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George Kennedy 7c57237d74 vt_ioctl: change VT_RESIZEX ioctl to check for error return from vc_resize() 
commit bc5269ca76 upstream.

vc_resize() can return with an error after failure. Change VT_RESIZEX ioctl
to save struct vc_data values that are modified and restore the original
values in case of error.

Signed-off-by: George Kennedy <george.kennedy@oracle.com>
Cc: stable <stable@vger.kernel.org>
Reported-by: syzbot+38a3699c7eaf165b97a6@syzkaller.appspotmail.com
Link: https://lore.kernel.org/r/1596213192-6635-2-git-send-email-george.kennedy@oracle.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
 		2020-09-03 11:27:03 +02:00
..
.gitignore tty: fix up a few remaining files without SPDX identifiers 2019-04-04 18:48:43 +02:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
consolemap.c tty/vt: avoid high order pages allocation on GIO_UNIMAP ioctl 2019-04-16 15:21:34 +02:00
cp437.uni tty: fix up a few remaining files without SPDX identifiers 2019-04-04 18:48:43 +02:00
defkeymap.c_shipped tty: fix up a few remaining files without SPDX identifiers 2019-04-04 18:48:43 +02:00
defkeymap.map tty: fix up a few remaining files without SPDX identifiers 2019-04-04 18:48:43 +02:00
keyboard.c vt: keyboard: avoid signed integer overflow in k_ascii 2020-06-10 20:24:56 +02:00
selection.c vt: selection, introduce vc_is_sel 2020-04-02 15:11:00 +02:00
vc_screen.c vcs: prevent write access to vcsu devices 2019-12-13 08:43:22 +01:00
vt.c vt: defer kfree() of vc_screenbuf in vc_do_resize() 2020-09-03 11:27:03 +02:00
vt_ioctl.c vt_ioctl: change VT_RESIZEX ioctl to check for error return from vc_resize() 2020-09-03 11:27:03 +02:00