tree 327553c1f5d16c340ad4e46ea9cede117087523f
parent 2ae2d53518f272f270f4934b488bb20c84cc355b
author Jason A. Donenfeld <Jason@zx2c4.com> 1644428533 +0100
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1656150308 +0200

random: zero buffer after reading entropy from userspace

commit 7b5164fb1279bf0251371848e40bae646b59b3a8 upstream.

This buffer may contain entropic data that shouldn't stick around longer
than needed, so zero out the temporary buffer at the end of write_pool().

Reviewed-by: Dominik Brodowski <linux@dominikbrodowski.net>
Reviewed-by: Jann Horn <jannh@google.com>
Reviewed-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>