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PR/52964 CVS commit: src/sys/arch
The following reply was made to PR port-amd64/52964; it has been noted by GNATS.
From: "Ryota Ozaki" <ozaki-r%netbsd.org@localhost>
Subject: PR/52964 CVS commit: src/sys/arch
Date: Tue, 13 Feb 2018 04:10:41 +0000
Module Name: src
Committed By: ozaki-r
Date: Tue Feb 13 04:10:41 UTC 2018
Fix NULL pointer dereference via ddb_regs
ddb_regs can be *ddb_regp (see db_machdep.h) so ddb_regp should be NULL-ed
after dereference to ddb_regs.
Also dbreg should be restored to ddb_regp because ddb_regp can be changed
by db_mach_cpu during db_trap.
Fix PR 52964
Helped by nonaka@
To generate a diff of this commit:
cvs rdiff -u -r1.29 -r1.30 src/sys/arch/amd64/amd64/db_interface.c
cvs rdiff -u -r1.78 -r1.79 src/sys/arch/i386/i386/db_interface.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
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