linux-kernel - Re: [PATCH 4/5] block: move queue enter logic into blk_mq_submit

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 for Android: free password hash cracker in your pocket

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

Message-ID: <CAMuHMdXe4bA-a968cUcdaCKesMtkMc+qs=4L8nF2QQ0rWvAVHw@mail.gmail.com>
Date:   Fri, 12 Nov 2021 08:37:31 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Michael Schmitz <schmitzmic@...il.com>
Cc:     "Martin K. Petersen" <martin.petersen@...cle.com>,
        Jens Axboe <axboe@...nel.dk>,
        Christoph Hellwig <hch@...radead.org>,
        linux-block@...r.kernel.org,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 4/5] block: move queue enter logic into blk_mq_submit_bio()

Hi Michael,

On Thu, Nov 11, 2021 at 10:35 PM Michael Schmitz <schmitzmic@...il.com> wrote:
> how easy is that to reproduce?

Fairly easy: it happens either on mounting, or after a few seconds booting
into my old Debian userspace.

> sd_setup_read_write_cmnd() does not validate the request's FUA flag
> against sdkp->DPOFUA (not suggesting that it should ...). I'd like to
> try and trace when such a mismatch happens.

Thanks!

> On 12/11/21 03:48, Geert Uytterhoeven wrote:
> > On Thu, Nov 11, 2021 at 2:19 PM Martin K. Petersen
> > <martin.petersen@...cle.com> wrote:
> >>> sd 0:0:0:0: [sda] tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_OK cmd_age=0s
> >>> sd 0:0:0:0: [sda] tag#0 Sense Key : Illegal Request [current]
> >>> sd 0:0:0:0: [sda] tag#0 Add. Sense: Invalid field in cdb
> >>> sd 0:0:0:0: [sda] tag#0 CDB: Write(10) 2a 08 00 00 00 01 00 00 08 00
> >>> critical target error, dev sda, sector 1 op 0x1:(WRITE) flags 0x20800 phys_seg 1 prio class 0
> >>> Buffer I/O error on dev sda1, logical block 0, lost sync page write
> >>
> >> Peculiar. That write command looks OK to me. I wonder if it's the FUA
> >> bit that trips it?
> >>
> >> What does:
> >>
> >> # dmesg | grep FUA
> >>
> >> say?
> >
> > sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't
> > support DPO or FUA

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds