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Date: Wed, 10 Dec 2008 06:54:14 -0800
From: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
To: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>, linux-next@vger.kernel.org,
       LKML <linux-kernel@vger.kernel.org>, dm-devel@redhat.com,
       tglx@linutronix.de, mel@csn.ul.ie
Subject: Re: [BUG] linux-next: 20081209 - kernel bug at
	__rcu_process_callbacks, while booting up
Message-ID: <20081210145414.GA6945@linux.vnet.ibm.com>
Reply-To: paulmck@linux.vnet.ibm.com
References: <20081209185237.8bb715d7.sfr@canb.auug.org.au> <20081210115721.GB6107@linux.vnet.ibm.com>
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On Wed, Dec 10, 2008 at 05:27:21PM +0530, Kamalesh Babulal wrote:
> Hi,
> 
> 	Kernel bug is hit while booting up the next-20081208/09 kernels over
> the x86_64 box. The IP is pointing to 0x0 and its stuck at
> __rcu_process_callbacks.

Kernel config?

							Thanx, Paul

> Activating logical volumes
>   4 logical volume(s) in volume group "VolGroup00"BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
> IP: [<0000000000000000>] 0x0
> PGD 3e8ad067 PUD 3e8ac067 PMD 0 
> Oops: 0010 [#1] SMP 
> last sysfs file: /sys/block/dm-1/removable
> CPU 3 
> Modules linked in:
> Pid: 0, comm: swapper Not tainted 2.6.28-rc7-next-20081209-autotest #1
> RIP: 0010:[<0000000000000000>]  [<0000000000000000>] 0x0
> RSP: 0018:ffff88003fa73ef0  EFLAGS: 00010286
> RAX: ffff88003eae0500 RBX: ffff880001047040 RCX: ffffffff80268f66
> RDX: 0000000000000000 RSI: ffffe20000fab800 RDI: ffff88003eae0500
> RBP: 0000000000000000 R08: ffff880001047040 R09: ffffffff80853950
> R10: 0000000000000038 R11: ffffffff8032222d R12: 0000000000000005
> R13: 0000000000000038 R14: 0000000000000009 R15: 0000000000000018
> FS:  000000000066d870(0000) GS:ffff88003f803f00(0000) knlGS:0000000000000000
> CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
> CR2: 0000000000000000 CR3: 000000003e8a9000 CR4: 00000000000006e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Process swapper (pid: 0, threadinfo ffff88003fa64000, task ffff88003f9dde00)
> Stack:
>  ffffffff80268f66 ffff88003fa73ef8 0000000000000100 0000000000000001
>  ffffffff807400b8 0000000000000038 ffffffff80269001 0000000000000018
>  ffffffff8023b891 ffffffff8020e79e 0000000000000046 ffff88003fa73f80
> Call Trace:
>  <IRQ> <0> [<ffffffff80268f66>] __rcu_process_callbacks+0x14e/0x1c3
>  [<ffffffff80269001>] rcu_process_callbacks+0x26/0x4a
>  [<ffffffff8023b891>] __do_softirq+0x76/0x136
>  [<ffffffff8020e79e>] profile_pc+0x21/0x5b
>  [<ffffffff8020d03c>] call_softirq+0x1c/0x28
>  [<ffffffff8020e091>] do_softirq+0x2c/0x6c
>  [<ffffffff8021e018>] smp_apic_timer_interrupt+0x93/0xac
>  [<ffffffff8020ca73>] apic_timer_interrupt+0x13/0x20
>  <EOI> <0>Code:  Bad RIP value.
> RIP  [<0000000000000000>] 0x0
>  RSP <ffff88003fa73ef0>
> CR2: 0000000000000000
> ---[ end trace 69ecde41a682e571 ]---
> Kernel panic - not syncing: Fatal exception in interrupt
> Pid: 0, comm: swapper Tainted: G      D    2.6.28-rc7-next-20081209-autotest #1
> Call Trace:
> Mounting root fi <IRQ> lesystem.
