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Merge git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending

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Pull scsi target fixes from Nicholas Bellinger:
 "Apologies for the late pull request.

  Here are the outstanding target-pending fixes for v4.1 code.

  The series contains three patches from Sagi + Co that address a few
  iser-target issues that have been uncovered during recent testing at
  Mellanox.

  Patch #1 has a v3.16+ stable tag, and #2-3 have v3.10+ stable tags"

* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
  iser-target: Fix possible use-after-free
  iser-target: release stale iser connections
  iser-target: Fix variable-length response error completion
This commit is contained in:
Linus Torvalds 2015-06-20 17:26:01 -07:00
commit d2228e4310
1 changed files with 22 additions and 3 deletions
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25
drivers/infiniband/ulp/isert/ib_isert.c
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@ -65,6 +65,8 @@ static int
isert_rdma_accept(struct isert_conn *isert_conn);
struct rdma_cm_id *isert_setup_id(struct isert_np *isert_np);
static void isert_release_work(struct work_struct *work);
static inline bool
isert_prot_cmd(struct isert_conn *conn, struct se_cmd *cmd)
{
@ -648,6 +650,7 @@ isert_init_conn(struct isert_conn *isert_conn)
mutex_init(&isert_conn->mutex);
spin_lock_init(&isert_conn->pool_lock);
INIT_LIST_HEAD(&isert_conn->fr_pool);
INIT_WORK(&isert_conn->release_work, isert_release_work);
}
static void
@ -925,6 +928,7 @@ isert_disconnected_handler(struct rdma_cm_id *cma_id,
{
struct isert_np *isert_np = cma_id->context;
struct isert_conn *isert_conn;
bool terminating = false;
if (isert_np->np_cm_id == cma_id)
return isert_np_cma_handler(cma_id->context, event);
@ -932,12 +936,25 @@ isert_disconnected_handler(struct rdma_cm_id *cma_id,
isert_conn = cma_id->qp->qp_context;
mutex_lock(&isert_conn->mutex);
terminating = (isert_conn->state == ISER_CONN_TERMINATING);
isert_conn_terminate(isert_conn);
mutex_unlock(&isert_conn->mutex);
isert_info("conn %p completing wait\n", isert_conn);
complete(&isert_conn->wait);
if (terminating)
goto out;
mutex_lock(&isert_np->np_accept_mutex);
if (!list_empty(&isert_conn->accept_node)) {
list_del_init(&isert_conn->accept_node);
isert_put_conn(isert_conn);
queue_work(isert_release_wq, &isert_conn->release_work);
}
mutex_unlock(&isert_np->np_accept_mutex);
out:
return 0;
}
@ -2380,7 +2397,6 @@ isert_build_rdma_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd,
page_off = offset % PAGE_SIZE;
send_wr->sg_list = ib_sge;
send_wr->num_sge = sg_nents;
send_wr->wr_id = (uintptr_t)&isert_cmd->tx_desc;
/*
* Perform mapping of TCM scatterlist memory ib_sge dma_addr.
@ -2400,14 +2416,17 @@ isert_build_rdma_wr(struct isert_conn *isert_conn, struct isert_cmd *isert_cmd,
ib_sge->addr, ib_sge->length, ib_sge->lkey);
page_off = 0;
data_left -= ib_sge->length;
if (!data_left)
break;
ib_sge++;
isert_dbg("Incrementing ib_sge pointer to %p\n", ib_sge);
}
send_wr->num_sge = ++i;
isert_dbg("Set outgoing sg_list: %p num_sg: %u from TCM SGLs\n",
send_wr->sg_list, send_wr->num_sge);
return sg_nents;
return send_wr->num_sge;
}
static int
@ -3366,7 +3385,6 @@ static void isert_wait_conn(struct iscsi_conn *conn)
isert_wait4flush(isert_conn);
isert_wait4logout(isert_conn);
INIT_WORK(&isert_conn->release_work, isert_release_work);
queue_work(isert_release_wq, &isert_conn->release_work);
}
@ -3374,6 +3392,7 @@ static void isert_free_conn(struct iscsi_conn *conn)
{
struct isert_conn *isert_conn = conn->context;
isert_wait4flush(isert_conn);
isert_put_conn(isert_conn);
}