mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 03:10:12 +00:00
staging: sb105x: fix potential NULL pointer dereference in mp_chars_in_buffer()
The dereference to 'state' should be moved below the NULL test. Cc: Steven Rostedt <srostedt@redhat.com> Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
parent
218cbbd821
commit
b0ab023611
1 changed files with 2 additions and 1 deletions
|
@ -689,13 +689,14 @@ static int mp_chars_in_buffer(struct tty_struct *tty)
|
|||
static void mp_flush_buffer(struct tty_struct *tty)
|
||||
{
|
||||
struct sb_uart_state *state = tty->driver_data;
|
||||
struct sb_uart_port *port = state->port;
|
||||
struct sb_uart_port *port;
|
||||
unsigned long flags;
|
||||
|
||||
if (!state || !state->info) {
|
||||
return;
|
||||
}
|
||||
|
||||
port = state->port;
|
||||
spin_lock_irqsave(&port->lock, flags);
|
||||
uart_circ_clear(&state->info->xmit);
|
||||
spin_unlock_irqrestore(&port->lock, flags);
|
||||
|
|
Loading…
Reference in a new issue