3.16.7-ckt14 -stable review patch. If anyone has any objections, please let me know.
------------------
From: Laura Abbott <labbott@xxxxxxxxxxxxxxxxx>
commit 72586c6061ab8c23ffd9f301ed19782a44ff5f04 upstream.
Commit 32f13521ca68bc624ff6effc77f308a52b038bf0
("n_tty: Line copy to user buffer in canonical mode")
changed cannonical mode copying to use copy_to_user
but missed adding the call to the audit framework.
Add in the appropriate functions to get audit support.
Fixes: 32f13521ca68 ("n_tty: Line copy to user buffer in canonical mode")
Reported-by: Miloslav Trmač <mitr@xxxxxxxxxx>
Signed-off-by: Laura Abbott <labbott@xxxxxxxxxxxxxxxxx>
Reviewed-by: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
[ luis: backported to 3.16: adjusted context ]
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
---
drivers/tty/n_tty.c | 17 ++++++++++++++---
1 file changed, 14 insertions(+), 3 deletions(-)
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index 35de4adc3f1d..39ec99fbb135 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -161,6 +161,17 @@ static inline int tty_put_user(struct tty_struct *tty, unsigned char x,
return put_user(x, ptr);
}
+static inline int tty_copy_to_user(struct tty_struct *tty,
+ void __user *to,
+ const void *from,
+ unsigned long n)
+{
+ struct n_tty_data *ldata = tty->disc_data;
+
+ tty_audit_add_data(tty, to, n, ldata->icanon);
+ return copy_to_user(to, from, n);
+}
+
static int receive_room(struct tty_struct *tty)
{
struct n_tty_data *ldata = tty->disc_data;
@@ -2081,12 +2092,12 @@ static int canon_copy_from_read_buf(struct tty_struct *tty,
__func__, eol, found, n, c, size, more);
if (n > size) {
- ret = copy_to_user(*b, read_buf_addr(ldata, tail), size);
+ ret = tty_copy_to_user(tty, *b, read_buf_addr(ldata, tail), size);
if (ret)
return -EFAULT;
- ret = copy_to_user(*b + size, ldata->read_buf, n - size);
+ ret = tty_copy_to_user(tty, *b + size, ldata->read_buf, n - size);
} else
- ret = copy_to_user(*b, read_buf_addr(ldata, tail), n);
+ ret = tty_copy_to_user(tty, *b, read_buf_addr(ldata, tail), n);
if (ret)
return -EFAULT;
--
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