Re: [PATCH 6/9] serial: samsung: Fix out-of-bounds access through DT alias

On Tue, Feb 20, 2018 at 10:40 AM, Geert Uytterhoeven
[off-list ref] wrote:

The s3c24xx_serial_ports[] array is indexed using a value derived from
the "serialN" alias in DT, which may lead to an out-of-bounds access.

Fix this by adding a range check.

Note that the array size is defined by a Kconfig symbol
(CONFIG_SERIAL_SAMSUNG_UARTS), so this can even be triggered using a
legitimate DTB.

Fixes: 3ac337e76a1c637b ("serial: samsung: Fix out-of-bounds access through DT alias")

Fixes: 13a9f6c64fdc55eb ("serial: samsung: Consider DT alias when probing po
rts")

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds