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authorScot Doyle <lkml14@scotdoyle.com>2016-10-13 12:12:43 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-10-27 17:19:35 +0200
commit009e39ae44f4191188aeb6dfbf661b771dbbe515 (patch)
treed3baf03a7b656f4d5aaa6ecc89547bcfbf05d1d5 /drivers/tty/vt/vt.c
parent03842c17397e14cb8bb1adc2015f5dce6c733ffe (diff)
downloadlinux-009e39ae44f4191188aeb6dfbf661b771dbbe515.tar.bz2
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>
Diffstat (limited to 'drivers/tty/vt/vt.c')
-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 26cda08bc611..8c3bf3d613c0 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;