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n_tty: Fix auditing support for cannonical mode 

Commit 32f13521ca
("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: 32f13521ca ("n_tty: Line copy to user buffer in canonical mode")
Reported-by: Miloslav Trmač <mitr@redhat.com>
Signed-off-by: Laura Abbott <labbott@fedoraproject.org>
Reviewed-by: Peter Hurley <peter@hurleysoftware.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Laura Abbott 2015-05-14 11:42:17 -07:00 committed by Greg Kroah-Hartman
parent 9809889c70
commit 72586c6061
1 changed files with 14 additions and 3 deletions
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17
drivers/tty/n_tty.c
View File

@ -162,6 +162,17 @@ 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);
}
/**
* n_tty_kick_worker - start input worker (if required)
* @tty: terminal
@ -2084,12 +2095,12 @@ 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;