From: Bart Van Assche <Bart.VanAssche@wdc.com>
To: "wakko@animx.eu.org" <wakko@animx.eu.org>
Cc: "linux-scsi@vger.kernel.org" <linux-scsi@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"richard.weinberger@gmail.com" <richard.weinberger@gmail.com>,
"linux-block@vger.kernel.org" <linux-block@vger.kernel.org>
Subject: Re: 4.15.14 crash with iscsi target and dvd
Date: Fri, 6 Apr 2018 02:20:09 +0000 [thread overview]
Message-ID: <fb0640c203409a84ab1bfbbc41078a5416138ad2.camel@wdc.com> (raw)
In-Reply-To: <20180406020651.GB16112@animx.eu.org>
On Thu, 2018-04-05 at 22:06 -0400, Wakko Warner wrote:
> I know now why scsi_print_command isn't doing anything. cmd->cmnd is null.
> I added a dev_printk in scsi_print_command where the 2 if statements return.
> Logs:
> [ 29.866415] sr 3:0:0:0: cmd->cmnd is NULL
That's something that should never happen. As one can see in
scsi_setup_scsi_cmnd() and scsi_setup_fs_cmnd() both functions initialize
that pointer. Since I have not yet been able to reproduce myself what you
reported, would it be possible for you to bisect this issue? You will need
to follow something like the following procedure (see also
https://git-scm.com/docs/git-bisect):
git clone git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git bisect start
git bisect bad v4.10
git bisect good v4.9
and then build the kernel, install it, boot the kernel and test it.
Depending on the result, run either git bisect bad or git bisect good and
keep going until git bisect comes to a conclusion. This can take an hour or
more.
Bart.
next prev parent reply other threads:[~2018-04-06 2:20 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-31 1:59 4.15.14 crash with iscsi target and dvd Wakko Warner
2018-03-31 20:59 ` Wakko Warner
2018-03-31 21:08 ` Richard Weinberger
2018-03-31 22:12 ` Wakko Warner
2018-04-01 3:40 ` Bart Van Assche
2018-04-01 11:37 ` Wakko Warner
2018-04-01 15:02 ` Bart Van Assche
2018-04-01 16:24 ` Wakko Warner
2018-04-01 16:51 ` Bart Van Assche
2018-04-01 16:36 ` Wakko Warner
2018-04-01 18:27 ` Wakko Warner
2018-04-03 17:03 ` Bart Van Assche
2018-04-05 0:26 ` Wakko Warner
2018-04-06 1:46 ` Wakko Warner
2018-04-06 2:06 ` Wakko Warner
2018-04-06 2:20 ` Bart Van Assche [this message]
2018-04-06 23:42 ` Wakko Warner
2018-04-07 1:03 ` Wakko Warner
2018-04-07 2:06 ` Bart Van Assche
2018-04-07 16:53 ` Wakko Warner
2018-04-07 17:08 ` Wakko Warner
2018-04-07 17:09 ` Bart Van Assche
2018-04-08 16:02 ` Wakko Warner
2018-04-08 16:15 ` Wakko Warner
2018-04-09 21:30 ` Bart Van Assche
2018-04-09 23:34 ` Ming Lei
2018-04-09 23:43 ` Wakko Warner
2018-04-09 23:51 ` Ming Lei
2018-04-11 0:45 ` Wakko Warner
2018-04-12 0:52 ` Wakko Warner
2018-04-12 10:07 ` Ming Lei
2018-04-13 1:43 ` Wakko Warner
2018-04-13 1:55 ` Ming Lei
2018-04-14 21:34 ` Wakko Warner
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