From: Eric Biggers <ebiggers@xxxxxxxxxx>
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: stable@xxxxxxxxxxxxxxx
Cc: linux-crypto@xxxxxxxxxxxxxxx
Cc: Andy Lutomirski <luto@xxxxxxxxxx>
Cc: Jann Horn <jannh@xxxxxxxxxx>
Cc: Theodore Ts'o <tytso@xxxxxxx>
Reviewed-by: Jann Horn <jannh@xxxxxxxxxx>
Acked-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
Signed-off-by: Eric Biggers <ebiggers@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20210112192818.69921-1-ebiggers@xxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/char/random.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/char/random.c
+++ b/drivers/char/random.c
@@ -1972,7 +1972,7 @@ 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:
