diff options
| -rw-r--r-- | sys/kern/tty_tty.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/sys/kern/tty_tty.c b/sys/kern/tty_tty.c index 8a04185..0b10f83 100644 --- a/sys/kern/tty_tty.c +++ b/sys/kern/tty_tty.c @@ -31,8 +31,12 @@ __FBSDID("$FreeBSD$"); #include <sys/conf.h> #include <sys/kernel.h> #include <sys/proc.h> +#include <sys/sx.h> #include <sys/vnode.h> +#include <fs/devfs/devfs.h> +#include <fs/devfs/devfs_int.h> + static d_open_t cttyopen; static struct cdevsw ctty_cdevsw = { @@ -60,6 +64,11 @@ ctty_clone(void *arg, struct ucred *cred, char *name, int namelen, return; if (strcmp(name, "tty")) return; + sx_sunlock(&clone_drain_lock); + mtx_lock(&Giant); + sx_slock(&proctree_lock); + sx_slock(&clone_drain_lock); + dev_lock(); if (!(curthread->td_proc->p_flag & P_CONTROLT)) *dev = ctty; else if (curthread->td_proc->p_session->s_ttyvp == NULL) @@ -70,7 +79,10 @@ ctty_clone(void *arg, struct ucred *cred, char *name, int namelen, *dev = ctty; } else *dev = curthread->td_proc->p_session->s_ttyvp->v_rdev; - dev_ref(*dev); + dev_refl(*dev); + dev_unlock(); + sx_sunlock(&proctree_lock); + mtx_unlock(&Giant); } static void |
