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vm_map_protect may return an INVALID_ARGUMENT or PROTECTION_FAILURE

Description

vm_map_protect may return an INVALID_ARGUMENT or PROTECTION_FAILURE
error response after clipping the first map entry in the region to be
reserved. This creates a pair of matching entries that should have
been "simplified" back into one, or never created. This change defers
the clipping of that entry until those two vm_map_protect failure
cases have been ruled out.

Reviewed by: alc
Approved by: markj (mentor)
Differential Revision: https://reviews.freebsd.org/D20711

Details

Committed
dougmJun 25 2019, 7:44 AM
Reviewer
alc
Differential Revision
D20711: Stop early clipping in vm_map_protect
Parents
rS349362: The definition of icmptypes in ip_compt.h is dead code as it already
Branches
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Tags
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