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Fix some bugs in the /dev/random driver which causes getrandom(2) to

Browse source 
unblock earlier than designed.  Thanks to Jann Horn from Google's
 Project Zero for pointing this out to me.
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Merge tag 'random_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random

Pull /dev/random fixes from Ted Ts'o:
 "Fix some bugs in the /dev/random driver which causes getrandom(2) to
  unblock earlier than designed.

  Thanks to Jann Horn from Google's Project Zero for pointing this out
  to me"

* tag 'random_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/random:
  random: add new ioctl RNDRESEEDCRNG
  random: crng_reseed() should lock the crng instance that it is modifying
  random: set up the NUMA crng instances after the CRNG is fully initialized
  random: use a different mixing algorithm for add_device_randomness()
  random: fix crng_ready() test
This commit is contained in:
Linus Torvalds 2018-04-21 21:20:48 -07:00
commit 285848b0f4
2 changed files with 100 additions and 31 deletions
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3
include/uapi/linux/random.h
View file

@ -35,6 +35,9 @@
/* Clear the entropy pool and associated counters. (Superuser only.) */
#define RNDCLEARPOOL _IO( 'R', 0x06 )
/* Reseed CRNG. (Superuser only.) */
#define RNDRESEEDCRNG _IO( 'R', 0x07 )
struct rand_pool_info {
int entropy_count;
int buf_size;