Merge branch 'v3.10/topic/gator' into linux-linaro-lsk-v3.10

[firefly-linux-kernel-4.4.55.git] / drivers / tty / pty.c

diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index abfd9908978188ffe3bfd7a9c3aa3e8c6700c5d9..7cb36813aac2bbded76575f36620d4ec510b1a98 100644 (file)
--- a/drivers/tty/pty.c
+++ b/drivers/tty/pty.c
@@ -215,6 +215,9 @@ static int pty_signal(struct tty_struct *tty, int sig)
        unsigned long flags;
        struct pid *pgrp;
 
+       if (sig != SIGINT && sig != SIGQUIT && sig != SIGTSTP)
+               return -EINVAL;
+
        if (tty->link) {
                spin_lock_irqsave(&tty->link->ctrl_lock, flags);
                pgrp = get_pid(tty->link->pgrp);