From: Edward Srouji <edwards@xxxxxxxxxx>
According to the IB specification rel-1.6, section 3.5.3:
"QKEYs with the most significant bit set are considered controlled
QKEYs, and a HCA does not allow a consumer to arbitrarily specify a
controlled QKEY."
Thus, block non-privileged users from setting such a QKEY.
Fixes: bc38a6abdd5a ("[PATCH] IB uverbs: core implementation")
Signed-off-by: Edward Srouji <edwards@xxxxxxxxxx>
Signed-off-by: Leon Romanovsky <leonro@xxxxxxxxxx>
---
drivers/infiniband/core/uverbs_cmd.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/infiniband/core/uverbs_cmd.c b/drivers/infiniband/core/uverbs_cmd.c
index 4796f6a8828c..e836c9c477f6 100644
--- a/drivers/infiniband/core/uverbs_cmd.c
+++ b/drivers/infiniband/core/uverbs_cmd.c
@@ -1850,8 +1850,13 @@ static int modify_qp(struct uverbs_attr_bundle *attrs,
attr->path_mtu = cmd->base.path_mtu;
if (cmd->base.attr_mask & IB_QP_PATH_MIG_STATE)
attr->path_mig_state = cmd->base.path_mig_state;
- if (cmd->base.attr_mask & IB_QP_QKEY)
+ if (cmd->base.attr_mask & IB_QP_QKEY) {
+ if (cmd->base.qkey & IB_QP_SET_QKEY && !capable(CAP_NET_RAW)) {
+ ret = -EPERM;
+ goto release_qp;
+ }
attr->qkey = cmd->base.qkey;
+ }
if (cmd->base.attr_mask & IB_QP_RQ_PSN)
attr->rq_psn = cmd->base.rq_psn;
if (cmd->base.attr_mask & IB_QP_SQ_PSN)
--
2.40.1
