linux-kernel - Re: oops in kernel ( 3.4.x -> 3.5rc )

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Message-ID: <CADdae-hfLecu_87tMSkXbwuNRF6O3XYdexH3DrUgSgoHHc5S_w@mail.gmail.com>
Date:	Sat, 28 Jul 2012 09:52:34 +0200
From:	nicolas prochazka <prochazka.nicolas@...il.com>
To:	Thadeu Lima de Souza Cascardo <cascardo@...ux.vnet.ibm.com>
Cc:	Dave Jones <davej@...hat.com>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	David Howells <dhowells@...hat.com>,
	Bobby Powers <bobbypowers@...il.com>
Subject: Re: oops in kernel ( 3.4.x -> 3.5rc )

hello again,
bisect git gives ( after 13 steps) :
58bca4a8fa90fcf9069379653b396b2cec642f7f is the first bad commit

Regards,
Nicolas Prochazka

2012/7/24 Thadeu Lima de Souza Cascardo <cascardo@...ux.vnet.ibm.com>:
> On Mon, Jul 23, 2012 at 11:15:09PM +0200, nicolas prochazka wrote:
>> Hello,
>> I 'm trying differents versions with differents results
>>
>> - commit f044db4cb4bf16893812d35b5fbeaaf3e30c9215  : bug is not reproductible
>> - 3.5rc7  : bug is reproductible    (cf new dump )
>> - master branch  : bug is reproductible
>>
>>
>>
>> Regards,
>> Nicolas Prochazka
>>
>>
>
> Hi, Nicolas.
>
> Can you try a bisect? I am also copying David Howells and Bobby Powers,
> even though their set of patches don't seem to be the culprit.
>
> Regards.
> Cascardo.
>
>> Jul 23 21:10:05 positronic18696 BUG: unable to handle kernel paging
>> request at 000000010000002f
>> Jul 23 21:10:05 positronic18696 IP: [<ffffffff81156900>] dup_fd+0x160/0x2e0
>> Jul 23 21:10:05 positronic18696 PGD 6627ea067 PUD 0
>> Jul 23 21:10:05 positronic18696 Oops: 0002 [#1] SMP
>> Jul 23 21:10:05 positronic18696 CPU 1
>> Jul 23 21:10:05 positronic18696 Modules linked in: kvm_intel kvm
>> Jul 23 21:10:05 positronic18696
>> Jul 23 21:10:05 positronic18696 Pid: 17596, comm: queue.sh Not tainted
>> 3.5.0-rc7-dirty #6 Dell Inc. PowerEdge M600/0MY736
>> Jul 23 21:10:05 positronic18696 RIP: 0010:[<ffffffff81156900>]
>> [<ffffffff81156900>] dup_fd+0x160/0x2e0
>> Jul 23 21:10:05 positronic18696 RSP: 0018:ffff880669ebdd90  EFLAGS: 00010206
>> Jul 23 21:10:05 positronic18696 RAX: 0000000000000038 RBX:
>> ffff8807ed95eec0 RCX: 0000000000000007
>> Jul 23 21:10:05 positronic18696 RDX: 00000000ffffffff RSI:
>> 0000000000000800 RDI: ffff8805a4d01d40
>> Jul 23 21:10:05 positronic18696 RBP: ffff880669ebddf0 R08:
>> 0000000000000020 R09: ffffffff81156694
>> Jul 23 21:10:05 positronic18696 R10: 0000000000000001 R11:
>> 0000000000000000 R12: ffff8807ecf25000
>> Jul 23 21:10:05 positronic18696 R13: ffff8805a4d01d80 R14:
>> 0000000000000100 R15: ffff8807d3a61800
>> Jul 23 21:10:05 positronic18696 FS:  00007f1a8e719700(0000)
>> GS:ffff88083fc40000(0000) knlGS:0000000000000000
>> Jul 23 21:10:05 positronic18696 CS:  0010 DS: 0000 ES: 0000 CR0:
>> 000000008005003b
>> Jul 23 21:10:05 positronic18696 CR2: 000000010000002f CR3:
>> 000000066ef90000 CR4: 00000000000027e0
>> Jul 23 21:10:05 positronic18696 DR0: 0000000000000001 DR1:
>> 0000000000000002 DR2: 0000000000000001
>> Jul 23 21:10:05 positronic18696 DR3: 000000000000000a DR6:
>> 00000000ffff0ff0 DR7: 0000000000000400
>> Jul 23 21:10:05 positronic18696 Process queue.sh (pid: 17596,
>> threadinfo ffff880669ebc000, task ffff8806625ab000)
>> Jul 23 21:10:05 positronic18696 Stack:
>> Jul 23 21:10:05 positronic18696 ffff880669ebdda0 000000018102db49
>> 0000000000000020 ffff8806627ee8c0
>> Jul 23 21:10:05 positronic18696 ffff8807eefc1608 ffff8807eefc1680
>> 00007f1a8e7199d0 ffff8807bf41d000
>> Jul 23 21:10:05 positronic18696 0000000000000000 0000000001200011
>> 00007f1a8e7199d0 0000000000000000
>> Jul 23 21:10:05 positronic18696 Call Trace:
>> Jul 23 21:10:05 positronic18696 [<ffffffff81040441>] copy_process+0x931/0x13c0
>> Jul 23 21:10:05 positronic18696 [<ffffffff81041024>] do_fork+0x54/0x360
>> Jul 23 21:10:05 positronic18696 [<ffffffff81ac3b7e>] ? _raw_spin_lock+0xe/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff810559e7>] ?
>> __set_task_blocked+0x37/0x80
>> Jul 23 21:10:05 positronic18696 [<ffffffff81055a83>] ?
>> __set_current_blocked+0x53/0x70
>> Jul 23 21:10:05 positronic18696 [<ffffffff8100c098>] sys_clone+0x28/0x30
>> Jul 23 21:10:05 positronic18696 [<ffffffff81ac4bb3>] stub_clone+0x13/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff81ac4929>] ?
