Commits
Theodore Ts'o committed 812b51a6300
random: set up the NUMA crng instances after the CRNG is fully initialized commit 8ef35c866f8862df074a49a93b0309725812dea8 upstream. Until the primary_crng is fully initialized, don't initialize the NUMA crng nodes. Otherwise users of /dev/urandom on NUMA systems before the CRNG is fully initialized can get very bad quality randomness. Of course everyone should move to getrandom(2) where this won't be an issue, but there's a lot of legacy code out there. This related to CVE-2018-1108. Reported-by: Jann Horn <jannh@google.com> Fixes: 1e7f583af67b ("random: make /dev/urandom scalable for silly...") Cc: stable@kernel.org # 4.8+ Signed-off-by: Theodore Ts'o <tytso@mit.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>