linux-kernel - Re: [PATCH] HID: amd_sfh: Add missing check for dma_alloc

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Tue, 20 Dec 2022 12:22:45 +0530
From:   Basavaraj Natikar <bnatikar@....com>
To:     Jiasheng Jiang <jiasheng@...as.ac.cn>, basavaraj.natikar@....com,
        jikos@...nel.org, benjamin.tissoires@...hat.com
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] HID: amd_sfh: Add missing check for dma_alloc_coherent


On 12/20/2022 8:19 AM, Jiasheng Jiang wrote:
> Add check for the return value of the dma_alloc_coherent since
> it may return NULL pointer if allocation fails.
>
> Fixes: 4b2c53d93a4b ("SFH:Transport Driver to add support of AMD Sensor Fusion Hub (SFH)")
> Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn>
> ---
>  drivers/hid/amd-sfh-hid/amd_sfh_client.c | 4 ++++
>  1 file changed, 4 insertions(+)
>
> diff --git a/drivers/hid/amd-sfh-hid/amd_sfh_client.c b/drivers/hid/amd-sfh-hid/amd_sfh_client.c
> index 8275bba63611..ab125f79408f 100644
> --- a/drivers/hid/amd-sfh-hid/amd_sfh_client.c
> +++ b/drivers/hid/amd-sfh-hid/amd_sfh_client.c
> @@ -237,6 +237,10 @@ int amd_sfh_hid_client_init(struct amd_mp2_dev *privdata)
>  		in_data->sensor_virt_addr[i] = dma_alloc_coherent(dev, sizeof(int) * 8,
>  								  &cl_data->sensor_dma_addr[i],
>  								  GFP_KERNEL);
> +		if (!in_data->sensor_virt_addr[i]) {
> +			rc = -ENOMEM;
> +			goto cleanup;
> +		}
>  		cl_data->sensor_sts[i] = SENSOR_DISABLED;
>  		cl_data->sensor_requested_cnt[i] = 0;
>  		cl_data->cur_hid_dev = i;

looks good to me.

Acked-by: Basavaraj Natikar <Basavaraj.Natikar@....com>

Thanks,
--
Basavaraj