linux-kernel - [PATCH v2 0/2] fix out-of-bounds access when specifying invalid console

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Message-Id: <20221209112737.3222509-1-svens@linux.ibm.com>
Date:   Fri,  9 Dec 2022 12:27:35 +0100
From:   Sven Schnelle <svens@...ux.ibm.com>
To:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>
Cc:     Christian Borntraeger <borntraeger@...ibm.com>,
        linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org
Subject: [PATCH v2 0/2] fix out-of-bounds access when specifying invalid console

Hi,

these two patches fix a crash in the tty driver when a user specifies an
invalid console like 'console=tty3000'. The first patch adds a check to
tty_driver_lookup_tty(), the second one prevents that such a console gets
registered in the vt driver.

Changes in v2:
- trim commit message in first patch
- add second patch as suggested by Jiri Slaby

Sven Schnelle (2):
  tty: fix out-of-bounds access in tty_driver_lookup_tty()
  tty/vt: prevent registration of console with invalid number

 drivers/tty/tty_io.c | 8 +++++---
 drivers/tty/vt/vt.c  | 6 ++++++
 2 files changed, 11 insertions(+), 3 deletions(-)

-- 
2.34.1