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random: update comment from copy_to_user() -> copy_to_iter()

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commit 63b8ea5e4f upstream.

This comment wasn't updated when we moved from read() to read_iter(), so
this patch makes the trivial fix.

Fixes: 1b388e7765 ("random: convert to using fops->read_iter()")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Jason A. Donenfeld 2022-06-20 11:03:48 +02:00 • committed by Greg Kroah-Hartman
commit feb5ab7986
1 changed files with 1 additions and 1 deletions
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2
drivers/char/random.c
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@ -452,7 +452,7 @@ static ssize_t get_random_bytes_user(struct iov_iter *iter)
/* /*
* Immediately overwrite the ChaCha key at index 4 with random * Immediately overwrite the ChaCha key at index 4 with random
* bytes, in case userspace causes copy_to_user() below to sleep * bytes, in case userspace causes copy_to_iter() below to sleep
* forever, so that we still retain forward secrecy in that case. * forever, so that we still retain forward secrecy in that case.
*/ */
crng_make_state(chacha_state, (u8 *)&chacha_state[4], CHACHA_KEY_SIZE); crng_make_state(chacha_state, (u8 *)&chacha_state[4], CHACHA_KEY_SIZE);