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| author | Peter Hurley <peter@hurleysoftware.com> | 2015-11-08 17:06:05 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2015-12-14 06:59:48 +0300 |
| commit | d1d3a0f7448fe038ce7e94e2c281dcd2f91b23c6 (patch) | |
| tree | 8de2708afcb48978fc33e2d0e9a5e9fc4ddce8d7 /drivers/tty/tty_io.c | |
| parent | 83db1df4461c8731a413cd6cb1cbf351f01a57b1 (diff) | |
| download | linux-d1d3a0f7448fe038ce7e94e2c281dcd2f91b23c6.tar.xz | |
tty: Only allow slave pty as controlling tty
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/tty_io.c')
| -rw-r--r-- | drivers/tty/tty_io.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c index f38ae01c3917..892c92354745 100644 --- a/drivers/tty/tty_io.c +++ b/drivers/tty/tty_io.c @@ -2866,7 +2866,7 @@ 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: |