>  [<ffffffff80236e7d>] panic+0x86/0x144
>  [<ffffffff8020ca73>] apic_timer_interrupt+0x13/0x20
>  [<ffffffff8051fd57>] oops_end+0x61/0xad
>  [<ffffffff8051fd96>] oops_end+0xa0/0xad
>  [<ffffffff805215ac>] do_page_fault+0x748/0x801
>  [<ffffffff8051f3af>] page_fault+0x1f/0x30
>  [<ffffffff8032222d>] selinux_cred_free+0x0/0x14
> BUG: unable to handle kernel NULL pointer dereference at 0000000000000002
> IP: [<ffffffff802926da>] kmem_cache_alloc+0x6a/0x99
> PGD 3e8ad067 PUD 3e8ac067 PMD 0 
> Oops: 0000 [#2] SMP 
> last sysfs file: /sys/block/ram7/removable
> CPU 2 
> Modules linked in:
> Pid: 1, comm: init Tainted: G      D    2.6.28-rc7-next-20081209-autotest #1
> RIP: 0010:[<ffffffff802926da>]  [<ffffffff802926da>] kmem_cache_alloc+0x6a/0x99
> RSP: 0018:ffff88003f9d7db8  EFLAGS: 00010002
> RAX: 0000000000000000 RBX: 0000000000000246 RCX: 0000000000000001
> RDX: ffff880001037800 RSI: 0000000000000002 RDI: ffffffff80854f70
> RBP: 0000000000000020 R08: 0000000000000000 R09: ffffffff80859a80
> R10: 0000000000000001 R11: ffff88003f426018 R12: ffffffff80854f70
> R13: ffffffff80253ab1 R14: 0000000000000080 R15: ffffffff802b4141
> FS:  000000000066d870(0063) GS:ffff88003f803c80(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> CR2: 0000000000000002 CR3: 000000003e8a9000 CR4: 00000000000006e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Process init (pid: 1, threadinfo ffff88003f9d6000, task ffff88003f9d8000)
> Stack:
>  00000000ffffffff ffff88003f426000 ffffffff80859a80 ffffffff80859a80
>  0000000000000000 ffffffff80253ab1 00000000006f1db0 0000000000000000
>  ffff88003eb6a2f8 ffff88003f9d7e48 0000000000000000 01ff88003e97c400
> Call Trace:
>  [<ffffffff80253ab1>] ? smp_call_function_many+0xdb/0x220
>  [<ffffffff802704ca>] ? do_writepages+0x23/0x30
>  [<ffffffff802b4141>] ? invalidate_bh_lru+0x0/0x42
>  [<ffffffff80253c16>] ? smp_call_function+0x20/0x24
>  [<ffffffff8023b483>] ? on_each_cpu+0x10/0x22
>  [<ffffffff802b919b>] ? kill_bdev+0x1b/0x30
>  [<ffffffff802b9892>] ? __blkdev_put+0x54/0x151
>  [<ffffffff8029899f>] ? __fput+0xe7/0x1b4
>  [<ffffffff802961ea>] ? filp_close+0x5e/0x66
>  [<ffffffff8029627f>] ? sys_close+0x8d/0xd1
>  [<ffffffff8020bf5b>] ? system_call_fastpath+0x16/0x1b
> Code: 18 03 00 00 48 8b 32 44 8b 72 18 48 85 f6 75 18 49 89 d0 89 ee 4c 89 e9 83 ca ff 4c 89 e7 e8 57 f8 ff ff 48 89 c6 eb 0a 8b 42 14 <48> 8b 04 c6 48 89 02 53 9d 31 c0 c1 ed 0f 48 85 f6 0f 95 c0 85 
> RIP  [<ffffffff802926da>] kmem_cache_alloc+0x6a/0x99
>  RSP <ffff88003f9d7db8>
> CR2: 0000000000000002
> ---[ end trace 69ecde41a682e571 ]---
> Kernel panic - not syncing: Attempted to kill init!
