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Filename Latest commit message Latest commit date
Jason A. Donenfeld db1d13fe4c arm: use fallback for random_get_entropy() instead of zero
commit ff8a8f59c99f6a7c656387addc4d9f2247d75077 upstream.

In the event that random_get_entropy() can't access a cycle counter or
similar, falling back to returning 0 is really not the best we can do.
Instead, at least calling random_get_entropy_fallback() would be
preferable, because that always needs to return _something_, even
falling back to jiffies eventually. It's not as though
random_get_entropy_fallback() is super high precision or guaranteed to
be entropic, but basically anything that's not zero all the time is
better than returning zero all the time.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2022-06-22 14:11:15 +02:00
arch arm: use fallback for random_get_entropy() instead of zero 2022-06-22 14:11:15 +02:00
block
certs
crypto random: replace custom notifier chain with standard one 2022-06-22 14:11:13 +02:00
Documentation random: fix sysctl documentation nits 2022-06-22 14:11:14 +02:00
drivers random: document crng_fast_key_erasure() destination possibility 2022-06-22 14:11:14 +02:00
fs compat_ioctl: remove /dev/random commands 2022-06-22 14:11:03 +02:00
include timekeeping: Add raw clock fallback for random_get_entropy() 2022-06-22 14:11:15 +02:00
init init: call time_init() before rand_initialize() 2022-06-22 14:11:14 +02:00
ipc
kernel timekeeping: Add raw clock fallback for random_get_entropy() 2022-06-22 14:11:15 +02:00
lib random: replace custom notifier chain with standard one 2022-06-22 14:11:13 +02:00
LICENSES
mm
net tcp: fix tcp_mtup_probe_success vs wrong snd_cwnd 2022-06-14 18:12:03 +02:00
samples
scripts scripts/gdb: change kernel config dumping method 2022-06-14 18:12:02 +02:00
security
sound ALSA: hda/conexant - Fix loopback issue with CX20632 2022-06-14 18:12:02 +02:00
tools netfilter: nat: really support inet nat without l3 address 2022-06-14 18:11:57 +02:00
usr
virt
.clang-format
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS MAINTAINERS: co-maintain random.c 2022-06-22 14:11:05 +02:00
Makefile Linux 5.4.199 2022-06-16 13:23:32 +02:00
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.