From: hifoolno <553441439@xxxxxx>
If there were less than 2 entries in the multipath list, then
xprt_iter_current_entry() would never advance beyond the
first entry, which is correct for round robin behaviour, but not
for the list iteration.
The end result would be infinite looping in rpc_clnt_iterate_for_each_xprt()
as we would never see the xprt == NULL condition fulfilled.
Signed-off-by: hifoolno <553441439@xxxxxx>
---
net/sunrpc/xprtmultipath.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/net/sunrpc/xprtmultipath.c b/net/sunrpc/xprtmultipath.c
index 1693f81aae37..23c3aae1bb5b 100644
--- a/net/sunrpc/xprtmultipath.c
+++ b/net/sunrpc/xprtmultipath.c
@@ -278,14 +278,12 @@ static
struct rpc_xprt *xprt_iter_current_entry(struct rpc_xprt_iter *xpi)
{
struct rpc_xprt_switch *xps = rcu_dereference(xpi->xpi_xpswitch);
- struct list_head *head;
if (xps == NULL)
return NULL;
- head = &xps->xps_xprt_list;
- if (xpi->xpi_cursor == NULL || xps->xps_nxprts < 2)
- return xprt_switch_find_first_entry(head);
- return xprt_switch_find_current_entry(head, xpi->xpi_cursor);
+ return xprt_switch_set_next_cursor(&xps->xps_xprt_list,
+ &xpi->xpi_cursor,
+ find_next);
}
bool rpc_xprt_switch_has_addr(struct rpc_xprt_switch *xps,
--
2.17.1
