Messages in this thread | | | Date | Wed, 28 Jul 2010 14:47:31 +1000 | From | Paul Mackerras <> | Subject | Re: Please pull my perf.git urgent branch |
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On Tue, Jul 27, 2010 at 11:28:54AM -0500, Scott Wood wrote:
> Doesn't the setting of .period need to be maintained (it is in the other > powerpc perf_event implementation that this is derived from)?
Gah, yes it does.
> I don't see how this is a security fix -- the existing initializer above > should zero-fill the fields that are not explicitly initialized. In fact, > it's taking other fields that were previously initialized to zero and is > making them uninitialized, since perf_sample_data_init only sets addr and > raw.
So I misunderstood how an initializer for an automatic struct works. Brown paper bag time for me... :(
Regarding the other fields, I assume Peter et al. have checked that they don't need to be cleared, so it's a microoptimization to not clear them.
> CCing linuxppc-dev on the original patch would have been nice...
True, but at least I can blame Peter Z. for that. :)
Kumar and Ben, how do you want to proceed on this one?
Paul.
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