linux-kernel - Re: linux acpi (thunderbolt? bug)

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: <CAHp75VdwOAMnzSnhRCjNALn=n7BDiePoGBCsNojcz4QMzT3+UA@mail.gmail.com>
Date:   Wed, 14 Feb 2018 15:55:54 +0200
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Thomas Gleixner <tglx@...utronix.de>,
        Mika Westerberg <mika.westerberg@...ux.intel.com>
Cc:     Yuriy Vostrikov <delamonpansie@...il.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        x86@...nel.org
Subject: Re: linux acpi (thunderbolt? bug)

+Cc: Mika -- the Thunderbolt guy.

On Wed, Feb 14, 2018 at 2:09 PM, Thomas Gleixner <tglx@...utronix.de> wrote:
> On Wed, 14 Feb 2018, Yuriy Vostrikov wrote:
>> after boot
>> name:   VECTOR
>>  size:   0
>>  mapped: 64
>>  flags:  0x00000041
>> Online bitmaps:        2
>> Global available:    368
>> Global reserved:      26
>> Total allocated:      38
>> System: 41: 0-19,32,50,128,238-255
>>  | CPU | avl | man | act | vectors
>>      0   184     1    19  33-49,51-52
>>      1   184     1    19  33-49,51-52
>>
>> after unplug
>> name:   VECTOR
>>  size:   0
>>  mapped: 55
>>  flags:  0x00000041
>> Online bitmaps:        2
>> Global available:    377
>> Global reserved:      26
>> Total allocated:      29
>> System: 41: 0-19,32,50,128,238-255
>>  | CPU | avl | man | act | vectors
>>      0   188     1    15  33-46,48
>>      1   189     1    14  33-46
>>
>> after sleep 1 time
>> name:   VECTOR
>>  size:   0
>>  mapped: 35
>>  flags:  0x00000041
>> Online bitmaps:        2
>> Global available:    385
>> Global reserved:      12
>> Total allocated:      32
>> System: 41: 0-19,32,50,128,238-255
>>  | CPU | avl | man | act | vectors
>>      0   185     1    18  33-43,46-49,51-53
>>      1   200     1     3  33-37
>
> The accounting is already screwed. CPU1 claims to have 3 allocated vectors,
> but the allocation bitmap has 5 bits set !?!
>
> I have no idea yet how that can happen. Lemme stare into the code some more
> and I came back to you.
>
> Thanks,
>
>         tglx



-- 
With Best Regards,
Andy Shevchenko