linux-kernel - [PATCH 2/9] keys: Remove outdated _

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Date:   Fri, 27 Nov 2020 16:45:40 +0000
From:   David Howells <dhowells@...hat.com>
To:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Cc:     Jann Horn <jannh@...gle.com>, dhowells@...hat.com,
        keyrings@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 2/9] keys: Remove outdated __user annotations

From: Jann Horn <jannh@...gle.com>

When the semantics of the ->read() handlers were changed such that "buffer"
is a kernel pointer, some __user annotations survived.
Since they're wrong now, get rid of them.

Fixes: d3ec10aa9581 ("KEYS: Don't write out to userspace while holding key semaphore")
Signed-off-by: Jann Horn <jannh@...gle.com>
Signed-off-by: David Howells <dhowells@...hat.com>
---

 security/keys/keyring.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/security/keys/keyring.c b/security/keys/keyring.c
index 14abfe765b7e..977066208387 100644
--- a/security/keys/keyring.c
+++ b/security/keys/keyring.c
@@ -452,7 +452,7 @@ static void keyring_describe(const struct key *keyring, struct seq_file *m)
 struct keyring_read_iterator_context {
 	size_t			buflen;
 	size_t			count;
-	key_serial_t __user	*buffer;
+	key_serial_t		*buffer;
 };
 
 static int keyring_read_iterator(const void *object, void *data)
@@ -479,7 +479,7 @@ static int keyring_read_iterator(const void *object, void *data)
  * times.
  */
 static long keyring_read(const struct key *keyring,
-			 char __user *buffer, size_t buflen)
+			 char *buffer, size_t buflen)
 {
 	struct keyring_read_iterator_context ctx;
 	long ret;
@@ -491,7 +491,7 @@ static long keyring_read(const struct key *keyring,
 
 	/* Copy as many key IDs as fit into the buffer */
 	if (buffer && buflen) {
-		ctx.buffer = (key_serial_t __user *)buffer;
+		ctx.buffer = (key_serial_t *)buffer;
 		ctx.buflen = buflen;
 		ctx.count = 0;
 		ret = assoc_array_iterate(&keyring->keys,