>> system_call_fastpath+0x16/0x1b
>> Jul 23 21:10:05 positronic18696 Code: 8b 45 b0 49 8b 7d 10 48 8b 71 10
>> 4c 89 c2 e8 08 82 23 00 45 85 f6 74 54 41 8d 46 ff 31 c9 48 8d 34 c5
>> 08 00 00 00 31 c0 eb 15 90 <f0> 48 ff 42 30 49 89 14 04 ff c1 48 83 c0
>> 08 48 39 f0 74 24 49
>> Jul 23 21:10:05 positronic18696 RIP  [<ffffffff81156900>] dup_fd+0x160/0x2e0
>> Jul 23 21:10:05 positronic18696 RSP <ffff880669ebdd90>
>> Jul 23 21:10:05 positronic18696 CR2: 000000010000002f
>> Jul 23 21:10:05 positronic18696 ---[ end trace ccf5b66c39d92756 ]---
>> Jul 23 21:10:05 positronic18696 device vmtap35 left promiscuous mode
>> Jul 23 21:10:05 positronic18696 device vmEtap35 left promiscuous mode
>> Jul 23 21:10:05 positronic18696 device vmtap36 left promiscuous mode
>> Jul 23 21:10:05 positronic18696 device vmEtap36 left promiscuous mode
>> Jul 23 21:10:05 positronic18696 device vmtap37 left promiscuous mode
>> Jul 23 21:10:05 positronic18696 device vmEtap37 left promiscuous mode
>> Jul 23 21:10:05 positronic18696 device vmtap38 left promiscuous mode
>> Jul 23 21:10:05 positronic18696 device vmEtap38 left promiscuous mode
>> Jul 23 21:10:05 positronic18696 BUG: unable to handle kernel paging
>> request at 000000010000003b
>> Jul 23 21:10:05 positronic18696 IP: [<ffffffff8119f684>]
>> tid_fd_revalidate+0x84/0x1a0
>> Jul 23 21:10:05 positronic18696 PGD 598c9e067 PUD 0
>> Jul 23 21:10:05 positronic18696 Oops: 0000 [#2] SMP
>> Jul 23 21:10:05 positronic18696 CPU 0
>> Jul 23 21:10:05 positronic18696 Modules linked in: kvm_intel kvm
>> Jul 23 21:10:05 positronic18696
>> Jul 23 21:10:05 positronic18696 Pid: 21815, comm: netstat Tainted: G
>>    D      3.5.0-rc7-dirty #6 Dell Inc. PowerEdge M600/0MY736
>> Jul 23 21:10:05 positronic18696 RIP: 0010:[<ffffffff8119f684>]
>> [<ffffffff8119f684>] tid_fd_revalidate+0x84/0x1a0
>> Jul 23 21:10:05 positronic18696 RSP: 0018:ffff88053f965d78  EFLAGS: 00010206
>> Jul 23 21:10:05 positronic18696 RAX: ffff8807ee3bf700 RBX:
>> ffff8807ed1d9118 RCX: 000000000000007e
>> Jul 23 21:10:05 positronic18696 RDX: 00000000ffffffff RSI:
>> 0000000000000000 RDI: ffff8807ee3bf700
>> Jul 23 21:10:05 positronic18696 RBP: ffff88053f965d98 R08:
>> ffff88083fc16a10 R09: ffffffff8119bfe0
>> Jul 23 21:10:05 positronic18696 R10: 0000000000000000 R11:
>> 0000000000000206 R12: ffff8807d8afaa80
>> Jul 23 21:10:05 positronic18696 R13: ffff8808139d7000 R14:
>> ffff8807ed98d038 R15: ffff88053f965e08
>> Jul 23 21:10:05 positronic18696 FS:  00007faee78b5700(0000)
>> GS:ffff88083fc00000(0000) knlGS:0000000000000000
>> Jul 23 21:10:05 positronic18696 CS:  0010 DS: 0000 ES: 0000 CR0:
>> 0000000080050033
>> Jul 23 21:10:05 positronic18696 CR2: 000000010000003b CR3:
>> 00000007e2eb5000 CR4: 00000000000007e0
>> Jul 23 21:10:05 positronic18696 DR0: 0000000000000001 DR1:
>> 0000000000000002 DR2: 0000000000000001
>> Jul 23 21:10:05 positronic18696 DR3: 000000000000000a DR6:
>> 00000000ffff0ff0 DR7: 0000000000000400
>> Jul 23 21:10:05 positronic18696 Process netstat (pid: 21815,
>> threadinfo ffff88053f964000, task ffff8807c6207000)
>> Jul 23 21:10:05 positronic18696 Stack:
>> Jul 23 21:10:05 positronic18696 ffff8807d8afaa80 0000000000000007
>> ffff8807ed1d9118 ffff8807ee63ab40
>> Jul 23 21:10:05 positronic18696 ffff88053f965dc8 ffffffff8119f8b0
>> ffffffffff0a0210 0000000000000001
>> Jul 23 21:10:05 positronic18696 ffff88053f965e98 ffff8807eca70200
>> ffff88053f965e48 ffffffff811a0876
>> Jul 23 21:10:05 positronic18696 Call Trace:
>> Jul 23 21:10:05 positronic18696 [<ffffffff8119f8b0>]
>> proc_fd_instantiate+0x80/0xa0
>> Jul 23 21:10:05 positronic18696 [<ffffffff811a0876>] proc_fill_cache+0x126/0x150
>> Jul 23 21:10:05 positronic18696 [<ffffffff8119f830>] ?
>> proc_fdinfo_instantiate+0x90/0x90
>> Jul 23 21:10:05 positronic18696 [<ffffffff8114cc50>] ? filldir64+0xe0/0xe0
>> Jul 23 21:10:05 positronic18696 [<ffffffff811a0ba6>]
>> proc_readfd_common+0xf6/0x1c0
>> Jul 23 21:10:05 positronic18696 [<ffffffff8119f830>] ?
>> proc_fdinfo_instantiate+0x90/0x90
>> Jul 23 21:10:05 positronic18696 [<ffffffff8114cc50>] ? filldir64+0xe0/0xe0
>> Jul 23 21:10:05 positronic18696 [<ffffffff811a0ca5>] proc_readfd+0x15/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff8114ce70>] vfs_readdir+0xa0/0xc0
>> Jul 23 21:10:05 positronic18696 [<ffffffff8114cc50>] ? filldir64+0xe0/0xe0
>> Jul 23 21:10:05 positronic18696 [<ffffffff8114d01d>] sys_getdents+0x8d/0x100
>> Jul 23 21:10:05 positronic18696 [<ffffffff81ac4929>]
>> system_call_fastpath+0x16/0x1b
>> Jul 23 21:10:05 positronic18696 Code: b8 00 00 00 48 8b 50 08 44 3b 32
>> 0f 83 9e 00 00 00 45 89 f6 49 c1 e6 03 4c 03 72 08 49 8b 16 48 85 d2
>> 0f 84 87 00 00 00 48 89 c7 <44> 8b 62 3c e8 b3 67 ea ff 4c 89 ef e8 0b
>> e0 ff ff 85 c0 0f 84
>> Jul 23 21:10:05 positronic18696 RIP  [<ffffffff8119f684>]
>> tid_fd_revalidate+0x84/0x1a0
>> Jul 23 21:10:05 positronic18696 RSP <ffff88053f965d78>
>> Jul 23 21:10:05 positronic18696 CR2: 000000010000003b
>> Jul 23 21:10:05 positronic18696 ---[ end trace ccf5b66c39d92757 ]---
>> Jul 23 21:10:05 positronic18696 BUG: unable to handle kernel paging
>> request at 000000010000002f
>> Jul 23 21:10:05 positronic18696 IP: [<ffffffff81156900>] dup_fd+0x160/0x2e0
>> Jul 23 21:10:05 positronic18696 PGD 7ee96c067 PUD 0
>> Jul 23 21:10:05 positronic18696 Oops: 0002 [#3] SMP
>> Jul 23 21:10:05 positronic18696 CPU 3
>> Jul 23 21:10:05 positronic18696 Modules linked in: kvm_intel kvm
>> Jul 23 21:10:05 positronic18696
>> Jul 23 21:10:05 positronic18696 Pid: 7882, comm: bash Tainted: G
>> D      3.5.0-rc7-dirty #6 Dell Inc. PowerEdge M600/0MY736
>> Jul 23 21:10:05 positronic18696 RIP: 0010:[<ffffffff81156900>]
>> [<ffffffff81156900>] dup_fd+0x160/0x2e0
>> Jul 23 21:10:05 positronic18696 RSP: 0018:ffff8807ec9e1d90  EFLAGS: 00010206
>> Jul 23 21:10:05 positronic18696 RAX: 0000000000000038 RBX:
>> ffff8807ed42de40 RCX: 0000000000000007
>> Jul 23 21:10:05 positronic18696 RDX: 00000000ffffffff RSI:
>> 0000000000000800 RDI: ffff8807ef0de080
>> Jul 23 21:10:05 positronic18696 RBP: ffff8807ec9e1df0 R08:
>> 0000000000000020 R09: ffffffff81156694
>> Jul 23 21:10:05 positronic18696 R10: 00000000fffffffb R11:
>> 0000000000000000 R12: ffff8807eb8ec000
>> Jul 23 21:10:05 positronic18696 R13: ffff8807ef0de440 R14:
>> 0000000000000100 R15: ffff8807ed98d000
>> Jul 23 21:10:05 positronic18696 FS:  00007f7d50f02700(0000)
>> GS:ffff88083fcc0000(0000) knlGS:0000000000000000
>> Jul 23 21:10:05 positronic18696 CS:  0010 DS: 0000 ES: 0000 CR0:
>> 000000008005003b
>> Jul 23 21:10:05 positronic18696 CR2: 000000010000002f CR3:
>> 00000007ed669000 CR4: 00000000000007e0
>> Jul 23 21:10:05 positronic18696 DR0: 0000000000000001 DR1:
>> 0000000000000002 DR2: 0000000000000001
>> Jul 23 21:10:05 positronic18696 DR3: 000000000000000a DR6:
>> 00000000ffff0ff0 DR7: 0000000000000400
>> Jul 23 21:10:05 positronic18696 Process bash (pid: 7882, threadinfo
>> ffff8807ec9e0000, task ffff8808139d7000)
>> Jul 23 21:10:05 positronic18696 Stack:
>> Jul 23 21:10:05 positronic18696 ffff8807ec9e1da0 000000018102db49
>> 0000000000000020 ffff8807ef0de980
>> Jul 23 21:10:05 positronic18696 ffff8807ee3bf708 ffff8807ee3bf780
>> 00007f7d50f029d0 ffff8806627e6000
>> Jul 23 21:10:05 positronic18696 0000000000000000 0000000001200011
>> 00007f7d50f029d0 0000000000000000
>> Jul 23 21:10:05 positronic18696 Call Trace:
>> Jul 23 21:10:05 positronic18696 [<ffffffff81040441>] copy_process+0x931/0x13c0
>> Jul 23 21:10:05 positronic18696 [<ffffffff8112902f>] ?
