[PATCH] readkey: force return from while true

[Marc Kleine-Budde]

On 11/22/2011 09:20 PM, Sascha Hauer wrote:
> On Tue, Nov 22, 2011 at 01:32:19PM +0100, Jan Weitzel wrote:
>> If read_key is feeded by STRG + KEY_LEFT you run into the while(1)
>> loop and corrupt memory through esc array.
>> Force return if index gets too high.
>>
> 
> Wow, a shortcut to crash barebox. Applied to master.
> 
> Sascha
> 
>> Signed-off-by: Jan Weitzel <j.weitzel at phytec.de>
>> ---
>>  lib/readkey.c |    2 ++
>>  1 files changed, 2 insertions(+), 0 deletions(-)
>>
>> diff --git a/lib/readkey.c b/lib/readkey.c
>> index a42d1cb..895db82 100644
>> --- a/lib/readkey.c
>> +++ b/lib/readkey.c
>> @@ -67,6 +67,8 @@ int read_key(void)
>>  				esc[i] = getc();
>>  				if (esc[i++] == '~')
>>  					break;
>> +				if (i == 5)

ARRAY_SIZE?

>> +					return -1;
>>  			}
>>  		}
>>  		esc[i] = 0;
>> -- 
>> 1.7.0.4
>>
>>
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>> http://lists.infradead.org/mailman/listinfo/barebox
>>
> 

Marc

-- 
Pengutronix e.K.                  | Marc Kleine-Budde           |
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