From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: Jiri Slaby <jslaby@suse.cz>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>,
Dmitry Torokhov <dmitry.torokhov@gmail.com>
Subject: Re: Out-of-bound access in sysrq
Date: Thu, 28 Mar 2013 07:19:35 -0600 [thread overview]
Message-ID: <51544367.2020904@linaro.org> (raw)
In-Reply-To: <51541C9B.4000802@suse.cz>
On 13-03-28 04:34 AM, Jiri Slaby wrote:
> Guys,
>
> how is this supposed to work?
>
> #define SYSRQ_KEY_RESET_MAX 20 /* Should be plenty */
> static unsigned short sysrq_reset_seq[SYSRQ_KEY_RESET_MAX];
> ...
> unsigned short platform_sysrq_reset_seq[] __weak = { KEY_RESERVED };
> ...
> static inline void sysrq_register_handler(void)
> {
> ...
> for (i = 0; i < ARRAY_SIZE(sysrq_reset_seq); i++) {
> key = platform_sysrq_reset_seq[i];
> if (key == KEY_RESERVED || key > KEY_MAX)
> ...
>
>
>
>
> i runs from 0 to 19 incl., but platform_sysrq_reset_seq, if not
> overriden, is of size 1, so?
>
> thanks,
>
Unless I'm missing something, 'i' won't go higher than '0' since the
first element of platform_sysrq_reset_seq is set to KEY_RESERVED and in
such case the 'break' is executed.
next prev parent reply other threads:[~2013-03-28 13:19 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-28 10:34 Out-of-bound access in sysrq Jiri Slaby
2013-03-28 13:19 ` Mathieu Poirier [this message]
2013-03-28 13:28 ` Jiri Slaby
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