linux-kernel - CONFIG_DEBUG_VIRTUAL breaks boot on x86-32

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Message-ID: <4d5ee3b0-6d47-a8df-a6b3-54b0fba66ed7@linux.ee>
Date:   Thu, 21 Mar 2019 22:22:43 +0200
From:   Meelis Roos <mroos@...ux.ee>
To:     LKML <linux-kernel@...r.kernel.org>, linux-mm@...ck.org
Subject: CONFIG_DEBUG_VIRTUAL breaks boot on x86-32

I tried to debug another problem and turned on most debug options for memory.
The resulting kernel failed to boot.

Bisecting the configurations led to CONFIG_DEBUG_VIRTUAL - if I turned it on
in addition to some other debug options, the machine crashed with

kernel BUG at arch/x86/mm/physaddr.c:79!

Screenshot at http://kodu.ut.ee/~mroos/debug_virtual-boot-hang-1.jpg

The machine was Athlon XP with VIA KT600 chipset and 2G RAM.

-- 
Meelis Roos <mroos@...ux.ee>