Re: [PATCH 0/4] netfilter fixes for 3.4-rc7

On Wed, 16 May 2012, David Miller wrote:

quoted

Could at least the patch with the subject

   netfilter: ipset: fix hash size checking in kernel

   The hash size must fit both into u32 (jhash) and the max value of
   size_t. The missing checking could lead to kernel crash, bug reported
   by Seblu.

be submitted into 3.4-rc7? Any non most-recent ipset package compiled with 
gcc-4.7 or above can trigger the bug.

And only root can trigger it if he gives bogus parameters right?

Yes, root can trigger it only, however it's a two sided bug: ipset < 6.12 
compiled with gcc >= 4.7 is broken and sends bogus data to the kernel, 
even when normal input parameters are supplied. And unpatched kernel can 
crash when acting on the bogus data. :-(
 

If that's the case, the exposure is to privileged users committing an
operator error, so I don't see it as so important.

Best regards,
Jozsef
-
E-mail  : kadlec@blackhole.kfki.hu, kadlecsik.jozsef@wigner.mta.hu
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Address : Wigner Research Centre for Physics, Hungarian Academy of Sciences
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