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IB/uverbs: Prevent reregistration of DM_MR to regular MR

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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: be934cca9e ("IB/uverbs: Add device memory registration ioctl support")
Signed-off-by: Ariel Levkovich <[email protected]>
Signed-off-by: Leon Romanovsky <[email protected]>
Signed-off-by: Doug Ledford <[email protected]>
This commit is contained in:
Ariel Levkovich 2018-04-26 15:42:54 +03:00 • committed by Doug Ledford
commit 5ccbf63f87
1 changed files with 5 additions and 0 deletions
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5
drivers/infiniband/core/uverbs_cmd.c
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@ -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)