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* [PATCH AUTOSEL 4.9 07/66] RDMA/i40iw: Fix incorrect iterator type
       [not found] <20191110024846.32598-1-sashal@kernel.org>
@ 2019-11-10  2:47 ` Sasha Levin
  2019-11-10  2:48 ` [PATCH AUTOSEL 4.9 66/66] IB/iser: Fix possible NULL deref at iser_inv_desc() Sasha Levin
  1 sibling, 0 replies; 2+ messages in thread
From: Sasha Levin @ 2019-11-10  2:47 UTC (permalink / raw)
  To: linux-kernel, stable
  Cc: Håkon Bugge, Håkon Bugge, Jason Gunthorpe, Sasha Levin,
	linux-rdma

From: Håkon Bugge <Haakon.Bugge@oracle.com>

[ Upstream commit 802fa45cd320de319e86c93bca72abec028ba059 ]

Commit f27b4746f378 ("i40iw: add connection management code") uses an
incorrect rcu iterator, whilst holding the rtnl_lock. Since the
critical region invokes i40iw_manage_qhash(), which is a sleeping
function, the rcu locking and traversal cannot be used.

Signed-off-by: Håkon Bugge <haakon.bugge@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/infiniband/hw/i40iw/i40iw_cm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/infiniband/hw/i40iw/i40iw_cm.c b/drivers/infiniband/hw/i40iw/i40iw_cm.c
index 85637696f6e96..282a726351c81 100644
--- a/drivers/infiniband/hw/i40iw/i40iw_cm.c
+++ b/drivers/infiniband/hw/i40iw/i40iw_cm.c
@@ -1652,7 +1652,7 @@ static enum i40iw_status_code i40iw_add_mqh_6(struct i40iw_device *iwdev,
 	unsigned long flags;
 
 	rtnl_lock();
-	for_each_netdev_rcu(&init_net, ip_dev) {
+	for_each_netdev(&init_net, ip_dev) {
 		if ((((rdma_vlan_dev_vlan_id(ip_dev) < I40IW_NO_VLAN) &&
 		      (rdma_vlan_dev_real_dev(ip_dev) == iwdev->netdev)) ||
 		     (ip_dev == iwdev->netdev)) && (ip_dev->flags & IFF_UP)) {
-- 
2.20.1


^ permalink raw reply	[flat|nested] 2+ messages in thread

* [PATCH AUTOSEL 4.9 66/66] IB/iser: Fix possible NULL deref at iser_inv_desc()
       [not found] <20191110024846.32598-1-sashal@kernel.org>
  2019-11-10  2:47 ` [PATCH AUTOSEL 4.9 07/66] RDMA/i40iw: Fix incorrect iterator type Sasha Levin
@ 2019-11-10  2:48 ` Sasha Levin
  1 sibling, 0 replies; 2+ messages in thread
From: Sasha Levin @ 2019-11-10  2:48 UTC (permalink / raw)
  To: linux-kernel, stable
  Cc: Israel Rukshin, Max Gurtovoy, Sagi Grimberg, Jason Gunthorpe,
	Sasha Levin, linux-rdma

From: Israel Rukshin <israelr@mellanox.com>

[ Upstream commit 65f07f5a09dacf3b60619f196f096ea3671a5eda ]

In case target remote invalidates bogus rkey and signature is not used,
pi_ctx is NULL deref.

The commit also fails the connection on bogus remote invalidation.

Fixes: 59caaed7a72a ("IB/iser: Support the remote invalidation exception")
Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Reviewed-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/infiniband/ulp/iser/iser_initiator.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/drivers/infiniband/ulp/iser/iser_initiator.c b/drivers/infiniband/ulp/iser/iser_initiator.c
index 81ae2e30dd125..27a7e4406f343 100644
--- a/drivers/infiniband/ulp/iser/iser_initiator.c
+++ b/drivers/infiniband/ulp/iser/iser_initiator.c
@@ -590,13 +590,19 @@ void iser_login_rsp(struct ib_cq *cq, struct ib_wc *wc)
 	ib_conn->post_recv_buf_count--;
 }
 
-static inline void
+static inline int
 iser_inv_desc(struct iser_fr_desc *desc, u32 rkey)
 {
-	if (likely(rkey == desc->rsc.mr->rkey))
+	if (likely(rkey == desc->rsc.mr->rkey)) {
 		desc->rsc.mr_valid = 0;
-	else if (likely(rkey == desc->pi_ctx->sig_mr->rkey))
+	} else if (likely(desc->pi_ctx && rkey == desc->pi_ctx->sig_mr->rkey)) {
 		desc->pi_ctx->sig_mr_valid = 0;
+	} else {
+		iser_err("Bogus remote invalidation for rkey %#x\n", rkey);
+		return -EINVAL;
+	}
+
+	return 0;
 }
 
 static int
@@ -624,12 +630,14 @@ iser_check_remote_inv(struct iser_conn *iser_conn,
 
 			if (iser_task->dir[ISER_DIR_IN]) {
 				desc = iser_task->rdma_reg[ISER_DIR_IN].mem_h;
-				iser_inv_desc(desc, rkey);
+				if (unlikely(iser_inv_desc(desc, rkey)))
+					return -EINVAL;
 			}
 
 			if (iser_task->dir[ISER_DIR_OUT]) {
 				desc = iser_task->rdma_reg[ISER_DIR_OUT].mem_h;
-				iser_inv_desc(desc, rkey);
+				if (unlikely(iser_inv_desc(desc, rkey)))
+					return -EINVAL;
 			}
 		} else {
 			iser_err("failed to get task for itt=%d\n", hdr->itt);
-- 
2.20.1


^ permalink raw reply	[flat|nested] 2+ messages in thread

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2019-11-10  2:47 ` [PATCH AUTOSEL 4.9 07/66] RDMA/i40iw: Fix incorrect iterator type Sasha Levin
2019-11-10  2:48 ` [PATCH AUTOSEL 4.9 66/66] IB/iser: Fix possible NULL deref at iser_inv_desc() Sasha Levin

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