From: Jerry Snitselaar <jsnitsel@redhat.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Jarkko Sakkinen <jarkko.sakkinen@linux.intel.com>,
tomas.winkler@intel.com, Jason Gunthorpe <jgg@ziepe.ca>,
James Bottomley <James.Bottomley@hansenpartnership.com>,
linux-integrity@vger.kernel.org,
linux-security-module@vger.kernel.org,
Linux List Kernel Mailing <linux-kernel@vger.kernel.org>
Subject: Re: Getting weird TPM error after rebasing my tree to security/next-general
Date: Thu, 31 Jan 2019 16:31:36 -0700 [thread overview]
Message-ID: <20190131233136.3dhadb7a46lp2nu6@cantor> (raw)
In-Reply-To: <CAHk-=wgPCL9WgkwvK5ehJxg7Df1DHQqGZ0KtBxtjN93QjzUyog@mail.gmail.com>
On Thu Jan 31 19, Linus Torvalds wrote:
>On Thu, Jan 31, 2019 at 12:47 PM Jarkko Sakkinen
><jarkko.sakkinen@linux.intel.com> wrote:
>>
>> I'll try it first thing when I wake up tomorrow (11PM in Finland ATM).
>
>Thanks.
>
>> Appreciate for taking time on this.
>
>Hey, it was my commit that broke it for you. Even if it happened to
>work before, and only did so by pure luck, it was a functional
>regression.
>
>I get very upset when other developers don't step up when *their*
>changes break something, and I don't consider "it shouldn't have
>worked in the first place" to be a valid excuse. You broke it, you'd
>better fix it.
>
>So I had better fix my own mess too, in order to not look too hypocritical.
>
>And I was very aware that hardcoding the memcpy_*io() access patterns
>might break something. I just _hoped_ it wouldn't, because we actually
>ended up going back to the very original access patterns (but it was
>from a long long time ago).
>
>In fact, while it's slightly annoying, in many ways it's actually good
>that we found breakage, and could pinpoint exactly *why* it broke.
>That does validate the whole "we shouldn't just depend on the random
>implementation detail of 'memcpy()'" argument.
>
>So I'll wait to hear back whether that patch fixes things for you, but
>I _think_ it will, and we'll be better off in the long range with this
>whole thing.
>
> Linus
I just did a quick test here of booting and running a couple commands
(tpm2_getcap, tpm2_pcrlist), and the patch seems to work for me. I was
seeing the error during tpm_crb initialization without the patch.
next prev parent reply other threads:[~2019-01-31 23:31 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-18 14:25 Getting weird TPM error after rebasing my tree to security/next-general Jarkko Sakkinen
2019-01-18 22:09 ` James Bottomley
2019-01-20 16:04 ` Jarkko Sakkinen
2019-01-22 1:02 ` Jarkko Sakkinen
2019-01-22 2:58 ` Jason Gunthorpe
2019-01-22 13:29 ` Jarkko Sakkinen
2019-01-22 18:26 ` Linus Torvalds
2019-01-23 15:36 ` Jarkko Sakkinen
2019-01-23 18:43 ` Linus Torvalds
2019-01-29 13:20 ` Jarkko Sakkinen
2019-01-31 12:26 ` Jarkko Sakkinen
2019-01-31 16:04 ` Jarkko Sakkinen
2019-01-31 17:06 ` Jarkko Sakkinen
2019-01-31 17:43 ` Linus Torvalds
2019-01-31 18:47 ` Jarkko Sakkinen
2019-01-31 18:35 ` Jarkko Sakkinen
2019-01-31 18:51 ` Linus Torvalds
2019-01-31 18:52 ` Linus Torvalds
2019-01-31 19:10 ` Linus Torvalds
2019-01-31 19:47 ` Winkler, Tomas
2019-02-01 8:12 ` Jarkko Sakkinen
2019-01-31 20:07 ` Winkler, Tomas
2019-01-31 20:47 ` Jarkko Sakkinen
2019-01-31 21:58 ` Linus Torvalds
2019-01-31 23:31 ` Jerry Snitselaar [this message]
2019-02-01 11:40 ` Jarkko Sakkinen
2019-01-31 20:45 ` Jarkko Sakkinen
2019-02-01 18:04 ` Linus Torvalds
2019-02-04 11:58 ` Jarkko Sakkinen
2019-01-23 20:11 ` Jarkko Sakkinen
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