This is a note to let you know that I've just added the patch titled
RDMA/irdma: Fix sleep from invalid context BUG
to the 5.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
rdma-irdma-fix-sleep-from-invalid-context-bug.patch
and it can be found in the queue-5.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit f1feef3fba959058181744c89d3945f41e5ce6e9
Author: Mustafa Ismail <mustafa.ismail@xxxxxxxxx>
Date: Tue Jul 5 18:08:37 2022 -0500
RDMA/irdma: Fix sleep from invalid context BUG
[ Upstream commit cc0315564d6eec91c716d314b743321be24c70b3 ]
Taking the qos_mutex to process RoCEv2 QP's on netdev events causes a
kernel splat.
Fix this by removing the handling for RoCEv2 in
irdma_cm_teardown_connections that uses the mutex. This handling is only
needed for iWARP to avoid having connections established while the link is
down or having connections remain functional after the IP address is
removed.
BUG: sleeping function called from invalid context at kernel/locking/mutex.
Call Trace:
kernel: dump_stack+0x66/0x90
kernel: ___might_sleep.cold.92+0x8d/0x9a
kernel: mutex_lock+0x1c/0x40
kernel: irdma_cm_teardown_connections+0x28e/0x4d0 [irdma]
kernel: ? check_preempt_curr+0x7a/0x90
kernel: ? select_idle_sibling+0x22/0x3c0
kernel: ? select_task_rq_fair+0x94c/0xc90
kernel: ? irdma_exec_cqp_cmd+0xc27/0x17c0 [irdma]
kernel: ? __wake_up_common+0x7a/0x190
kernel: irdma_if_notify+0x3cc/0x450 [irdma]
kernel: ? sched_clock_cpu+0xc/0xb0
kernel: irdma_inet6addr_event+0xc6/0x150 [irdma]
Fixes: 146b9756f14c ("RDMA/irdma: Add connection manager")
Signed-off-by: Mustafa Ismail <mustafa.ismail@xxxxxxxxx>
Signed-off-by: Shiraz Saleem <shiraz.saleem@xxxxxxxxx>
Signed-off-by: Jason Gunthorpe <jgg@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/infiniband/hw/irdma/cm.c b/drivers/infiniband/hw/irdma/cm.c
index 638bf4a1ed94..646fa8677490 100644
--- a/drivers/infiniband/hw/irdma/cm.c
+++ b/drivers/infiniband/hw/irdma/cm.c
@@ -4231,10 +4231,6 @@ void irdma_cm_teardown_connections(struct irdma_device *iwdev, u32 *ipaddr,
struct irdma_cm_node *cm_node;
struct list_head teardown_list;
struct ib_qp_attr attr;
- struct irdma_sc_vsi *vsi = &iwdev->vsi;
- struct irdma_sc_qp *sc_qp;
- struct irdma_qp *qp;
- int i;
INIT_LIST_HEAD(&teardown_list);
@@ -4251,52 +4247,6 @@ void irdma_cm_teardown_connections(struct irdma_device *iwdev, u32 *ipaddr,
irdma_cm_disconn(cm_node->iwqp);
irdma_rem_ref_cm_node(cm_node);
}
- if (!iwdev->roce_mode)
- return;
-
- INIT_LIST_HEAD(&teardown_list);
- for (i = 0; i < IRDMA_MAX_USER_PRIORITY; i++) {
- mutex_lock(&vsi->qos[i].qos_mutex);
- list_for_each_safe (list_node, list_core_temp,
- &vsi->qos[i].qplist) {
- u32 qp_ip[4];
-
- sc_qp = container_of(list_node, struct irdma_sc_qp,
- list);
- if (sc_qp->qp_uk.qp_type != IRDMA_QP_TYPE_ROCE_RC)
- continue;
-
- qp = sc_qp->qp_uk.back_qp;
- if (!disconnect_all) {
- if (nfo->ipv4)
- qp_ip[0] = qp->udp_info.local_ipaddr[3];
- else
- memcpy(qp_ip,
- &qp->udp_info.local_ipaddr[0],
- sizeof(qp_ip));
- }
-
- if (disconnect_all ||
- (nfo->vlan_id == (qp->udp_info.vlan_tag & VLAN_VID_MASK) &&
- !memcmp(qp_ip, ipaddr, nfo->ipv4 ? 4 : 16))) {
- spin_lock(&iwdev->rf->qptable_lock);
- if (iwdev->rf->qp_table[sc_qp->qp_uk.qp_id]) {
- irdma_qp_add_ref(&qp->ibqp);
- list_add(&qp->teardown_entry,
- &teardown_list);
- }
- spin_unlock(&iwdev->rf->qptable_lock);
- }
- }
- mutex_unlock(&vsi->qos[i].qos_mutex);
- }
-
- list_for_each_safe (list_node, list_core_temp, &teardown_list) {
- qp = container_of(list_node, struct irdma_qp, teardown_entry);
- attr.qp_state = IB_QPS_ERR;
- irdma_modify_qp_roce(&qp->ibqp, &attr, IB_QP_STATE, NULL);
- irdma_qp_rem_ref(&qp->ibqp);
- }
}
/**