>> kmem_cache_alloc+0xaf/0x110
>> Jul 23 21:10:05 positronic18696 [<ffffffff81041024>] do_fork+0x54/0x360
>> Jul 23 21:10:05 positronic18696 [<ffffffff81ac3b7e>] ? _raw_spin_lock+0xe/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff81139247>] ? fd_install+0x67/0x90
>> Jul 23 21:10:05 positronic18696 [<ffffffff81144580>] ? do_pipe_flags+0xb0/0x100
>> Jul 23 21:10:05 positronic18696 [<ffffffff8100c098>] sys_clone+0x28/0x30
>> Jul 23 21:10:05 positronic18696 [<ffffffff81ac4bb3>] stub_clone+0x13/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff81ac4929>] ?
>> system_call_fastpath+0x16/0x1b
>> Jul 23 21:10:05 positronic18696 Code: 8b 45 b0 49 8b 7d 10 48 8b 71 10
>> 4c 89 c2 e8 08 82 23 00 45 85 f6 74 54 41 8d 46 ff 31 c9 48 8d 34 c5
>> 08 00 00 00 31 c0 eb 15 90 <f0> 48 ff 42 30 49 89 14 04 ff c1 48 83 c0
>> 08 48 39 f0 74 24 49
>> Jul 23 21:10:05 positronic18696 RIP  [<ffffffff81156900>] dup_fd+0x160/0x2e0
>> Jul 23 21:10:05 positronic18696 RSP <ffff8807ec9e1d90>
>> Jul 23 21:10:05 positronic18696 CR2: 000000010000002f
>> Jul 23 21:10:05 positronic18696 ---[ end trace ccf5b66c39d92758 ]---
>> Jul 23 21:10:05 positronic18696 BUG: unable to handle kernel paging
>> request at 000000010000003b
>> Jul 23 21:10:05 positronic18696 IP: [<ffffffff8119f684>]
>> tid_fd_revalidate+0x84/0x1a0
>> Jul 23 21:10:05 positronic18696 PGD 7ec990067 PUD 0
>> Jul 23 21:10:05 positronic18696 Oops: 0000 [#4] SMP
>> Jul 23 21:10:05 positronic18696 CPU 3
>> Jul 23 21:10:05 positronic18696 Modules linked in: kvm_intel kvm
>> Jul 23 21:10:05 positronic18696
>> Jul 23 21:10:05 positronic18696 Pid: 22417, comm: netstat Tainted: G
>>    D      3.5.0-rc7-dirty #6 Dell Inc. PowerEdge M600/0MY736
>> Jul 23 21:10:05 positronic18696 RIP: 0010:[<ffffffff8119f684>]
>> [<ffffffff8119f684>] tid_fd_revalidate+0x84/0x1a0
>> Jul 23 21:10:05 positronic18696 RSP: 0018:ffff88066ef4fcd8  EFLAGS: 00010206
>> Jul 23 21:10:05 positronic18696 RAX: ffff8807ee3bf180 RBX:
>> ffff8807ed065f88 RCX: ffff8807ed051000
>> Jul 23 21:10:05 positronic18696 RDX: 00000000ffffffff RSI:
>> 0000000000000000 RDI: ffff8807ee3bf180
>> Jul 23 21:10:05 positronic18696 RBP: ffff88066ef4fcf8 R08:
>> ffff8807ed051038 R09: ffffffffffcaffc8
>> Jul 23 21:10:05 positronic18696 R10: ffff88066ef4fc44 R11:
>> 0000000000000004 R12: ffff8807ed051000
>> Jul 23 21:10:05 positronic18696 R13: ffff8807ee1ab000 R14:
>> ffff8807eb875038 R15: ffff880813b59c20
>> Jul 23 21:10:05 positronic18696 FS:  00007f7200558700(0000)
>> GS:ffff88083fcc0000(0000) knlGS:0000000000000000
>> Jul 23 21:10:05 positronic18696 CS:  0010 DS: 0000 ES: 0000 CR0:
>> 0000000080050033
>> Jul 23 21:10:05 positronic18696 CR2: 000000010000003b CR3:
>> 00000007ec9fd000 CR4: 00000000000027e0
>> Jul 23 21:10:05 positronic18696 DR0: 0000000000000001 DR1:
>> 0000000000000002 DR2: 0000000000000001
>> Jul 23 21:10:05 positronic18696 DR3: 000000000000000a DR6:
>> 00000000ffff0ff0 DR7: 0000000000000400
>> Jul 23 21:10:05 positronic18696 Process netstat (pid: 22417,
>> threadinfo ffff88066ef4e000, task ffff8807ecfa9000)
>> Jul 23 21:10:05 positronic18696 Stack:
>> Jul 23 21:10:05 positronic18696 ffff88066ef4fdb8 ffff88066ef4fe48
>> ffff88066ef4fdc8 0000000000000001
>> Jul 23 21:10:05 positronic18696 ffff88066ef4fd58 ffffffff811460dc
>> ffff880813b59c20 ffff8807ed051000
>> Jul 23 21:10:05 positronic18696 0000000000000001 ffff8807ed0642a8
>> 0000000000000040 ffff88066ef4fe48
>> Jul 23 21:10:05 positronic18696 Call Trace:
>> Jul 23 21:10:05 positronic18696 [<ffffffff811460dc>] lookup_fast+0x1fc/0x2f0
>> Jul 23 21:10:05 positronic18696 [<ffffffff81147d2d>] path_lookupat+0x12d/0x780
>> Jul 23 21:10:05 positronic18696 [<ffffffff81150d94>] ? dynamic_dname+0x94/0xa0
>> Jul 23 21:10:05 positronic18696 [<ffffffff811483b3>] do_path_lookup+0x33/0x80
>> Jul 23 21:10:05 positronic18696 [<ffffffff811486a9>]
>> user_path_at_empty+0x59/0xb0
>> Jul 23 21:10:05 positronic18696 [<ffffffff81145ad2>] ? path_put+0x22/0x30
>> Jul 23 21:10:05 positronic18696 [<ffffffff81ac3b7e>] ? _raw_spin_lock+0xe/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff8106d29a>] ? lg_local_unlock+0x1a/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff81159264>] ?
