linux-kernel - Re: [PATCH net] RDMA/mana_ib: use the correct page size for mapping user-mode doorbell page

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]

Message-ID: <20240829135358.GA2923441@kernel.org>
Date: Thu, 29 Aug 2024 14:53:58 +0100
From: Simon Horman <horms@...nel.org>
To: longli@...uxonhyperv.com
Cc: Jason Gunthorpe <jgg@...pe.ca>, Leon Romanovsky <leon@...nel.org>,
	Ajay Sharma <sharmaajay@...rosoft.com>,
	Konstantin Taranov <kotaranov@...rosoft.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	linux-rdma@...r.kernel.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, Long Li <longli@...rosoft.com>,
	stable@...r.kernel.org
Subject: Re: [PATCH net] RDMA/mana_ib: use the correct page size for mapping
 user-mode doorbell page

On Wed, Aug 28, 2024 at 01:06:09PM -0700, longli@...uxonhyperv.com wrote:
> From: Long Li <longli@...rosoft.com>
> 
> When mapping doorbell page from user-mode, the driver should use the system
> page size as the doorbell is allocated via mmap() from user-mode.
> 
> Cc: stable@...r.kernel.org
> Fixes: 0266a177631d ("RDMA/mana_ib: Add a driver for Microsoft Azure Network Adapter")
> Signed-off-by: Long Li <longli@...rosoft.com>
> ---
>  drivers/infiniband/hw/mana/main.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/infiniband/hw/mana/main.c b/drivers/infiniband/hw/mana/main.c
> index f68f54aea820..b26c4ebec2e0 100644
> --- a/drivers/infiniband/hw/mana/main.c
> +++ b/drivers/infiniband/hw/mana/main.c
> @@ -511,13 +511,13 @@ int mana_ib_mmap(struct ib_ucontext *ibcontext, struct vm_area_struct *vma)
>  	      PAGE_SHIFT;
>  	prot = pgprot_writecombine(vma->vm_page_prot);
>  
> -	ret = rdma_user_mmap_io(ibcontext, vma, pfn, gc->db_page_size, prot,
> +	ret = rdma_user_mmap_io(ibcontext, vma, pfn, PAGE_SIZE, prot,
>  				NULL);
>  	if (ret)
>  		ibdev_dbg(ibdev, "can't rdma_user_mmap_io ret %d\n", ret);
>  	else
>  		ibdev_dbg(ibdev, "mapped I/O pfn 0x%llx page_size %u, ret %d\n",
> -			  pfn, gc->db_page_size, ret);
> +			  pfn, PAGE_SIZE, ret);

This is not a full review, but according to both clang-18 and gcc-14,
this patch should also update the format specifier from %u to %lu.

>  
>  	return ret;
>  }
> -- 
> 2.17.1
> 
>