On 5/20/19 9:00 AM, Greg KH wrote:
> On Mon, May 20, 2019 at 02:40:14PM +0200, Pavel Machek wrote:
>>
>> In lecd_attach, if arg is < 0, it was treated as 0. Spectre v1 fix
>> changed that. Bug does not exist in mainline AFAICT.
>>
>> Signed-off-by: Pavel Machek <pa...@denx.de>
>> # for 4.19.y
>>
>> diff --git a/net/atm/lec.c b/net/atm/lec.c
>> index ad4f829193f0..ed279cd912f4 100644
>> --- a/net/atm/lec.c
>> +++ b/net/atm/lec.c
>> @@ -731,7 +731,7 @@ static int lecd_attach(struct atm_vcc *vcc, int arg)
>> i = arg;
>> if (arg >= MAX_LEC_ITF)
>> return -EINVAL;
>> - i = array_index_nospec(arg, MAX_LEC_ITF);
>> + i = array_index_nospec(i, MAX_LEC_ITF);
>> if (!dev_lec[i]) {
>> int size;
>>
>
> Why is this only for 4.19.y? What is different in Linus's tree that
> makes this not needed there?
>
The only difference is this clean up:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fdd1a8103a6df50bdeacd8bb04c3f6976cb9ae41
As Dan says, the code works fine, but the *i* value wasn't being used
anymore, so that piece of code was a bit confusing.
Thanks
--
Gustavo
