[OOPS] 2.6.17-rc3 on an mpc8241

[OOPS] 2.6.17-rc3 on an mpc8241

[Guennadi Liakhovetski]

"dhclient eth1" (zd1211rw driver) caused the following:

Oops: kernel access of bad area, sig: 11 [#1]
NIP: C004151C LR: C0039850 CTR: 00000000
REGS: c6a15c70 TRAP: 0300   Not tainted  (2.6.17-rc3-kuroboxHG)
MSR: 00009032 <EE,ME,IR,DR>  CR: 44000488  XER: 00000000
DAR: 00000038, DSISR: 20000000
TASK = c7d4a850[2546] 'dhclient' THREAD: c6a14000
GPR00: 00030017 C6A15D20 C7D4A850 00000038 C03CBF00 00000000 00000038 C6A15D50 
GPR08: 00000000 00000004 00000000 00000004 00000000 100383F4 C76557C8 00000001 
GPR16: 00000000 C6A15D50 00000000 C6A15EA0 C6A15DF0 00000001 00000000 C75C7F00 
GPR24: 30017000 00000000 00000000 C03CBF00 C7655868 30017000 C6A45E07 00000038 
NIP [C004151C] put_page+0x0/0x40
LR [C0039850] do_generic_mapping_read+0x354/0x480
Call Trace:
[C6A15D20] [C0040EB0] page_cache_readahead+0xd0/0x224 (unreliable)
[C6A15D40] [C0039838] do_generic_mapping_read+0x33c/0x480
[C6A15DE0] [C003C004] __generic_file_aio_read+0x1b4/0x208
[C6A15E30] [C003C224] generic_file_aio_read+0x3c/0x5c
[C6A15E40] [C0059768] do_sync_read+0xc4/0x134
[C6A15EF0] [C0059874] vfs_read+0x9c/0x1a4
[C6A15F10] [C0059CA0] sys_read+0x4c/0x90
[C6A15F40] [C0004220] ret_from_syscall+0x0/0x38
Instruction dump:
912700e4 7d000124 4bffc4a9 80010014 38210010 7c0803a6 4e800020 812700e8 
3929ffff 912700e8 7d000124 4bffffdc <80030000> 700a4000 40820034 80030004 

Corrupted stack?...

Thanks
Guennadi
---
Guennadi Liakhovetski

Re: [OOPS] 2.6.17-rc3 on an mpc8241

[Johannes Berg]

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On Wed, 2006-06-14 at 22:48 +0200, Guennadi Liakhovetski wrote:
> Corrupted stack?...

Looks weird.
Enable slab debugging? :)

johannes

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Re: [OOPS] 2.6.17-rc3 on an mpc8241

[Guennadi Liakhovetski]

On Wed, 14 Jun 2006, Johannes Berg wrote:

> On Wed, 2006-06-14 at 22:48 +0200, Guennadi Liakhovetski wrote:
> > Corrupted stack?...
> 
> Looks weird.
> Enable slab debugging? :)

Compiling 2.6.17-rc5... And I don't know how easy it is to reproduce... 
Once I have the kernel ready will try...

Thanks
Guennadi
---
Guennadi Liakhovetski

Re: [OOPS] 2.6.17-rc3 on an mpc8241

[Guennadi Liakhovetski]

On Wed, 14 Jun 2006, Guennadi Liakhovetski wrote:

> On Wed, 14 Jun 2006, Johannes Berg wrote:
> 
> > On Wed, 2006-06-14 at 22:48 +0200, Guennadi Liakhovetski wrote:
> > > Corrupted stack?...
> > 
> > Looks weird.
> > Enable slab debugging? :)
> 
> Compiling 2.6.17-rc5... And I don't know how easy it is to reproduce... 
> Once I have the kernel ready will try...

Ghm, ok, I know what that was - the very same bug I myself reported 
earlier in asm-offsets... how do you say it in English - twice in the same 
trap?:-)

Thanks
Guennadi
---
Guennadi Liakhovetski

Re: [OOPS] 2.6.17-rc3 on an mpc8241

[Johannes Berg]

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On Thu, 2006-06-15 at 00:08 +0200, Guennadi Liakhovetski wrote:

> Ghm, ok, I know what that was - the very same bug I myself reported 
> earlier in asm-offsets... 

in asm-offsets? Are you saying that you know what caused this and I
shouldn't bother looking at it?

> how do you say it in English - twice in the same 
> trap?:-)

No idea :)

johannes

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Re: [OOPS] 2.6.17-rc3 on an mpc8241

[Guennadi Liakhovetski]

On Thu, 15 Jun 2006, Johannes Berg wrote:

> On Thu, 2006-06-15 at 00:08 +0200, Guennadi Liakhovetski wrote:
> 
> > Ghm, ok, I know what that was - the very same bug I myself reported 
> > earlier in asm-offsets... 
> 
> in asm-offsets? Are you saying that you know what caused this and I
> shouldn't bother looking at it?

As I said - already reported and fixed in 2.6.17-rc6:

From: Linus Torvalds <>
To: Linux Kernel Mailing List <>
Subject: Linux v2.6.17-rc6

...
Paul Mackerras:
      Add CMSPAR to termbits.h for powerpc and alpha
      ppc: Fix typo in TI_LOCAL_FLAGS definition

Thanks
Guennadi
---
Guennadi Liakhovetski

Re: [OOPS] 2.6.17-rc3 on an mpc8241

[Johannes Berg]

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On Thu, 2006-06-15 at 00:25 +0200, Guennadi Liakhovetski wrote:

> As I said - already reported and fixed in 2.6.17-rc6:

Ah, I saw that but didn't make the connection. Sorry. Good to know it's
fine now.

johannes

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