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* [PATCH] keys: Remove outdated __user annotations
@ 2020-11-23 23:54 Jann Horn
  0 siblings, 0 replies; only message in thread
From: Jann Horn @ 2020-11-23 23:54 UTC (permalink / raw)
  To: David Howells, Jarkko Sakkinen; +Cc: keyrings, linux-kernel

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@google.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,

base-commit: d5beb3140f91b1c8a3d41b14d729aefa4dcc58bc
-- 
2.29.2.454.gaff20da3a2-goog


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2020-11-23 23:54 [PATCH] keys: Remove outdated __user annotations Jann Horn

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