Commit 5ccbf63f authored by Ariel Levkovich's avatar Ariel Levkovich Committed by Doug Ledford

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: default avatarAriel Levkovich <lariel@mellanox.com>
Signed-off-by: default avatarLeon Romanovsky <leonro@mellanox.com>
Signed-off-by: default avatarDoug Ledford <dledford@redhat.com>
parent 4f9ca2d8
...@@ -765,6 +765,11 @@ ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file, ...@@ -765,6 +765,11 @@ ssize_t ib_uverbs_rereg_mr(struct ib_uverbs_file *file,
mr = uobj->object; mr = uobj->object;
if (mr->dm) {
ret = -EINVAL;
goto put_uobjs;
}
if (cmd.flags & IB_MR_REREG_ACCESS) { if (cmd.flags & IB_MR_REREG_ACCESS) {
ret = ib_check_mr_access(cmd.access_flags); ret = ib_check_mr_access(cmd.access_flags);
if (ret) if (ret)
......
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