diff options
| author | Peter Hurley <peter@hurleysoftware.com> | 2016-01-10 07:55:26 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-01-28 01:41:04 +0100 |
| commit | eab25a5cd1f91b5c7991affe95f24ce188b8021f (patch) | |
| tree | 8efd0ba7f8f17d89c08503b224c959fa92ef2a00 | |
| parent | tty: audit: Early-out pty master reads earlier (diff) | |
| download | linux-eab25a5cd1f91b5c7991affe95f24ce188b8021f.tar.xz linux-eab25a5cd1f91b5c7991affe95f24ce188b8021f.zip | |
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>
| -rw-r--r-- | drivers/tty/n_tty.c | 17 |
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--; } |