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| author | Ariel Levkovich <lariel@mellanox.com> | 2018-04-26 14:42:54 +0200 |
|---|---|---|
| committer | Doug Ledford <dledford@redhat.com> | 2018-04-27 20:22:24 +0200 |
| commit | 5ccbf63f87a39c279729670d2e31166844a335c6 (patch) | |
| tree | 58e78361f5595303d03bcc70d34a11b463535667 /drivers | |
| parent | RDMA/mlx4: Add missed RSS hash inner header flag (diff) | |
| download | linux-5ccbf63f87a39c279729670d2e31166844a335c6.tar.xz linux-5ccbf63f87a39c279729670d2e31166844a335c6.zip | |
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: be934cca9e98 ("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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/infiniband/core/uverbs_cmd.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c index 13cb5e4deb86..1837924415c9 100644 --- a/drivers/infiniband/core/uverbs_cmd.c +++ b/drivers/infiniband/core/uverbs_cmd.c @@ -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) |