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From: "gregkh@linuxfoundation.org" <gregkh@linuxfoundation.org>
To: "Yeon, JeHyeon (Tom)" <Tom.Yeon@windriver.com>
Cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: LZ4 : fix the data abort issue.
Date: Fri, 13 Mar 2015 14:23:59 +0100	[thread overview]
Message-ID: <20150313132359.GA16125@kroah.com> (raw)
In-Reply-To: <D2D54504A8A67848B028EBEA66F47B9AB2A2305A@ALA-MBA.corp.ad.wrs.com>

On Thu, Mar 12, 2015 at 08:28:55AM +0000, Yeon, JeHyeon (Tom) wrote:
> If the part of the compression data are corrupted, or the compression
> data is totally fake, the memory access over the limit is possible.
> 
> This is the log from my system usning lz4 decompression.
>    [6502]data abort, halting
>    [6503]r0  0x00000000 r1  0x00000000 r2  0xdcea0ffc r3  0xdcea0ffc
>    [6509]r4  0xb9ab0bfd r5  0xdcea0ffc r6  0xdcea0ff8 r7  0xdce80000
>    [6515]r8  0x00000000 r9  0x00000000 r10 0x00000000 r11 0xb9a98000
>    [6522]r12 0xdcea1000 usp 0x00000000 ulr 0x00000000 pc  0x820149bc
>    [6528]spsr 0x400001f3
> and the memory addresses of some variables at the moment are
>     ref:0xdcea0ffc, op:0xdcea0ffc, oend:0xdcea1000
> 
> As you can see, COPYLENGH is 8bytes, so @ref and @op can access the momory
> over @oend.
> 
> Signed-off-by: tom.yeon <tom.yeon@windriver.com>

I need a "real" name here, I somehow doubt that your government
documents has your name as "tom.yeon", right?

Please fix this up and resend so that I can apply it.

thanks,

greg k-h

  parent reply	other threads:[~2015-03-13 13:24 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <D2D54504A8A67848B028EBEA66F47B9AB2A22E9E@ALA-MBA.corp.ad.wrs.com>
     [not found] ` <20150312074918.GC31132@kroah.com>
2015-03-12  8:28   ` LZ4 : fix the data abort issue Yeon, JeHyeon (Tom)
2015-03-13 11:22     ` David Sterba
2015-03-13 13:23     ` gregkh [this message]
2015-03-16  1:03       ` 회신: " Yeon, JeHyeon (Tom)

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