From: Eric Biggers <ebigg...@google.com>
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-cry...@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>
Signed-off-by: Eric Biggers <ebigg...@google.com>
---
Andrew, please consider taking this patch since the maintainer has been
ignoring it for 4 months
(https://lkml.kernel.org/lkml/20200916041908.66649-1-ebigg...@kernel.org/T/#u).
drivers/char/random.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/char/random.c b/drivers/char/random.c
index 5f3b8ac9d97b0..a894c0559a8cf 100644
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1972,7 +1972,7 @@ static long random_ioctl(struct file *f, unsigned int
cmd, unsigned long arg)
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:
--
2.30.0
