[rtems commit] termios: Avoid invalid memory access

[Sebastian Huber]

Module:    rtems
Branch:    master
Commit:    94a4865c0c4257196827ef426150026980d4a10b
Changeset: http://git.rtems.org/rtems/commit/?id=94a4865c0c4257196827ef426150026980d4a10b

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Mon Mar 27 10:30:23 2017 +0200

termios: Avoid invalid memory access

Update #2897.

---

 cpukit/libcsupport/src/termios.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/cpukit/libcsupport/src/termios.c b/cpukit/libcsupport/src/termios.c
index a7944ec..6557135 100644
--- a/cpukit/libcsupport/src/termios.c
+++ b/cpukit/libcsupport/src/termios.c
@@ -847,7 +847,7 @@ rtems_termios_ioctl (void *arg)
   struct rtems_termios_tty *tty = args->iop->data1;
   struct ttywakeup         *wakeup = (struct ttywakeup *)args->buffer;
   rtems_status_code sc;
-  int flags = *((int *)args->buffer);
+  int flags;
 
   args->ioctl_return = 0;
   sc = rtems_semaphore_obtain (tty->osem, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
@@ -920,6 +920,8 @@ rtems_termios_ioctl (void *arg)
     break;
 
   case TIOCFLUSH:
+    flags = *((int *)args->buffer);
+
     if (flags == 0) {
       flags = FREAD | FWRITE;
     } else {