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authorPeter Hurley <peter@hurleysoftware.com>2016-01-10 09:55:26 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-01-28 03:41:04 +0300
commiteab25a5cd1f91b5c7991affe95f24ce188b8021f (patch)
tree8efd0ba7f8f17d89c08503b224c959fa92ef2a00 /drivers/tty/n_tty.c
parentd7c0ba40ebb32510e2c5d80a392474320cab8a2d (diff)
downloadlinux-eab25a5cd1f91b5c7991affe95f24ce188b8021f.tar.xz
tty: audit: Never audit packet mode
tty audit never logs pty master reads, but packet mode only works for pty masters, so tty_audit_add_data() was never logging packet mode anyway. Don't audit packet mode data. As those are the lone call sites, remove tty_put_user(). Signed-off-by: Peter Hurley <peter@hurleysoftware.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/n_tty.c')
-rw-r--r--drivers/tty/n_tty.c17
1 files changed, 4 insertions, 13 deletions
diff --git a/drivers/tty/n_tty.c b/drivers/tty/n_tty.c
index f4555a261420..bacafda44bf3 100644
--- a/drivers/tty/n_tty.c
+++ b/drivers/tty/n_tty.c
@@ -153,15 +153,6 @@ static inline unsigned char *echo_buf_addr(struct n_tty_data *ldata, size_t i)
return &ldata->echo_buf[i & (N_TTY_BUF_SIZE - 1)];
}
-static inline int tty_put_user(struct tty_struct *tty, unsigned char x,
- unsigned char __user *ptr)
-{
- struct n_tty_data *ldata = tty->disc_data;
-
- tty_audit_add_data(tty, &x, 1, ldata->icanon);
- return put_user(x, ptr);
-}
-
static int tty_copy_to_user(struct tty_struct *tty, void __user *to,
size_t tail, size_t n)
{
@@ -2197,11 +2188,11 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
cs = tty->link->ctrl_status;
tty->link->ctrl_status = 0;
spin_unlock_irq(&tty->link->ctrl_lock);
- if (tty_put_user(tty, cs, b++)) {
+ if (put_user(cs, b)) {
retval = -EFAULT;
- b--;
break;
}
+ b++;
nr--;
break;
}
@@ -2247,11 +2238,11 @@ static ssize_t n_tty_read(struct tty_struct *tty, struct file *file,
/* Deal with packet mode. */
if (packet && b == buf) {
- if (tty_put_user(tty, TIOCPKT_DATA, b++)) {
+ if (put_user(TIOCPKT_DATA, b)) {
retval = -EFAULT;
- b--;
break;
}
+ b++;
nr--;
}