From: Stefan Berger <stefanb@linux.ibm.com>
To: Jarkko Sakkinen <jarkko@kernel.org>
Cc: Stefan Berger <stefanb@linux.vnet.ibm.com>,
peterhuewe@gmx.de, jgg@ziepe.ca, linux-integrity@vger.kernel.org,
linux-security-module@vger.kernel.org,
linux-kernel@vger.kernel.org, Nayna Jain <nayna@linux.ibm.com>,
George Wilson <gcwilson@linux.ibm.com>,
Nageswara R Sastry <rnsastry@linux.ibm.com>
Subject: Re: [PATCH] tpm: ibmvtpm: Avoid error message when process gets signal while waiting
Date: Thu, 29 Jul 2021 09:39:18 -0400 [thread overview]
Message-ID: <2add3eac-916e-5072-f62d-23c65e23fb17@linux.ibm.com> (raw)
In-Reply-To: <20210728215033.dhnekvksekalhcrn@kernel.org>
On 7/28/21 5:50 PM, Jarkko Sakkinen wrote:
> On Mon, Jul 26, 2021 at 11:00:51PM -0400, Stefan Berger wrote:
>> On 7/26/21 10:42 PM, Jarkko Sakkinen wrote:
>>> On Mon, Jul 12, 2021 at 12:25:05PM -0400, Stefan Berger wrote:
>>>> From: Stefan Berger <stefanb@linux.ibm.com>
>>>>
>>>> When rngd is run as root then lots of these types of message will appear
>>>> in the kernel log if the TPM has been configure to provide random bytes:
>>>>
>>>> [ 7406.275163] tpm tpm0: tpm_transmit: tpm_recv: error -4
>>>>
>>>> The issue is caused by the following call that is interrupted while
>>>> waiting for the TPM's response.
>>>>
>>>> sig = wait_event_interruptible(ibmvtpm->wq,
>>>> !ibmvtpm->tpm_processing_cmd);
>>>>
>>>> The solution is to use wait_event() instead.
>>> Why?
>> So it becomes uninterruptible and these error messages go away.
> We do not want to make a process uninterruptible. That would prevent
> killing it.
I guess we'll have to go back to this one then:
https://www.spinics.net/lists/linux-integrity/msg16741.html
Stefan
>
> /Jarkko
next prev parent reply other threads:[~2021-07-29 13:40 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-12 16:25 [PATCH] tpm: ibmvtpm: Avoid error message when process gets signal while waiting Stefan Berger
2021-07-13 5:03 ` Nageswara Sastry
2021-07-27 2:42 ` Jarkko Sakkinen
2021-07-27 3:00 ` Stefan Berger
2021-07-28 21:50 ` Jarkko Sakkinen
2021-07-29 13:39 ` Stefan Berger [this message]
2021-07-30 0:57 ` Jarkko Sakkinen
2021-07-30 11:45 ` Stefan Berger
2021-07-29 16:19 Stefan Berger
2021-07-30 4:15 ` Nageswara Sastry
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=2add3eac-916e-5072-f62d-23c65e23fb17@linux.ibm.com \
--to=stefanb@linux.ibm.com \
--cc=gcwilson@linux.ibm.com \
--cc=jarkko@kernel.org \
--cc=jgg@ziepe.ca \
--cc=linux-integrity@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-security-module@vger.kernel.org \
--cc=nayna@linux.ibm.com \
--cc=peterhuewe@gmx.de \
--cc=rnsastry@linux.ibm.com \
--cc=stefanb@linux.vnet.ibm.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).