linux-kernel - [PATCH v2 0/5] Use EFI variables for random seed

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Message-Id: <20221118133239.2515648-1-Jason@zx2c4.com>
Date:   Fri, 18 Nov 2022 14:32:34 +0100
From:   "Jason A. Donenfeld" <Jason@...c4.com>
To:     linux-efi@...r.kernel.org, linux-crypto@...r.kernel.org,
        patches@...ts.linux.dev, linux-kernel@...r.kernel.org
Cc:     "Jason A. Donenfeld" <Jason@...c4.com>
Subject: [PATCH v2 0/5] Use EFI variables for random seed

EFI has a rather unique benefit that it has access to some limited
non-volatile storage, where the kernel can store a random seed. This
series wires that up, with EFISTUB reading the seed and passing it to
the kernel, and with the kernel writing a new seed when the RNG is
initialized.

Patches 1 and 2 are to go through Ard's EFI tree, while patches 3, 4,
and 5 are to go through my RNG tree.

Jason A. Donenfeld (5):
  efi: vars: prohibit reading random seed variables
  efi: stub: use random seed from EFI variable
  random: add back async readiness notifier
  vsprintf: initialize siphash key using notifier
  efi: random: refresh non-volatile random seed when RNG is initialized

 drivers/char/random.c                 | 20 +++++++++
 drivers/firmware/efi/efi.c            | 19 +++++++++
 drivers/firmware/efi/libstub/random.c | 59 +++++++++++++++++++++------
 fs/efivarfs/inode.c                   |  4 ++
 fs/efivarfs/super.c                   |  3 ++
 include/linux/efi.h                   |  1 +
 include/linux/random.h                |  1 +
 lib/vsprintf.c                        | 14 +++----
 8 files changed, 100 insertions(+), 21 deletions(-)

-- 
2.38.1