RDMA/hfi1: Prevent memory leak in sdma_init

In sdma_init if rhashtable_init fails the allocated memory for
tmp_sdma_rht should be released.

Fixes: 5a52a7acf7e2 ("IB/hfi1: NULL pointer dereference when freeing rhashtable")
Link: https://lore.kernel.org/r/20190925144543.10141-1-navid.emamdoost@gmail.com
Signed-off-by: Navid Emamdoost <navid.emamdoost@gmail.com>
Acked-by: Dennis Dalessandro <dennis.dalessandro@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>

diff --git a/drivers/infiniband/hw/hfi1/sdma.c b/drivers/infiniband/hw/hfi1/sdma.c
index 2395fd4233a7e729041b2f31fb8639c996fa70ed..2ed7bfd5feea6a5ec5206ac77ff583ab1f77daa4 100644 (file)
--- a/drivers/infiniband/hw/hfi1/sdma.c
+++ b/drivers/infiniband/hw/hfi1/sdma.c
@@ -1526,8 +1526,11 @@ int sdma_init(struct hfi1_devdata *dd, u8 port)
        }
 
        ret = rhashtable_init(tmp_sdma_rht, &sdma_rht_params);
-       if (ret < 0)
+       if (ret < 0) {
+               kfree(tmp_sdma_rht);
                goto bail;
+       }
+
        dd->sdma_rht = tmp_sdma_rht;
 
        dd_dev_info(dd, "SDMA num_sdma: %u\n", dd->num_sdma);