> Pid: 1, comm: init Tainted: G      D    2.6.28-rc7-next-20081209-autotest #1
> Call Trace:
>  [<ffffffff80236e7d>] panic+0x86/0x144
>  [<ffffffff802abbfb>] mntput_no_expire+0x1e/0x139
>  [<ffffffff802961ea>] filp_close+0x5e/0x66
>  [<ffffffff8023870d>] exit_fs+0x35/0x46
>  [<ffffffff80239b7a>] do_exit+0x75/0x766
>  [<ffffffff8051fd9e>] oops_end+0xa8/0xad
>  [<ffffffff805215ac>] do_page_fault+0x748/0x801
>  [<ffffffff80253ab1>] smp_call_function_many+0xdb/0x220
>  [<ffffffff802b4141>] invalidate_bh_lru+0x0/0x42
>  [<ffffffff8051f3af>] page_fault+0x1f/0x30
>  [<ffffffff802b4141>] invalidate_bh_lru+0x0/0x42
>  [<ffffffff80253ab1>] smp_call_function_many+0xdb/0x220
>  [<ffffffff802926da>] kmem_cache_alloc+0x6a/0x99
>  [<ffffffff80253ab1>] smp_call_function_many+0xdb/0x220
>  [<ffffffff802704ca>] do_writepages+0x23/0x30
>  [<ffffffff802b4141>] invalidate_bh_lru+0x0/0x42
>  [<ffffffff80253c16>] smp_call_function+0x20/0x24
>  [<ffffffff8023b483>] on_each_cpu+0x10/0x22
>  [<ffffffff802b919b>] kill_bdev+0x1b/0x30
>  [<ffffffff802b9892>] __blkdev_put+0x54/0x151
>  [<ffffffff8029899f>] __fput+0xe7/0x1b4
>  [<ffffffff802961ea>] filp_close+0x5e/0x66
>  [<ffffffff8029627f>] sys_close+0x8d/0xd1
>  [<ffffffff8020bf5b>] system_call_fastpath+0x16/0x1b
> BUG: unable to handle kernel NULL pointer dereference at 0000000000000002
> IP: [<ffffffff802926da>] kmem_cache_alloc+0x6a/0x99
> PGD 0 
> Oops: 0000 [#3] SMP 
> last sysfs file: /sys/block/ram7/removable
> CPU 2 
> Modules linked in:
> Pid: 1, comm: init Tainted: G      D    2.6.28-rc7-next-20081209-autotest #1
> RIP: 0010:[<ffffffff802926da>]  [<ffffffff802926da>] kmem_cache_alloc+0x6a/0x99
> RSP: 0018:ffff88003f9d7a58  EFLAGS: 00010002
> RAX: 0000000000000000 RBX: 0000000000000246 RCX: 0000000000000001
> RDX: ffff880001037800 RSI: 0000000000000002 RDI: ffffffff80854f70
> RBP: 0000000000000020 R08: ffffffff8052a5c0 R09: ffffffff80859a80
> R10: 0000000000000000 R11: ffffffff8067c887 R12: ffffffff80854f70
> R13: ffffffff80253ab1 R14: 0000000000000080 R15: ffffffff80211dd3
> FS:  000000000066d870(0000) GS:ffff88003f803c80(0000) knlGS:0000000000000000
> CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> CR2: 0000000000000002 CR3: 0000000000201000 CR4: 00000000000006e0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Process init (pid: 1, threadinfo ffff88003f9d6000, task ffff88003f9d8000)
> Stack:
>  00000000ffffffff ffff88003f9d8000 ffffffff80859a80 ffffffff80859a80
>  0000000000000000 ffffffff80253ab1 ffffffff8052a5c0 ffff88003fa3bfc0
