From: "Jason A. Donenfeld" <Jason@zx2c4.com>
To: Luigi Semenzato <semenzato@chromium.org>
Cc: Thorsten Leemhuis <regressions@leemhuis.info>,
James Bottomley <James.Bottomley@hansenpartnership.com>,
Peter Huewe <peterhuewe@gmx.de>,
Jarkko Sakkinen <jarkko@kernel.org>,
Jason Gunthorpe <jgg@ziepe.ca>, Jan Dabros <jsd@semihalf.com>,
regressions@lists.linux.dev, LKML <linux-kernel@vger.kernel.org>,
linux-integrity@vger.kernel.org,
Dominik Brodowski <linux@dominikbrodowski.net>,
Herbert Xu <herbert@gondor.apana.org.au>,
Johannes Altmanninger <aclopte@gmail.com>,
stable@vger.kernel.org,
Linus Torvalds <torvalds@linux-foundation.org>,
Vlastimil Babka <vbabka@suse.cz>,
tbroch@chromium.org, dbasehore@chromium.org,
keescook@chromium.org
Subject: Re: [PATCH v2] tpm: Allow system suspend to continue when TPM suspend fails
Date: Fri, 6 Jan 2023 18:16:19 +0100 [thread overview]
Message-ID: <CAHmME9pwUZ+rOLEB=zLTUObAv0At=_n5vs=xQfB=Kw_hwA03Tg@mail.gmail.com> (raw)
In-Reply-To: <CAA25o9RGVbiXS6ne53gdM1K706zT=hm5c-KuMWrCA_CJtJDXdw@mail.gmail.com>
On Fri, Jan 6, 2023 at 6:04 PM Luigi Semenzato <semenzato@chromium.org> wrote:
>
> I worked a fair amount on TPM 1.0 about 10 years ago and I even vaguely remember suspend-related problems. I'd be happy to take a look. The linked thread shows that Peter Huewe was copied. I know Peter well, his opinion can be trusted. Unfortunately I don't immediately see a link to a patch, can you help?
Sorry, I should have included that:
https://lore.kernel.org/lkml/20230106030156.3258307-1-Jason@zx2c4.com/
Instead of blocking system suspend when TPM_ORD_SAVESTATE fails, it
just lets the system sleep anyway. This means that presumably the
system might sleep without having called TPM_ORD_SAVESTATE. Trying to
figure out how bad that is.
And yes, Peter Huewe certainly knows about TPMs, especially as he
maintains the code in Linux, but the maintainers haven't been so much
available, unfortunately. This bug happens to intersect with something
mostly related that I work on (the rng), so I'm motivated to at least
prevent the worst of the breakage, but I otherwise don't know anything
about the Linux TPM driver.
Jason
next prev parent reply other threads:[~2023-01-06 17:16 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-28 20:22 [REGRESSION] suspend to ram fails in 6.2-rc1 due to tpm errors Vlastimil Babka
2022-12-28 23:07 ` James Bottomley
2022-12-29 4:03 ` Jason A. Donenfeld
2022-12-29 4:16 ` Jason A. Donenfeld
2023-01-05 13:59 ` Thorsten Leemhuis
2023-01-05 14:25 ` Vlastimil Babka
2023-01-05 14:47 ` [PATCH] tpm: Disable hwrng for TPM 1 if PM_SLEEP is enabled Jason A. Donenfeld
2023-01-05 14:53 ` Jason A. Donenfeld
2023-01-05 21:58 ` Linus Torvalds
2023-01-05 22:29 ` Jason A. Donenfeld
2023-01-06 3:01 ` [PATCH v2] tpm: Allow system suspend to continue when TPM suspend fails Jason A. Donenfeld
2023-01-06 16:01 ` Jason A. Donenfeld
[not found] ` <CAA25o9RGVbiXS6ne53gdM1K706zT=hm5c-KuMWrCA_CJtJDXdw@mail.gmail.com>
2023-01-06 17:16 ` Jason A. Donenfeld [this message]
2023-01-06 18:59 ` Linus Torvalds
2023-01-06 20:04 ` Luigi Semenzato
2023-01-06 22:28 ` Linus Torvalds
2023-01-09 16:05 ` Jason A. Donenfeld
2023-01-16 8:12 ` Jarkko Sakkinen
2023-01-16 14:03 ` Jason A. Donenfeld
2023-01-21 0:07 ` Jarkko Sakkinen
2023-01-16 11:44 ` Jarkko Sakkinen
2023-01-16 14:00 ` Vlastimil Babka
2023-01-21 0:03 ` Jarkko Sakkinen
2023-01-05 15:17 ` [REGRESSION] suspend to ram fails in 6.2-rc1 due to tpm errors James Bottomley
2023-01-05 15:27 ` Jason A. Donenfeld
2023-01-05 15:32 ` Jason A. Donenfeld
2023-01-09 16:08 ` Jason A. Donenfeld
2023-01-10 17:19 ` Vlastimil Babka
2023-01-20 23:47 ` Jarkko Sakkinen
2023-03-14 9:35 ` Thorsten Leemhuis
2023-03-14 12:19 ` Jarkko Sakkinen
2023-03-14 12:47 ` Jason A. Donenfeld
2023-03-14 13:05 ` Jarkko Sakkinen
2023-03-14 13:08 ` Jarkko Sakkinen
2023-03-14 13:53 ` Jason A. Donenfeld
2023-03-14 14:23 ` Jarkko Sakkinen
2023-04-21 15:03 ` Jarkko Sakkinen
2023-04-21 18:27 ` Jason A. Donenfeld
2023-04-23 15:34 ` Jarkko Sakkinen
2023-04-25 23:34 ` Jarkko Sakkinen
2023-04-26 1:32 ` Jason A. Donenfeld
2023-04-26 16:07 ` Jarkko Sakkinen
2023-04-26 17:00 ` Jarkko Sakkinen
2023-01-04 9:10 ` Johannes Altmanninger
2023-01-16 11:30 ` Jarkko Sakkinen
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