>> mntput_no_expire+0x44/0x140
>> Jul 23 21:10:05 positronic18696 [<ffffffff81159381>] ? mntput+0x21/0x40
>> Jul 23 21:10:05 positronic18696 [<ffffffff8113facd>] sys_readlinkat+0x4d/0xc0
>> Jul 23 21:10:05 positronic18696 [<ffffffff8113fb5b>] sys_readlink+0x1b/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff81ac4929>]
>> system_call_fastpath+0x16/0x1b
>> Jul 23 21:10:05 positronic18696 Code: b8 00 00 00 48 8b 50 08 44 3b 32
>> 0f 83 9e 00 00 00 45 89 f6 49 c1 e6 03 4c 03 72 08 49 8b 16 48 85 d2
>> 0f 84 87 00 00 00 48 89 c7 <44> 8b 62 3c e8 b3 67 ea ff 4c 89 ef e8 0b
>> e0 ff ff 85 c0 0f 84
>> Jul 23 21:10:05 positronic18696 RIP  [<ffffffff8119f684>]
>> tid_fd_revalidate+0x84/0x1a0
>> Jul 23 21:10:05 positronic18696 RSP <ffff88066ef4fcd8>
>> Jul 23 21:10:05 positronic18696 CR2: 000000010000003b
>> Jul 23 21:10:05 positronic18696 ---[ end trace ccf5b66c39d92759 ]---
>> Jul 23 21:10:05 positronic18696 device vmtap24 entered promiscuous mode
>> Jul 23 21:10:05 positronic18696 BUG: unable to handle kernel paging
>> request at 000000010000003b
>> Jul 23 21:10:05 positronic18696 IP: [<ffffffff8119f684>]
>> tid_fd_revalidate+0x84/0x1a0
>> Jul 23 21:10:05 positronic18696 PGD 7ecea9067 PUD 0
>> Jul 23 21:10:05 positronic18696 Oops: 0000 [#5] SMP
>> Jul 23 21:10:05 positronic18696 CPU 2
>> Jul 23 21:10:05 positronic18696 Modules linked in: kvm_intel kvm
>> Jul 23 21:10:05 positronic18696
>> Jul 23 21:10:05 positronic18696 Pid: 22487, comm: netstat Tainted: G
>>    D      3.5.0-rc7-dirty #6 Dell Inc. PowerEdge M600/0MY736
>> Jul 23 21:10:05 positronic18696 RIP: 0010:[<ffffffff8119f684>]
>> [<ffffffff8119f684>] tid_fd_revalidate+0x84/0x1a0
>> Jul 23 21:10:05 positronic18696 RSP: 0018:ffff8807ecb4dcd8  EFLAGS: 00010206
>> Jul 23 21:10:05 positronic18696 RAX: ffff8807ee3bf180 RBX:
>> ffff8807ed065f88 RCX: ffff8807ed051000
>> Jul 23 21:10:05 positronic18696 RDX: 00000000ffffffff RSI:
>> 0000000000000000 RDI: ffff8807ee3bf180
>> Jul 23 21:10:05 positronic18696 RBP: ffff8807ecb4dcf8 R08:
>> ffff8807ed051038 R09: ffffffffffcaffc8
>> Jul 23 21:10:05 positronic18696 R10: ffff8807ecb4dc44 R11:
>> 0000000000000004 R12: ffff8807ed051000
>> Jul 23 21:10:05 positronic18696 R13: ffff8807ee1ab000 R14:
>> ffff8807eb875038 R15: ffff880813b59c20
>> Jul 23 21:10:05 positronic18696 FS:  00007f370dd20700(0000)
>> GS:ffff88083fc80000(0000) knlGS:0000000000000000
>> Jul 23 21:10:05 positronic18696 CS:  0010 DS: 0000 ES: 0000 CR0:
>> 0000000080050033
>> Jul 23 21:10:05 positronic18696 CR2: 000000010000003b CR3:
>> 0000000623f45000 CR4: 00000000000027e0
>> Jul 23 21:10:05 positronic18696 DR0: 0000000000000001 DR1:
>> 0000000000000002 DR2: 0000000000000001
>> Jul 23 21:10:05 positronic18696 DR3: 000000000000000a DR6:
>> 00000000ffff0ff0 DR7: 0000000000000400
>> Jul 23 21:10:05 positronic18696 Process netstat (pid: 22487,
>> threadinfo ffff8807ecb4c000, task ffff8807d1b99000)
>> Jul 23 21:10:05 positronic18696 Stack:
>> Jul 23 21:10:05 positronic18696 ffff8807ecb4ddb8 ffff8807ecb4de48
>> ffff8807ecb4ddc8 0000000000000001
>> Jul 23 21:10:05 positronic18696 ffff8807ecb4dd58 ffffffff811460dc
>> ffff880813b59c20 ffff8807ed051000
>> Jul 23 21:10:05 positronic18696 0000000000000001 ffff8807ed0642a8
>> 0000000000000040 ffff8807ecb4de48
>> Jul 23 21:10:05 positronic18696 Call Trace:
>> Jul 23 21:10:05 positronic18696 [<ffffffff811460dc>] lookup_fast+0x1fc/0x2f0
>> Jul 23 21:10:05 positronic18696 [<ffffffff81147d2d>] path_lookupat+0x12d/0x780
>> Jul 23 21:10:05 positronic18696 [<ffffffff81150d94>] ? dynamic_dname+0x94/0xa0
>> Jul 23 21:10:05 positronic18696 [<ffffffff811483b3>] do_path_lookup+0x33/0x80
>> Jul 23 21:10:05 positronic18696 [<ffffffff811486a9>]
>> user_path_at_empty+0x59/0xb0
>> Jul 23 21:10:05 positronic18696 [<ffffffff81145ad2>] ? path_put+0x22/0x30
>> Jul 23 21:10:05 positronic18696 [<ffffffff81ac3b7e>] ? _raw_spin_lock+0xe/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff8106d29a>] ? lg_local_unlock+0x1a/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff81159264>] ?
