linux-kernel - Re: [PATCH] MIPS: init: Prevent adding memory before PHYS

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-prev] [day] [month] [year] [list]

Date:   Wed, 2 Oct 2019 22:54:03 +0000
From:   Paul Burton <paul.burton@...s.com>
To:     Thomas Bogendoerfer <tbogendoerfer@...e.de>
CC:     Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <pburton@...ecomp.com>,
        James Hogan <jhogan@...nel.org>,
        "linux-mips@...r.kernel.org" <linux-mips@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-mips@...r.kernel.org" <linux-mips@...r.kernel.org>
Subject: Re: [PATCH] MIPS: init: Prevent adding memory before PHYS_OFFSET

Hello,

Thomas Bogendoerfer wrote:
> On some SGI machines (IP28 and IP30) a small region of memory is mirrored
> to pyhsical address 0 for exception vectors while rest of the memory
> is reachable at a higher physical address. ARC PROM marks this
> region as reserved, but with commit a94e4f24ec83 ("MIPS: init: Drop
> boot_mem_map") this chunk is used, when searching for start of ram,
> which breaks at least IP28 and IP30 machines. To fix this
> add_region_memory() checks for start address < PHYS_OFFSET and ignores
> these chunks.

Applied to mips-fixes.

> commit bd848d1b9235
> https://git.kernel.org/mips/c/bd848d1b9235
> 
> Fixes: a94e4f24ec83 ("MIPS: init: Drop boot_mem_map")
> Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@...e.de>
> Signed-off-by: Paul Burton <paul.burton@...s.com>

Thanks,
    Paul

[ This message was auto-generated; if you believe anything is incorrect
  then please email paul.burton@...s.com to report it. ]