On Mon, May 25, 2020 at 10:16:24PM +0800, Xiyu Yang wrote:
In order to create or activate a new node, lpfc_els_unsol_buffer()lpfc_enable_node() is not changing the refcnt.
invokes lpfc_nlp_init() or lpfc_enable_node() or lpfc_nlp_get(), all of
them will return a reference of the specified lpfc_nodelist object to
"ndlp" with increased refcnt.
When lpfc_els_unsol_buffer() returns, local variable "ndlp" becomesThis sounds reasonable. At least the lpfc_nlp_init() and lpfc_nlp_get() case
invalid, so the refcount should be decreased to keep refcount balanced.
The reference counting issue happens in one exception handling path of
lpfc_els_unsol_buffer(). When "ndlp" in DEV_LOSS, the function forgets
to decrease the refcnt increased by lpfc_nlp_init() or
lpfc_enable_node() or lpfc_nlp_get(), causing a refcnt leak.
Fix this issue by calling lpfc_nlp_put() when "ndlp" in DEV_LOSS.
needs this. And I suppose this is also ok for the lfpc_enable_node().
Reviewed-by: Daniel Wagner <dwagner@xxxxxxx>