>> mntput_no_expire+0x44/0x140
>> Jul 23 21:10:05 positronic18696 [<ffffffff81159381>] ? mntput+0x21/0x40
>> Jul 23 21:10:05 positronic18696 [<ffffffff8113facd>] sys_readlinkat+0x4d/0xc0
>> Jul 23 21:10:05 positronic18696 [<ffffffff8113fb5b>] sys_readlink+0x1b/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff81ac4929>]
>> system_call_fastpath+0x16/0x1b
>> Jul 23 21:10:05 positronic18696 Code: b8 00 00 00 48 8b 50 08 44 3b 32
>> 0f 83 9e 00 00 00 45 89 f6 49 c1 e6 03 4c 03 72 08 49 8b 16 48 85 d2
>> 0f 84 87 00 00 00 48 89 c7 <44> 8b 62 3c e8 b3 67 ea ff 4c 89 ef e8 0b
>> e0 ff ff 85 c0 0f 84
>> Jul 23 21:10:05 positronic18696 RIP  [<ffffffff8119f684>]
>> tid_fd_revalidate+0x84/0x1a0
>> Jul 23 21:10:05 positronic18696 RSP <ffff8807ecb4dcd8>
>> Jul 23 21:10:05 positronic18696 CR2: 000000010000003b
>> Jul 23 21:10:05 positronic18696 ---[ end trace ccf5b66c39d9275a ]---
>> Jul 23 21:10:05 positronic18696 device vmEtap24 entered promiscuous mode
>> Jul 23 21:10:05 positronic18696 BUG: unable to handle kernel paging
>> request at 000000010000003b
>> Jul 23 21:10:05 positronic18696 IP: [<ffffffff8119f684>]
>> tid_fd_revalidate+0x84/0x1a0
>> Jul 23 21:10:05 positronic18696 PGD 7ec9a0067 PUD 0
>> Jul 23 21:10:05 positronic18696 Oops: 0000 [#6] SMP
>> Jul 23 21:10:05 positronic18696 CPU 3
>> Jul 23 21:10:05 positronic18696 Modules linked in: kvm_intel kvm
>> Jul 23 21:10:05 positronic18696
>> Jul 23 21:10:05 positronic18696 Pid: 22570, comm: netstat Tainted: G
>>    D      3.5.0-rc7-dirty #6 Dell Inc. PowerEdge M600/0MY736
>> Jul 23 21:10:05 positronic18696 RIP: 0010:[<ffffffff8119f684>]
>> [<ffffffff8119f684>] tid_fd_revalidate+0x84/0x1a0
>> Jul 23 21:10:05 positronic18696 RSP: 0018:ffff88066edebcd8  EFLAGS: 00010206
>> Jul 23 21:10:05 positronic18696 RAX: ffff8807ee3bf180 RBX:
>> ffff8807ed065f88 RCX: ffff8807ed051000
>> Jul 23 21:10:05 positronic18696 RDX: 00000000ffffffff RSI:
>> 0000000000000000 RDI: ffff8807ee3bf180
>> Jul 23 21:10:05 positronic18696 RBP: ffff88066edebcf8 R08:
>> ffff8807ed051038 R09: ffffffffffcaffc8
>> Jul 23 21:10:05 positronic18696 R10: ffff88066edebc44 R11:
>> 0000000000000004 R12: ffff8807ed051000
>> Jul 23 21:10:05 positronic18696 R13: ffff8807ee1ab000 R14:
>> ffff8807eb875038 R15: ffff880813b59c20
>> Jul 23 21:10:05 positronic18696 FS:  00007f914b112700(0000)
>> GS:ffff88083fcc0000(0000) knlGS:0000000000000000
>> Jul 23 21:10:05 positronic18696 CS:  0010 DS: 0000 ES: 0000 CR0:
>> 0000000080050033
>> Jul 23 21:10:05 positronic18696 CR2: 000000010000003b CR3:
>> 00000005a4c9b000 CR4: 00000000000027e0
>> Jul 23 21:10:05 positronic18696 DR0: 0000000000000001 DR1:
>> 0000000000000002 DR2: 0000000000000001
>> Jul 23 21:10:05 positronic18696 DR3: 000000000000000a DR6:
>> 00000000ffff0ff0 DR7: 0000000000000400
>> Jul 23 21:10:05 positronic18696 Process netstat (pid: 22570,
>> threadinfo ffff88066edea000, task ffff8807eefa2000)
>> Jul 23 21:10:05 positronic18696 Stack:
>> Jul 23 21:10:05 positronic18696 ffff88066edebdb8 ffff88066edebe48
>> ffff88066edebdc8 0000000000000001
>> Jul 23 21:10:05 positronic18696 ffff88066edebd58 ffffffff811460dc
>> ffff880813b59c20 ffff8807ed051000
>> Jul 23 21:10:05 positronic18696 0000000000000001 ffff8807ed0642a8
>> 0000000000000040 ffff88066edebe48
>> Jul 23 21:10:05 positronic18696 Call Trace:
>> Jul 23 21:10:05 positronic18696 [<ffffffff811460dc>] lookup_fast+0x1fc/0x2f0
>> Jul 23 21:10:05 positronic18696 [<ffffffff81147d2d>] path_lookupat+0x12d/0x780
>> Jul 23 21:10:05 positronic18696 [<ffffffff81150d94>] ? dynamic_dname+0x94/0xa0
>> Jul 23 21:10:05 positronic18696 [<ffffffff811483b3>] do_path_lookup+0x33/0x80
>> Jul 23 21:10:05 positronic18696 [<ffffffff811486a9>]
>> user_path_at_empty+0x59/0xb0
>> Jul 23 21:10:05 positronic18696 [<ffffffff81145ad2>] ? path_put+0x22/0x30
>> Jul 23 21:10:05 positronic18696 [<ffffffff81ac3b7e>] ? _raw_spin_lock+0xe/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff8106d29a>] ? lg_local_unlock+0x1a/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff81159264>] ?
>> mntput_no_expire+0x44/0x140
>> Jul 23 21:10:05 positronic18696 [<ffffffff81159381>] ? mntput+0x21/0x40
>> Jul 23 21:10:05 positronic18696 [<ffffffff8113facd>] sys_readlinkat+0x4d/0xc0
>> Jul 23 21:10:05 positronic18696 [<ffffffff8113fb5b>] sys_readlink+0x1b/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff81ac4929>]
>> system_call_fastpath+0x16/0x1b
>> Jul 23 21:10:05 positronic18696 Code: b8 00 00 00 48 8b 50 08 44 3b 32
>> 0f 83 9e 00 00 00 45 89 f6 49 c1 e6 03 4c 03 72 08 49 8b 16 48 85 d2
>> 0f 84 87 00 00 00 48 89 c7 <44> 8b 62 3c e8 b3 67 ea ff 4c 89 ef e8 0b
>> e0 ff ff 85 c0 0f 84
>> Jul 23 21:10:05 positronic18696 RIP  [<ffffffff8119f684>]
>> tid_fd_revalidate+0x84/0x1a0
>> Jul 23 21:10:05 positronic18696 RSP <ffff88066edebcd8>
>> Jul 23 21:10:05 positronic18696 CR2: 000000010000003b
>> Jul 23 21:10:05 positronic18696 ---[ end trace ccf5b66c39d9275b ]---
>> Jul 23 21:10:05 positronic18696 BUG: unable to handle kernel paging
>> request at 000000010000003b
>> Jul 23 21:10:05 positronic18696 IP: [<ffffffff8119f684>]
>> tid_fd_revalidate+0x84/0x1a0
>> Jul 23 21:10:05 positronic18696 PGD 53d536067 PUD 0
>> Jul 23 21:10:05 positronic18696 Oops: 0000 [#7] SMP
>> Jul 23 21:10:05 positronic18696 CPU 1
>> Jul 23 21:10:05 positronic18696 Modules linked in: kvm_intel kvm
>> Jul 23 21:10:05 positronic18696
>> Jul 23 21:10:05 positronic18696 Pid: 22727, comm: netstat Tainted: G
>>    D      3.5.0-rc7-dirty #6 Dell Inc. PowerEdge M600/0MY736
>> Jul 23 21:10:05 positronic18696 RIP: 0010:[<ffffffff8119f684>]
>> [<ffffffff8119f684>] tid_fd_revalidate+0x84/0x1a0
>> Jul 23 21:10:05 positronic18696 RSP: 0018:ffff8807bf797cd8  EFLAGS: 00010206
>> Jul 23 21:10:05 positronic18696 RAX: ffff8807ee3bf180 RBX:
>> ffff8807ed065f88 RCX: ffff8807ed051000
>> Jul 23 21:10:05 positronic18696 RDX: 00000000ffffffff RSI:
>> 0000000000000000 RDI: ffff8807ee3bf180
>> Jul 23 21:10:05 positronic18696 RBP: ffff8807bf797cf8 R08:
>> ffff8807ed051038 R09: ffffffffffcaffc8
