Re: [PATCH] um: vector: use kmalloc_objs() for the message vector

[Anton Ivanov]

On 20/10/2026 08:20, Hungyu Lin wrote:
> Allocate mmsg_vector with kmalloc_objs() so the element size is derived
> from the destination type and the allocation helper handles multiplication
> overflow. The default allocation flags remain GFP_KERNEL.
>
> Signed-off-by: Hungyu Lin <dennylin0707@xxxxxxxxx>
> ---
>   arch/um/drivers/vector_kern.c | 3 +--
>   1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/arch/um/drivers/vector_kern.c b/arch/um/drivers/vector_kern.c
> index e902e78c5ff6..d6127944b202 100644
> --- a/arch/um/drivers/vector_kern.c
> +++ b/arch/um/drivers/vector_kern.c
> @@ -528,8 +528,7 @@ static struct vector_queue *create_queue(
>   		return NULL;
>   	result->max_depth = max_size;
>   	result->dev = vp->dev;
> -	result->mmsg_vector = kmalloc(
> -		(sizeof(struct mmsghdr) * max_size), GFP_KERNEL);
> +	result->mmsg_vector = kmalloc_objs(*result->mmsg_vector, max_size);
>   	if (result->mmsg_vector == NULL)
>   		goto out_mmsg_fail;
>   	result->skbuff_vector = kmalloc(
>
> base-commit: 4ad423aa2108485f8bc5dde51fdf9c1ed979ee4b
Acked-By: Anton Ivanov <anton.ivanov@xxxxxxxxxxxxxxxxxx>

--
Anton R. Ivanov
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