227] IP: [<c115ffc0>] __kmalloc_track_caller+0xb0/0x2b0
> [ 244.044227] *pde = 00000000
> [ 244.044227] Oops: 0000 [#1] PREEMPT SMP
> [ 244.044227] Modules linked in: bluetooth_6lowpan 6lowpan rfcomm bnep
> ecb btusb bluetooth nfc rfkill snd_intel8x0 parport_pc ohci_pci
> snd_ac97_codec ac97_bus parport
>
>
>
> Cheers,
> Jukka
>
>
next prev parent reply other threads:[~2014-10-08 11:07 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-07 15:33 [PATCH bluetooth-next] 6lowpan: Use pskb_expand_head in IPHC decompression Martin Townsend
2014-10-07 15:33 ` Martin Townsend
2014-10-07 15:37 ` Martin Townsend
2014-10-08 10:24 ` Jukka Rissanen
2014-10-08 11:07 ` Martin Townsend [this message]
2014-10-08 12:12 ` Jukka Rissanen
2014-10-08 12:52 ` Martin Townsend
2014-10-08 13:35 ` Jukka Rissanen
2014-10-08 13:42 ` Martin Townsend
2014-10-07 16:14 ` Alexander Aring
2014-10-07 16:17 ` Alexander Aring
2014-10-07 18:25 ` Martin Townsend
2014-10-07 18:58 ` Alexander Aring
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