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Differential D21754

Set NX in mappings created by pmap_kenter() and pmap_kenter_attr().
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Authored by markj on Sep 22 2019, 7:38 PM.
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alc
kib
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rS352622: Set NX in mappings created by pmap_kenter() and pmap_kenter_attr().
Summary

As far as I know there is no reason for such mappings to be executable.
Other functions for creating kernel mappings, such as pmap_qenter(),
also set NX.

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rS FreeBSD src repository - subversion
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Event Timeline

markj created this revision.Sep 22 2019, 7:38 PM
Harbormaster completed remote builds in B26624: Diff 62432.Sep 22 2019, 7:38 PM
markj added reviewers: alc, kib.Sep 22 2019, 7:53 PM
kib accepted this revision.Sep 22 2019, 8:16 PM

I think the only interesting case is pmap_mapbios(), but it should be fine. Anyway, we will see.

This revision is now accepted and ready to land.Sep 22 2019, 8:16 PM
alc accepted this revision.Sep 22 2019, 8:33 PM
Closed by commit rS352622: Set NX in mappings created by pmap_kenter() and pmap_kenter_attr(). (authored by markj). · Explain WhySep 23 2019, 2:12 PM
This revision was automatically updated to reflect the committed changes.
markj added a commit: rS352622: Set NX in mappings created by pmap_kenter() and pmap_kenter_attr()..
Herald added a subscriber: imp. · View Herald TranscriptSep 23 2019, 2:12 PM

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head/
sys/
amd64/
amd64/
4 lines

Diff 62465

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head/sys/amd64/amd64/pmap.c

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