CVS commit: src/sys/kern

["Maxime Villard" <maxv%netbsd.org@localhost>]

Module Name:    src
Committed By:   maxv
Date:           Mon Aug 20 11:35:28 UTC 2018

Modified Files:
        src/sys/kern: files.kern subr_kmem.c

Log Message:
Retire KMEM_REDZONE and KMEM_POISON.

KMEM_REDZONE is not very efficient and cannot detect read overflows. KASAN
can, and will be used instead.

KMEM_POISON is enabled along with KMEM_GUARD, but it is redundant, since
the latter can detect read UAFs contrary to the former. In fact maybe
KMEM_GUARD should be retired too, because there are many cases where it
doesn't apply.

Simplifies the code.


To generate a diff of this commit:
cvs rdiff -u -r1.21 -r1.22 src/sys/kern/files.kern
cvs rdiff -u -r1.66 -r1.67 src/sys/kern/subr_kmem.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.