RDMA/core: Validate the passed in fops for ib_get_ucaps()

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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.

Link: https://patch.msgid.link/r/0-v1-fd9482545e37+1e25-ib_ucaps_fd_ops_jgg@nvidia.com
Cc: stable@vger.kernel.org
Fixes: 61e5168281 ("RDMA/uverbs: Introduce UCAP (User CAPabilities) API")
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

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Jason Gunthorpe 2026-05-26 12:40:25 -03:00

parent e43ffb69e0

commit 4a1b1ac274

1 changed files with 3 additions and 5 deletions

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8

drivers/infiniband/core/ucaps.c

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