linux-kernel - Re: [BUG] 2.6.23-rc3-mm1 Oops: Machine check, sig: 7 [#1]

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Message-Id: <20070822090858.b8f62539.akpm@linux-foundation.org>
Date:	Wed, 22 Aug 2007 09:08:58 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>
Cc:	linux-kernel@...r.kernel.org,
	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Subject: Re: [BUG] 2.6.23-rc3-mm1 Oops: Machine check, sig: 7 [#1]

On Wed, 22 Aug 2007 18:52:05 +0530 Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com> wrote:

> Hi Andrew,
> 
> Following oops is generated on ppc64 machine while booting with
> the 2.6.23-rc3-mm1 kernel.
> 
> ===========================================================
> [    5.341499] PowerMac i2c bus u3 0 registered
> [    5.354201] TCP cubic registered
> [    5.364880] input: PMU as /class/input/input0
> [    5.400152] RAMDISK: cramfs filesystem found at block 0
> [    5.414336] RAMDISK: Loading 4688KiB [1 disk] into ram disk... done.
> [    5.533921] VFS: Mounted root (cramfs filesystem) readonly.
> [    5.549385] Machine check in kernel mode.
> [    5.560880] Caused by (from SRR1=9000000000009032): Transfer error 
> ack signal
> [    5.578607] Oops: Machine check, sig: 7 [#1]
> [    5.590736] SMP NR_CPUS=32 NUMA PowerMac
> [    5.602052] Modules linked in:
> [    5.611551] NIP: c000000000279ee0 LR: c0000000000ab1c4 CTR: 
> c000000000092cc8
> [    5.629323] REGS: c00000000dcdf040 TRAP: 0200   Not tainted  
> (2.6.23-rc3-mm1-autokern1)
> [    5.653218] MSR: 9000000000009032 <EE,ME,IR,DR>  CR: 24000022  XER: 
> 00000000
> [    5.671260] TASK = c00000000e176000[774] 'linuxrc' THREAD: 
> c00000000dcdc000 CPU: 0
> [    5.690056] GPR00: c00000000e207b08 c00000000dcdf2c0 c0000000005bfac0 
> c00000000e207848
> [    5.714493] GPR04: c00000000e10fb08 c00000000e207900 c00000000e2078f8 
> c00000000e2078f8
> [    5.739017] GPR08: 0000000000000000 c00000000e2078f8 c00000000e2078f8 
> 0000000000000000
> [    5.763600] GPR12: c00000000e2078f8 c000000000505280 0000000010028230 
> 0000000000000000
> [    5.788276] GPR16: 0000000000000002 0000000000000000 0000000000000000 
> 0000000000000802
> [    5.813137] GPR20: 0000000000029000 0000000000000029 0000000000000000 
> 0000000000000001
> [    5.838609] GPR24: 0000000000000000 c00000000e10fb00 c00000000e2078f8 
> c00000000e10fb08
> [    5.864713] GPR28: c00000000e207848 c00000000e207848 c00000000055af48 
> c00000000e207b08
> [    5.897143] NIP [c000000000279ee0] .rb_insert_color+0x5c/0x194
> [    5.914305] LR [c0000000000ab1c4] .__vma_link_rb+0x30/0x44
> [    5.930736] Call Trace:
> [    5.941092] [c00000000dcdf2c0] [c00000000e004580] 0xc00000000e004580 
> (unreliable)
> [    5.966930] [c00000000dcdf360] [c0000000000ab1c4] 
> .__vma_link_rb+0x30/0x44
> [    5.986182] [c00000000dcdf3e0] [c0000000000ab230] .__vma_link+0x58/0x78
> [    6.004896] [c00000000dcdf460] [c0000000000ab79c] .vma_link+0x94/0x1b8
> [    6.023345] [c00000000dcdf510] [c0000000000ada44] 
> .mmap_region+0x330/0x4d8
> [    6.042415] [c00000000dcdf620] [c000000000011fcc] .elf_map+0xb8/0x19c
> [    6.060511] [c00000000dcdf6d0] [c000000000013064] 
> .load_elf_binary+0xfb4/0x1a4c
> [    6.085519] [c00000000dcdf830] [c0000000000d0c1c] 
> .search_binary_handler+0x104/0x310
> [    6.111417] [c00000000dcdf8e0] [c000000000111cc0] 
> .load_script+0x278/0x2b4
> [    6.130289] [c00000000dcdfa10] [c0000000000d0c1c] 
> .search_binary_handler+0x104/0x310
> [    6.155961] [c00000000dcdfac0] [c0000000000d0fac] .do_execve+0x184/0x244
> [    6.174367] [c00000000dcdfb70] [c00000000000f278] .sys_execve+0x70/0xf4
> [    6.192490] [c00000000dcdfc10] [c00000000000852c] syscall_exit+0x0/0x40
> [    6.210486] --- Exception: c01 at .kernel_execve+0x8/0x14
> [    6.226093]     LR = .do_linuxrc+0xa4/0xc0
> [    6.239060] [c00000000dcdff00] [c0000000004b31f4] 
> .do_linuxrc+0x90/0xc0 (unreliable)
> [    6.263900] [c00000000dcdff90] [c000000000023ef4] 
> .kernel_thread+0x4c/0x68
> [    6.282270] Instruction dump:
> [    6.292794] e97f0010 7fa95800 409e0070 e97f0008 2fab0000 419e0010 
> e80b0000 780807e1
> [    6.317509] 4182006c eba90008 7fbde000 409e0018 <7d234b78> 7f64db78 
> 7d3c4b78 4bffff1d
> 

It would be great if you could fix that wordwrapping problem.

Dunno, it beats me.  powerpc booted OK for me.  Ben, have you been playing
around in powerpc mmap code?  How come the oops claims it died at
kernel_execve+0x8/0x14 but the call trace points up into the vma management
code?

Kamalesh, can you send the config please?
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