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IB/uverbs: UAPI pointers should use __aligned_u64 type

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The ioctl() UAPIs are meant to be used by both user-space
and kernel ioctl() handlers.

Mostly, these UAPI structs tend to consist of simple types, but
sometimes user-space pointers may be passed between user-space and
kernel. We would like to avoid dereferencing a user-space pointer in
the kernel, thus - we always define RDMA_UAPI_PTR as a __aligned_u64
type.

Fixes: 1f7ff9d5d3 ('IB/uverbs: Move to new headers and make naming consistent')
Signed-off-by: Matan Barak <matanb@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
This commit is contained in:
Matan Barak 2018-03-22 11:52:02 +02:00 committed by Jason Gunthorpe
parent 819b60286e
commit be23fb9a2c
1 changed files with 1 additions and 1 deletions
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2
include/uapi/rdma/ib_user_ioctl_verbs.h
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@ -37,7 +37,7 @@
#include <linux/types.h>
#ifndef RDMA_UAPI_PTR
#define RDMA_UAPI_PTR(_type, _name) _type __attribute__((aligned(8))) _name
#define RDMA_UAPI_PTR(_type, _name) __aligned_u64 _name
#endif
#endif