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authorScot Doyle <lkml14@scotdoyle.com>2016-10-13 12:12:43 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-11-10 16:36:34 +0100
commit3425e397fb23cc2e8e6fb8f5b8226dcb447e84dd (patch)
tree9f170e7a051b8095f620d2858e7704d09a5a0c8d /drivers/tty
parentdc1555e670c373bfa4ca2e1e2f839d5fe2b4501a (diff)
vt: clear selection before resizing
commit 009e39ae44f4191188aeb6dfbf661b771dbbe515 upstream. When resizing a vt its selection may exceed the new size, resulting in an invalid memory access [1]. Clear the selection before resizing. [1] http://lkml.kernel.org/r/CACT4Y+acDTwy4umEvf5ROBGiRJNrxHN4Cn5szCXE5Jw-d1B=Xw@mail.gmail.com Reported-and-tested-by: Dmitry Vyukov <dvyukov@google.com> Signed-off-by: Scot Doyle <lkml14@scotdoyle.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty')
-rw-r--r--drivers/tty/vt/vt.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/tty/vt/vt.c b/drivers/tty/vt/vt.c
index 136ebaaa9cc0..43c02004356d 100644
--- a/drivers/tty/vt/vt.c
+++ b/drivers/tty/vt/vt.c
@@ -876,6 +876,9 @@ static int vc_do_resize(struct tty_struct *tty, struct vc_data *vc,
if (!newscreen)
return -ENOMEM;
+ if (vc == sel_cons)
+ clear_selection();
+
old_rows = vc->vc_rows;
old_row_size = vc->vc_size_row;