Commit 5ccbf63f authored Apr 26, 2018 by Ariel Levkovich Committed by Doug Ledford Apr 27, 2018

IB/uverbs: Prevent reregistration of DM_MR to regular MR



This patch adds a check in the ib_uverbs_rereg_mr flow to make
sure there's no attempt to rereg a device memory MR to regular MR.
In such case the command will fail with -EINVAL status.

fixes: be934cca ("IB/uverbs: Add device memory registration ioctl support")
Signed-off-by: Ariel Levkovich <lariel@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>

parent 4f9ca2d8

drivers/infiniband/core/uverbs_cmd.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -765,6 +765,11 @@ ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file,

		mr = uobj->object;

		if (mr->dm) {
		ret = -EINVAL;
		goto put_uobjs;
		}

		if (cmd.flags & IB_MR_REREG_ACCESS) {
		ret = ib_check_mr_access(cmd.access_flags);
		if (ret)