Commit 009e39ae authored Oct 13, 2016 by Scot Doyle Committed by Greg Kroah-Hartman Oct 27, 2016

vt: clear selection before resizing

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>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

parent 03842c17

drivers/tty/vt/vt.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -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;