X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=drivers%2Ftty%2Fpty.c;h=7cb36813aac2bbded76575f36620d4ec510b1a98;hb=106f1ce29f1fa7ad18e47823789c176df57d75ee;hp=abfd9908978188ffe3bfd7a9c3aa3e8c6700c5d9;hpb=1e876e3b1a9df25bb04682b0d48aaa7e8ae1fc82;p=firefly-linux-kernel-4.4.55.git

diff --git a/drivers/tty/pty.c b/drivers/tty/pty.c
index abfd99089781..7cb36813aac2 100644
--- 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);