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PR/55990 CVS commit: src/sys/arch/m68k/m68k
The following reply was made to PR port-m68k/55990; it has been noted by GNATS.
From: "Izumi Tsutsui" <tsutsui%netbsd.org@localhost>
Subject: PR/55990 CVS commit: src/sys/arch/m68k/m68k
Date: Tue, 23 Feb 2021 16:54:17 +0000
Module Name: src
Committed By: tsutsui
Date: Tue Feb 23 16:54:17 UTC 2021
Plug kernel stack leaks in reenter_syscall() for setcontext(2).
This fixes long standing kernel crashes (MMU fault, address error,
and silent freeze by a double bus fault etc. seen for ~10 years)
caused by kernel stack overflow, especially on x68k and sun3 running
Xorg based servers. See PR/55990 for more details.
"This change seems perfectly reasonable" from thorpej@ and
jklos@ also reported this also solved freeze of his mac68k system
with 10 megabyes of memory.
Should be pulled up to netbsd-9 and netbsd-8.
To generate a diff of this commit:
cvs rdiff -u -r1.6 -r1.7 src/sys/arch/m68k/m68k/reenter_syscall.s
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
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