Re: [PATCH v2] serial: max310x: Fix out of bounds access
From: Kang Yin Su
Date: Wed Aug 12 2015 - 07:50:30 EST
On 12 August 2015 at 17:46, Alexander Shiyan <shc_work@xxxxxxx> wrote:
>> ÐÑÐÐÐ, 12 ÐÐÐÑÑÑÐ 2015, 15:36 +08:00 ÐÑ cantona <cantona@xxxxxxxxxxx>:
>> added Alexander Shiyan < shc_work@xxxxxxx >.
>> On 12 August 2015 at 15:22, Su Kang Yin < cantona@xxxxxxxxxxx > wrote:
>> >Max310x driver supports up to 4 UART devices but array size of
>> >"struct max310x_one" is set to 1. That leads to out of bounds
>> >access on UART port registration.
>> >This patch fixed it by increase the array size to 4 which is
>> >maximum supported UART.
>> >Signed-off-by: Su Kang Yin < cantona@xxxxxxxxxxx >
> This seems incorrect. The number of ports is allocated dynamically by:
> /* Alloc port structure */
> s = devm_kzalloc(dev, sizeof(*s) + sizeof(struct max310x_one) * devtype->nr, GFP_KERNEL);
Oh, my bad. But it looks confusing. So we must ensure "struct
max310x_one p" must the last element of "struct max310x_port".
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