Messages in this thread | | | Date | Fri, 27 Nov 2015 10:30:03 +0100 (CET) | From | Thomas Gleixner <> | Subject | Re: [PATCH 15/37] x86, pkeys: pass VMA down in to fault signal generation code |
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On Mon, 16 Nov 2015, Dave Hansen wrote: > During a page fault, we look up the VMA to ensure that the fault > is in a region with a valid mapping. But, in the top-level page > fault code we don't need the VMA for much else. Once we have > decided that an access is bad, we are going to send a signal no > matter what and do not need the VMA any more. So we do not pass > it down in to the signal generation code. > > But, for protection keys, we need the VMA. It tells us *which* > protection key we violated if we get a PF_PK. So, we need to > pass the VMA down and fill in siginfo->si_pkey. > > Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
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