diff options
| author | Konstantin Belousov <kib@FreeBSD.org> | 2021-05-13 01:35:06 +0000 |
|---|---|---|
| committer | Konstantin Belousov <kib@FreeBSD.org> | 2021-05-25 07:15:51 +0000 |
| commit | 4abc8e0a7335e2e79e3bb03eaed660ddc9c72bba (patch) | |
| tree | 1387350705b3d2542ebac8509693a02ae064e8c8 | |
| parent | 72fe4684e01b0059104de5e6300515f3702ad87c (diff) | |
ttydev_write: prevent stops while terminal is busied
PR: 255816
(cherry picked from commit 8cf912b017a04a2eec01fbaa1f7b9ef556403ede)
| -rw-r--r-- | sys/kern/tty.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/sys/kern/tty.c b/sys/kern/tty.c index 00b4df675311..8700eb8f9ef1 100644 --- a/sys/kern/tty.c +++ b/sys/kern/tty.c @@ -525,7 +525,7 @@ static int ttydev_write(struct cdev *dev, struct uio *uio, int ioflag) { struct tty *tp = dev->si_drv1; - int error; + int defer, error; error = ttydev_enter(tp); if (error) @@ -549,7 +549,9 @@ ttydev_write(struct cdev *dev, struct uio *uio, int ioflag) } tp->t_flags |= TF_BUSY_OUT; + defer = sigdeferstop(SIGDEFERSTOP_ERESTART); error = ttydisc_write(tp, uio, ioflag); + sigallowstop(defer); tp->t_flags &= ~TF_BUSY_OUT; cv_signal(&tp->t_outserwait); } |