This fixes a bug where a process can set the foreground process group to its
pid even if its pid is not a valid pgrp.
Signed-off-by: Patrick Donnelly <batr...@batbytes.com>
---
drivers/tty/tty_io.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/tty/tty_io.c b/drivers/tty/tty_io.c
index fbb55db..01b4769 100644
--- a/drivers/tty/tty_io.c
+++ b/drivers/tty/tty_io.c
@@ -2579,6 +2579,9 @@ static int tiocspgrp(struct tty_struct *tty, struct
tty_struct *real_tty, pid_t
retval = -ESRCH;
if (!pgrp)
goto out_unlock;
+ retval = -EINVAL;
+ if (!pid_task(pgrp, PIDTYPE_PGID))
+ goto out_unlock;
retval = -EPERM;
if (session_of_pgrp(pgrp) != task_session(current))
goto out_unlock;
--
Patrick Donnelly
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
