Re: [PATCH v2] RDMA/erdma: Use vcalloc() instead of vzalloc()

[Jason Gunthorpe <jgg@nvidia.com>]

On Thu, Aug 21, 2025 at 03:22:09PM +0800, Qianfeng Rong wrote:
> Replace vzalloc() with vcalloc() in vmalloc_to_dma_addrs().  As noted
> in the kernel documentation [1], open-coded multiplication in allocator
> arguments is discouraged because it can lead to integer overflow.
> 
> Use vcalloc() to gain built-in overflow protection, making memory
> allocation safer when calculating allocation size compared to explicit
> multiplication.
> 
> [1]: https://www.kernel.org/doc/html/next/process/deprecated.html#open-coded-arithmetic-in-allocator-arguments
> 
> Signed-off-by: Qianfeng Rong <rongqianfeng@vivo.com>
> ---
> v2: change sizeof(dma_addr_t) to sizeof(*pg_dma) to improve code
>     robustness as suggested by Markus.
> ---
>  drivers/infiniband/hw/erdma/erdma_verbs.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Applied to for-next, thanks

Jason