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RE: same kernel working with 1 userspace filesystem and not with another one (Android IceCreamSandwich and JellyBean)


Thanks Frank (and Josh), issue was kptr_restrict set to 2 for increased Android JellyBean security.

Regards
Fred

OMAP Platform Business Unit - System Platform Engineering - Platform & Product Entitlement

>
Texas Instruments France SA, 821 Avenue Jack Kilby, 06270 Villeneuve Loubet. 036 420 040 R.C.S Antibes. Capital de EUR 12.654.784

-----Original Message-----
>From: systemtap-owner@sourceware.org [mailto:systemtap-owner@sourceware.org] On Behalf Of Turgis,
>Frederic
>Sent: Saturday, October 06, 2012 1:51 PM
>To: Frank Ch. Eigler
>Cc: systemtap@sourceware.org
>Subject: RE: same kernel working with 1 userspace filesystem and not with another one (Android
>IceCreamSandwich and JellyBean)
>
>Well, I remember it was mentioned on IRC or mailing list. I will try on board when back but that makes
>sense when "googling"
>
>"Jelly Bean also pulled in a couple easy enhancements inherited from the upstream Linux kernel that
>can prevent information leakage. The dmesg_restrict and kptr_restrict sysctls, originally implemented
>by Dan Rosenberg, are now available and enabled in 4.1."
>
>Thanks
>
>Regards
>Fred
>
>OMAP Platform Business Unit - System Platform Engineering - Platform & Product Entitlement
>
>>
>Texas Instruments France SA, 821 Avenue Jack Kilby, 06270 Villeneuve Loubet. 036 420 040 R.C.S
>Antibes. Capital de EUR 12.654.784
>
>-----Original Message-----
>>From: Frank Ch. Eigler [mailto:fche@redhat.com]
>>Sent: Saturday, October 06, 2012 4:21 AM
>>To: Turgis, Frederic
>>Cc: systemtap@sourceware.org
>>Subject: Re: same kernel working with 1 userspace filesystem and not with another one (Android
>>IceCreamSandwich and JellyBean)
>>
>>
>>Hi, Frederic -
>>
>>f-turgis wrote:
>>
>>> [...]
>>>    * probing functions does not work, it seems that nothing happens in that case (we just do a
>>print, we only get tracepoints prints)
>>>    * at test start, we get now "WARNING: build-id address 0 < base 0"
>>> [...]
>>
>>This sounds like http://sourceware.org/bugzilla/show_bug.cgi?id=14555
>>
>>- FChE



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