Re: [PATCH rdma-next 2/2] RDMA/qib: Fix truncation compilation warnings in qib_verbs.c

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On 7/1/24 8:42 AM, Leon Romanovsky wrote:
> From: Leon Romanovsky <leonro@xxxxxxxxxx>
> 
> Reduce nodename string size to fit IB_DEVICE_NODE_DESC_MAX.
> 
> drivers/infiniband/hw/qib/qib_verbs.c: In function ‘qib_register_ib_device’:
> drivers/infiniband/hw/qib/qib_verbs.c:1554:40: error: ‘%s’ directive output may be truncated writing up to 64 bytes into a region of size 43
> [-Werror=format-truncation=]
>  1554 |                  "Intel Infiniband HCA %s", init_utsname()->nodename);
>       |                                        ^~~~~~~~~~~~~~~~~~~~~~~~~~
> drivers/infiniband/hw/qib/qib_verbs.c:1553:9: note: ‘snprintf’ output between 22 and 86 bytes into a destination of size 64
>  1553 |         snprintf(ibdev->node_desc, sizeof(ibdev->node_desc),
>       |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>  1554 |                  "Intel Infiniband HCA %s", init_utsname()->nodename);
>       |                  ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> 
> cc1: all warnings being treated as errors
> 
> Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxx>
> ---
>  drivers/infiniband/hw/qib/qib_verbs.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/infiniband/hw/qib/qib_verbs.c b/drivers/infiniband/hw/qib/qib_verbs.c
> index 0080f0be72fe..5fcb41970ad9 100644
> --- a/drivers/infiniband/hw/qib/qib_verbs.c
> +++ b/drivers/infiniband/hw/qib/qib_verbs.c
> @@ -1551,7 +1551,7 @@ int qib_register_ib_device(struct qib_devdata *dd)
>  	ibdev->dev.parent = &dd->pcidev->dev;
>  
>  	snprintf(ibdev->node_desc, sizeof(ibdev->node_desc),
> -		 "Intel Infiniband HCA %s", init_utsname()->nodename);
> +		 "Intel Infiniband HCA %.42s", init_utsname()->nodename);
>  
>  	/*
>  	 * Fill in rvt info object.

Acked-by: Dennis Dalessandro <dennis.dalessandro@xxxxxxxxxxxxxxxxxxxx>




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