From: Jason Gunthorpe <jgg@nvidia.com>
To: linux-rdma@vger.kernel.org
Cc: Chiara Meiohas <cmeiohas@nvidia.com>,
Leon Romanovsky <leon@kernel.org>,
patches@lists.linux.dev, stable@vger.kernel.org,
Zhu Yanjun <yanjun.zhu@linux.dev>,
Yishai Hadas <yishaih@nvidia.com>
Subject: Re: [PATCH rc] RDMA/core: Validate the passed in fops for ib_get_ucaps()
Date: Tue, 2 Jun 2026 10:04:46 -0300 [thread overview]
Message-ID: <20260602130446.GA910183@nvidia.com> (raw)
In-Reply-To: <0-v1-fd9482545e37+1e25-ib_ucaps_fd_ops_jgg@nvidia.com>
On Tue, May 26, 2026 at 12:40:25PM -0300, Jason Gunthorpe wrote:
> Sashiko pointed out it is not safe to rely only on the devt because
> char/block alias so if the user finds a block device with the same dev_t
> it can masquerade as a ucap cdev fd.
>
> Test the f_ops to only accept authentic cdevs.
>
> Cc: stable@vger.kernel.org
> Fixes: 61e51682816d ("RDMA/uverbs: Introduce UCAP (User CAPabilities) API")
> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
> ---
> drivers/infiniband/core/ucaps.c | 8 +++-----
> 1 file changed, 3 insertions(+), 5 deletions(-)
Applied to for-rc
Jason
prev parent reply other threads:[~2026-06-02 13:05 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-05-26 15:40 [PATCH rc] RDMA/core: Validate the passed in fops for ib_get_ucaps() Jason Gunthorpe
2026-06-02 13:04 ` Jason Gunthorpe [this message]
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