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Nicolai Stange b2bef5500e crypto: drbg - prepare for more fine-grained tracking of seeding state commit `ce8ce31b2c` upstream. There are two different randomness sources the DRBGs are getting seeded from, namely the jitterentropy source (if enabled) and get_random_bytes(). At initial DRBG seeding time during boot, the latter might not have collected sufficient entropy for seeding itself yet and thus, the DRBG implementation schedules a reseed work from a random_ready_callback once that has happened. This is particularly important for the !->pr DRBG instances, for which (almost) no further reseeds are getting triggered during their lifetime. Because collecting data from the jitterentropy source is a rather expensive operation, the aforementioned asynchronously scheduled reseed work restricts itself to get_random_bytes() only. That is, it in some sense amends the initial DRBG seed derived from jitterentropy output at full (estimated) entropy with fresh randomness obtained from get_random_bytes() once that has been seeded with sufficient entropy itself. With the advent of rng_is_initialized(), there is no real need for doing the reseed operation from an asynchronously scheduled work anymore and a subsequent patch will make it synchronous by moving it next to related logic already present in drbg_generate(). However, for tracking whether a full reseed including the jitterentropy source is required or a "partial" reseed involving only get_random_bytes() would be sufficient already, the boolean struct drbg_state's ->seeded member must become a tristate value. Prepare for this by introducing the new enum drbg_seed_state and change struct drbg_state's ->seeded member's type from bool to that type. For facilitating review, enum drbg_seed_state is made to only contain two members corresponding to the former ->seeded values of false and true resp. at this point: DRBG_SEED_STATE_UNSEEDED and DRBG_SEED_STATE_FULL. A third one for tracking the intermediate state of "seeded from jitterentropy only" will be introduced with a subsequent patch. There is no change in behaviour at this point. Signed-off-by: Nicolai Stange <nstange@suse.de> Reviewed-by: Stephan Müller <smueller@chronox.de> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-06-06 08:42:42 +02:00
arch	xtensa: use fallback for random_get_entropy() instead of zero	2022-05-30 09:33:42 +02:00
block	block-map: add __GFP_ZERO flag for alloc_page in function bio_copy_kern	2022-05-12 12:25:45 +02:00
certs	certs: Trigger creation of RSA module signing key if it's not an RSA key	2021-09-15 09:50:29 +02:00
crypto	crypto: drbg - prepare for more fine-grained tracking of seeding state	2022-06-06 08:42:42 +02:00
Documentation	random: fix sysctl documentation nits	2022-05-30 09:33:40 +02:00
drivers	drm/i915: Fix -Wstringop-overflow warning in call to intel_read_wm_latency()	2022-06-06 08:42:42 +02:00
fs	exfat: check if cluster num is valid	2022-06-06 08:42:42 +02:00
include	crypto: drbg - prepare for more fine-grained tracking of seeding state	2022-06-06 08:42:42 +02:00
init	random: handle latent entropy and command line from random_init()	2022-05-30 09:33:44 +02:00
ipc	shm: extend forced shm destroy to support objects from several IPC nses	2021-12-01 09:19:10 +01:00
kernel	timekeeping: Add raw clock fallback for random_get_entropy()	2022-05-30 09:33:41 +02:00
lib	lib/crypto: add prompts back to crypto libraries	2022-06-06 08:42:42 +02:00
LICENSES	LICENSES/deprecated: add Zlib license text	2020-09-16 14:33:49 +02:00
mm	random: move randomize_page() into mm where it belongs	2022-05-30 09:33:45 +02:00
net	cfg80211: set custom regdomain after wiphy registration	2022-06-06 08:42:41 +02:00
samples	samples/bpf, xdpsock: Fix race when running for fix duration of time	2022-04-08 14:40:21 +02:00
scripts	gcc-plugins: latent_entropy: use /dev/urandom	2022-04-20 09:23:26 +02:00
security	lockdown: also lock down previous kgdb use	2022-05-30 09:33:22 +02:00
sound	ALSA: ctxfi: Add SB046x PCI ID	2022-05-30 09:33:45 +02:00
tools	selftests: add ping test with ping_group_range tuned	2022-05-25 09:18:00 +02:00
usr	usr/include/Makefile: add linux/nfc.h to the compile-test coverage	2022-02-01 17:25:48 +01:00
virt	KVM: Prevent module exit until all VMs are freed	2022-04-08 14:40:38 +02:00
.clang-format	RDMA 5.10 pull request	2020-10-17 11:18:18 -07:00
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore	kbuild: generate Module.symvers only when vmlinux exists	2021-05-19 10:12:59 +02:00
.mailmap	mailmap: add two more addresses of Uwe Kleine-König	2020-12-06 10:19:07 -08:00
COPYING	COPYING: state that all contributions really are covered by this file	2020-02-10 13:32:20 -08:00
CREDITS	MAINTAINERS: Move Jason Cooper to CREDITS	2020-11-30 10:20:34 +01:00
Kbuild	kbuild: rename hostprogs-y/always to hostprogs/always-y	2020-02-04 01:53:07 +09:00
Kconfig	kbuild: ensure full rebuild when the compiler is updated	2020-05-12 13:28:33 +09:00
MAINTAINERS	MAINTAINERS: add git tree for random.c	2022-05-30 09:33:24 +02:00
Makefile	Linux 5.10.119	2022-05-30 09:33:46 +02:00
README

README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.