>> Jul 23 21:10:05 positronic18696 R10: ffff8807bf797c44 R11:
>> 0000000000000004 R12: ffff8807ed051000
>> Jul 23 21:10:05 positronic18696 R13: ffff8807ee1ab000 R14:
>> ffff8807eb875038 R15: ffff880813b59c20
>> Jul 23 21:10:05 positronic18696 FS:  00007f49e0de2700(0000)
>> GS:ffff88083fc40000(0000) knlGS:0000000000000000
>> Jul 23 21:10:05 positronic18696 CS:  0010 DS: 0000 ES: 0000 CR0:
>> 0000000080050033
>> Jul 23 21:10:05 positronic18696 CR2: 000000010000003b CR3:
>> 000000066ed95000 CR4: 00000000000027e0
>> Jul 23 21:10:05 positronic18696 DR0: 0000000000000001 DR1:
>> 0000000000000002 DR2: 0000000000000001
>> Jul 23 21:10:05 positronic18696 DR3: 000000000000000a DR6:
>> 00000000ffff0ff0 DR7: 0000000000000400
>> Jul 23 21:10:05 positronic18696 Process netstat (pid: 22727,
>> threadinfo ffff8807bf796000, task ffff8807eeeb1000)
>> Jul 23 21:10:05 positronic18696 Stack:
>> Jul 23 21:10:05 positronic18696 ffff8807bf797db8 ffff8807bf797e48
>> ffff8807bf797dc8 0000000000000001
>> Jul 23 21:10:05 positronic18696 ffff8807bf797d58 ffffffff811460dc
>> ffff880813b59c20 ffff8807ed051000
>> Jul 23 21:10:05 positronic18696 0000000000000001 ffff8807ed0642a8
>> 0000000000000040 ffff8807bf797e48
>> Jul 23 21:10:05 positronic18696 Call Trace:
>> Jul 23 21:10:05 positronic18696 [<ffffffff811460dc>] lookup_fast+0x1fc/0x2f0
>> Jul 23 21:10:05 positronic18696 [<ffffffff81147d2d>] path_lookupat+0x12d/0x780
>> Jul 23 21:10:05 positronic18696 [<ffffffff81150d94>] ? dynamic_dname+0x94/0xa0
>> Jul 23 21:10:05 positronic18696 [<ffffffff811483b3>] do_path_lookup+0x33/0x80
>> Jul 23 21:10:05 positronic18696 [<ffffffff811486a9>]
>> user_path_at_empty+0x59/0xb0
>> Jul 23 21:10:05 positronic18696 [<ffffffff81145ad2>] ? path_put+0x22/0x30
>> Jul 23 21:10:05 positronic18696 [<ffffffff81ac3b7e>] ? _raw_spin_lock+0xe/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff8106d29a>] ? lg_local_unlock+0x1a/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff81159264>] ?
>> mntput_no_expire+0x44/0x140
>> Jul 23 21:10:05 positronic18696 [<ffffffff81159381>] ? mntput+0x21/0x40
>> Jul 23 21:10:05 positronic18696 [<ffffffff8113facd>] sys_readlinkat+0x4d/0xc0
>> Jul 23 21:10:05 positronic18696 [<ffffffff8113fb5b>] sys_readlink+0x1b/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff81ac4929>]
>> system_call_fastpath+0x16/0x1b
>> Jul 23 21:10:05 positronic18696 Code: b8 00 00 00 48 8b 50 08 44 3b 32
>> 0f 83 9e 00 00 00 45 89 f6 49 c1 e6 03 4c 03 72 08 49 8b 16 48 85 d2
>> 0f 84 87 00 00 00 48 89 c7 <44> 8b 62 3c e8 b3 67 ea ff 4c 89 ef e8 0b
>> e0 ff ff 85 c0 0f 84
>> Jul 23 21:10:05 positronic18696 RIP  [<ffffffff8119f684>]
>> tid_fd_revalidate+0x84/0x1a0
>> Jul 23 21:10:05 positronic18696 RSP <ffff8807bf797cd8>
>> Jul 23 21:10:05 positronic18696 CR2: 000000010000003b
>> Jul 23 21:10:05 positronic18696 ---[ end trace ccf5b66c39d9275c ]---
>> Jul 23 21:10:05 positronic18696 device vmtap25 entered promiscuous mode
>> Jul 23 21:10:05 positronic18696 BUG: unable to handle kernel paging
>> request at 000000010000003b
>> Jul 23 21:10:05 positronic18696 IP: [<ffffffff8119f684>]
>> tid_fd_revalidate+0x84/0x1a0
>> Jul 23 21:10:05 positronic18696 PGD 7c6184067 PUD 0
>> Jul 23 21:10:05 positronic18696 Oops: 0000 [#8] SMP
>> Jul 23 21:10:05 positronic18696 CPU 7
>> Jul 23 21:10:05 positronic18696 Modules linked in: kvm_intel kvm
>> Jul 23 21:10:05 positronic18696
>> Jul 23 21:10:05 positronic18696 Pid: 22808, comm: netstat Tainted: G
>>    D      3.5.0-rc7-dirty #6 Dell Inc. PowerEdge M600/0MY736
>> Jul 23 21:10:05 positronic18696 RIP: 0010:[<ffffffff8119f684>]
>> [<ffffffff8119f684>] tid_fd_revalidate+0x84/0x1a0
>> Jul 23 21:10:05 positronic18696 RSP: 0018:ffff880771b43cd8  EFLAGS: 00010206
>> Jul 23 21:10:05 positronic18696 RAX: ffff8807ee3bf180 RBX:
>> ffff8807ed065f88 RCX: ffff8807ed051000
>> Jul 23 21:10:05 positronic18696 RDX: 00000000ffffffff RSI:
>> 0000000000000000 RDI: ffff8807ee3bf180
>> Jul 23 21:10:05 positronic18696 RBP: ffff880771b43cf8 R08:
>> ffff8807ed051038 R09: ffffffffffcaffc8
>> Jul 23 21:10:05 positronic18696 R10: ffff880771b43c44 R11:
>> 0000000000000004 R12: ffff8807ed051000
>> Jul 23 21:10:05 positronic18696 R13: ffff8807ee1ab000 R14:
>> ffff8807eb875038 R15: ffff880813b59c20
>> Jul 23 21:10:05 positronic18696 FS:  00007f22e3d5f700(0000)
>> GS:ffff88083fdc0000(0000) knlGS:0000000000000000
>> Jul 23 21:10:05 positronic18696 CS:  0010 DS: 0000 ES: 0000 CR0:
>> 0000000080050033
>> Jul 23 21:10:05 positronic18696 CR2: 000000010000003b CR3:
>> 000000053d5cc000 CR4: 00000000000027e0
>> Jul 23 21:10:05 positronic18696 DR0: 0000000000000001 DR1:
>> 0000000000000002 DR2: 0000000000000001
>> Jul 23 21:10:05 positronic18696 DR3: 000000000000000a DR6:
>> 00000000ffff0ff0 DR7: 0000000000000400
>> Jul 23 21:10:05 positronic18696 Process netstat (pid: 22808,
>> threadinfo ffff880771b42000, task ffff8807e2e36000)
>> Jul 23 21:10:05 positronic18696 Stack:
>> Jul 23 21:10:05 positronic18696 ffff880771b43db8 ffff880771b43e48
>> ffff880771b43dc8 0000000000000001
>> Jul 23 21:10:05 positronic18696 ffff880771b43d58 ffffffff811460dc
>> ffff880813b59c20 ffff8807ed051000
>> Jul 23 21:10:05 positronic18696 0000000000000001 ffff8807ed0642a8
>> 0000000000000040 ffff880771b43e48
>> Jul 23 21:10:05 positronic18696 Call Trace:
>> Jul 23 21:10:05 positronic18696 [<ffffffff811460dc>] lookup_fast+0x1fc/0x2f0
>> Jul 23 21:10:05 positronic18696 [<ffffffff81147d2d>] path_lookupat+0x12d/0x780
>> Jul 23 21:10:05 positronic18696 [<ffffffff81150d94>] ? dynamic_dname+0x94/0xa0
>> Jul 23 21:10:05 positronic18696 [<ffffffff811483b3>] do_path_lookup+0x33/0x80
>> Jul 23 21:10:05 positronic18696 [<ffffffff811486a9>]
>> user_path_at_empty+0x59/0xb0
>> Jul 23 21:10:05 positronic18696 [<ffffffff81145ad2>] ? path_put+0x22/0x30
>> Jul 23 21:10:05 positronic18696 [<ffffffff81ac3b7e>] ? _raw_spin_lock+0xe/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff8106d29a>] ? lg_local_unlock+0x1a/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff81159264>] ?
