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author | Sasha Levin <sasha.levin@oracle.com> | 2014-03-28 17:38:42 +0100 |
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committer | David S. Miller <davem@davemloft.net> | 2014-03-28 16:04:19 -0400 |
commit | 05efa8c943b1d5d90fa8c8147571837573338bb6 (patch) | |
tree | 7882312770611805d896178894810f0d9467469b /lib/zlib_deflate | |
parent | 335a67d2ad481b03607bf30a38c28178fa1ad61a (diff) | |
download | linux-05efa8c943b1d5d90fa8c8147571837573338bb6.tar.gz |
random32: avoid attempt to late reseed if in the middle of seeding
Commit 4af712e8df ("random32: add prandom_reseed_late() and call when
nonblocking pool becomes initialized") has added a late reseed stage
that happens as soon as the nonblocking pool is marked as initialized.
This fails in the case that the nonblocking pool gets initialized
during __prandom_reseed()'s call to get_random_bytes(). In that case
we'd double back into __prandom_reseed() in an attempt to do a late
reseed - deadlocking on 'lock' early on in the boot process.
Instead, just avoid even waiting to do a reseed if a reseed is already
occuring.
Fixes: 4af712e8df99 ("random32: add prandom_reseed_late() and call when nonblocking pool becomes initialized")
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib/zlib_deflate')
0 files changed, 0 insertions, 0 deletions