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Differential D29442

vm_fault: handle KERN_PROTECTION_FAILURE
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Authored by kib on Mar 27 2021, 11:13 AM.
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alc
markj
jah
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rGc7b913aa47ba: vm_fault: handle KERN_PROTECTION_FAILURE
Summary

pmap_enter(PMAP_ENTER_LARGEPAGE) may return KERN_PROTECTION_FAILURE due to PKRU inconsistency. Handle it in the call place from vm_fault_populate(), and in places which decode errors from vm_fault_populate()/vm_fault_allocate().

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rG FreeBSD src repository
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Event Timeline

kib requested review of this revision.Mar 27 2021, 11:13 AM
kib created this revision.
kib mentioned this in D29439: Clean up a couple of MD warts in vm_fault_populate():.
jah accepted this revision.Mar 27 2021, 2:00 PM
This revision is now accepted and ready to land.Mar 27 2021, 2:00 PM
markj accepted this revision.Mar 27 2021, 2:57 PM
markj added inline comments.
sys/vm/vm_fault.c
563

If psind == 0, we do not assert rv == KERN_SUCCESS, but it looks like we should.

markj added inline comments.Mar 27 2021, 2:58 PM
sys/vm/vm_fault.c
563

Never mind, @jah fixed it in D29439.

Closed by commit rGc7b913aa47ba: vm_fault: handle KERN_PROTECTION_FAILURE (authored by kib). · Explain WhyMar 27 2021, 6:48 PM
This revision was automatically updated to reflect the committed changes.
kib added a commit: rGc7b913aa47ba: vm_fault: handle KERN_PROTECTION_FAILURE.

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sys/
vm/
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sys/vm/vm_fault.c

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