linux-kernel - Re: [PATCH -next] arm64/mm: fix a bogus GFP flag in pgd

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

Message-Id: <20190612065728.GB4761@rapoport-lnx>
Date:   Wed, 12 Jun 2019 09:57:36 +0300
From:   Mike Rapoport <rppt@...ux.ibm.com>
To:     Qian Cai <cai@....pw>
Cc:     Mark Rutland <mark.rutland@....com>,
        Will Deacon <will.deacon@....com>,
        Andrew Morton <akpm@...ux-foundation.org>,
        catalin.marinas@....com,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        mhocko@...nel.org, linux-mm@...ck.org, vdavydov.dev@...il.com,
        hannes@...xchg.org, cgroups@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH -next] arm64/mm: fix a bogus GFP flag in pgd_alloc()

Hi,

On Tue, Jun 11, 2019 at 08:46:45AM -0400, Qian Cai wrote:
> 
> > On Jun 11, 2019, at 8:41 AM, Mike Rapoport <rppt@...ux.ibm.com> wrote:
> > 
> > Sorry for the delay, I'm mostly offline these days.
> > 
> > I wanted to understand first what is the reason for the failure. I've tried
> > to reproduce it with qemu, but I failed to find a bootable configuration
> > that will have PGD_SIZE != PAGE_SIZE :(
> > 
> > Qian Cai, can you share what is your environment and the kernel config?
> 
> https://raw.githubusercontent.com/cailca/linux-mm/master/arm64.config
> 
> # lscpu
> Architecture:        aarch64
> Byte Order:          Little Endian
> CPU(s):              256
> On-line CPU(s) list: 0-255
> Thread(s) per core:  4
> Core(s) per socket:  32
> Socket(s):           2
> NUMA node(s):        2
> Vendor ID:           Cavium
> Model:               1
> Model name:          ThunderX2 99xx
> Stepping:            0x1
> BogoMIPS:            400.00
> L1d cache:           32K
> L1i cache:           32K
> L2 cache:            256K
> L3 cache:            32768K
> NUMA node0 CPU(s):   0-127
> NUMA node1 CPU(s):   128-255
> Flags:               fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics cpuid asimdrdm
> 
> # dmidecode
> Handle 0x0001, DMI type 1, 27 bytes
> System Information
>         Manufacturer: HPE
>         Product Name: Apollo 70             
>         Version: X1
>         Wake-up Type: Power Switch
>         Family: CN99XX
> 

Can you please also send the entire log when the failure happens?

Another question, is the problem exist with PGD_SIZE == PAGE_SIZE?
 

-- 
Sincerely yours,
Mike.