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SubjectRe: Kernel Panic in MPT SAS on 2.6.24 (and 2.6.23.14, 2.6.23.9)
Am Friday, den  8 February hub Maximilian Wilhelm folgendes in die Tasten:

> Just noticed that Eric's address was wrong, so resend with corrected Cc.

> Eric, my intial report was http://lkml.org/lkml/2008/2/6/300
>
> > Am Thursday, den 7 February hub Krzysztof Oledzki folgendes in die Tasten:
> >
> > Hi!
> >
> > > >While installing my new firewall I got the following kernel panic in
> > > >the MPT SAS driver which I need for the disks.
> >
> > > >The first kernel I bootet was 2.6.23.14 which did panic so I tried a
> > > >2.6.24 which panics, too. Our usual FAI kernel (2.6.23.9) is also
> > > >affected.
> >
> > > Could you please try 2.6.22-stable?
> >
> > Yes it works :-/
> >
> > I've put some things which on the web which might be helpful:
> >
> > dmesg http://files.rfc2324.org/mptsas_panic/2.6.22-dmesg
> > lspci -v http://files.rfc2324.org/mptsas_panic/2.6.22-lspci-v
> > .config http://files.rfc2324.org/mptsas_panic/2.6.22-config
> >
> > I'll search for the last working kernel and try to break it down to a
> > commit tommorow when I can get a serial console or direct access.
> > The Java driven console redirection is everything else than fulfilling :-(
> >
> > > It looks *very* similar to my problem:
> >
> > > http://bugzilla.kernel.org/show_bug.cgi?id=9909
> >
> > It seems to be the same controller:
> >
> > 01:00.0 SCSI storage controller: LSI Logic / Symbios Logic SAS1068E PCI-Express Fusion-MPT SAS (rev 08)
> > Subsystem: Dell Unknown device 1f10
> > Flags: bus master, fast devsel, latency 0, IRQ 16
> > I/O ports at ec00 [size=256]
> > Memory at fc8fc000 (64-bit, non-prefetchable) [size=16K]
> > Memory at fc8e0000 (64-bit, non-prefetchable) [size=64K]
> > Expansion ROM at fc900000 [disabled] [size=1M]
> > Capabilities: [50] Power Management version 2
> > Capabilities: [68] Express Endpoint IRQ 0
> > Capabilities: [98] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0 Enable-
> > Capabilities: [b0] MSI-X: Enable- Mask- TabSize=1

I did a git bisect between v2.6.22 v2.6.23 and it seems that
6cb8f91320d3e720351c21741da795fed580b21b
introduced some badness.

---snip---
Fusion MPT base driver 3.04.05
Copyright (c) 1999-2007 LSI Logic Corporation
Fusion MPT SAS Host driver 3.04.05
mptbase: Initiating ioc0 bringup
ioc0: SAS1068E: Capabilities={Initiator}
scsi0 : ioc0: LSISAS1068E, FwRev=00142e00h, Ports=1, MaxQ=511, IRQ=16
scsi 0:0:0:0: Direct-Access SEAGATE ST973402SS S207 PQ: 0 ANSI: 5
scsi 0:0:1:0: Direct-Access SEAGATE ST973402SS S207 PQ: 0 ANSI: 5
BUG: unable to handle kernel NULL pointer dereference at virtual address 00000028
printing eip:
c014b8ca
*pde = 00000000
Oops: 0000 [#1]
SMP
Modules linked in:
CPU: 6
EIP: 0060:[<c014b8ca>] Not tainted VLI
EFLAGS: 00010046 (2.6.22-g6cb8f913 #13)
EIP is at __kmalloc+0x35/0x5f
eax: 00000006 ebx: 00000246 ecx: c03fa820 edx: 000000d0
esi: 00000010 edi: 00000000 ebp: c23a4000 esp: c2143dbc
ds: 007b es: 007b fs: 00d8 gs: 0000 ss: 0068
Process swapper (pid: 1, ti=c2142000 task=c2141670 task.ti=c2142000)
Stack: c22a3e80 00000000 c013cba9 c22a3e80 c22a3e80 c2399800 00000000 c02bcb67
00000020 c2399800 00100100 00200200 00000000 00200200 fffefe48 c02ba15d
c2399800 c2190000 c2143e1c 023a4000 00000001 0000ffff 000a0001 c02b0000
Call Trace:
[<c013cba9>] __kzalloc+0xd/0x34
[<c02bcb67>] mptsas_sas_expander_pg0+0x110/0x181
[<c02ba15d>] mpt_timer_expired+0x0/0x28
[<c02b0000>] megasas_lookup_instance+0x9/0x2e
[<c02bd2ff>] mptsas_probe_expander_phys+0x42/0x395
[<c02ba15d>] mpt_timer_expired+0x0/0x28
[<c02ba15d>] mpt_timer_expired+0x0/0x28
[<c02be9b0>] mptsas_probe+0x309/0x387
[<c021cf6e>] pci_device_probe+0x36/0x57
[<c023f8a6>] driver_probe_device+0xe1/0x15f
[<c034c3fd>] klist_next+0x4b/0x6b
[<c023f9b6>] __driver_attach+0x0/0x79
[<c023f9fc>] __driver_attach+0x46/0x79
[<c023ee7b>] bus_for_each_dev+0x33/0x55
[<c023f70a>] driver_attach+0x16/0x18
[<c023f9b6>] __driver_attach+0x0/0x79
[<c023f15f>] bus_add_driver+0x6d/0x16d
[<c021d0aa>] __pci_register_driver+0x48/0x74
[<c043e7e4>] kernel_init+0x14a/0x2ac
[<c0102402>] ret_from_fork+0x6/0x1c
[<c043e69a>] kernel_init+0x0/0x2ac
[<c043e69a>] kernel_init+0x0/0x2ac
[<c01030d7>] kernel_thread_helper+0x7/0x10
=======================
Code: 3f c0 85 c0 75 05 eb 1a 83 c1 0c 3b 01 77 f9 f6 c2 01 74 05 8b 71 08 eb 03 8b 71 04 31 c0 85 f6 74 30 9c 5b fa 64 a1 08 b0 46 c0 <8b> 0c 86 83 39 00 74 12 c7 41 0c 01 00 00 00 8b 01 48 89 01 8b
EIP: [<c014b8ca>] __kmalloc+0x35/0x5f SS:ESP 0068:c2143dbc
---snip---

A simple git revert did not work on the current git and I don't want
to fiddle around in this area, so I couldn't test further.

Ciao
Max
--
Follow the white penguin.


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