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PR/56381 CVS commit: src/sys/arch/sh3/sh3
The following reply was made to PR port-sh3/56381; it has been noted by GNATS.
From: "Rin Okuyama" <rin%netbsd.org@localhost>
Subject: PR/56381 CVS commit: src/sys/arch/sh3/sh3
Date: Thu, 2 Sep 2021 07:55:56 +0000
Module Name: src
Committed By: rin
Date: Thu Sep 2 07:55:56 UTC 2021
pmap_enter() returns ENOMEM if __pmap_pte_alloc() fails and PMAP_CANFAIL
flag is specified. In this case, remove pv via __pmap_pv_remove() if it is
added to p-v map list via __pmap_pv_enter().
Otherwise, pmap becomes an inconsistent state, which results in an infinite
loop in pmap_page_protect(), as reported in the PR.
Also, KASSERT's are added for sure, in order to detect the infinite loops.
Great thanks to chs@ for finding out this bug!!
To generate a diff of this commit:
cvs rdiff -u -r1.85 -r1.86 src/sys/arch/sh3/sh3/pmap.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
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