>> mntput_no_expire+0x44/0x140
>> Jul 23 21:10:05 positronic18696 [<ffffffff81159381>] ? mntput+0x21/0x40
>> Jul 23 21:10:05 positronic18696 [<ffffffff8113facd>] sys_readlinkat+0x4d/0xc0
>> Jul 23 21:10:05 positronic18696 [<ffffffff8113fb5b>] sys_readlink+0x1b/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff81ac4929>]
>> system_call_fastpath+0x16/0x1b
>> Jul 23 21:10:05 positronic18696 Code: b8 00 00 00 48 8b 50 08 44 3b 32
>> 0f 83 9e 00 00 00 45 89 f6 49 c1 e6 03 4c 03 72 08 49 8b 16 48 85 d2
>> 0f 84 87 00 00 00 48 89 c7 <44> 8b 62 3c e8 b3 67 ea ff 4c 89 ef e8 0b
>> e0 ff ff 85 c0 0f 84
>> Jul 23 21:10:05 positronic18696 RIP  [<ffffffff8119f684>]
>> tid_fd_revalidate+0x84/0x1a0
>> Jul 23 21:10:05 positronic18696 RSP <ffff880771b43cd8>
>> Jul 23 21:10:05 positronic18696 CR2: 000000010000003b
>> Jul 23 21:10:05 positronic18696 ---[ end trace ccf5b66c39d9275d ]---
>> Jul 23 21:10:05 positronic18696 BUG: unable to handle kernel paging
>> request at 000000010000003b
>> Jul 23 21:10:05 positronic18696 IP: [<ffffffff8119f684>]
>> tid_fd_revalidate+0x84/0x1a0
>> Jul 23 21:10:05 positronic18696 device vmEtap25 entered promiscuous mode
>> Jul 23 21:10:05 positronic18696 PGD 771aad067 PUD 0
>> Jul 23 21:10:05 positronic18696 Oops: 0000 [#9] SMP
>> Jul 23 21:10:05 positronic18696 CPU 0
>> Jul 23 21:10:05 positronic18696 Modules linked in: kvm_intel kvm
>> Jul 23 21:10:05 positronic18696
>> Jul 23 21:10:05 positronic18696 Pid: 22820, comm: netstat Tainted: G
>>    D      3.5.0-rc7-dirty #6 Dell Inc. PowerEdge M600/0MY736
>> Jul 23 21:10:05 positronic18696 RIP: 0010:[<ffffffff8119f684>]
>> [<ffffffff8119f684>] tid_fd_revalidate+0x84/0x1a0
>> Jul 23 21:10:05 positronic18696 RSP: 0018:ffff8807c628fcd8  EFLAGS: 00010206
>> Jul 23 21:10:05 positronic18696 RAX: ffff8807ee3bf180 RBX:
>> ffff8807ed065f88 RCX: ffff8807ed051000
>> Jul 23 21:10:05 positronic18696 RDX: 00000000ffffffff RSI:
>> 0000000000000000 RDI: ffff8807ee3bf180
>> Jul 23 21:10:05 positronic18696 RBP: ffff8807c628fcf8 R08:
>> ffff8807ed051038 R09: ffffffffffcaffc8
>> Jul 23 21:10:05 positronic18696 R10: ffff8807c628fc44 R11:
>> 0000000000000004 R12: ffff8807ed051000
>> Jul 23 21:10:05 positronic18696 R13: ffff8807ee1ab000 R14:
>> ffff8807eb875038 R15: ffff880813b59c20
>> Jul 23 21:10:05 positronic18696 FS:  00007fe1972b9700(0000)
>> GS:ffff88083fc00000(0000) knlGS:0000000000000000
>> Jul 23 21:10:05 positronic18696 CS:  0010 DS: 0000 ES: 0000 CR0:
>> 0000000080050033
>> Jul 23 21:10:05 positronic18696 CR2: 000000010000003b CR3:
>> 00000007a745d000 CR4: 00000000000027e0
>> Jul 23 21:10:05 positronic18696 DR0: 0000000000000001 DR1:
>> 0000000000000002 DR2: 0000000000000001
>> Jul 23 21:10:05 positronic18696 DR3: 000000000000000a DR6:
>> 00000000ffff0ff0 DR7: 0000000000000400
>> Jul 23 21:10:05 positronic18696 Process netstat (pid: 22820,
>> threadinfo ffff8807c628e000, task ffff8807d1a99000)
>> Jul 23 21:10:05 positronic18696 Stack:
>> Jul 23 21:10:05 positronic18696 ffff8807c628fdb8 ffff8807c628fe48
>> ffff8807c628fdc8 0000000000000001
>> Jul 23 21:10:05 positronic18696 ffff8807c628fd58 ffffffff811460dc
>> ffff880813b59c20 ffff8807ed051000
>> Jul 23 21:10:05 positronic18696 0000000000000001 ffff8807ed0642a8
>> 0000000000000040 ffff8807c628fe48
>> Jul 23 21:10:05 positronic18696 Call Trace:
>> Jul 23 21:10:05 positronic18696 [<ffffffff811460dc>] lookup_fast+0x1fc/0x2f0
>> Jul 23 21:10:05 positronic18696 [<ffffffff81147d2d>] path_lookupat+0x12d/0x780
>> Jul 23 21:10:05 positronic18696 [<ffffffff81150d94>] ? dynamic_dname+0x94/0xa0
>> Jul 23 21:10:05 positronic18696 [<ffffffff811483b3>] do_path_lookup+0x33/0x80
>> Jul 23 21:10:05 positronic18696 [<ffffffff811486a9>]
>> user_path_at_empty+0x59/0xb0
>> Jul 23 21:10:05 positronic18696 [<ffffffff81145ad2>] ? path_put+0x22/0x30
>> Jul 23 21:10:05 positronic18696 [<ffffffff81ac3b7e>] ? _raw_spin_lock+0xe/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff8106d29a>] ? lg_local_unlock+0x1a/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff81159264>] ?
>> mntput_no_expire+0x44/0x140
>> Jul 23 21:10:05 positronic18696 [<ffffffff81159381>] ? mntput+0x21/0x40
>> Jul 23 21:10:05 positronic18696 [<ffffffff8113facd>] sys_readlinkat+0x4d/0xc0
>> Jul 23 21:10:05 positronic18696 [<ffffffff8113fb5b>] sys_readlink+0x1b/0x20
>> Jul 23 21:10:05 positronic18696 [<ffffffff81ac4929>]
>> system_call_fastpath+0x16/0x1b
>> Jul 23 21:10:05 positronic18696 Code: b8 00 00 00 48 8b 50 08 44 3b 32
>> 0f 83 9e 00 00 00 45 89 f6 49 c1 e6 03 4c 03 72 08 49 8b 16 48 85 d2
>> 0f 84 87 00 00 00 48 89 c7 <44> 8b 62 3c e8 b3 67 ea ff 4c 89 ef e8 0b
>> e0 ff ff 85 c0 0f 84
>> Jul 23 21:10:05 positronic18696 RIP  [<ffffffff8119f684>]
>> tid_fd_revalidate+0x84/0x1a0
>> Jul 23 21:10:05 positronic18696 RSP <ffff8807c628fcd8>
>> Jul 23 21:10:05 positronic18696 CR2: 000000010000003b
>> Jul 23 21:10:05 positronic18696 ---[ end trace ccf5b66c39d9275e ]---
>>
>>
>>
>>
>> 2012/7/23 Thadeu Lima de Souza Cascardo <cascardo@...ux.vnet.ibm.com>:
>> > On Sat, Jul 21, 2012 at 12:59:12AM +0200, nicolas prochazka wrote:
>> >> Well done
>> >> 1fd36adcd98c14d2fd97f545293c488775cb2823  :  the bug occurs   ( cf dump )
>> >> 1dce27c5aa6770e9d195f2bb7db1db3d4dde5591 :  the bug not occurs
>> >>
>> >> Regards,
>> >> Nicolas Prochazka.