>  0000000000000000 ffffffff8020e525 0000000000000010 000000003e943800
> Call Trace:
>  [<ffffffff80253ab1>] ? smp_call_function_many+0xdb/0x220
>  [<ffffffff8020e525>] ? dump_trace+0x223/0x232
>  [<ffffffff80253c16>] ? smp_call_function+0x20/0x24
>  [<ffffffff8021ccc1>] ? native_smp_send_stop+0x1a/0x26
>  [<ffffffff80236e91>] ? panic+0x9a/0x144
>  [<ffffffff802abbfb>] ? mntput_no_expire+0x1e/0x139
>  [<ffffffff802961ea>] ? filp_close+0x5e/0x66
>  [<ffffffff8023870d>] ? exit_fs+0x35/0x46
>  [<ffffffff80239b7a>] ? do_exit+0x75/0x766
>  [<ffffffff8051fd9e>] ? oops_end+0xa8/0xad
>  [<ffffffff805215ac>] ? do_page_fault+0x748/0x801
>  [<ffffffff80253ab1>] ? smp_call_function_many+0xdb/0x220
>  [<ffffffff802b4141>] ? invalidate_bh_lru+0x0/0x42
>  [<ffffffff8051f3af>] ? page_fault+0x1f/0x30
>  [<ffffffff802b4141>] ? invalidate_bh_lru+0x0/0x42
>  [<ffffffff80253ab1>] ? smp_call_function_many+0xdb/0x220
>  [<ffffffff802926da>] ? kmem_cache_alloc+0x6a/0x99
>  [<ffffffff80253ab1>] ? smp_call_function_many+0xdb/0x220
>  [<ffffffff802704ca>] ? do_writepages+0x23/0x30
>  [<ffffffff802b4141>] ? invalidate_bh_lru+0x0/0x42
>  [<ffffffff80253c16>] ? smp_call_function+0x20/0x24
>  [<ffffffff8023b483>] ? on_each_cpu+0x10/0x22
>  [<ffffffff802b919b>] ? kill_bdev+0x1b/0x30
>  [<ffffffff802b9892>] ? __blkdev_put+0x54/0x151
>  [<ffffffff8029899f>] ? __fput+0xe7/0x1b4
>  [<ffffffff802961ea>] ? filp_close+0x5e/0x66
>  [<ffffffff8029627f>] ? sys_close+0x8d/0xd1
>  [<ffffffff8020bf5b>] ? system_call_fastpath+0x16/0x1b
> Code: 18 03 00 00 48 8b 32 44 8b 72 18 48 85 f6 75 18 49 89 d0 89 ee 4c 89 e9 83 ca ff 4c 89 e7 e8 57 f8 ff ff 48 89 c6 eb 0a 8b 42 14 <48> 8b 04 c6 48 89 02 53 9d 31 c0 c1 ed 0f 48 85 f6 0f 95 c0 85 
> RIP  [<ffffffff802926da>] kmem_cache_alloc+0x6a/0x99
>  RSP <ffff88003f9d7a58>
> CR2: 0000000000000002
> ---[ end trace 69ecde41a682e571 ]---
> Fixing recursive fault but reboot is needed!
>  [<ffffffff80268f66>] __rcu_process_callbacks+0x14e/0x1c3
>  [<ffffffff80268f66>] __rcu_process_callbacks+0x14e/0x1c3
>  [<ffffffff80269001>] rcu_process_callbacks+0x26/0x4a
>  [<ffffffff8023b891>] __do_softirq+0x76/0x136
>  [<ffffffff8020e79e>] profile_pc+0x21/0x5b
>  [<ffffffff8020d03c>] call_softirq+0x1c/0x28
>  [<ffffffff8020e091>] do_softirq+0x2c/0x6c
>  [<ffffffff8021e018>] smp_apic_timer_interrupt+0x93/0xac
>  [<ffffffff8020ca73>] apic_timer_interrupt+0x13/0x20
>  <EOI> 
> 
> -- 
> Thanks & Regards,
> Kamalesh Babulal,
> Linux Technology Center,
> IBM, ISTL.
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