linux-kernel - Re: [git pull] OProfile fixes for v2.6.28

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Message-ID: <4917EB51.9020304@cosmosbay.com>
Date:	Mon, 10 Nov 2008 09:05:37 +0100
From:	Eric Dumazet <dada1@...mosbay.com>
To:	Robert Richter <robert.richter@....com>
CC:	Ingo Molnar <mingo@...e.hu>, LKML <linux-kernel@...r.kernel.org>,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [git pull] OProfile fixes for v2.6.28

Robert Richter a écrit :
> Hi Ingo,
> 
> please pull oprofile fixes for 2.6.28 for tip regression:
> 
> git://git.kernel.org/pub/scm/linux/kernel/git/rric/oprofile.git oprofile-for-tip
> 
> Thanks,
> 
> -Robert
> 
> Andi Kleen (1):
>       oprofile: Fix p6 counter overflow check
> 
> Carl Love (2):
>       Cell OProfile: Incorrect local array size in activate spu profiling function
>       Cell OProfile: Incorrect local array size in activate spu profiling function
> 
> Jesper Dangaard Brouer (1):
>       Change UTF8 chars in Kconfig help text about Oprofile AMD barcelona
> 
> Nick Piggin (1):
>       oprofile: fix memory ordering
> 
> Robert Richter (1):
>       Revert "Cell OProfile: Incorrect local array size in activate spu profiling function"
> 

Hi Robert

I am still trying to find why oprofile stops after some millions of samples on my machine.

(All versions of linux supporting oprofile/NMI on this machine have this problem)
Note : I am using a 32bit kernel.

While doing code review I found this bug.

Impact: 32bit kernels, memory corruption

[PATCH] oprofile: fix an overflow in ppro code

reset_value was changed from long to u64 in commit b99170288421c79f0c2efa8b33e26e65f4bb7fb8
(oprofile: Implement Intel architectural perfmon support)

But dynamic allocation of this array use a wrong type (long instead of u64)

Signed-off-by: Eric Dumazet <dada1@...mosbay.com>
---
 arch/x86/oprofile/op_model_ppro.c |    2 +-
 1 files changed, 1 insertion(+), 1 deletion(-)


View attachment "oprofile_ppro.patch" of type "text/plain" (482 bytes)