>> >
>> > Hi, Nicolas.
>> >
>> > I was too hasty in sending you the commit id. There is a bug in 1fd36adc
>> > that is fixed by commit f044db4cb4bf16893812d35b5fbeaaf3e30c9215. Can
>> > you test running f044db4cb4? If you find the bug in there, then we know
>> > that this fix isn't the only one needed for 1fd36adc.
>> >
>> > Regards.
>> > Cascardo.
>> >
>> >>
>> >> dump  / 1fd36adcd98c14d2fd97f545293c488775cb2823
>> >> lloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> VMtap: no IPv6 routers present
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 71 not NULL!
>> >> alloc_fd: slot 121 not NULL!
>> >> alloc_fd: slot 96 not NULL!
>> >> alloc_fd: slot 100 not NULL!
>> >> alloc_fd: slot 110 not NULL!
>> >> alloc_fd: slot 121 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> brE: no IPv6 routers present
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 121 not NULL!
>> >> alloc_fd: slot 142 not NULL!
>> >> alloc_fd: slot 153 not NULL!
>> >> alloc_fd: slot 153 not NULL!
>> >> alloc_fd: slot 153 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 70 not NULL!
>> >> alloc_fd: slot 100 not NULL!
>> >> alloc_fd: slot 102 not NULL!
>> >> alloc_fd: slot 36 not NULL!
>> >> alloc_fd: slot 36 not NULL!
>> >> alloc_fd: slot 36 not NULL!
>> >> alloc_fd: slot 36 not NULL!
>> >> alloc_fd: slot 36 not NULL!
>> >> alloc_fd: slot 106 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 100 not NULL!
>> >> alloc_fd: slot 100 not NULL!
>> >> alloc_fd: slot 100 not NULL!
>> >> alloc_fd: slot 100 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 36 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 106 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 36 not NULL!
>> >> alloc_fd: slot 100 not NULL!
>> >> alloc_fd: slot 36 not NULL!
>> >> alloc_fd: slot 36 not NULL!
>> >> alloc_fd: slot 36 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 36 not NULL!
>> >> alloc_fd: slot 36 not NULL!
>> >> alloc_fd: slot 36 not NULL!
>> >> alloc_fd: slot 36 not NULL!
>> >> alloc_fd: slot 36 not NULL!
>> >> alloc_fd: slot 36 not NULL!
>> >> alloc_fd: slot 36 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 100 not NULL!
>> >> alloc_fd: slot 100 not NULL!
>> >> alloc_fd: slot 100 not NULL!
>> >> alloc_fd: slot 100 not NULL!
>> >> alloc_fd: slot 100 not NULL!
>> >> alloc_fd: slot 100 not NULL!
>> >> alloc_fd: slot 100 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 100 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 68 not NULL!
>> >> alloc_fd: slot 100 not NULL!
>> >> alloc_fd: slot 100 not NULL!
>> >> ------------[ cut here ]------------
>> >> kernel BUG at fs/open.c:873!
>> >> invalid opcode: 0000 [#1] SMP
>> >> CPU 0
>> >> Modules linked in: kvm_intel kvm
>> >>
>> >> then BUG paging request as usual
>> >>
>> >>
>> >> 2012/7/20 Thadeu Lima de Souza Cascardo <cascardo@...ux.vnet.ibm.com>:
>> >> > On Fri, Jul 20, 2012 at 10:52:40PM +0200, nicolas prochazka wrote:
>> >> >> Hello
>> >> >> the problem is occured with  :
>> >> >> - linux kernel 3.4.5    i do not test with 3.4.0 / 1 / 2 / 3 / 4    ,
>> >> >> but i can if you want
>> >> >> - linux kernel 3.5rc6 rc7  / do not test with other rc.
>> >> >>
>> >> >> the problem is not occured with :
>> >> >> linux kernel 3.3.4 / 3.3.8
>> >> >>
>> >> >> These servers are used for :
>> >> >> - starting a lot of virtual machine with qemu-kvm ( ~ 40 )   ( lot of
>> >> >> select i think)
>> >> >> - do a lot of network tests with openvswitch
>> >> >>
>> >> >> I can test a kernel 3.4.x before and after a commit id (?) to find a regression.
>> >> >>
>> >> >> Regards,
>> >> >> Nicolas.
>> >> >>
>> >> >
>> >> > Can you try this commit 1fd36adcd98c14d2fd97f545293c488775cb2823? And
>> >> > the commit before it?
>> >> >
>> >> >>
>> >> >> 2012/7/20 Thadeu Lima de Souza Cascardo <cascardo@...ux.vnet.ibm.com>:
>> >> >> > On Fri, Jul 20, 2012 at 09:21:53AM -0400, Dave Jones wrote:
>> >> >> >> On Fri, Jul 20, 2012 at 11:56:06AM +0200, nicolas prochazka wrote:
>> >> >> >>
>> >> >> >>  > [ 2384.900061] BUG: unable to handle kernel paging request at 000000010000002f
>> >> >> >>
>> >> >> >> That '1' looks like a random bit flip. Try running memtest86.
>> >> >> >>
>> >> >> >
>> >> >> > Looks more a 32-bit value of 1 followed by a 32-bit value of 0x2f. Most
>> >> >> > likely a pointer to some other piece of a struct. However, taking a look
>> >> >> > at fs/files.c code, nothing seems suspicious.
>> >> >> >
>> >> >> > Nicolas, it wasn't clear to me if you had problems with 3.4 too. There
>> >> >> > has been some changes in fs/files.c on 3.4-rc1 in the piece of code
>> >> >> > where you hit the problem.
>> >> >> >
>> >> >> > What does your system exercise? Any chance you are using a lot of
>> >> >> > select, which has also been changed in those same patches to fs/files.c?
>> >> >> >
>> >> >> > Regards.
>> >> >> > Cascardo.
>> >> >> >
>> >> >> >
>> >> >> >>  > [ 2384.910010] Pid: 23838, comm: queue.sh Tainted: G      D W
>> >> >> >>
>> >> >> >> This wasn't the first problem either.
>> >> >> >>
>> >> >> >>  > [ 2397.885344] BUG: unable to handle kernel paging request at 000000010000003b
>> >> >> >>
>> >> >> >> Looks like the same flipped bit.
>> >> >> >>
>> >> >> >>       Dave
>> >> >> >>
>> >> >> >> --
>> >> >> >> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
>> >> >> >> the body of a message to majordomo@...r.kernel.org
>> >> >> >> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>> >> >> >> Please read the FAQ at  http://www.tux.org/lkml/
>> >> >> >>
>> >> >> >
>> >> >>
>> >> >
>> >> --
>> >> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
>> >> the body of a message to majordomo@...r.kernel.org
>> >> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>> >> Please read the FAQ at  http://www.tux.org/lkml/
>> >>
>> >
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
>> the body of a message to majordomo@...r.kernel.org
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>> Please read the FAQ at  http://www.tux.org/lkml/
>>
>>
>
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