Messages in this thread Patch in this message | | | From | Peter Hurley <> | Subject | [PATCH] tty: Only allow slave pty as controlling tty | Date | Sun, 8 Nov 2015 09:06:05 -0500 |
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A master pty should never be a controlling tty in Linux; if the master pty is specified to ioctl(TIOCSCTTY), silently substitute the slave pty as the controlling tty.
Signed-off-by: Peter Hurley <peter@hurleysoftware.com> --- drivers/tty/tty_io.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index 9fa5a4f..2f9c1c6 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -2862,7 +2862,7 @@ long tty_ioctl(struct file *file, unsigned int cmd, unsigned long arg) no_tty(); return 0; case TIOCSCTTY: - return tiocsctty(tty, file, arg); + return tiocsctty(real_tty, file, arg); case TIOCGPGRP: return tiocgpgrp(tty, real_tty, p); case TIOCSPGRP: -- 2.6.3
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