From: Eric Biggers <ebigg...@google.com>
commit 11a0b5e0ec8c13bef06f7414f9e914506140d5cb upstream.
The RNDRESEEDCRNG ioctl reseeds the primary_crng from itself, which
doesn't make sense. Reseed it from the input_pool instead.
Fixes: d848e5f8e1eb ("random: add new ioctl RNDRESEEDCRNG")
Cc: sta...@vger.kernel.org
Cc: linux-crypto@vger.kernel.org
Cc: Andy Lutomirski <l...@kernel.org>
Cc: Jann Horn <ja...@google.com>
Cc: Theodore Ts'o <ty...@mit.edu>
Reviewed-by: Jann Horn <ja...@google.com>
Acked-by: Ard Biesheuvel <a...@kernel.org>
Signed-off-by: Eric Biggers <ebigg...@google.com>
Link: https://lore.kernel.org/r/20210112192818.69921-1-ebigg...@kernel.org
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/char/random.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -2071,7 +2071,7 @@ static long random_ioctl(struct file *f,
return -EPERM;
if (crng_init < 2)
return -ENODATA;
- crng_reseed(&primary_crng, NULL);
+ crng_reseed(&primary_crng, &input_pool);
crng_global_init_time = jiffies - 1;
return 0;
default:
