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authorEric Biggers <ebiggers@google.com>2021-01-12 11:28:18 -0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-02-04 16:59:02 +0100
commit11a0b5e0ec8c13bef06f7414f9e914506140d5cb (patch)
tree7a023fe157df59956311db2a0c7cc673ea602c04 /drivers/char
parenta74ab2ed0def52a993d0cbd9df9d1c4de33c6fbd (diff)
random: fix the RNDRESEEDCRNG ioctl
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@vger.kernel.org Cc: linux-crypto@vger.kernel.org Cc: Andy Lutomirski <luto@kernel.org> Cc: Jann Horn <jannh@google.com> Cc: Theodore Ts'o <tytso@mit.edu> Reviewed-by: Jann Horn <jannh@google.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Eric Biggers <ebiggers@google.com> Link: https://lore.kernel.org/r/20210112192818.69921-1-ebiggers@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/random.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/char/random.c b/drivers/char/random.c
index 5f3b8ac9d97b..a894c0559a8c 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: